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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.
86 lines
3.0 KiB
JavaScript
86 lines
3.0 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { _, LARGE_ARRAY_SIZE, stubOne, stubNaN, args } from './utils.js';
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describe('difference methods', function() {
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lodashStable.each(['difference', 'differenceBy', 'differenceWith'], function(methodName) {
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var func = _[methodName];
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it('`_.' + methodName + '` should return the difference of two arrays', function() {
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var actual = func([2, 1], [2, 3]);
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assert.deepStrictEqual(actual, [1]);
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});
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it('`_.' + methodName + '` should return the difference of multiple arrays', function() {
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var actual = func([2, 1, 2, 3], [3, 4], [3, 2]);
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assert.deepStrictEqual(actual, [1]);
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});
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it('`_.' + methodName + '` should treat `-0` as `0`', function() {
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var array = [-0, 0];
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var actual = lodashStable.map(array, function(value) {
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return func(array, [value]);
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});
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assert.deepStrictEqual(actual, [[], []]);
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actual = lodashStable.map(func([-0, 1], [1]), lodashStable.toString);
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assert.deepStrictEqual(actual, ['0']);
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});
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it('`_.' + methodName + '` should match `NaN`', function() {
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assert.deepStrictEqual(func([1, NaN, 3], [NaN, 5, NaN]), [1, 3]);
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});
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it('`_.' + methodName + '` should work with large arrays', function() {
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var array1 = lodashStable.range(LARGE_ARRAY_SIZE + 1),
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array2 = lodashStable.range(LARGE_ARRAY_SIZE),
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a = {},
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b = {},
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c = {};
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array1.push(a, b, c);
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array2.push(b, c, a);
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assert.deepStrictEqual(func(array1, array2), [LARGE_ARRAY_SIZE]);
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});
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it('`_.' + methodName + '` should work with large arrays of `-0` as `0`', function() {
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var array = [-0, 0];
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var actual = lodashStable.map(array, function(value) {
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var largeArray = lodashStable.times(LARGE_ARRAY_SIZE, lodashStable.constant(value));
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return func(array, largeArray);
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});
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assert.deepStrictEqual(actual, [[], []]);
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var largeArray = lodashStable.times(LARGE_ARRAY_SIZE, stubOne);
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actual = lodashStable.map(func([-0, 1], largeArray), lodashStable.toString);
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assert.deepStrictEqual(actual, ['0']);
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});
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it('`_.' + methodName + '` should work with large arrays of `NaN`', function() {
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var largeArray = lodashStable.times(LARGE_ARRAY_SIZE, stubNaN);
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assert.deepStrictEqual(func([1, NaN, 3], largeArray), [1, 3]);
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});
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it('`_.' + methodName + '` should work with large arrays of objects', function() {
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var object1 = {},
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object2 = {},
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largeArray = lodashStable.times(LARGE_ARRAY_SIZE, lodashStable.constant(object1));
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assert.deepStrictEqual(func([object1, object2], largeArray), [object2]);
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});
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it('`_.' + methodName + '` should ignore values that are not array-like', function() {
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var array = [1, null, 3];
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assert.deepStrictEqual(func(args, 3, { '0': 1 }), [1, 2, 3]);
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assert.deepStrictEqual(func(null, array, 1), []);
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assert.deepStrictEqual(func(array, args, null), [null]);
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});
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});
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});
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