fix(test): move all test apps

apps/testing/create-harness/src/app/app.component.spec.ts

@@ -0,0 +1,22 @@
+import { render } from '@testing-library/angular';
+import { AppComponent } from './app.component';
+
+describe('AppComponent', () => {
+  describe('When clicking 2 times on plus button of first slider', () => {
+    test('Then value is 16', async () => {
+      await render(AppComponent);
+    });
+  });
+
+  describe('When clicking 1 time on plus button and two times on minus button of first slider', () => {
+    test('Then value is still 10', async () => {
+      await render(AppComponent);
+    });
+  });
+
+  describe('When clicking 4 times on plus button of slider 1', () => {
+    test('Then slider 2 is enabled', async () => {
+      await render(AppComponent);
+    });
+  });
+});