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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/object.assign/test/shimmed.js | |
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Diffstat (limited to 'node_modules/object.assign/test/shimmed.js')
-rw-r--r-- | node_modules/object.assign/test/shimmed.js | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/node_modules/object.assign/test/shimmed.js b/node_modules/object.assign/test/shimmed.js new file mode 100644 index 0000000..ee57758 --- /dev/null +++ b/node_modules/object.assign/test/shimmed.js @@ -0,0 +1,52 @@ +'use strict'; + +var assign = require('../'); +assign.shim(); + +var test = require('tape'); +var defineProperties = require('define-properties'); +var isEnumerable = Object.prototype.propertyIsEnumerable; +var functionsHaveNames = require('functions-have-names')(); + +var runTests = require('./tests'); + +test('shimmed', function (t) { + t.equal(Object.assign.length, 2, 'Object.assign has a length of 2'); + t.test('Function name', { skip: !functionsHaveNames }, function (st) { + st.equal(Object.assign.name, 'assign', 'Object.assign has name "assign"'); + st.end(); + }); + + t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) { + et.equal(false, isEnumerable.call(Object, 'assign'), 'Object.assign is not enumerable'); + et.end(); + }); + + var supportsStrictMode = (function () { return typeof this === 'undefined'; }()); + + t.test('bad object value', { skip: !supportsStrictMode }, function (st) { + st['throws'](function () { return Object.assign(undefined); }, TypeError, 'undefined is not an object'); + st['throws'](function () { return Object.assign(null); }, TypeError, 'null is not an object'); + st.end(); + }); + + // v8 in node 0.8 and 0.10 have non-enumerable string properties + var stringCharsAreEnumerable = isEnumerable.call('xy', 0); + t.test('when Object.assign is present and has pending exceptions', { skip: !stringCharsAreEnumerable || !Object.preventExtensions }, function (st) { + /* + * Firefox 37 still has "pending exception" logic in its Object.assign implementation, + * which is 72% slower than our shim, and Firefox 40's native implementation. + */ + var thrower = Object.preventExtensions({ 1: '2' }); + var error; + try { Object.assign(thrower, 'xy'); } catch (e) { error = e; } + st.equal(error instanceof TypeError, true, 'error is TypeError'); + st.equal(thrower[1], '2', 'thrower[1] === "2"'); + + st.end(); + }); + + runTests(Object.assign, t); + + t.end(); +}); |