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* Install test dependencies. * Add initial test files. These files were created using a simplistic AST manipulator using `recast` to preserve formatting. There's bound to be a huge chunk of errors, but this serves as a good start. QUnit was replaced with Mocha, with ES2015 imports running via `esm`. As far as possible, QUnit-specific syntax has been replaced with Mocha's `describe` and `it`, while the native Node.js `assert` module is used for assertions. Files in the `test` directory ending in `.test.js` will be treated as test files. * Add initial passing files to test run.
75 lines
2.3 KiB
JavaScript
75 lines
2.3 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { identity, empties, stubTrue, stubFalse } from './utils.js';
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import every from '../every.js';
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describe('every', function() {
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it('should return `true` if `predicate` returns truthy for all elements', function() {
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assert.strictEqual(lodashStable.every([true, 1, 'a'], identity), true);
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});
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it('should return `true` for empty collections', function() {
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var expected = lodashStable.map(empties, stubTrue);
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var actual = lodashStable.map(empties, function(value) {
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try {
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return every(value, identity);
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} catch (e) {}
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});
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assert.deepStrictEqual(actual, expected);
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});
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it('should return `false` as soon as `predicate` returns falsey', function() {
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var count = 0;
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assert.strictEqual(every([true, null, true], function(value) {
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count++;
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return value;
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}), false);
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assert.strictEqual(count, 2);
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});
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it('should work with collections of `undefined` values (test in IE < 9)', function() {
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assert.strictEqual(every([undefined, undefined, undefined], identity), false);
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});
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it('should use `_.identity` when `predicate` is nullish', function() {
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var values = [, null, undefined],
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expected = lodashStable.map(values, stubFalse);
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var actual = lodashStable.map(values, function(value, index) {
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var array = [0];
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return index ? every(array, value) : every(array);
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});
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assert.deepStrictEqual(actual, expected);
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expected = lodashStable.map(values, stubTrue);
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actual = lodashStable.map(values, function(value, index) {
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var array = [1];
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return index ? every(array, value) : every(array);
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});
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assert.deepStrictEqual(actual, expected);
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});
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it('should work with `_.property` shorthands', function() {
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var objects = [{ 'a': 0, 'b': 1 }, { 'a': 1, 'b': 2 }];
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assert.strictEqual(every(objects, 'a'), false);
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assert.strictEqual(every(objects, 'b'), true);
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});
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it('should work with `_.matches` shorthands', function() {
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var objects = [{ 'a': 0, 'b': 0 }, { 'a': 0, 'b': 1 }];
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assert.strictEqual(every(objects, { 'a': 0 }), true);
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assert.strictEqual(every(objects, { 'b': 1 }), false);
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});
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it('should work as an iteratee for methods like `_.map`', function() {
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var actual = lodashStable.map([[1]], every);
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assert.deepStrictEqual(actual, [true]);
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});
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});
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