angular-cn/packages/common/test/location/location_spec.ts

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/**
* @license
* Copyright Google LLC 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 {CommonModule, Location, LocationStrategy, PathLocationStrategy, PlatformLocation} from '@angular/common';
import {MockLocationStrategy, MockPlatformLocation} from '@angular/common/testing';
import {TestBed} from '@angular/core/testing';
const baseUrl = '/base';
describe('Location Class', () => {
describe('stripTrailingSlash', () => {
it('should strip single character slash', () => {
const input = '/';
expect(Location.stripTrailingSlash(input)).toBe('');
});
it('should normalize strip a trailing slash', () => {
const input = baseUrl + '/';
expect(Location.stripTrailingSlash(input)).toBe(baseUrl);
});
it('should ignore query params when stripping a slash', () => {
const input = baseUrl + '/?param=1';
expect(Location.stripTrailingSlash(input)).toBe(baseUrl + '?param=1');
});
it('should not remove slashes inside query params', () => {
const input = baseUrl + '?test/?=3';
expect(Location.stripTrailingSlash(input)).toBe(input);
});
it('should not remove slashes after a pound sign', () => {
const input = baseUrl + '#test/?=3';
expect(Location.stripTrailingSlash(input)).toBe(input);
});
});
describe('location.getState()', () => {
let location: Location;
beforeEach(() => {
TestBed.configureTestingModule({
imports: [CommonModule],
providers: [
{provide: LocationStrategy, useClass: PathLocationStrategy},
{
provide: PlatformLocation,
useFactory: () => {
return new MockPlatformLocation();
}
},
{provide: Location, useClass: Location, deps: [LocationStrategy, PlatformLocation]},
]
});
location = TestBed.inject(Location);
});
it('should get the state object', () => {
expect(location.getState()).toBe(null);
location.go('/test', '', {foo: 'bar'});
expect(location.getState()).toEqual({foo: 'bar'});
});
it('should work after using back button', () => {
expect(location.getState()).toBe(null);
location.go('/test1', '', {url: 'test1'});
location.go('/test2', '', {url: 'test2'});
expect(location.getState()).toEqual({url: 'test2'});
location.back();
expect(location.getState()).toEqual({url: 'test1'});
});
});
describe('location.onUrlChange()', () => {
let location: Location;
let locationStrategy: MockLocationStrategy;
beforeEach(() => {
TestBed.configureTestingModule({
imports: [CommonModule],
providers: [
{provide: LocationStrategy, useClass: MockLocationStrategy},
{
provide: PlatformLocation,
useFactory: () => {
return new MockPlatformLocation();
}
},
{provide: Location, useClass: Location, deps: [LocationStrategy, PlatformLocation]},
]
});
location = TestBed.inject(Location);
locationStrategy = TestBed.inject(LocationStrategy) as MockLocationStrategy;
});
it('should have onUrlChange method', () => {
expect(typeof location.onUrlChange).toBe('function');
});
it('should add registered functions to urlChangeListeners', () => {
function changeListener(url: string, state: unknown) {
return undefined;
}
expect((location as any)._urlChangeListeners.length).toBe(0);
location.onUrlChange(changeListener);
expect((location as any)._urlChangeListeners.length).toBe(1);
expect((location as any)._urlChangeListeners[0]).toEqual(changeListener);
});
it('should only notify listeners once when multiple listeners are registered', () => {
let notificationCount = 0;
function incrementChangeListener(url: string, state: unknown) {
notificationCount += 1;
return undefined;
}
function noopChangeListener(url: string, state: unknown) {
return undefined;
}
location.onUrlChange(incrementChangeListener);
location.onUrlChange(noopChangeListener);
expect(notificationCount).toBe(0);
locationStrategy.simulatePopState('/test');
expect(notificationCount).toBe(1);
});
});
});