133 lines
4.6 KiB
TypeScript
133 lines
4.6 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 {DOCUMENT} from '@angular/common';
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import {TestBed} from '@angular/core/testing';
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import {BrowserModule, BrowserTransferStateModule, TransferState} from '@angular/platform-browser';
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import {StateKey, escapeHtml, makeStateKey, unescapeHtml} from '@angular/platform-browser/src/browser/transfer_state';
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(function() {
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function removeScriptTag(doc: Document, id: string) {
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const existing = doc.getElementById(id);
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if (existing) {
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doc.body.removeChild(existing);
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}
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}
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function addScriptTag(doc: Document, appId: string, data: {}) {
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const script = doc.createElement('script');
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const id = appId + '-state';
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script.id = id;
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script.setAttribute('type', 'application/json');
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script.textContent = escapeHtml(JSON.stringify(data));
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// Remove any stale script tags.
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removeScriptTag(doc, id);
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doc.body.appendChild(script);
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}
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describe('TransferState', () => {
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const APP_ID = 'test-app';
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let doc: Document;
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const TEST_KEY = makeStateKey<number>('test');
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const DELAYED_KEY = makeStateKey<string>('delayed');
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beforeEach(() => {
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TestBed.configureTestingModule({
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imports: [
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BrowserModule.withServerTransition({appId: APP_ID}),
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BrowserTransferStateModule,
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]
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});
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doc = TestBed.inject(DOCUMENT);
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});
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afterEach(() => { removeScriptTag(doc, APP_ID + '-state'); });
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it('is initialized from script tag', () => {
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addScriptTag(doc, APP_ID, {test: 10});
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const transferState: TransferState = TestBed.inject(TransferState);
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expect(transferState.get(TEST_KEY, 0)).toBe(10);
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});
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it('is initialized to empty state if script tag not found', () => {
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const transferState: TransferState = TestBed.inject(TransferState);
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expect(transferState.get(TEST_KEY, 0)).toBe(0);
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});
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it('supports adding new keys using set', () => {
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const transferState: TransferState = TestBed.inject(TransferState);
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transferState.set(TEST_KEY, 20);
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expect(transferState.get(TEST_KEY, 0)).toBe(20);
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expect(transferState.hasKey(TEST_KEY)).toBe(true);
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});
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it('supports setting and accessing value \'0\' via get', () => {
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const transferState: TransferState = TestBed.inject(TransferState);
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transferState.set(TEST_KEY, 0);
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expect(transferState.get(TEST_KEY, 20)).toBe(0);
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expect(transferState.hasKey(TEST_KEY)).toBe(true);
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});
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it('supports setting and accessing value \'false\' via get', () => {
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const transferState: TransferState = TestBed.inject(TransferState);
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transferState.set(TEST_KEY, false);
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expect(transferState.get(TEST_KEY, true)).toBe(false);
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expect(transferState.hasKey(TEST_KEY)).toBe(true);
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});
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it('supports setting and accessing value \'null\' via get', () => {
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const transferState: TransferState = TestBed.inject(TransferState);
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transferState.set(TEST_KEY, null);
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expect(transferState.get(TEST_KEY, 20 as any)).toBe(null);
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expect(transferState.hasKey(TEST_KEY)).toBe(true);
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});
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it('supports removing keys', () => {
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const transferState: TransferState = TestBed.inject(TransferState);
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transferState.set(TEST_KEY, 20);
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transferState.remove(TEST_KEY);
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expect(transferState.get(TEST_KEY, 0)).toBe(0);
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expect(transferState.hasKey(TEST_KEY)).toBe(false);
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});
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it('supports serialization using toJson()', () => {
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const transferState: TransferState = TestBed.inject(TransferState);
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transferState.set(TEST_KEY, 20);
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expect(transferState.toJson()).toBe('{"test":20}');
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});
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it('calls onSerialize callbacks when calling toJson()', () => {
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const transferState: TransferState = TestBed.inject(TransferState);
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transferState.set(TEST_KEY, 20);
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let value = 'initial';
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transferState.onSerialize(DELAYED_KEY, () => value);
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value = 'changed';
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expect(transferState.toJson()).toBe('{"test":20,"delayed":"changed"}');
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});
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});
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describe('escape/unescape', () => {
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it('works with all escaped characters', () => {
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const testString = '</script><script>alert(\'Hello&\' + "World");';
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const testObj = {testString};
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const escaped = escapeHtml(JSON.stringify(testObj));
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expect(escaped).toBe(
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'{&q;testString&q;:&q;&l;/script&g;&l;script&g;' +
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'alert(&s;Hello&a;&s; + \\&q;World\\&q;);&q;}');
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const unescapedObj = JSON.parse(unescapeHtml(escaped));
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expect(unescapedObj['testString']).toBe(testString);
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});
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});
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})();
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