rm node_modules

1 files changed, 0 insertions, 3076 deletions

diff --git a/node_modules/mquery/test/index.js b/node_modules/mquery/test/index.js
deleted file mode 100644
index 44adb17..0000000
--- a/node_modules/mquery/test/index.js
+++ /dev/null
@@ -1,3076 +0,0 @@
-var mquery = require('../');
-var assert = require('assert');
-
-/* global Map */
-
-describe('mquery', function() {
-  var col;
-
-  before(function(done) {
-    // get the env specific collection interface
-    require('./env').getCollection(function(err, collection) {
-      assert.ifError(err);
-      col = collection;
-      done();
-    });
-  });
-
-  after(function(done) {
-    require('./env').dropCollection(done);
-  });
-
-  describe('mquery', function() {
-    it('is a function', function() {
-      assert.equal('function', typeof mquery);
-    });
-    it('creates instances with the `new` keyword', function() {
-      assert.ok(mquery() instanceof mquery);
-    });
-    describe('defaults', function() {
-      it('are set', function() {
-        var m = mquery();
-        assert.strictEqual(undefined, m.op);
-        assert.deepEqual({}, m.options);
-      });
-    });
-    describe('criteria', function() {
-      it('if collection-like is used as collection', function() {
-        var m = mquery(col);
-        assert.equal(col, m._collection.collection);
-      });
-      it('non-collection-like is used as criteria', function() {
-        var m = mquery({ works: true });
-        assert.ok(!m._collection);
-        assert.deepEqual({ works: true }, m._conditions);
-      });
-    });
-    describe('options', function() {
-      it('are merged when passed', function() {
-        var m;
-        m = mquery(col, { safe: true });
-        assert.deepEqual({ safe: true }, m.options);
-        m = mquery({ name: 'mquery' }, { safe: true });
-        assert.deepEqual({ safe: true }, m.options);
-      });
-    });
-  });
-
-  describe('toConstructor', function() {
-    it('creates subclasses of mquery', function() {
-      var opts = { safe: { w: 'majority' }, readPreference: 'p' };
-      var match = { name: 'test', count: { $gt: 101 }};
-      var select = { name: 1, count: 0 };
-      var update = { $set: { x: true }};
-      var path = 'street';
-
-      var q = mquery().setOptions(opts);
-      q.where(match);
-      q.select(select);
-      q.update(update);
-      q.where(path);
-      q.find();
-
-      var M = q.toConstructor();
-      var m = M();
-
-      assert.ok(m instanceof mquery);
-      assert.deepEqual(opts, m.options);
-      assert.deepEqual(match, m._conditions);
-      assert.deepEqual(select, m._fields);
-      assert.deepEqual(update, m._update);
-      assert.equal(path, m._path);
-      assert.equal('find', m.op);
-    });
-  });
-
-  describe('setOptions', function() {
-    it('calls associated methods', function() {
-      var m = mquery();
-      assert.equal(m._collection, null);
-      m.setOptions({ collection: col });
-      assert.equal(m._collection.collection, col);
-    });
-    it('directly sets option when no method exists', function() {
-      var m = mquery();
-      assert.equal(m.options.woot, null);
-      m.setOptions({ woot: 'yay' });
-      assert.equal(m.options.woot, 'yay');
-    });
-    it('is chainable', function() {
-      var m = mquery(),
-          n;
-
-      n = m.setOptions();
-      assert.equal(m, n);
-      n = m.setOptions({ x: 1 });
-      assert.equal(m, n);
-    });
-  });
-
-  describe('collection', function() {
-    it('sets the _collection', function() {
-      var m = mquery();
-      m.collection(col);
-      assert.equal(m._collection.collection, col);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      var n = m.collection(col);
-      assert.equal(m, n);
-    });
-  });
-
-  describe('$where', function() {
-    it('sets the $where condition', function() {
-      var m = mquery();
-      function go() {}
-      m.$where(go);
-      assert.ok(go === m._conditions.$where);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      var n = m.$where('x');
-      assert.equal(m, n);
-    });
-  });
-
-  describe('where', function() {
-    it('without arguments', function() {
-      var m = mquery();
-      m.where();
-      assert.deepEqual({}, m._conditions);
-    });
-    it('with non-string/object argument', function() {
-      var m = mquery();
-
-      assert.throws(function() {
-        m.where([]);
-      }, /path must be a string or object/);
-    });
-    describe('with one argument', function() {
-      it('that is an object', function() {
-        var m = mquery();
-        m.where({ name: 'flawed' });
-        assert.strictEqual(m._conditions.name, 'flawed');
-      });
-      it('that is a query', function() {
-        var m = mquery({ name: 'first' });
-        var n = mquery({ name: 'changed' });
-        m.where(n);
-        assert.strictEqual(m._conditions.name, 'changed');
-      });
-      it('that is a string', function() {
-        var m = mquery();
-        m.where('name');
-        assert.equal('name', m._path);
-        assert.strictEqual(m._conditions.name, undefined);
-      });
-    });
-    it('with two arguments', function() {
-      var m = mquery();
-      m.where('name', 'The Great Pumpkin');
-      assert.equal('name', m._path);
-      assert.strictEqual(m._conditions.name, 'The Great Pumpkin');
-    });
-    it('is chainable', function() {
-      var m = mquery(),
-          n;
-
-      n = m.where('x', 'y');
-      assert.equal(m, n);
-      n = m.where();
-      assert.equal(m, n);
-    });
-  });
-  describe('equals', function() {
-    it('must be called after where()', function() {
-      var m = mquery();
-      assert.throws(function() {
-        m.equals();
-      }, /must be used after where/);
-    });
-    it('sets value of path set with where()', function() {
-      var m = mquery();
-      m.where('age').equals(1000);
-      assert.deepEqual({ age: 1000 }, m._conditions);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      var n = m.where('x').equals(3);
-      assert.equal(m, n);
-    });
-  });
-  describe('eq', function() {
-    it('is alias of equals', function() {
-      var m = mquery();
-      m.where('age').eq(1000);
-      assert.deepEqual({ age: 1000 }, m._conditions);
-    });
-  });
-  describe('or', function() {
-    it('pushes onto the internal $or condition', function() {
-      var m = mquery();
-      m.or({ 'Nightmare Before Christmas': true });
-      assert.deepEqual([{'Nightmare Before Christmas': true }], m._conditions.$or);
-    });
-    it('allows passing arrays', function() {
-      var m = mquery();
-      var arg = [{ 'Nightmare Before Christmas': true }, { x: 1 }];
-      m.or(arg);
-      assert.deepEqual(arg, m._conditions.$or);
-    });
-    it('allows calling multiple times', function() {
-      var m = mquery();
-      var arg = [{ looper: true }, { x: 1 }];
-      m.or(arg);
-      m.or({ y: 1 });
-      m.or([{ w: 'oo' }, { z: 'oo'} ]);
-      assert.deepEqual([{looper:true},{x:1},{y:1},{w:'oo'},{z:'oo'}], m._conditions.$or);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      m.or({ o: 'k'}).where('name', 'table');
-      assert.deepEqual({ name: 'table', $or: [{ o: 'k' }] }, m._conditions);
-    });
-  });
-
-  describe('nor', function() {
-    it('pushes onto the internal $nor condition', function() {
-      var m = mquery();
-      m.nor({ 'Nightmare Before Christmas': true });
-      assert.deepEqual([{'Nightmare Before Christmas': true }], m._conditions.$nor);
-    });
-    it('allows passing arrays', function() {
-      var m = mquery();
-      var arg = [{ 'Nightmare Before Christmas': true }, { x: 1 }];
-      m.nor(arg);
-      assert.deepEqual(arg, m._conditions.$nor);
-    });
-    it('allows calling multiple times', function() {
-      var m = mquery();
-      var arg = [{ looper: true }, { x: 1 }];
-      m.nor(arg);
-      m.nor({ y: 1 });
-      m.nor([{ w: 'oo' }, { z: 'oo'} ]);
-      assert.deepEqual([{looper:true},{x:1},{y:1},{w:'oo'},{z:'oo'}], m._conditions.$nor);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      m.nor({ o: 'k'}).where('name', 'table');
-      assert.deepEqual({ name: 'table', $nor: [{ o: 'k' }] }, m._conditions);
-    });
-  });
-
-  describe('and', function() {
-    it('pushes onto the internal $and condition', function() {
-      var m = mquery();
-      m.and({ 'Nightmare Before Christmas': true });
-      assert.deepEqual([{'Nightmare Before Christmas': true }], m._conditions.$and);
-    });
-    it('allows passing arrays', function() {
-      var m = mquery();
-      var arg = [{ 'Nightmare Before Christmas': true }, { x: 1 }];
-      m.and(arg);
-      assert.deepEqual(arg, m._conditions.$and);
-    });
-    it('allows calling multiple times', function() {
-      var m = mquery();
-      var arg = [{ looper: true }, { x: 1 }];
-      m.and(arg);
-      m.and({ y: 1 });
-      m.and([{ w: 'oo' }, { z: 'oo'} ]);
-      assert.deepEqual([{looper:true},{x:1},{y:1},{w:'oo'},{z:'oo'}], m._conditions.$and);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      m.and({ o: 'k'}).where('name', 'table');
-      assert.deepEqual({ name: 'table', $and: [{ o: 'k' }] }, m._conditions);
-    });
-  });
-
-  function generalCondition(type) {
-    return function() {
-      it('accepts 2 args', function() {
-        var m = mquery()[type]('count', 3);
-        var check = {};
-        check['$' + type] = 3;
-        assert.deepEqual(m._conditions.count, check);
-      });
-      it('uses previously set `where` path if 1 arg passed', function() {
-        var m = mquery().where('count')[type](3);
-        var check = {};
-        check['$' + type] = 3;
-        assert.deepEqual(m._conditions.count, check);
-      });
-      it('throws if 1 arg was passed but no previous `where` was used', function() {
-        assert.throws(function() {
-          mquery()[type](3);
-        }, /must be used after where/);
-      });
-      it('is chainable', function() {
-        var m = mquery().where('count')[type](3).where('x', 8);
-        var check = {x: 8, count: {}};
-        check.count['$' + type] = 3;
-        assert.deepEqual(m._conditions, check);
-      });
-      it('overwrites previous value', function() {
-        var m = mquery().where('count')[type](3)[type](8);
-        var check = {};
-        check['$' + type] = 8;
-        assert.deepEqual(m._conditions.count, check);
-      });
-    };
-  }
-
-  'gt gte lt lte ne in nin regex size maxDistance minDistance'.split(' ').forEach(function(type) {
-    describe(type, generalCondition(type));
-  });
-
-  describe('mod', function() {
-    describe('with 1 argument', function() {
-      it('requires a previous where()', function() {
-        assert.throws(function() {
-          mquery().mod([30, 10]);
-        }, /must be used after where/);
-      });
-      it('works', function() {
-        var m = mquery().where('madmen').mod([10,20]);
-        assert.deepEqual(m._conditions, { madmen: { $mod: [10,20] }});
-      });
-    });
-
-    describe('with 2 arguments and second is non-Array', function() {
-      it('requires a previous where()', function() {
-        assert.throws(function() {
-          mquery().mod('x', 10);
-        }, /must be used after where/);
-      });
-      it('works', function() {
-        var m = mquery().where('madmen').mod(10, 20);
-        assert.deepEqual(m._conditions, { madmen: { $mod: [10,20] }});
-      });
-    });
-
-    it('with 2 arguments and second is an array', function() {
-      var m = mquery().mod('madmen', [10,20]);
-      assert.deepEqual(m._conditions, { madmen: { $mod: [10,20] }});
-    });
-
-    it('with 3 arguments', function() {
-      var m = mquery().mod('madmen', 10, 20);
-      assert.deepEqual(m._conditions, { madmen: { $mod: [10,20] }});
-    });
-
-    it('is chainable', function() {
-      var m = mquery().mod('madmen', 10, 20).where('x', 8);
-      var check = { madmen: { $mod: [10,20] }, x: 8};
-      assert.deepEqual(m._conditions, check);
-    });
-  });
-
-  describe('exists', function() {
-    it('with 0 args', function() {
-      it('throws if not used after where()', function() {
-        assert.throws(function() {
-          mquery().exists();
-        }, /must be used after where/);
-      });
-      it('works', function() {
-        var m = mquery().where('name').exists();
-        var check = { name: { $exists: true }};
-        assert.deepEqual(m._conditions, check);
-      });
-    });
-
-    describe('with 1 arg', function() {
-      describe('that is boolean', function() {
-        it('throws if not used after where()', function() {
-          assert.throws(function() {
-            mquery().exists();
-          }, /must be used after where/);
-        });
-        it('works', function() {
-          var m = mquery().exists('name', false);
-          var check = { name: { $exists: false }};
-          assert.deepEqual(m._conditions, check);
-        });
-      });
-      describe('that is not boolean', function() {
-        it('sets the value to `true`', function() {
-          var m = mquery().where('name').exists('yummy');
-          var check = { yummy: { $exists: true }};
-          assert.deepEqual(m._conditions, check);
-        });
-      });
-    });
-
-    describe('with 2 args', function() {
-      it('works', function() {
-        var m = mquery().exists('yummy', false);
-        var check = { yummy: { $exists: false }};
-        assert.deepEqual(m._conditions, check);
-      });
-    });
-
-    it('is chainable', function() {
-      var m = mquery().where('name').exists().find({ x: 1 });
-      var check = { name: { $exists: true }, x: 1};
-      assert.deepEqual(m._conditions, check);
-    });
-  });
-
-  describe('elemMatch', function() {
-    describe('with null/undefined first argument', function() {
-      assert.throws(function() {
-        mquery().elemMatch();
-      }, /Invalid argument/);
-      assert.throws(function() {
-        mquery().elemMatch(null);
-      }, /Invalid argument/);
-      assert.doesNotThrow(function() {
-        mquery().elemMatch('', {});
-      });
-    });
-
-    describe('with 1 argument', function() {
-      it('throws if not a function or object', function() {
-        assert.throws(function() {
-          mquery().elemMatch([]);
-        }, /Invalid argument/);
-      });
-
-      describe('that is an object', function() {
-        it('throws if no previous `where` was used', function() {
-          assert.throws(function() {
-            mquery().elemMatch({});
-          }, /must be used after where/);
-        });
-        it('works', function() {
-          var m = mquery().where('comment').elemMatch({ author: 'joe', votes: {$gte: 3 }});
-          assert.deepEqual({ comment: { $elemMatch: { author: 'joe', votes: {$gte: 3}}}}, m._conditions);
-        });
-      });
-      describe('that is a function', function() {
-        it('throws if no previous `where` was used', function() {
-          assert.throws(function() {
-            mquery().elemMatch(function() {});
-          }, /must be used after where/);
-        });
-        it('works', function() {
-          var m = mquery().where('comment').elemMatch(function(query) {
-            query.where({ author: 'joe', votes: {$gte: 3 }});
-          });
-          assert.deepEqual({ comment: { $elemMatch: { author: 'joe', votes: {$gte: 3}}}}, m._conditions);
-        });
-      });
-    });
-
-    describe('with 2 arguments', function() {
-      describe('and the 2nd is an object', function() {
-        it('works', function() {
-          var m = mquery().elemMatch('comment', { author: 'joe', votes: {$gte: 3 }});
-          assert.deepEqual({ comment: { $elemMatch: { author: 'joe', votes: {$gte: 3}}}}, m._conditions);
-        });
-      });
-      describe('and the 2nd is a function', function() {
-        it('works', function() {
-          var m = mquery().elemMatch('comment', function(query) {
-            query.where({ author: 'joe', votes: {$gte: 3 }});
-          });
-          assert.deepEqual({ comment: { $elemMatch: { author: 'joe', votes: {$gte: 3}}}}, m._conditions);
-        });
-      });
-      it('and the 2nd is not a function or object', function() {
-        assert.throws(function() {
-          mquery().elemMatch('comment', []);
-        }, /Invalid argument/);
-      });
-    });
-  });
-
-  describe('within', function() {
-    it('is chainable', function() {
-      var m = mquery();
-      assert.equal(m.where('a').within(), m);
-    });
-    describe('when called with arguments', function() {
-      it('must follow where()', function() {
-        assert.throws(function() {
-          mquery().within([]);
-        }, /must be used after where/);
-      });
-
-      describe('of length 1', function() {
-        it('throws if not a recognized shape', function() {
-          assert.throws(function() {
-            mquery().where('loc').within({});
-          }, /Invalid argument/);
-          assert.throws(function() {
-            mquery().where('loc').within(null);
-          }, /Invalid argument/);
-        });
-        it('delegates to circle when center exists', function() {
-          var m = mquery().where('loc').within({ center: [10,10], radius: 3 });
-          assert.deepEqual({ $geoWithin: {$center:[[10,10], 3]}}, m._conditions.loc);
-        });
-        it('delegates to box when exists', function() {
-          var m = mquery().where('loc').within({ box: [[10,10], [11,14]] });
-          assert.deepEqual({ $geoWithin: {$box:[[10,10], [11,14]]}}, m._conditions.loc);
-        });
-        it('delegates to polygon when exists', function() {
-          var m = mquery().where('loc').within({ polygon: [[10,10], [11,14],[10,9]] });
-          assert.deepEqual({ $geoWithin: {$polygon:[[10,10], [11,14],[10,9]]}}, m._conditions.loc);
-        });
-        it('delegates to geometry when exists', function() {
-          var m = mquery().where('loc').within({ type: 'Polygon', coordinates: [[10,10], [11,14],[10,9]] });
-          assert.deepEqual({ $geoWithin: {$geometry: {type:'Polygon', coordinates: [[10,10], [11,14],[10,9]]}}}, m._conditions.loc);
-        });
-      });
-
-      describe('of length 2', function() {
-        it('delegates to box()', function() {
-          var m = mquery().where('loc').within([1,2],[2,5]);
-          assert.deepEqual(m._conditions.loc, { $geoWithin: { $box: [[1,2],[2,5]]}});
-        });
-      });
-
-      describe('of length > 2', function() {
-        it('delegates to polygon()', function() {
-          var m = mquery().where('loc').within([1,2],[2,5],[2,4],[1,3]);
-          assert.deepEqual(m._conditions.loc, { $geoWithin: { $polygon: [[1,2],[2,5],[2,4],[1,3]]}});
-        });
-      });
-    });
-  });
-
-  describe('geoWithin', function() {
-    before(function() {
-      mquery.use$geoWithin = false;
-    });
-    after(function() {
-      mquery.use$geoWithin = true;
-    });
-    describe('when called with arguments', function() {
-      describe('of length 1', function() {
-        it('delegates to circle when center exists', function() {
-          var m = mquery().where('loc').within({ center: [10,10], radius: 3 });
-          assert.deepEqual({ $within: {$center:[[10,10], 3]}}, m._conditions.loc);
-        });
-        it('delegates to box when exists', function() {
-          var m = mquery().where('loc').within({ box: [[10,10], [11,14]] });
-          assert.deepEqual({ $within: {$box:[[10,10], [11,14]]}}, m._conditions.loc);
-        });
-        it('delegates to polygon when exists', function() {
-          var m = mquery().where('loc').within({ polygon: [[10,10], [11,14],[10,9]] });
-          assert.deepEqual({ $within: {$polygon:[[10,10], [11,14],[10,9]]}}, m._conditions.loc);
-        });
-        it('delegates to geometry when exists', function() {
-          var m = mquery().where('loc').within({ type: 'Polygon', coordinates: [[10,10], [11,14],[10,9]] });
-          assert.deepEqual({ $within: {$geometry: {type:'Polygon', coordinates: [[10,10], [11,14],[10,9]]}}}, m._conditions.loc);
-        });
-      });
-
-      describe('of length 2', function() {
-        it('delegates to box()', function() {
-          var m = mquery().where('loc').within([1,2],[2,5]);
-          assert.deepEqual(m._conditions.loc, { $within: { $box: [[1,2],[2,5]]}});
-        });
-      });
-
-      describe('of length > 2', function() {
-        it('delegates to polygon()', function() {
-          var m = mquery().where('loc').within([1,2],[2,5],[2,4],[1,3]);
-          assert.deepEqual(m._conditions.loc, { $within: { $polygon: [[1,2],[2,5],[2,4],[1,3]]}});
-        });
-      });
-    });
-  });
-
-  describe('box', function() {
-    describe('with 1 argument', function() {
-      it('throws', function() {
-        assert.throws(function() {
-          mquery().box('sometihng');
-        }, /Invalid argument/);
-      });
-    });
-    describe('with > 3 arguments', function() {
-      it('throws', function() {
-        assert.throws(function() {
-          mquery().box(1,2,3,4);
-        }, /Invalid argument/);
-      });
-    });
-
-    describe('with 2 arguments', function() {
-      it('throws if not used after where()', function() {
-        assert.throws(function() {
-          mquery().box([],[]);
-        }, /must be used after where/);
-      });
-      it('works', function() {
-        var m = mquery().where('loc').box([1,2],[3,4]);
-        assert.deepEqual(m._conditions.loc, { $geoWithin: { $box: [[1,2],[3,4]] }});
-      });
-    });
-
-    describe('with 3 arguments', function() {
-      it('works', function() {
-        var m = mquery().box('loc', [1,2],[3,4]);
-        assert.deepEqual(m._conditions.loc, { $geoWithin: { $box: [[1,2],[3,4]] }});
-      });
-    });
-  });
-
-  describe('polygon', function() {
-    describe('when first argument is not a string', function() {
-      it('throws if not used after where()', function() {
-        assert.throws(function() {
-          mquery().polygon({});
-        }, /must be used after where/);
-
-        assert.doesNotThrow(function() {
-          mquery().where('loc').polygon([1,2], [2,3], [3,6]);
-        });
-      });
-
-      it('assigns arguments to within polygon condition', function() {
-        var m = mquery().where('loc').polygon([1,2], [2,3], [3,6]);
-        assert.deepEqual(m._conditions, { loc: {$geoWithin: {$polygon: [[1,2],[2,3],[3,6]]}} });
-      });
-    });
-
-    describe('when first arg is a string', function() {
-      it('assigns remaining arguments to within polygon condition', function() {
-        var m = mquery().polygon('loc', [1,2], [2,3], [3,6]);
-        assert.deepEqual(m._conditions, { loc: {$geoWithin: {$polygon: [[1,2],[2,3],[3,6]]}} });
-      });
-    });
-  });
-
-  describe('circle', function() {
-    describe('with one arg', function() {
-      it('must follow where()', function() {
-        assert.throws(function() {
-          mquery().circle('x');
-        }, /must be used after where/);
-        assert.doesNotThrow(function() {
-          mquery().where('loc').circle({center:[0,0], radius: 3 });
-        });
-      });
-      it('works', function() {
-        var m = mquery().where('loc').circle({center:[0,0], radius: 3 });
-        assert.deepEqual(m._conditions, { loc: { $geoWithin: {$center: [[0,0],3] }}});
-      });
-    });
-    describe('with 3 args', function() {
-      it('throws', function() {
-        assert.throws(function() {
-          mquery().where('loc').circle(1,2,3);
-        }, /Invalid argument/);
-      });
-    });
-    describe('requires radius and center', function() {
-      assert.throws(function() {
-        mquery().circle('loc', { center: 1 });
-      }, /center and radius are required/);
-      assert.throws(function() {
-        mquery().circle('loc', { radius: 1 });
-      }, /center and radius are required/);
-      assert.doesNotThrow(function() {
-        mquery().circle('loc', { center: [1,2], radius: 1 });
-      });
-    });
-  });
-
-  describe('geometry', function() {
-    // within + intersects
-    var point = { type: 'Point', coordinates: [[0,0],[1,1]] };
-
-    it('must be called after within or intersects', function(done) {
-      assert.throws(function() {
-        mquery().where('a').geometry(point);
-      }, /must come after/);
-
-      assert.doesNotThrow(function() {
-        mquery().where('a').within().geometry(point);
-      });
-
-      assert.doesNotThrow(function() {
-        mquery().where('a').intersects().geometry(point);
-      });
-
-      done();
-    });
-
-    describe('when called with one argument', function() {
-      describe('after within()', function() {
-        it('and arg quacks like geoJSON', function(done) {
-          var m = mquery().where('a').within().geometry(point);
-          assert.deepEqual({ a: { $geoWithin: { $geometry: point }}}, m._conditions);
-          done();
-        });
-      });
-
-      describe('after intersects()', function() {
-        it('and arg quacks like geoJSON', function(done) {
-          var m = mquery().where('a').intersects().geometry(point);
-          assert.deepEqual({ a: { $geoIntersects: { $geometry: point }}}, m._conditions);
-          done();
-        });
-      });
-
-      it('and arg does not quack like geoJSON', function(done) {
-        assert.throws(function() {
-          mquery().where('b').within().geometry({type:1, coordinates:2});
-        }, /Invalid argument/);
-        done();
-      });
-    });
-
-    describe('when called with zero arguments', function() {
-      it('throws', function(done) {
-        assert.throws(function() {
-          mquery().where('a').within().geometry();
-        }, /Invalid argument/);
-
-        done();
-      });
-    });
-
-    describe('when called with more than one arguments', function() {
-      it('throws', function(done) {
-        assert.throws(function() {
-          mquery().where('a').within().geometry({type:'a',coordinates:[]}, 2);
-        }, /Invalid argument/);
-        done();
-      });
-    });
-  });
-
-  describe('intersects', function() {
-    it('must be used after where()', function(done) {
-      var m = mquery();
-      assert.throws(function() {
-        m.intersects();
-      }, /must be used after where/);
-      done();
-    });
-
-    it('sets geo comparison to "$intersects"', function(done) {
-      var n = mquery().where('a').intersects();
-      assert.equal('$geoIntersects', n._geoComparison);
-      done();
-    });
-
-    it('is chainable', function() {
-      var m = mquery();
-      assert.equal(m.where('a').intersects(), m);
-    });
-
-    it('calls geometry if argument quacks like geojson', function(done) {
-      var m = mquery();
-      var o = { type: 'LineString', coordinates: [[0,1],[3,40]] };
-      var ran = false;
-
-      m.geometry = function(arg) {
-        ran = true;
-        assert.deepEqual(o, arg);
-      };
-
-      m.where('a').intersects(o);
-      assert.ok(ran);
-
-      done();
-    });
-
-    it('throws if argument is not geometry-like', function(done) {
-      var m = mquery().where('a');
-
-      assert.throws(function() {
-        m.intersects(null);
-      }, /Invalid argument/);
-
-      assert.throws(function() {
-        m.intersects(undefined);
-      }, /Invalid argument/);
-
-      assert.throws(function() {
-        m.intersects(false);
-      }, /Invalid argument/);
-
-      assert.throws(function() {
-        m.intersects({});
-      }, /Invalid argument/);
-
-      assert.throws(function() {
-        m.intersects([]);
-      }, /Invalid argument/);
-
-      assert.throws(function() {
-        m.intersects(function() {});
-      }, /Invalid argument/);
-
-      assert.throws(function() {
-        m.intersects(NaN);
-      }, /Invalid argument/);
-
-      done();
-    });
-  });
-
-  describe('near', function() {
-    // near nearSphere
-    describe('with 0 args', function() {
-      it('is compatible with geometry()', function(done) {
-        var q = mquery().where('x').near().geometry({ type: 'Point', coordinates: [180, 11] });
-        assert.deepEqual({ $near: {$geometry: {type:'Point', coordinates: [180,11]}}}, q._conditions.x);
-        done();
-      });
-    });
-
-    describe('with 1 arg', function() {
-      it('throws if not used after where()', function() {
-        assert.throws(function() {
-          mquery().near(1);
-        }, /must be used after where/);
-      });
-      it('does not throw if used after where()', function() {
-        assert.doesNotThrow(function() {
-          mquery().where('loc').near({center:[1,1]});
-        });
-      });
-    });
-    describe('with > 2 args', function() {
-      it('throws', function() {
-        assert.throws(function() {
-          mquery().near(1,2,3);
-        }, /Invalid argument/);
-      });
-    });
-
-    it('creates $geometry args for GeoJSON', function() {
-      var m = mquery().where('loc').near({ center: { type: 'Point', coordinates: [10,10] }});
-      assert.deepEqual({ $near: {$geometry: {type:'Point', coordinates: [10,10]}}}, m._conditions.loc);
-    });
-
-    it('expects `center`', function() {
-      assert.throws(function() {
-        mquery().near('loc', { maxDistance: 3 });
-      }, /center is required/);
-      assert.doesNotThrow(function() {
-        mquery().near('loc', { center: [3,4] });
-      });
-    });
-
-    it('accepts spherical conditions', function() {
-      var m = mquery().where('loc').near({ center: [1,2], spherical: true });
-      assert.deepEqual(m._conditions, { loc: { $nearSphere: [1,2]}});
-    });
-
-    it('is non-spherical by default', function() {
-      var m = mquery().where('loc').near({ center: [1,2] });
-      assert.deepEqual(m._conditions, { loc: { $near: [1,2]}});
-    });
-
-    it('supports maxDistance', function() {
-      var m = mquery().where('loc').near({ center: [1,2], maxDistance:4 });
-      assert.deepEqual(m._conditions, { loc: { $near: [1,2], $maxDistance: 4}});
-    });
-
-    it('supports minDistance', function() {
-      var m = mquery().where('loc').near({ center: [1,2], minDistance:4 });
-      assert.deepEqual(m._conditions, { loc: { $near: [1,2], $minDistance: 4}});
-    });
-
-    it('is chainable', function() {
-      var m = mquery().where('loc').near({ center: [1,2], maxDistance:4 }).find({ x: 1 });
-      assert.deepEqual(m._conditions, { loc: { $near: [1,2], $maxDistance: 4}, x: 1});
-    });
-
-    describe('supports passing GeoJSON, gh-13', function() {
-      it('with center', function() {
-        var m = mquery().where('loc').near({
-          center: { type: 'Point', coordinates: [1,1] },
-          maxDistance: 2
-        });
-
-        var expect = {
-          loc: {
-            $near: {
-              $geometry: {
-                type: 'Point',
-                coordinates : [1,1]
-              },
-              $maxDistance : 2
-            }
-          }
-        };
-
-        assert.deepEqual(m._conditions, expect);
-      });
-    });
-  });
-
-  // fields
-
-  describe('select', function() {
-    describe('with 0 args', function() {
-      it('is chainable', function() {
-        var m = mquery();
-        assert.equal(m, m.select());
-      });
-    });
-
-    it('accepts an object', function() {
-      var o = { x: 1, y: 1 };
-      var m = mquery().select(o);
-      assert.deepEqual(m._fields, o);
-    });
-
-    it('accepts a string', function() {
-      var o = 'x -y';
-      var m = mquery().select(o);
-      assert.deepEqual(m._fields, { x: 1, y: 0 });
-    });
-
-    it('does accept an array', function() {
-      var o = ['x', '-y'];
-      var m = mquery().select(o);
-      assert.deepEqual(m._fields, { x: 1, y: 0 });
-    });
-
-    it('merges previous arguments', function() {
-      var o = { x: 1, y: 0, a: 1 };
-      var m = mquery().select(o);
-      m.select('z -u w').select({ x: 0 });
-      assert.deepEqual(m._fields, {
-        x: 0,
-        y: 0,
-        z: 1,
-        u: 0,
-        w: 1,
-        a: 1
-      });
-    });
-
-    it('rejects non-string, object, arrays', function() {
-      assert.throws(function() {
-        mquery().select(function() {});
-      }, /Invalid select\(\) argument/);
-    });
-
-    it('accepts arguments objects', function() {
-      var m = mquery();
-      function t() {
-        m.select(arguments);
-        assert.deepEqual(m._fields, { x: 1, y: 0 });
-      }
-      t('x', '-y');
-    });
-
-    noDistinct('select');
-  });
-
-  describe('selected', function() {
-    it('returns true when fields have been selected', function(done) {
-      var m;
-
-      m = mquery().select({ name: 1 });
-      assert.ok(m.selected());
-
-      m = mquery().select('name');
-      assert.ok(m.selected());
-
-      done();
-    });
-
-    it('returns false when no fields have been selected', function(done) {
-      var m = mquery();
-      assert.strictEqual(false, m.selected());
-      done();
-    });
-  });
-
-  describe('selectedInclusively', function() {
-    describe('returns false', function() {
-      it('when no fields have been selected', function(done) {
-        assert.strictEqual(false, mquery().selectedInclusively());
-        assert.equal(false, mquery().select({}).selectedInclusively());
-        done();
-      });
-      it('when any fields have been excluded', function(done) {
-        assert.strictEqual(false, mquery().select('-name').selectedInclusively());
-        assert.strictEqual(false, mquery().select({ name: 0 }).selectedInclusively());
-        assert.strictEqual(false, mquery().select('name bio -_id').selectedInclusively());
-        assert.strictEqual(false, mquery().select({ name: 1, _id: 0 }).selectedInclusively());
-        done();
-      });
-      it('when using $meta', function(done) {
-        assert.strictEqual(false, mquery().select({ name: { $meta: 'textScore' } }).selectedInclusively());
-        done();
-      });
-    });
-
-    describe('returns true', function() {
-      it('when fields have been included', function(done) {
-        assert.equal(true, mquery().select('name').selectedInclusively());
-        assert.equal(true, mquery().select({ name:1 }).selectedInclusively());
-        done();
-      });
-    });
-  });
-
-  describe('selectedExclusively', function() {
-    describe('returns false', function() {
-      it('when no fields have been selected', function(done) {
-        assert.equal(false, mquery().selectedExclusively());
-        assert.equal(false, mquery().select({}).selectedExclusively());
-        done();
-      });
-      it('when fields have only been included', function(done) {
-        assert.equal(false, mquery().select('name').selectedExclusively());
-        assert.equal(false, mquery().select({ name: 1 }).selectedExclusively());
-        done();
-      });
-    });
-
-    describe('returns true', function() {
-      it('when any field has been excluded', function(done) {
-        assert.equal(true, mquery().select('-name').selectedExclusively());
-        assert.equal(true, mquery().select({ name:0 }).selectedExclusively());
-        assert.equal(true, mquery().select('-_id').selectedExclusively());
-        assert.strictEqual(true, mquery().select('name bio -_id').selectedExclusively());
-        assert.strictEqual(true, mquery().select({ name: 1, _id: 0 }).selectedExclusively());
-        done();
-      });
-    });
-  });
-
-  describe('slice', function() {
-    describe('with 0 args', function() {
-      it('is chainable', function() {
-        var m = mquery();
-        assert.equal(m, m.slice());
-      });
-      it('is a noop', function() {
-        var m = mquery().slice();
-        assert.deepEqual(m._fields, undefined);
-      });
-    });
-
-    describe('with 1 arg', function() {
-      it('throws if not called after where()', function() {
-        assert.throws(function() {
-          mquery().slice(1);
-        }, /must be used after where/);
-        assert.doesNotThrow(function() {
-          mquery().where('a').slice(1);
-        });
-      });
-      it('that is a number', function() {
-        var query = mquery();
-        query.where('collection').slice(5);
-        assert.deepEqual(query._fields, {collection: {$slice: 5}});
-      });
-      it('that is an array', function() {
-        var query = mquery();
-        query.where('collection').slice([5,10]);
-        assert.deepEqual(query._fields, {collection: {$slice: [5,10]}});
-      });
-      it('that is an object', function() {
-        var query = mquery();
-        query.slice({ collection: [5, 10] });
-        assert.deepEqual(query._fields, {collection: {$slice: [5,10]}});
-      });
-    });
-
-    describe('with 2 args', function() {
-      describe('and first is a number', function() {
-        it('throws if not called after where', function() {
-          assert.throws(function() {
-            mquery().slice(2,3);
-          }, /must be used after where/);
-        });
-        it('does not throw if used after where', function() {
-          var query = mquery();
-          query.where('collection').slice(2,3);
-          assert.deepEqual(query._fields, {collection: {$slice: [2,3]}});
-        });
-      });
-      it('and first is not a number', function() {
-        var query = mquery().slice('collection', [-5, 2]);
-        assert.deepEqual(query._fields, {collection: {$slice: [-5,2]}});
-      });
-    });
-
-    describe('with 3 args', function() {
-      it('works', function() {
-        var query = mquery();
-        query.slice('collection', 14, 10);
-        assert.deepEqual(query._fields, {collection: {$slice: [14, 10]}});
-      });
-    });
-
-    noDistinct('slice');
-    no('count', 'slice');
-  });
-
-  // options
-
-  describe('sort', function() {
-    describe('with 0 args', function() {
-      it('chains', function() {
-        var m = mquery();
-        assert.equal(m, m.sort());
-      });
-      it('has no affect', function() {
-        var m = mquery();
-        assert.equal(m.options.sort, undefined);
-      });
-    });
-
-    it('works', function() {
-      var query = mquery();
-      query.sort('a -c b');
-      assert.deepEqual(query.options.sort, { a : 1, b: 1, c : -1});
-
-      query = mquery();
-      query.sort({'a': 1, 'c': -1, 'b': 'asc', e: 'descending', f: 'ascending'});
-      assert.deepEqual(query.options.sort, {'a': 1, 'c': -1, 'b': 1, 'e': -1, 'f': 1});
-
-      query = mquery();
-      query.sort([['a', -1], ['c', 1], ['b', 'desc'], ['e', 'ascending'], ['f', 'descending']]);
-      assert.deepEqual(query.options.sort, [['a', -1], ['c', 1], ['b', -1], ['e', 1], ['f', -1]]);
-
-      query = mquery();
-      var e = undefined;
-      try {
-        query.sort([['a', 1], { 'b': 5 }]);
-      } catch (err) {
-        e = err;
-      }
-      assert.ok(e, 'uh oh. no error was thrown');
-      assert.equal(e.message, 'Invalid sort() argument, must be array of arrays');
-
-      query = mquery();
-      e = undefined;
-
-      try {
-        query.sort('a', 1, 'c', -1, 'b', 1);
-      } catch (err) {
-        e = err;
-      }
-      assert.ok(e, 'uh oh. no error was thrown');
-      assert.equal(e.message, 'Invalid sort() argument. Must be a string, object, or array.');
-    });
-
-    it('handles $meta sort options', function() {
-      var query = mquery();
-      query.sort({ score: { $meta : 'textScore' } });
-      assert.deepEqual(query.options.sort, { score : { $meta : 'textScore' } });
-    });
-
-    it('array syntax', function() {
-      var query = mquery();
-      query.sort([['field', 1], ['test', -1]]);
-      assert.deepEqual(query.options.sort, [['field', 1], ['test', -1]]);
-    });
-
-    it('throws with mixed array/object syntax', function() {
-      var query = mquery();
-      assert.throws(function() {
-        query.sort({ field: 1 }).sort([['test', -1]]);
-      }, /Can't mix sort syntaxes/);
-      assert.throws(function() {
-        query.sort([['field', 1]]).sort({ test: 1 });
-      }, /Can't mix sort syntaxes/);
-    });
-
-    it('works with maps', function() {
-      if (typeof Map === 'undefined') {
-        return this.skip();
-      }
-      var query = mquery();
-      query.sort(new Map().set('field', 1).set('test', -1));
-      assert.deepEqual(query.options.sort, new Map().set('field', 1).set('test', -1));
-    });
-  });
-
-  function simpleOption(type, options) {
-    describe(type, function() {
-      it('sets the ' + type + ' option', function() {
-        var m = mquery()[type](2);
-        var optionName = options.name || type;
-        assert.equal(2, m.options[optionName]);
-      });
-      it('is chainable', function() {
-        var m = mquery();
-        assert.equal(m[type](3), m);
-      });
-
-      if (!options.distinct) noDistinct(type);
-      if (!options.count) no('count', type);
-    });
-  }
-
-  var negated = {
-    limit: {distinct: false, count: true},
-    skip: {distinct: false, count: true},
-    maxScan: {distinct: false, count: false},
-    batchSize: {distinct: false, count: false},
-    maxTime: {distinct: true, count: true, name: 'maxTimeMS' },
-    comment: {distinct: false, count: false}
-  };
-  Object.keys(negated).forEach(function(key) {
-    simpleOption(key, negated[key]);
-  });
-
-  describe('snapshot', function() {
-    it('works', function() {
-      var query;
-
-      query = mquery();
-      query.snapshot();
-      assert.equal(true, query.options.snapshot);
-
-      query = mquery();
-      query.snapshot(true);
-      assert.equal(true, query.options.snapshot);
-
-      query = mquery();
-      query.snapshot(false);
-      assert.equal(false, query.options.snapshot);
-    });
-    noDistinct('snapshot');
-    no('count', 'snapshot');
-  });
-
-  describe('hint', function() {
-    it('accepts an object', function() {
-      var query2 = mquery();
-      query2.hint({'a': 1, 'b': -1});
-      assert.deepEqual(query2.options.hint, {'a': 1, 'b': -1});
-    });
-
-    it('accepts a string', function() {
-      var query2 = mquery();
-      query2.hint('a');
-      assert.deepEqual(query2.options.hint, 'a');
-    });
-
-    it('rejects everything else', function() {
-      assert.throws(function() {
-        mquery().hint(['c']);
-      }, /Invalid hint./);
-      assert.throws(function() {
-        mquery().hint(1);
-      }, /Invalid hint./);
-    });
-
-    describe('does not have side affects', function() {
-      it('on invalid arg', function() {
-        var m = mquery();
-        try {
-          m.hint(1);
-        } catch (err) {
-          // ignore
-        }
-        assert.equal(undefined, m.options.hint);
-      });
-      it('on missing arg', function() {
-        var m = mquery().hint();
-        assert.equal(undefined, m.options.hint);
-      });
-    });
-
-    noDistinct('hint');
-  });
-
-  describe('j', function() {
-    it('works', function() {
-      var m = mquery().j(true);
-      assert.equal(true, m.options.j);
-    });
-  });
-
-  describe('slaveOk', function() {
-    it('works', function() {
-      var query;
-
-      query = mquery();
-      query.slaveOk();
-      assert.equal(true, query.options.slaveOk);
-
-      query = mquery();
-      query.slaveOk(true);
-      assert.equal(true, query.options.slaveOk);
-
-      query = mquery();
-      query.slaveOk(false);
-      assert.equal(false, query.options.slaveOk);
-    });
-  });
-
-  describe('read', function() {
-    it('sets associated readPreference option', function() {
-      var m = mquery();
-      m.read('p');
-      assert.equal('primary', m.options.readPreference);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      assert.equal(m, m.read('sp'));
-    });
-  });
-
-  describe('readConcern', function() {
-    it('sets associated readConcern option', function() {
-      var m;
-
-      m = mquery();
-      m.readConcern('s');
-      assert.deepEqual({ level: 'snapshot' }, m.options.readConcern);
-
-      m = mquery();
-      m.r('local');
-      assert.deepEqual({ level: 'local' }, m.options.readConcern);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      assert.equal(m, m.readConcern('lz'));
-    });
-  });
-
-  describe('tailable', function() {
-    it('works', function() {
-      var query;
-
-      query = mquery();
-      query.tailable();
-      assert.equal(true, query.options.tailable);
-
-      query = mquery();
-      query.tailable(true);
-      assert.equal(true, query.options.tailable);
-
-      query = mquery();
-      query.tailable(false);
-      assert.equal(false, query.options.tailable);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      assert.equal(m, m.tailable());
-    });
-    noDistinct('tailable');
-    no('count', 'tailable');
-  });
-
-  describe('writeConcern', function() {
-    it('sets associated writeConcern option', function() {
-      var m;
-      m = mquery();
-      m.writeConcern('majority');
-      assert.equal('majority', m.options.w);
-
-      m = mquery();
-      m.writeConcern('m'); // m is alias of majority
-      assert.equal('majority', m.options.w);
-
-      m = mquery();
-      m.writeConcern(1);
-      assert.equal(1, m.options.w);
-    });
-    it('accepts object', function() {
-      var m;
-
-      m = mquery().writeConcern({ w: 'm', j: true, wtimeout: 1000 });
-      assert.equal('m', m.options.w); // check it does not convert m to majority
-      assert.equal(true, m.options.j);
-      assert.equal(1000, m.options.wtimeout);
-
-      m = mquery().w('m').w({j: false, wtimeout: 0 });
-      assert.equal('majority', m.options.w);
-      assert.strictEqual(false, m.options.j);
-      assert.strictEqual(0, m.options.wtimeout);
-    });
-    it('is chainable', function() {
-      var m = mquery();
-      assert.equal(m, m.writeConcern('majority'));
-    });
-  });
-
-  // query utilities
-
-  describe('merge', function() {
-    describe('with falsy arg', function() {
-      it('returns itself', function() {
-        var m = mquery();
-        assert.equal(m, m.merge());
-        assert.equal(m, m.merge(null));
-        assert.equal(m, m.merge(0));
-      });
-    });
-    describe('with an argument', function() {
-      describe('that is not a query or plain object', function() {
-        it('throws', function() {
-          assert.throws(function() {
-            mquery().merge([]);
-          }, /Invalid argument/);
-          assert.throws(function() {
-            mquery().merge('merge');
-          }, /Invalid argument/);
-          assert.doesNotThrow(function() {
-            mquery().merge({});
-          }, /Invalid argument/);
-        });
-      });
-
-      describe('that is a query', function() {
-        it('merges conditions, field selection, and options', function() {
-          var m = mquery({ x: 'hi' }, { select: 'x y', another: true });
-          var n = mquery().merge(m);
-          assert.deepEqual(n._conditions, m._conditions);
-          assert.deepEqual(n._fields, m._fields);
-          assert.deepEqual(n.options, m.options);
-        });
-        it('clones update arguments', function(done) {
-          var original = { $set: { iTerm: true }};
-          var m = mquery().update(original);
-          var n = mquery().merge(m);
-          m.update({ $set: { x: 2 }});
-          assert.notDeepEqual(m._update, n._update);
-          done();
-        });
-        it('is chainable', function() {
-          var m = mquery({ x: 'hi' });
-          var n = mquery();
-          assert.equal(n, n.merge(m));
-        });
-      });
-
-      describe('that is an object', function() {
-        it('merges', function() {
-          var m = { x: 'hi' };
-          var n = mquery().merge(m);
-          assert.deepEqual(n._conditions, { x: 'hi' });
-        });
-        it('clones update arguments', function(done) {
-          var original = { $set: { iTerm: true }};
-          var m = mquery().update(original);
-          var n = mquery().merge(original);
-          m.update({ $set: { x: 2 }});
-          assert.notDeepEqual(m._update, n._update);
-          done();
-        });
-        it('is chainable', function() {
-          var m = { x: 'hi' };
-          var n = mquery();
-          assert.equal(n, n.merge(m));
-        });
-      });
-    });
-  });
-
-  // queries
-
-  describe('find', function() {
-    describe('with no callback', function() {
-      it('does not execute', function() {
-        var m = mquery();
-        assert.doesNotThrow(function() {
-          m.find();
-        });
-        assert.doesNotThrow(function() {
-          m.find({ x: 1 });
-        });
-      });
-    });
-
-    it('is chainable', function() {
-      var m = mquery().find({ x: 1 }).find().find({ y: 2 });
-      assert.deepEqual(m._conditions, {x:1,y:2});
-    });
-
-    it('merges other queries', function() {
-      var m = mquery({ name: 'mquery' });
-      m.tailable();
-      m.select('_id');
-      var a = mquery().find(m);
-      assert.deepEqual(a._conditions, m._conditions);
-      assert.deepEqual(a.options, m.options);
-      assert.deepEqual(a._fields, m._fields);
-    });
-
-    describe('executes', function() {
-      before(function(done) {
-        col.insert({ name: 'mquery' }, { safe: true }, done);
-      });
-
-      after(function(done) {
-        col.remove({ name: 'mquery' }, done);
-      });
-
-      it('when criteria is passed with a callback', function(done) {
-        mquery(col).find({ name: 'mquery' }, function(err, docs) {
-          assert.ifError(err);
-          assert.equal(1, docs.length);
-          done();
-        });
-      });
-      it('when Query is passed with a callback', function(done) {
-        var m = mquery({ name: 'mquery' });
-        mquery(col).find(m, function(err, docs) {
-          assert.ifError(err);
-          assert.equal(1, docs.length);
-          done();
-        });
-      });
-      it('when just a callback is passed', function(done) {
-        mquery({ name: 'mquery' }).collection(col).find(function(err, docs) {
-          assert.ifError(err);
-          assert.equal(1, docs.length);
-          done();
-        });
-      });
-    });
-  });
-
-  describe('findOne', function() {
-    describe('with no callback', function() {
-      it('does not execute', function() {
-        var m = mquery();
-        assert.doesNotThrow(function() {
-          m.findOne();
-        });
-        assert.doesNotThrow(function() {
-          m.findOne({ x: 1 });
-        });
-      });
-    });
-
-    it('is chainable', function() {
-      var m = mquery();
-      var n = m.findOne({ x: 1 }).findOne().findOne({ y: 2 });
-      assert.equal(m, n);
-      assert.deepEqual(m._conditions, {x:1,y:2});
-      assert.equal('findOne', m.op);
-    });
-
-    it('merges other queries', function() {
-      var m = mquery({ name: 'mquery' });
-      m.read('nearest');
-      m.select('_id');
-      var a = mquery().findOne(m);
-      assert.deepEqual(a._conditions, m._conditions);
-      assert.deepEqual(a.options, m.options);
-      assert.deepEqual(a._fields, m._fields);
-    });
-
-    describe('executes', function() {
-      before(function(done) {
-        col.insert({ name: 'mquery findone' }, { safe: true }, done);
-      });
-
-      after(function(done) {
-        col.remove({ name: 'mquery findone' }, done);
-      });
-
-      it('when criteria is passed with a callback', function(done) {
-        mquery(col).findOne({ name: 'mquery findone' }, function(err, doc) {
-          assert.ifError(err);
-          assert.ok(doc);
-          assert.equal('mquery findone', doc.name);
-          done();
-        });
-      });
-      it('when Query is passed with a callback', function(done) {
-        var m = mquery(col).where({ name: 'mquery findone' });
-        mquery(col).findOne(m, function(err, doc) {
-          assert.ifError(err);
-          assert.ok(doc);
-          assert.equal('mquery findone', doc.name);
-          done();
-        });
-      });
-      it('when just a callback is passed', function(done) {
-        mquery({ name: 'mquery findone' }).collection(col).findOne(function(err, doc) {
-          assert.ifError(err);
-          assert.ok(doc);
-          assert.equal('mquery findone', doc.name);
-          done();
-        });
-      });
-    });
-  });
-
-  describe('count', function() {
-    describe('with no callback', function() {
-      it('does not execute', function() {
-        var m = mquery();
-        assert.doesNotThrow(function() {
-          m.count();
-        });
-        assert.doesNotThrow(function() {
-          m.count({ x: 1 });
-        });
-      });
-    });
-
-    it('is chainable', function() {
-      var m = mquery();
-      var n = m.count({ x: 1 }).count().count({ y: 2 });
-      assert.equal(m, n);
-      assert.deepEqual(m._conditions, {x:1,y:2});
-      assert.equal('count', m.op);
-    });
-
-    it('merges other queries', function() {
-      var m = mquery({ name: 'mquery' });
-      m.read('nearest');
-      m.select('_id');
-      var a = mquery().count(m);
-      assert.deepEqual(a._conditions, m._conditions);
-      assert.deepEqual(a.options, m.options);
-      assert.deepEqual(a._fields, m._fields);
-    });
-
-    describe('executes', function() {
-      before(function(done) {
-        col.insert({ name: 'mquery count' }, { safe: true }, done);
-      });
-
-      after(function(done) {
-        col.remove({ name: 'mquery count' }, done);
-      });
-
-      it('when criteria is passed with a callback', function(done) {
-        mquery(col).count({ name: 'mquery count' }, function(err, count) {
-          assert.ifError(err);
-          assert.ok(count);
-          assert.ok(1 === count);
-          done();
-        });
-      });
-      it('when Query is passed with a callback', function(done) {
-        var m = mquery({ name: 'mquery count' });
-        mquery(col).count(m, function(err, count) {
-          assert.ifError(err);
-          assert.ok(count);
-          assert.ok(1 === count);
-          done();
-        });
-      });
-      it('when just a callback is passed', function(done) {
-        mquery({ name: 'mquery count' }).collection(col).count(function(err, count) {
-          assert.ifError(err);
-          assert.ok(1 === count);
-          done();
-        });
-      });
-    });
-
-    describe('validates its option', function() {
-      it('sort', function(done) {
-        assert.doesNotThrow(function() {
-          mquery().sort('x').count();
-        });
-        done();
-      });
-
-      it('select', function(done) {
-        assert.throws(function() {
-          mquery().select('x').count();
-        }, /field selection and slice cannot be used with count/);
-        done();
-      });
-
-      it('slice', function(done) {
-        assert.throws(function() {
-          mquery().where('x').slice(-3).count();
-        }, /field selection and slice cannot be used with count/);
-        done();
-      });
-
-      it('limit', function(done) {
-        assert.doesNotThrow(function() {
-          mquery().limit(3).count();
-        });
-        done();
-      });
-
-      it('skip', function(done) {
-        assert.doesNotThrow(function() {
-          mquery().skip(3).count();
-        });
-        done();
-      });
-
-      it('batchSize', function(done) {
-        assert.throws(function() {
-          mquery({}, { batchSize: 3 }).count();
-        }, /batchSize cannot be used with count/);
-        done();
-      });
-
-      it('comment', function(done) {
-        assert.throws(function() {
-          mquery().comment('mquery').count();
-        }, /comment cannot be used with count/);
-        done();
-      });
-
-      it('maxScan', function(done) {
-        assert.throws(function() {
-          mquery().maxScan(300).count();
-        }, /maxScan cannot be used with count/);
-        done();
-      });
-
-      it('snapshot', function(done) {
-        assert.throws(function() {
-          mquery().snapshot().count();
-        }, /snapshot cannot be used with count/);
-        done();
-      });
-
-      it('tailable', function(done) {
-        assert.throws(function() {
-          mquery().tailable().count();
-        }, /tailable cannot be used with count/);
-        done();
-      });
-    });
-  });
-
-  describe('distinct', function() {
-    describe('with no callback', function() {
-      it('does not execute', function() {
-        var m = mquery();
-        assert.doesNotThrow(function() {
-          m.distinct();
-        });
-        assert.doesNotThrow(function() {
-          m.distinct('name');
-        });
-        assert.doesNotThrow(function() {
-          m.distinct({ name: 'mquery distinct' });
-        });
-        assert.doesNotThrow(function() {
-          m.distinct({ name: 'mquery distinct' }, 'name');
-        });
-      });
-    });
-
-    it('is chainable', function() {
-      var m = mquery({x:1}).distinct('name');
-      var n = m.distinct({y:2});
-      assert.equal(m, n);
-      assert.deepEqual(n._conditions, {x:1, y:2});
-      assert.equal('name', n._distinct);
-      assert.equal('distinct', n.op);
-    });
-
-    it('overwrites field', function() {
-      var m = mquery({ name: 'mquery' }).distinct('name');
-      m.distinct('rename');
-      assert.equal(m._distinct, 'rename');
-      m.distinct({x:1}, 'renamed');
-      assert.equal(m._distinct, 'renamed');
-    });
-
-    it('merges other queries', function() {
-      var m = mquery().distinct({ name: 'mquery' }, 'age');
-      m.read('nearest');
-      var a = mquery().distinct(m);
-      assert.deepEqual(a._conditions, m._conditions);
-      assert.deepEqual(a.options, m.options);
-      assert.deepEqual(a._fields, m._fields);
-      assert.deepEqual(a._distinct, m._distinct);
-    });
-
-    describe('executes', function() {
-      before(function(done) {
-        col.insert({ name: 'mquery distinct', age: 1 }, { safe: true }, done);
-      });
-
-      after(function(done) {
-        col.remove({ name: 'mquery distinct' }, done);
-      });
-
-      it('when distinct arg is passed with a callback', function(done) {
-        mquery(col).distinct('distinct', function(err, doc) {
-          assert.ifError(err);
-          assert.ok(doc);
-          done();
-        });
-      });
-      describe('when criteria is passed with a callback', function() {
-        it('if distinct arg was declared', function(done) {
-          mquery(col).distinct('age').distinct({ name: 'mquery distinct' }, function(err, doc) {
-            assert.ifError(err);
-            assert.ok(doc);
-            done();
-          });
-        });
-        it('but not if distinct arg was not declared', function() {
-          assert.throws(function() {
-            mquery(col).distinct({ name: 'mquery distinct' }, function() {});
-          }, /No value for `distinct`/);
-        });
-      });
-      describe('when Query is passed with a callback', function() {
-        var m = mquery({ name: 'mquery distinct' });
-        it('if distinct arg was declared', function(done) {
-          mquery(col).distinct('age').distinct(m, function(err, doc) {
-            assert.ifError(err);
-            assert.ok(doc);
-            done();
-          });
-        });
-        it('but not if distinct arg was not declared', function() {
-          assert.throws(function() {
-            mquery(col).distinct(m, function() {});
-          }, /No value for `distinct`/);
-        });
-      });
-      describe('when just a callback is passed', function() {
-        it('if distinct arg was declared', function(done) {
-          var m = mquery({ name: 'mquery distinct' });
-          m.collection(col);
-          m.distinct('age');
-          m.distinct(function(err, doc) {
-            assert.ifError(err);
-            assert.ok(doc);
-            done();
-          });
-        });
-        it('but not if no distinct arg was declared', function() {
-          var m = mquery();
-          m.collection(col);
-          assert.throws(function() {
-            m.distinct(function() {});
-          }, /No value for `distinct`/);
-        });
-      });
-    });
-
-    describe('validates its option', function() {
-      it('sort', function(done) {
-        assert.throws(function() {
-          mquery().sort('x').distinct();
-        }, /sort cannot be used with distinct/);
-        done();
-      });
-
-      it('select', function(done) {
-        assert.throws(function() {
-          mquery().select('x').distinct();
-        }, /field selection and slice cannot be used with distinct/);
-        done();
-      });
-
-      it('slice', function(done) {
-        assert.throws(function() {
-          mquery().where('x').slice(-3).distinct();
-        }, /field selection and slice cannot be used with distinct/);
-        done();
-      });
-
-      it('limit', function(done) {
-        assert.throws(function() {
-          mquery().limit(3).distinct();
-        }, /limit cannot be used with distinct/);
-        done();
-      });
-
-      it('skip', function(done) {
-        assert.throws(function() {
-          mquery().skip(3).distinct();
-        }, /skip cannot be used with distinct/);
-        done();
-      });
-
-      it('batchSize', function(done) {
-        assert.throws(function() {
-          mquery({}, { batchSize: 3 }).distinct();
-        }, /batchSize cannot be used with distinct/);
-        done();
-      });
-
-      it('comment', function(done) {
-        assert.throws(function() {
-          mquery().comment('mquery').distinct();
-        }, /comment cannot be used with distinct/);
-        done();
-      });
-
-      it('maxScan', function(done) {
-        assert.throws(function() {
-          mquery().maxScan(300).distinct();
-        }, /maxScan cannot be used with distinct/);
-        done();
-      });
-
-      it('snapshot', function(done) {
-        assert.throws(function() {
-          mquery().snapshot().distinct();
-        }, /snapshot cannot be used with distinct/);
-        done();
-      });
-
-      it('hint', function(done) {
-        assert.throws(function() {
-          mquery().hint({ x: 1 }).distinct();
-        }, /hint cannot be used with distinct/);
-        done();
-      });
-
-      it('tailable', function(done) {
-        assert.throws(function() {
-          mquery().tailable().distinct();
-        }, /tailable cannot be used with distinct/);
-        done();
-      });
-    });
-  });
-
-  describe('update', function() {
-    describe('with no callback', function() {
-      it('does not execute', function() {
-        var m = mquery();
-        assert.doesNotThrow(function() {
-          m.update({ name: 'old' }, { name: 'updated' }, { multi: true });
-        });
-        assert.doesNotThrow(function() {
-          m.update({ name: 'old' }, { name: 'updated' });
-        });
-        assert.doesNotThrow(function() {
-          m.update({ name: 'updated' });
-        });
-        assert.doesNotThrow(function() {
-          m.update();
-        });
-      });
-    });
-
-    it('is chainable', function() {
-      var m = mquery({x:1}).update({ y: 2 });
-      var n = m.where({y:2});
-      assert.equal(m, n);
-      assert.deepEqual(n._conditions, {x:1, y:2});
-      assert.deepEqual({ y: 2 }, n._update);
-      assert.equal('update', n.op);
-    });
-
-    it('merges update doc arg', function() {
-      var a = [1,2];
-      var m = mquery().where({ name: 'mquery' }).update({ x: 'stuff', a: a });
-      m.update({ z: 'stuff' });
-      assert.deepEqual(m._update, { z: 'stuff', x: 'stuff', a: a });
-      assert.deepEqual(m._conditions, { name: 'mquery' });
-      assert.ok(!m.options.overwrite);
-      m.update({}, { z: 'renamed' }, { overwrite: true });
-      assert.ok(m.options.overwrite === true);
-      assert.deepEqual(m._conditions, { name: 'mquery' });
-      assert.deepEqual(m._update, { z: 'renamed', x: 'stuff', a: a });
-      a.push(3);
-      assert.notDeepEqual(m._update, { z: 'renamed', x: 'stuff', a: a });
-    });
-
-    it('merges other options', function() {
-      var m = mquery();
-      m.setOptions({ overwrite: true });
-      m.update({ age: 77 }, { name: 'pagemill' }, { multi: true });
-      assert.deepEqual({ age: 77 }, m._conditions);
-      assert.deepEqual({ name: 'pagemill' }, m._update);
-      assert.deepEqual({ overwrite: true, multi: true }, m.options);
-    });
-
-    describe('executes', function() {
-      var id;
-      before(function(done) {
-        col.insert({ name: 'mquery update', age: 1 }, { safe: true }, function(err, res) {
-          id = res.insertedIds[0];
-          done();
-        });
-      });
-
-      after(function(done) {
-        col.remove({ _id: id }, done);
-      });
-
-      describe('when conds + doc + opts + callback passed', function() {
-        it('works', function(done) {
-          var m = mquery(col).where({ _id: id });
-          m.update({}, { name: 'Sparky' }, { safe: true }, function(err, res) {
-            assert.ifError(err);
-            assert.equal(res.result.n, 1);
-            m.findOne(function(err, doc) {
-              assert.ifError(err);
-              assert.equal(doc.name, 'Sparky');
-              done();
-            });
-          });
-        });
-      });
-
-      describe('when conds + doc + callback passed', function() {
-        it('works', function(done) {
-          var m = mquery(col).update({ _id: id }, { name: 'fairgrounds' }, function(err, num) {
-            assert.ifError(err);
-            assert.ok(1, num);
-            m.findOne(function(err, doc) {
-              assert.ifError(err);
-              assert.equal(doc.name, 'fairgrounds');
-              done();
-            });
-          });
-        });
-      });
-
-      describe('when doc + callback passed', function() {
-        it('works', function(done) {
-          var m = mquery(col).where({ _id: id }).update({ name: 'changed' }, function(err, num) {
-            assert.ifError(err);
-            assert.ok(1, num);
-            m.findOne(function(err, doc) {
-              assert.ifError(err);
-              assert.equal(doc.name, 'changed');
-              done();
-            });
-          });
-        });
-      });
-
-      describe('when just callback passed', function() {
-        it('works', function(done) {
-          var m = mquery(col).where({ _id: id });
-          m.setOptions({ safe: true });
-          m.update({ name: 'Frankenweenie' });
-          m.update(function(err, res) {
-            assert.ifError(err);
-            assert.equal(res.result.n, 1);
-            m.findOne(function(err, doc) {
-              assert.ifError(err);
-              assert.equal(doc.name, 'Frankenweenie');
-              done();
-            });
-          });
-        });
-      });
-
-      describe('without a callback', function() {
-        it('when forced by exec()', function(done) {
-          var m = mquery(col).where({ _id: id });
-          m.setOptions({ safe: true, multi: true });
-          m.update({ name: 'forced' });
-
-          var update = m._collection.update;
-          m._collection.update = function(conds, doc, opts) {
-            m._collection.update = update;
-
-            assert.ok(opts.safe);
-            assert.ok(true === opts.multi);
-            assert.equal('forced', doc.$set.name);
-            done();
-          };
-
-          m.exec();
-        });
-      });
-
-      describe('except when update doc is empty and missing overwrite flag', function() {
-        it('works', function(done) {
-          var m = mquery(col).where({ _id: id });
-          m.setOptions({ safe: true });
-          m.update({ }, function(err, num) {
-            assert.ifError(err);
-            assert.ok(0 === num);
-            setTimeout(function() {
-              m.findOne(function(err, doc) {
-                assert.ifError(err);
-                assert.equal(3, mquery.utils.keys(doc).length);
-                assert.equal(id, doc._id.toString());
-                assert.equal('Frankenweenie', doc.name);
-                done();
-              });
-            }, 300);
-          });
-        });
-      });
-
-      describe('when update doc is set with overwrite flag', function() {
-        it('works', function(done) {
-          var m = mquery(col).where({ _id: id });
-          m.setOptions({ safe: true, overwrite: true });
-          m.update({ all: 'yep', two: 2 }, function(err, res) {
-            assert.ifError(err);
-            assert.equal(res.result.n, 1);
-            m.findOne(function(err, doc) {
-              assert.ifError(err);
-              assert.equal(3, mquery.utils.keys(doc).length);
-              assert.equal('yep', doc.all);
-              assert.equal(2, doc.two);
-              assert.equal(id, doc._id.toString());
-              done();
-            });
-          });
-        });
-      });
-
-      describe('when update doc is empty with overwrite flag', function() {
-        it('works', function(done) {
-          var m = mquery(col).where({ _id: id });
-          m.setOptions({ safe: true, overwrite: true });
-          m.update({ }, function(err, res) {
-            assert.ifError(err);
-            assert.equal(res.result.n, 1);
-            m.findOne(function(err, doc) {
-              assert.ifError(err);
-              assert.equal(1, mquery.utils.keys(doc).length);
-              assert.equal(id, doc._id.toString());
-              done();
-            });
-          });
-        });
-      });
-
-      describe('when boolean (true) - exec()', function() {
-        it('works', function(done) {
-          var m = mquery(col).where({ _id: id });
-          m.update({ name: 'bool' }).update(true);
-          setTimeout(function() {
-            m.findOne(function(err, doc) {
-              assert.ifError(err);
-              assert.ok(doc);
-              assert.equal('bool', doc.name);
-              done();
-            });
-          }, 300);
-        });
-      });
-    });
-  });
-
-  describe('remove', function() {
-    describe('with 0 args', function() {
-      var name = 'remove: no args test';
-      before(function(done) {
-        col.insert({ name: name }, { safe: true }, done);
-      });
-      after(function(done) {
-        col.remove({ name: name }, { safe: true }, done);
-      });
-
-      it('does not execute', function(done) {
-        var remove = col.remove;
-        col.remove = function() {
-          col.remove = remove;
-          done(new Error('remove executed!'));
-        };
-
-        mquery(col).where({ name: name }).remove();
-        setTimeout(function() {
-          col.remove = remove;
-          done();
-        }, 10);
-      });
-
-      it('chains', function() {
-        var m = mquery();
-        assert.equal(m, m.remove());
-      });
-    });
-
-    describe('with 1 argument', function() {
-      var name = 'remove: 1 arg test';
-      before(function(done) {
-        col.insert({ name: name }, { safe: true }, done);
-      });
-      after(function(done) {
-        col.remove({ name: name }, { safe: true }, done);
-      });
-
-      describe('that is a', function() {
-        it('plain object', function() {
-          var m = mquery(col).remove({ name: 'Whiskers' });
-          m.remove({ color: '#fff' });
-          assert.deepEqual({ name: 'Whiskers', color: '#fff' }, m._conditions);
-        });
-
-        it('query', function() {
-          var q = mquery({ color: '#fff' });
-          var m = mquery(col).remove({ name: 'Whiskers' });
-          m.remove(q);
-          assert.deepEqual({ name: 'Whiskers', color: '#fff' }, m._conditions);
-        });
-
-        it('function', function(done) {
-          mquery(col, { safe: true }).where({name: name}).remove(function(err) {
-            assert.ifError(err);
-            mquery(col).findOne({ name: name }, function(err, doc) {
-              assert.ifError(err);
-              assert.equal(null, doc);
-              done();
-            });
-          });
-        });
-
-        it('boolean (true) - execute', function(done) {
-          col.insert({ name: name }, { safe: true }, function(err) {
-            assert.ifError(err);
-            mquery(col).findOne({ name: name }, function(err, doc) {
-              assert.ifError(err);
-              assert.ok(doc);
-              mquery(col).remove(true);
-              setTimeout(function() {
-                mquery(col).find(function(err, docs) {
-                  assert.ifError(err);
-                  assert.ok(docs);
-                  assert.equal(0, docs.length);
-                  done();
-                });
-              }, 300);
-            });
-          });
-        });
-      });
-    });
-
-    describe('with 2 arguments', function() {
-      var name = 'remove: 2 arg test';
-      beforeEach(function(done) {
-        col.remove({}, { safe: true }, function(err) {
-          assert.ifError(err);
-          col.insert([{ name: 'shelly' }, { name: name }], { safe: true }, function(err) {
-            assert.ifError(err);
-            mquery(col).find(function(err, docs) {
-              assert.ifError(err);
-              assert.equal(2, docs.length);
-              done();
-            });
-          });
-        });
-      });
-
-      describe('plain object + callback', function() {
-        it('works', function(done) {
-          mquery(col).remove({ name: name }, function(err) {
-            assert.ifError(err);
-            mquery(col).find(function(err, docs) {
-              assert.ifError(err);
-              assert.ok(docs);
-              assert.equal(1, docs.length);
-              assert.equal('shelly', docs[0].name);
-              done();
-            });
-          });
-        });
-      });
-
-      describe('mquery + callback', function() {
-        it('works', function(done) {
-          var m = mquery({ name: name });
-          mquery(col).remove(m, function(err) {
-            assert.ifError(err);
-            mquery(col).find(function(err, docs) {
-              assert.ifError(err);
-              assert.ok(docs);
-              assert.equal(1, docs.length);
-              assert.equal('shelly', docs[0].name);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  function validateFindAndModifyOptions(method) {
-    describe('validates its option', function() {
-      it('sort', function(done) {
-        assert.doesNotThrow(function() {
-          mquery().sort('x')[method]();
-        });
-        done();
-      });
-
-      it('select', function(done) {
-        assert.doesNotThrow(function() {
-          mquery().select('x')[method]();
-        });
-        done();
-      });
-
-      it('limit', function(done) {
-        assert.throws(function() {
-          mquery().limit(3)[method]();
-        }, new RegExp('limit cannot be used with ' + method));
-        done();
-      });
-
-      it('skip', function(done) {
-        assert.throws(function() {
-          mquery().skip(3)[method]();
-        }, new RegExp('skip cannot be used with ' + method));
-        done();
-      });
-
-      it('batchSize', function(done) {
-        assert.throws(function() {
-          mquery({}, { batchSize: 3 })[method]();
-        }, new RegExp('batchSize cannot be used with ' + method));
-        done();
-      });
-
-      it('maxScan', function(done) {
-        assert.throws(function() {
-          mquery().maxScan(300)[method]();
-        }, new RegExp('maxScan cannot be used with ' + method));
-        done();
-      });
-
-      it('snapshot', function(done) {
-        assert.throws(function() {
-          mquery().snapshot()[method]();
-        }, new RegExp('snapshot cannot be used with ' + method));
-        done();
-      });
-
-      it('hint', function(done) {
-        assert.throws(function() {
-          mquery().hint({ x: 1 })[method]();
-        }, new RegExp('hint cannot be used with ' + method));
-        done();
-      });
-
-      it('tailable', function(done) {
-        assert.throws(function() {
-          mquery().tailable()[method]();
-        }, new RegExp('tailable cannot be used with ' + method));
-        done();
-      });
-
-      it('comment', function(done) {
-        assert.throws(function() {
-          mquery().comment('mquery')[method]();
-        }, new RegExp('comment cannot be used with ' + method));
-        done();
-      });
-    });
-  }
-
-  describe('findOneAndUpdate', function() {
-    var name = 'findOneAndUpdate + fn';
-
-    validateFindAndModifyOptions('findOneAndUpdate');
-
-    describe('with 0 args', function() {
-      it('makes no changes', function() {
-        var m = mquery();
-        var n = m.findOneAndUpdate();
-        assert.deepEqual(m, n);
-      });
-    });
-    describe('with 1 arg', function() {
-      describe('that is an object', function() {
-        it('updates the doc', function() {
-          var m = mquery();
-          var n = m.findOneAndUpdate({ $set: { name: '1 arg' }});
-          assert.deepEqual(n._update, { $set: { name: '1 arg' }});
-        });
-      });
-      describe('that is a query', function() {
-        it('updates the doc', function() {
-          var m = mquery({ name: name }).update({ x: 1 });
-          var n = mquery().findOneAndUpdate(m);
-          assert.deepEqual(n._update, { x: 1 });
-        });
-      });
-      it('that is a function', function(done) {
-        col.insert({ name: name }, { safe: true }, function(err) {
-          assert.ifError(err);
-          var m = mquery({ name: name }).collection(col);
-          name = '1 arg';
-          var n = m.update({ $set: { name: name }});
-          n.findOneAndUpdate(function(err, res) {
-            assert.ifError(err);
-            assert.ok(res.value);
-            assert.equal(name, res.value.name);
-            done();
-          });
-        });
-      });
-    });
-    describe('with 2 args', function() {
-      it('conditions + update', function() {
-        var m = mquery(col);
-        m.findOneAndUpdate({ name: name }, { age: 100 });
-        assert.deepEqual({ name: name }, m._conditions);
-        assert.deepEqual({ age: 100 }, m._update);
-      });
-      it('query + update', function() {
-        var n = mquery({ name: name });
-        var m = mquery(col);
-        m.findOneAndUpdate(n, { age: 100 });
-        assert.deepEqual({ name: name }, m._conditions);
-        assert.deepEqual({ age: 100 }, m._update);
-      });
-      it('update + callback', function(done) {
-        var m = mquery(col).where({ name: name });
-        m.findOneAndUpdate({}, { $inc: { age: 10 }}, { new: true }, function(err, res) {
-          assert.ifError(err);
-          assert.equal(10, res.value.age);
-          done();
-        });
-      });
-    });
-    describe('with 3 args', function() {
-      it('conditions + update + options', function() {
-        var m = mquery();
-        var n = m.findOneAndUpdate({ name: name }, { works: true }, { new: false });
-        assert.deepEqual({ name: name}, n._conditions);
-        assert.deepEqual({ works: true }, n._update);
-        assert.deepEqual({ new: false }, n.options);
-      });
-      it('conditions + update + callback', function(done) {
-        var m = mquery(col);
-        m.findOneAndUpdate({ name: name }, { works: true }, { new: true }, function(err, res) {
-          assert.ifError(err);
-          assert.ok(res.value);
-          assert.equal(name, res.value.name);
-          assert.ok(true === res.value.works);
-          done();
-        });
-      });
-    });
-    describe('with 4 args', function() {
-      it('conditions + update + options + callback', function(done) {
-        var m = mquery(col);
-        m.findOneAndUpdate({ name: name }, { works: false }, { new: false }, function(err, res) {
-          assert.ifError(err);
-          assert.ok(res.value);
-          assert.equal(name, res.value.name);
-          assert.ok(true === res.value.works);
-          done();
-        });
-      });
-    });
-  });
-
-  describe('findOneAndRemove', function() {
-    var name = 'findOneAndRemove';
-
-    validateFindAndModifyOptions('findOneAndRemove');
-
-    describe('with 0 args', function() {
-      it('makes no changes', function() {
-        var m = mquery();
-        var n = m.findOneAndRemove();
-        assert.deepEqual(m, n);
-      });
-    });
-    describe('with 1 arg', function() {
-      describe('that is an object', function() {
-        it('updates the doc', function() {
-          var m = mquery();
-          var n = m.findOneAndRemove({ name: '1 arg' });
-          assert.deepEqual(n._conditions, { name: '1 arg' });
-        });
-      });
-      describe('that is a query', function() {
-        it('updates the doc', function() {
-          var m = mquery({ name: name });
-          var n = m.findOneAndRemove(m);
-          assert.deepEqual(n._conditions, { name: name });
-        });
-      });
-      it('that is a function', function(done) {
-        col.insert({ name: name }, { safe: true }, function(err) {
-          assert.ifError(err);
-          var m = mquery({ name: name }).collection(col);
-          m.findOneAndRemove(function(err, res) {
-            assert.ifError(err);
-            assert.ok(res.value);
-            assert.equal(name, res.value.name);
-            done();
-          });
-        });
-      });
-    });
-    describe('with 2 args', function() {
-      it('conditions + options', function() {
-        var m = mquery(col);
-        m.findOneAndRemove({ name: name }, { new: false });
-        assert.deepEqual({ name: name }, m._conditions);
-        assert.deepEqual({ new: false }, m.options);
-      });
-      it('query + options', function() {
-        var n = mquery({ name: name });
-        var m = mquery(col);
-        m.findOneAndRemove(n, { sort: { x: 1 }});
-        assert.deepEqual({ name: name }, m._conditions);
-        assert.deepEqual({ sort: { 'x': 1 }}, m.options);
-      });
-      it('conditions + callback', function(done) {
-        col.insert({ name: name }, { safe: true }, function(err) {
-          assert.ifError(err);
-          var m = mquery(col);
-          m.findOneAndRemove({ name: name }, function(err, res) {
-            assert.ifError(err);
-            assert.equal(name, res.value.name);
-            done();
-          });
-        });
-      });
-      it('query + callback', function(done) {
-        col.insert({ name: name }, { safe: true }, function(err) {
-          assert.ifError(err);
-          var n = mquery({ name: name });
-          var m = mquery(col);
-          m.findOneAndRemove(n, function(err, res) {
-            assert.ifError(err);
-            assert.equal(name, res.value.name);
-            done();
-          });
-        });
-      });
-    });
-    describe('with 3 args', function() {
-      it('conditions + options + callback', function(done) {
-        name = 'findOneAndRemove + conds + options + cb';
-        col.insert([{ name: name }, { name: 'a' }], { safe: true }, function(err) {
-          assert.ifError(err);
-          var m = mquery(col);
-          m.findOneAndRemove({ name: name }, { sort: { name: 1 }}, function(err, res) {
-            assert.ifError(err);
-            assert.ok(res.value);
-            assert.equal(name, res.value.name);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  describe('exec', function() {
-    beforeEach(function(done) {
-      col.insert([{ name: 'exec', age: 1 }, { name: 'exec', age: 2 }], done);
-    });
-
-    afterEach(function(done) {
-      mquery(col).remove(done);
-    });
-
-    it('requires an op', function() {
-      assert.throws(function() {
-        mquery().exec();
-      }, /Missing query type/);
-    });
-
-    describe('find', function() {
-      it('works', function(done) {
-        var m = mquery(col).find({ name: 'exec' });
-        m.exec(function(err, docs) {
-          assert.ifError(err);
-          assert.equal(2, docs.length);
-          done();
-        });
-      });
-
-      it('works with readPreferences', function(done) {
-        var m = mquery(col).find({ name: 'exec' });
-        try {
-          var rp = new require('mongodb').ReadPreference('primary');
-          m.read(rp);
-        } catch (e) {
-          done(e.code === 'MODULE_NOT_FOUND' ? null : e);
-          return;
-        }
-        m.exec(function(err, docs) {
-          assert.ifError(err);
-          assert.equal(2, docs.length);
-          done();
-        });
-      });
-
-      it('works with hint', function(done) {
-        mquery(col).hint({ _id: 1 }).find({ name: 'exec' }).exec(function(err, docs) {
-          assert.ifError(err);
-          assert.equal(2, docs.length);
-
-          mquery(col).hint('_id_').find({ age: 1 }).exec(function(err, docs) {
-            assert.ifError(err);
-            assert.equal(1, docs.length);
-            done();
-          });
-        });
-      });
-
-      it('works with readConcern', function(done) {
-        var m = mquery(col).find({ name: 'exec' });
-        m.readConcern('l');
-        m.exec(function(err, docs) {
-          assert.ifError(err);
-          assert.equal(2, docs.length);
-          done();
-        });
-      });
-
-      it('works with collation', function(done) {
-        var m = mquery(col).find({ name: 'EXEC' });
-        m.collation({ locale: 'en_US', strength: 1 });
-        m.exec(function(err, docs) {
-          assert.ifError(err);
-          assert.equal(2, docs.length);
-          done();
-        });
-      });
-    });
-
-    it('findOne', function(done) {
-      var m = mquery(col).findOne({ age: 2 });
-      m.exec(function(err, doc) {
-        assert.ifError(err);
-        assert.equal(2, doc.age);
-        done();
-      });
-    });
-
-    it('count', function(done) {
-      var m = mquery(col).count({ name: 'exec' });
-      m.exec(function(err, count) {
-        assert.ifError(err);
-        assert.equal(2, count);
-        done();
-      });
-    });
-
-    it('distinct', function(done) {
-      var m = mquery({ name: 'exec' });
-      m.collection(col);
-      m.distinct('age');
-      m.exec(function(err, array) {
-        assert.ifError(err);
-        assert.ok(Array.isArray(array));
-        assert.equal(2, array.length);
-        assert(~array.indexOf(1));
-        assert(~array.indexOf(2));
-        done();
-      });
-    });
-
-    describe('update', function() {
-      var num;
-
-      it('with a callback', function(done) {
-        var m = mquery(col);
-        m.where({ name: 'exec' });
-
-        m.count(function(err, _num) {
-          assert.ifError(err);
-          num = _num;
-          m.setOptions({ multi: true });
-          m.update({ name: 'exec + update' });
-          m.exec(function(err, res) {
-            assert.ifError(err);
-            assert.equal(num, res.result.n);
-            mquery(col).find({ name: 'exec + update' }, function(err, docs) {
-              assert.ifError(err);
-              assert.equal(num, docs.length);
-              done();
-            });
-          });
-        });
-      });
-
-      describe('updateMany', function() {
-        it('works', function(done) {
-          mquery(col).updateMany({ name: 'exec' }, { name: 'test' }).
-            exec(function(error) {
-              assert.ifError(error);
-              mquery(col).count({ name: 'test' }).exec(function(error, res) {
-                assert.ifError(error);
-                assert.equal(res, 2);
-                done();
-              });
-            });
-        });
-        it('works with write concern', function(done) {
-          mquery(col).updateMany({ name: 'exec' }, { name: 'test' })
-            .w(1).j(true).wtimeout(1000)
-            .exec(function(error) {
-              assert.ifError(error);
-              mquery(col).count({ name: 'test' }).exec(function(error, res) {
-                assert.ifError(error);
-                assert.equal(res, 2);
-                done();
-              });
-            });
-        });
-      });
-
-      describe('updateOne', function() {
-        it('works', function(done) {
-          mquery(col).updateOne({ name: 'exec' }, { name: 'test' }).
-            exec(function(error) {
-              assert.ifError(error);
-              mquery(col).count({ name: 'test' }).exec(function(error, res) {
-                assert.ifError(error);
-                assert.equal(res, 1);
-                done();
-              });
-            });
-        });
-      });
-
-      describe('replaceOne', function() {
-        it('works', function(done) {
-          mquery(col).replaceOne({ name: 'exec' }, { name: 'test' }).
-            exec(function(error) {
-              assert.ifError(error);
-              mquery(col).findOne({ name: 'test' }).exec(function(error, res) {
-                assert.ifError(error);
-                assert.equal(res.name, 'test');
-                assert.ok(res.age == null);
-                done();
-              });
-            });
-        });
-      });
-
-      it('without a callback', function(done) {
-        var m = mquery(col);
-        m.where({ name: 'exec + update' }).setOptions({ multi: true });
-        m.update({ name: 'exec' });
-
-        // unsafe write
-        m.exec();
-
-        setTimeout(function() {
-          mquery(col).find({ name: 'exec' }, function(err, docs) {
-            assert.ifError(err);
-            assert.equal(2, docs.length);
-            done();
-          });
-        }, 200);
-      });
-      it('preserves key ordering', function(done) {
-        var m = mquery(col);
-
-        var m2 = m.update({ _id : 'something' }, { '1' : 1, '2' : 2, '3' : 3});
-        var doc = m2._updateForExec().$set;
-        var count = 0;
-        for (var i in doc) {
-          if (count == 0) {
-            assert.equal('1', i);
-          } else if (count == 1) {
-            assert.equal('2', i);
-          } else if (count == 2) {
-            assert.equal('3', i);
-          }
-          count++;
-        }
-        done();
-      });
-    });
-
-    describe('remove', function() {
-      it('with a callback', function(done) {
-        var m = mquery(col).where({ age: 2 }).remove();
-        m.exec(function(err, res) {
-          assert.ifError(err);
-          assert.equal(1, res.result.n);
-          done();
-        });
-      });
-
-      it('without a callback', function(done) {
-        var m = mquery(col).where({ age: 1 }).remove();
-        m.exec();
-
-        setTimeout(function() {
-          mquery(col).where('name', 'exec').count(function(err, num) {
-            assert.equal(1, num);
-            done();
-          });
-        }, 200);
-      });
-    });
-
-    describe('deleteOne', function() {
-      it('with a callback', function(done) {
-        var m = mquery(col).where({ age: { $gte: 0 } }).deleteOne();
-        m.exec(function(err, res) {
-          assert.ifError(err);
-          assert.equal(res.result.n, 1);
-          done();
-        });
-      });
-
-      it('with justOne set', function(done) {
-        var m = mquery(col).where({ age: { $gte: 0 } }).
-          // Should ignore `justOne`
-          setOptions({ justOne: false }).
-          deleteOne();
-        m.exec(function(err, res) {
-          assert.ifError(err);
-          assert.equal(res.result.n, 1);
-          done();
-        });
-      });
-    });
-
-    describe('deleteMany', function() {
-      it('with a callback', function(done) {
-        var m = mquery(col).where({ age: { $gte: 0 } }).deleteMany();
-        m.exec(function(err, res) {
-          assert.ifError(err);
-          assert.equal(res.result.n, 2);
-          done();
-        });
-      });
-    });
-
-    describe('findOneAndUpdate', function() {
-      it('with a callback', function(done) {
-        var m = mquery(col);
-        m.findOneAndUpdate({ name: 'exec', age: 1 }, { $set: { name: 'findOneAndUpdate' }});
-        m.exec(function(err, res) {
-          assert.ifError(err);
-          assert.equal('findOneAndUpdate', res.value.name);
-          done();
-        });
-      });
-    });
-
-    describe('findOneAndRemove', function() {
-      it('with a callback', function(done) {
-        var m = mquery(col);
-        m.findOneAndRemove({ name: 'exec', age: 2 });
-        m.exec(function(err, res) {
-          assert.ifError(err);
-          assert.equal('exec', res.value.name);
-          assert.equal(2, res.value.age);
-          mquery(col).count({ name: 'exec' }, function(err, num) {
-            assert.ifError(err);
-            assert.equal(1, num);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  describe('setTraceFunction', function() {
-    beforeEach(function(done) {
-      col.insert([{ name: 'trace', age: 93 }], done);
-    });
-
-    it('calls trace function when executing query', function(done) {
-      var m = mquery(col);
-
-      var resultTraceCalled;
-
-      m.setTraceFunction(function(method, queryInfo) {
-        try {
-          assert.equal('findOne', method);
-          assert.equal('trace', queryInfo.conditions.name);
-        } catch (e) {
-          done(e);
-        }
-
-        return function(err, result, millis) {
-          try {
-            assert.equal(93, result.age);
-            assert.ok(typeof millis === 'number');
-          } catch (e) {
-            done(e);
-          }
-          resultTraceCalled = true;
-        };
-      });
-
-      m.findOne({name: 'trace'}, function(err, doc) {
-        assert.ifError(err);
-        assert.equal(resultTraceCalled, true);
-        assert.equal(93, doc.age);
-        done();
-      });
-    });
-
-    it('inherits trace function when calling toConstructor', function(done) {
-      function traceFunction() { return function() {}; }
-
-      var tracedQuery = mquery().setTraceFunction(traceFunction).toConstructor();
-
-      var query = tracedQuery();
-      assert.equal(traceFunction, query._traceFunction);
-
-      done();
-    });
-  });
-
-  describe('thunk', function() {
-    it('returns a function', function(done) {
-      assert.equal('function', typeof mquery().thunk());
-      done();
-    });
-
-    it('passes the fn arg to `exec`', function(done) {
-      function cb() {}
-      var m = mquery();
-
-      m.exec = function testing(fn) {
-        assert.equal(this, m);
-        assert.equal(cb, fn);
-        done();
-      };
-
-      m.thunk()(cb);
-    });
-  });
-
-  describe('then', function() {
-    before(function(done) {
-      col.insert([{ name: 'then', age: 1 }, { name: 'then', age: 2 }], done);
-    });
-
-    after(function(done) {
-      mquery(col).remove({ name: 'then' }).exec(done);
-    });
-
-    it('returns a promise A+ compat object', function(done) {
-      var m = mquery(col).find();
-      assert.equal('function', typeof m.then);
-      done();
-    });
-
-    it('creates a promise that is resolved on success', function(done) {
-      var promise = mquery(col).count({ name: 'then' }).then();
-      promise.then(function(count) {
-        assert.equal(2, count);
-        done();
-      }, done);
-    });
-
-    it('supports exec() cb being called synchronously #66', function(done) {
-      var query = mquery(col).count({ name: 'then' });
-      query.exec = function(cb) {
-        cb(null, 66);
-      };
-
-      query.then(success, done);
-      function success(count) {
-        assert.equal(66, count);
-        done();
-      }
-    });
-
-    it('supports other Promise libs', function(done) {
-      var bluebird = mquery.Promise;
-
-      // hack for testing
-      mquery.Promise = function P() {
-        mquery.Promise = bluebird;
-        this.then = function(x, y) {
-          return x + y;
-        };
-      };
-
-      var val = mquery(col).count({ name: 'exec' }).then(1, 2);
-      assert.equal(val, 3);
-      done();
-    });
-  });
-
-  describe('stream', function() {
-    before(function(done) {
-      col.insert([{ name: 'stream', age: 1 }, { name: 'stream', age: 2 }], done);
-    });
-
-    after(function(done) {
-      mquery(col).remove({ name: 'stream' }).exec(done);
-    });
-
-    describe('throws', function() {
-      describe('if used with non-find operations', function() {
-        var ops = ['update', 'findOneAndUpdate', 'remove', 'count', 'distinct'];
-
-        ops.forEach(function(op) {
-          assert.throws(function() {
-            mquery(col)[op]().stream();
-          });
-        });
-      });
-    });
-
-    it('returns a stream', function(done) {
-      var stream = mquery(col).find({ name: 'stream' }).stream();
-      var count = 0;
-      var err;
-
-      stream.on('data', function(doc) {
-        assert.equal('stream', doc.name);
-        ++count;
-      });
-
-      stream.on('error', function(er) {
-        err = er;
-      });
-
-      stream.on('end', function() {
-        if (err) return done(err);
-        assert.equal(2, count);
-        done();
-      });
-    });
-  });
-
-  function noDistinct(type) {
-    it('cannot be used with distinct()', function(done) {
-      assert.throws(function() {
-        mquery().distinct('name')[type](4);
-      }, new RegExp(type + ' cannot be used with distinct'));
-      done();
-    });
-  }
-
-  function no(method, type) {
-    it('cannot be used with ' + method + '()', function(done) {
-      assert.throws(function() {
-        mquery()[method]()[type](4);
-      }, new RegExp(type + ' cannot be used with ' + method));
-      done();
-    });
-  }
-
-  // query internal
-
-  describe('_updateForExec', function() {
-    it('returns a clone of the update object with same key order #19', function(done) {
-      var update = {};
-      update.$push = { n: { $each: [{x:10}], $slice: -1, $sort: {x:1}}};
-
-      var q = mquery().update({ x: 1 }, update);
-
-      // capture original key order
-      var order = [];
-      var key;
-      for (key in q._update.$push.n) {
-        order.push(key);
-      }
-
-      // compare output
-      var doc = q._updateForExec();
-      var i = 0;
-      for (key in doc.$push.n) {
-        assert.equal(key, order[i]);
-        i++;
-      }
-
-      done();
-    });
-  });
-});