docs: add jasmine-dom example (testing-library#246)

Author: timdeschryver

apps/example-app-karma/src/app/issues/jasmine-matchers.ts

@@ -0,0 +1,11 @@
+import { render, screen } from '@testing-library/angular';
+
+it('can use jasmine matchers', async () => {
+  await render(`<div>Hello {{ name}}</div>`, {
+    componentProperties: {
+      name: 'Sarah',
+    },
+  });
+
+  expect(screen.getByText('Hello Sarah')).toBeVisible();
+});

apps/example-app-karma/src/test.ts

@@ -2,6 +2,11 @@
 import 'zone.js/dist/zone-testing';
 import { getTestBed } from '@angular/core/testing';
 import { BrowserDynamicTestingModule, platformBrowserDynamicTesting } from '@angular/platform-browser-dynamic/testing';
+import JasmineDOM from '@testing-library/jasmine-dom/dist';
+
+beforeAll(() => {
+  (jasmine.getEnv() as any).addMatchers(JasmineDOM);
+});
 
 declare const require: any;