angular-cn/modules/@angular/common/testing/mock_location_strategy.ts

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/**
* @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 {LocationStrategy} from '@angular/common';
import {EventEmitter, Injectable} from '@angular/core';
/**
* A mock implementation of {@link LocationStrategy} that allows tests to fire simulated
* location events.
*
* @stable
*/
@Injectable()
export class MockLocationStrategy extends LocationStrategy {
internalBaseHref: string = '/';
internalPath: string = '/';
internalTitle: string = '';
urlChanges: string[] = [];
/** @internal */
_subject: EventEmitter<any> = new EventEmitter();
constructor() { super(); }
simulatePopState(url: string): void {
this.internalPath = url;
this._subject.emit(new _MockPopStateEvent(this.path()));
}
path(includeHash: boolean = false): string { return this.internalPath; }
prepareExternalUrl(internal: string): string {
if (internal.startsWith('/') && this.internalBaseHref.endsWith('/')) {
return this.internalBaseHref + internal.substring(1);
}
return this.internalBaseHref + internal;
}
pushState(ctx: any, title: string, path: string, query: string): void {
this.internalTitle = title;
var url = path + (query.length > 0 ? ('?' + query) : '');
this.internalPath = url;
var externalUrl = this.prepareExternalUrl(url);
this.urlChanges.push(externalUrl);
}
replaceState(ctx: any, title: string, path: string, query: string): void {
this.internalTitle = title;
var url = path + (query.length > 0 ? ('?' + query) : '');
this.internalPath = url;
var externalUrl = this.prepareExternalUrl(url);
this.urlChanges.push('replace: ' + externalUrl);
}
onPopState(fn: (value: any) => void): void { this._subject.subscribe({next: fn}); }
getBaseHref(): string { return this.internalBaseHref; }
back(): void {
if (this.urlChanges.length > 0) {
this.urlChanges.pop();
var nextUrl = this.urlChanges.length > 0 ? this.urlChanges[this.urlChanges.length - 1] : '';
this.simulatePopState(nextUrl);
}
}
forward(): void { throw 'not implemented'; }
}
class _MockPopStateEvent {
pop: boolean = true;
type: string = 'popstate';
constructor(public newUrl: string) {}
}