52 lines
1.7 KiB
TypeScript
52 lines
1.7 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {flatten, isDifferent} from '../../src/render3/util';
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describe('util', () => {
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describe('isDifferent', () => {
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it('should mark non-equal arguments as different', () => {
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expect(isDifferent({}, {})).toBeTruthy();
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expect(isDifferent('foo', 'bar')).toBeTruthy();
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expect(isDifferent(0, 1)).toBeTruthy();
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});
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it('should not mark equal arguments as different', () => {
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const obj = {};
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expect(isDifferent(obj, obj)).toBeFalsy();
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expect(isDifferent('foo', 'foo')).toBeFalsy();
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expect(isDifferent(1, 1)).toBeFalsy();
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});
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it('should not mark NaN as different', () => { expect(isDifferent(NaN, NaN)).toBeFalsy(); });
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it('should mark NaN with other values as different', () => {
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expect(isDifferent(NaN, 'foo')).toBeTruthy();
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expect(isDifferent(5, NaN)).toBeTruthy();
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});
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});
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describe('flatten', () => {
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it('should flatten an empty array', () => { expect(flatten([])).toEqual([]); });
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it('should flatten a flat array', () => { expect(flatten([1, 2, 3])).toEqual([1, 2, 3]); });
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it('should flatten a nested array', () => {
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expect(flatten([1, [2], 3])).toEqual([1, 2, 3]);
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expect(flatten([[1], 2, [3]])).toEqual([1, 2, 3]);
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expect(flatten([1, [2, [3]], 4])).toEqual([1, 2, 3, 4]);
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expect(flatten([1, [2, [3]], [4]])).toEqual([1, 2, 3, 4]);
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expect(flatten([1, [2, [3]], [[[4]]]])).toEqual([1, 2, 3, 4]);
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expect(flatten([1, [], 2])).toEqual([1, 2]);
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});
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});
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});
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