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diff --git a/node_modules/postcss-modules-values/test/index.js b/node_modules/postcss-modules-values/test/index.js
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+++ b/node_modules/postcss-modules-values/test/index.js
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+/* global describe, it */
+
+import postcss from 'postcss'
+import assert from 'assert'
+
+import constants from '../src'
+
+const test = (input, expected) => {
+  let processor = postcss([constants])
+  assert.equal(processor.process(input).css, expected)
+}
+
+describe('constants', () => {
+  it('should pass through an empty string', () => {
+    test('', '')
+  })
+
+  it('should export a constant', () => {
+    test('@value red blue;', ':export {\n  red: blue\n}')
+  })
+
+  it('gives an error when there is no semicolon between lines', () => {
+    const input = '@value red blue\n@value green yellow'
+    let processor = postcss([constants])
+    const result = processor.process(input)
+    const warnings = result.warnings()
+
+    assert.equal(warnings.length, 1)
+    assert.equal(warnings[0].text, 'Invalid value definition: red blue\n@value green yellow')
+  })
+
+  it('should export a more complex constant', () => {
+    test('@value small (max-width: 599px);', ':export {\n  small: (max-width: 599px)\n}')
+  })
+
+  it('should replace constants within the file', () => {
+    test('@value blue red; .foo { color: blue; }', ':export {\n  blue: red;\n}\n.foo { color: red; }')
+  })
+
+  it('should import and re-export a simple constant', () => {
+    test('@value red from "./colors.css";', ':import("./colors.css") {\n  i__const_red_0: red\n}\n:export {\n  red: i__const_red_0\n}')
+  })
+
+  it('should import a simple constant and replace usages', () => {
+    test('@value red from "./colors.css"; .foo { color: red; }', ':import("./colors.css") {\n  i__const_red_1: red;\n}\n:export {\n  red: i__const_red_1;\n}\n.foo { color: i__const_red_1; }')
+  })
+
+  it('should import and alias a constant and replace usages', () => {
+    test('@value blue as red from "./colors.css"; .foo { color: red; }', ':import("./colors.css") {\n  i__const_red_2: blue;\n}\n:export {\n  red: i__const_red_2;\n}\n.foo { color: i__const_red_2; }')
+  })
+
+  it('should import multiple from a single file', () => {
+    test(
+      `@value blue, red from "./colors.css";
+.foo { color: red; }
+.bar { color: blue }`,
+      `:import("./colors.css") {
+  i__const_blue_3: blue;
+  i__const_red_4: red;
+}
+:export {
+  blue: i__const_blue_3;
+  red: i__const_red_4;
+}
+.foo { color: i__const_red_4; }
+.bar { color: i__const_blue_3 }`)
+  })
+
+  it('should import from a definition', () => {
+    test(
+      '@value colors: "./colors.css"; @value red from colors;',
+      ':import("./colors.css") {\n  i__const_red_5: red\n}\n' +
+      ':export {\n  colors: "./colors.css";\n  red: i__const_red_5\n}'
+    )
+  })
+
+  it('should only allow values for paths if defined in the right order', () => {
+    test(
+      '@value red from colors; @value colors: "./colors.css";',
+      ':import(colors) {\n  i__const_red_6: red\n}\n' +
+      ':export {\n  red: i__const_red_6;\n  colors: "./colors.css"\n}'
+    )
+  })
+
+  it('should allow transitive values', () => {
+    test(
+      '@value aaa: red;\n@value bbb: aaa;\n.a { color: bbb; }',
+      ':export {\n  aaa: red;\n  bbb: red;\n}\n.a { color: red; }'
+    )
+  })
+
+  it('should allow transitive values within calc', () => {
+    test(
+      '@value base: 10px;\n@value large: calc(base * 2);\n.a { margin: large; }',
+      ':export {\n  base: 10px;\n  large: calc(10px * 2);\n}\n.a { margin: calc(10px * 2); }'
+    )
+  })
+
+  it('should preserve import order', () => {
+    test(
+      '@value a from "./a.css"; @value b from "./b.css";',
+      ':import("./a.css") {\n  i__const_a_7: a\n}\n' +
+      ':import("./b.css") {\n  i__const_b_8: b\n}\n' +
+      ':export {\n  a: i__const_a_7;\n  b: i__const_b_8\n}'
+    )
+  })
+
+  it('should allow custom-property-style names', () => {
+    test(
+      '@value --red from "./colors.css"; .foo { color: --red; }',
+      ':import("./colors.css") {\n  i__const___red_9: --red;\n}\n' +
+      ':export {\n  --red: i__const___red_9;\n}\n' +
+      '.foo { color: i__const___red_9; }')
+  })
+
+  it('should allow all colour types', () => {
+    test(
+      '@value named: red; @value 3char #0f0; @value 6char #00ff00; @value rgba rgba(34, 12, 64, 0.3); @value hsla hsla(220, 13.0%, 18.0%, 1);\n' +
+      '.foo { color: named; background-color: 3char; border-top-color: 6char; border-bottom-color: rgba; outline-color: hsla; }',
+      ':export {\n  named: red;\n  3char: #0f0;\n  6char: #00ff00;\n  rgba: rgba(34, 12, 64, 0.3);\n  hsla: hsla(220, 13.0%, 18.0%, 1);\n}\n' +
+      '.foo { color: red; background-color: #0f0; border-top-color: #00ff00; border-bottom-color: rgba(34, 12, 64, 0.3); outline-color: hsla(220, 13.0%, 18.0%, 1); }')
+  })
+
+  it('should import multiple from a single file on multiple lines', () => {
+    test(
+      `@value (
+  blue,
+  red
+) from "./colors.css";
+.foo { color: red; }
+.bar { color: blue }`,
+      `:import("./colors.css") {
+  i__const_blue_10: blue;
+  i__const_red_11: red;
+}
+:export {
+  blue: i__const_blue_10;
+  red: i__const_red_11;
+}
+.foo { color: i__const_red_11; }
+.bar { color: i__const_blue_10 }`)
+  })
+
+  it('should allow definitions with commas in them', () => {
+    test(
+      '@value coolShadow: 0 11px 15px -7px rgba(0,0,0,.2),0 24px 38px 3px rgba(0,0,0,.14)   ;\n' +
+      '.foo { box-shadow: coolShadow; }',
+      ':export {\n  coolShadow: 0 11px 15px -7px rgba(0,0,0,.2),0 24px 38px 3px rgba(0,0,0,.14);\n}\n' +
+      '.foo { box-shadow: 0 11px 15px -7px rgba(0,0,0,.2),0 24px 38px 3px rgba(0,0,0,.14); }')
+  })
+
+  it('should allow values with nested parantheses', () => {
+    test(
+      '@value aaa: color(red lightness(50%));',
+      ':export {\n  aaa: color(red lightness(50%))\n}'
+    )
+  })
+})