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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.
41 lines
1.2 KiB
JavaScript
41 lines
1.2 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { empties, _, falsey, stubTrue } from './utils.js';
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describe('constant', function() {
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it('should create a function that returns `value`', function() {
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var object = { 'a': 1 },
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values = Array(2).concat(empties, true, 1, 'a'),
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constant = _.constant(object);
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var results = lodashStable.map(values, function(value, index) {
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if (index < 2) {
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return index ? constant.call({}) : constant();
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}
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return constant(value);
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});
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assert.ok(lodashStable.every(results, function(result) {
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return result === object;
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}));
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});
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it('should work with falsey values', function() {
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var expected = lodashStable.map(falsey, stubTrue);
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var actual = lodashStable.map(falsey, function(value, index) {
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var constant = index ? _.constant(value) : _.constant(),
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result = constant();
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return (result === value) || (result !== result && value !== value);
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});
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assert.deepStrictEqual(actual, expected);
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});
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it('should return a wrapped value when chaining', function() {
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var wrapped = _(true).constant();
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assert.ok(wrapped instanceof _);
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});
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});
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