test(example-app): karma example jasmine matchers (testing-library#294)

Author: lacolaco

apps/example-app-karma/jasmine-dom.d.ts

@@ -0,0 +1,5 @@
+declare module '@testing-library/jasmine-dom' {
+  // eslint-disable-next-line @typescript-eslint/naming-convention
+  const JasmineDOM: any;
+  export default JasmineDOM;
+}

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

@@ -2,7 +2,12 @@
 import 'zone.js/dist/zone-testing';
 import { getTestBed } from '@angular/core/testing';
 import { BrowserDynamicTestingModule, platformBrowserDynamicTesting } from '@angular/platform-browser-dynamic/testing';
-import '@testing-library/jasmine-dom';
+import JasmineDOM from '@testing-library/jasmine-dom';
+
+// Install custom matchers from jasmine-dom
+beforeEach(() => {
+  jasmine.addMatchers(JasmineDOM);
+});
 
 declare const require: any;