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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.
42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { falsey, args, slice, symbol, realm } from './utils.js';
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import isNull from '../isNull.js';
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describe('isNull', function() {
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it('should return `true` for `null` values', function() {
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assert.strictEqual(isNull(null), true);
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});
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it('should return `false` for non `null` values', function() {
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var expected = lodashStable.map(falsey, function(value) {
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return value === null;
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});
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var actual = lodashStable.map(falsey, function(value, index) {
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return index ? isNull(value) : isNull();
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});
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assert.deepStrictEqual(actual, expected);
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assert.strictEqual(isNull(args), false);
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assert.strictEqual(isNull([1, 2, 3]), false);
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assert.strictEqual(isNull(true), false);
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assert.strictEqual(isNull(new Date), false);
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assert.strictEqual(isNull(new Error), false);
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assert.strictEqual(isNull(_), false);
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assert.strictEqual(isNull(slice), false);
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assert.strictEqual(isNull({ 'a': 1 }), false);
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assert.strictEqual(isNull(1), false);
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assert.strictEqual(isNull(/x/), false);
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assert.strictEqual(isNull('a'), false);
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assert.strictEqual(isNull(symbol), false);
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});
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it('should work with nulls from another realm', function() {
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if (realm.object) {
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assert.strictEqual(isNull(realm.null), true);
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}
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});
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});
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