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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.
81 lines
2.1 KiB
JavaScript
81 lines
2.1 KiB
JavaScript
import assert from 'assert';
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import { isEven, slice } from './utils.js';
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import remove from '../remove.js';
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describe('remove', function() {
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it('should modify the array and return removed elements', function() {
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var array = [1, 2, 3, 4],
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actual = remove(array, isEven);
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assert.deepStrictEqual(array, [1, 3]);
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assert.deepStrictEqual(actual, [2, 4]);
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});
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it('should provide correct `predicate` arguments', function() {
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var argsList = [],
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array = [1, 2, 3],
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clone = array.slice();
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remove(array, function(n, index) {
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var args = slice.call(arguments);
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args[2] = args[2].slice();
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argsList.push(args);
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return isEven(index);
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});
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assert.deepStrictEqual(argsList, [[1, 0, clone], [2, 1, clone], [3, 2, clone]]);
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});
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it('should work with `_.matches` shorthands', function() {
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var objects = [{ 'a': 0, 'b': 1 }, { 'a': 1, 'b': 2 }];
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remove(objects, { 'a': 1 });
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assert.deepStrictEqual(objects, [{ 'a': 0, 'b': 1 }]);
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});
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it('should work with `_.matchesProperty` shorthands', function() {
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var objects = [{ 'a': 0, 'b': 1 }, { 'a': 1, 'b': 2 }];
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remove(objects, ['a', 1]);
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assert.deepStrictEqual(objects, [{ 'a': 0, 'b': 1 }]);
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});
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it('should work with `_.property` shorthands', function() {
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var objects = [{ 'a': 0 }, { 'a': 1 }];
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remove(objects, 'a');
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assert.deepStrictEqual(objects, [{ 'a': 0 }]);
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});
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it('should preserve holes in arrays', function() {
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var array = [1, 2, 3, 4];
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delete array[1];
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delete array[3];
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remove(array, function(n) {
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return n === 1;
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});
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assert.ok(!('0' in array));
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assert.ok(!('2' in array));
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});
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it('should treat holes as `undefined`', function() {
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var array = [1, 2, 3];
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delete array[1];
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remove(array, function(n) {
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return n == null;
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});
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assert.deepStrictEqual(array, [1, 3]);
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});
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it('should not mutate the array until all elements to remove are determined', function() {
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var array = [1, 2, 3];
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remove(array, function(n, index) {
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return isEven(index);
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});
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assert.deepStrictEqual(array, [2]);
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});
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});
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