b38931b484
To avoid the unfamous error `Expression has changed after it was checked.` PR Close #25252
85 lines
3.0 KiB
TypeScript
85 lines
3.0 KiB
TypeScript
/**
|
|
* @license
|
|
* Copyright Google Inc. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by an MIT-style license that can be
|
|
* found in the LICENSE file at https://angular.io/license
|
|
*/
|
|
|
|
import {flatten, isDifferent} from '../../src/render3/util';
|
|
|
|
describe('util', () => {
|
|
|
|
describe('isDifferent', () => {
|
|
|
|
describe('checkNoChangeMode = false', () => {
|
|
it('should mark non-equal arguments as different', () => {
|
|
expect(isDifferent({}, {}, false)).toBeTruthy();
|
|
expect(isDifferent('foo', 'bar', false)).toBeTruthy();
|
|
expect(isDifferent(0, 1, false)).toBeTruthy();
|
|
});
|
|
|
|
it('should not mark equal arguments as different', () => {
|
|
const obj = {};
|
|
expect(isDifferent(obj, obj, false)).toBeFalsy();
|
|
expect(isDifferent('foo', 'foo', false)).toBeFalsy();
|
|
expect(isDifferent(1, 1, false)).toBeFalsy();
|
|
});
|
|
|
|
it('should not mark NaN as different',
|
|
() => { expect(isDifferent(NaN, NaN, false)).toBeFalsy(); });
|
|
|
|
it('should mark NaN with other values as different', () => {
|
|
expect(isDifferent(NaN, 'foo', false)).toBeTruthy();
|
|
expect(isDifferent(5, NaN, false)).toBeTruthy();
|
|
});
|
|
});
|
|
|
|
describe('checkNoChangeMode = true', () => {
|
|
// Assert relaxed constraint in checkNoChangeMode
|
|
it('should not mark non-equal arrays, object and function as different', () => {
|
|
expect(isDifferent([], [], true)).toBeFalsy();
|
|
expect(isDifferent(() => 0, () => 0, true)).toBeFalsy();
|
|
expect(isDifferent({}, {}, true)).toBeFalsy();
|
|
});
|
|
|
|
it('should mark non-equal arguments as different', () => {
|
|
expect(isDifferent('foo', 'bar', true)).toBeTruthy();
|
|
expect(isDifferent(0, 1, true)).toBeTruthy();
|
|
});
|
|
|
|
it('should not mark equal arguments as different', () => {
|
|
const obj = {};
|
|
expect(isDifferent(obj, obj, false)).toBeFalsy();
|
|
expect(isDifferent('foo', 'foo', false)).toBeFalsy();
|
|
expect(isDifferent(1, 1, false)).toBeFalsy();
|
|
});
|
|
|
|
it('should not mark NaN as different',
|
|
() => { expect(isDifferent(NaN, NaN, false)).toBeFalsy(); });
|
|
|
|
it('should mark NaN with other values as different', () => {
|
|
expect(isDifferent(NaN, 'foo', false)).toBeTruthy();
|
|
expect(isDifferent(5, NaN, false)).toBeTruthy();
|
|
});
|
|
});
|
|
|
|
});
|
|
|
|
describe('flatten', () => {
|
|
|
|
it('should flatten an empty array', () => { expect(flatten([])).toEqual([]); });
|
|
|
|
it('should flatten a flat array', () => { expect(flatten([1, 2, 3])).toEqual([1, 2, 3]); });
|
|
|
|
it('should flatten a nested array', () => {
|
|
expect(flatten([1, [2], 3])).toEqual([1, 2, 3]);
|
|
expect(flatten([[1], 2, [3]])).toEqual([1, 2, 3]);
|
|
expect(flatten([1, [2, [3]], 4])).toEqual([1, 2, 3, 4]);
|
|
expect(flatten([1, [2, [3]], [4]])).toEqual([1, 2, 3, 4]);
|
|
expect(flatten([1, [2, [3]], [[[4]]]])).toEqual([1, 2, 3, 4]);
|
|
expect(flatten([1, [], 2])).toEqual([1, 2]);
|
|
});
|
|
});
|
|
});
|