fix(mock-doc): Add missing DOMParser stub to MockWindow (#3279)

this commit adds a DOMParser stub to MockWindow, as well as tests
for the presence of globals:
- DOMParser
- Request
- Response

Author: cam-narzt

src/mock-doc/global.ts

@@ -16,6 +16,7 @@ import {
 import { MockCustomEvent, MockEvent, MockKeyboardEvent, MockMouseEvent } from './event';
 import { MockHeaders } from './headers';
 import { MockRequest, MockResponse } from './request-response';
+import { MockDOMParser } from './parser';
 import { MockWindow } from './window';
 
 export function setupGlobal(gbl: any) {
@@ -159,6 +160,7 @@ const GLOBAL_CONSTRUCTORS: [string, any][] = [
   ['MouseEvent', MockMouseEvent],
   ['Request', MockRequest],
   ['Response', MockResponse],
+  ['DOMParser', MockDOMParser],
 
   ['HTMLAnchorElement', MockAnchorElement],
   ['HTMLBaseElement', MockBaseElement],

src/mock-doc/parser.ts

@@ -0,0 +1,18 @@
+import { MockDocument } from './document';
+import { parseHtmlToDocument } from './parse-html';
+
+export type DOMParserSupportedType =
+  | 'text/html'
+  | 'text/xml'
+  | 'application/xml'
+  | 'application/xhtml+xml'
+  | 'image/svg+xml';
+
+export class MockDOMParser {
+  parseFromString(htmlToParse: string, mimeType: DOMParserSupportedType): MockDocument {
+    if (mimeType !== 'text/html') {
+      console.error('XML parsing not implemented yet, continuing as html');
+    }
+    return parseHtmlToDocument(htmlToParse);
+  }
+}

src/mock-doc/test/global.spec.ts

@@ -28,4 +28,13 @@ describe('global', () => {
     expect(KeyboardEvent).toBeDefined();
     expect(MouseEvent).toBeDefined();
   });
+
+  it('Fetch', () => {
+    expect(Request).toBeDefined();
+    expect(Response).toBeDefined();
+  });
+
+  it('Parse', () => {
+    expect(DOMParser).toBeDefined();
+  });
 });