test: add test case for #280 (#284)

Author: meirka

Diff for: projects/testing-library/tests/issues/issue-280.spec.ts

@@ -0,0 +1,76 @@
+import {Component, NgModule} from '@angular/core';
+import {render, screen} from '@testing-library/angular';
+import {Router, RouterModule, Routes} from "@angular/router";
+import {RouterTestingModule} from "@angular/router/testing";
+import userEvent from "@testing-library/user-event";
+import {Location} from "@angular/common";
+import {TestBed} from "@angular/core/testing";
+
+@Component({
+  template: `<div>Navigate</div> <router-outlet></router-outlet>`,
+})
+class MainComponent {}
+
+@Component({
+  template: `<div>first page</div><a routerLink="/second">go to second</a>`
+})
+class FirstComponent {}
+
+@Component({
+  template: `<div>second page</div><button (click)="goBack()">navigate back</button>`
+})
+class SecondComponent {
+  constructor(private location: Location) { }
+  goBack() {this.location.back();}
+}
+
+const routes: Routes = [
+  {path: '', redirectTo: '/first', pathMatch: 'full'},
+  {path: 'first', component: FirstComponent},
+  {path: 'second', component: SecondComponent}
+];
+
+@NgModule({
+  declarations: [FirstComponent, SecondComponent],
+  imports: [RouterModule.forRoot(routes)],
+  exports: [RouterModule]
+})
+class AppRoutingModule {}
+
+
+// test('navigate to second page and back', async () => {
+//   const subject = await render(MainComponent, {imports: [AppRoutingModule, RouterTestingModule]});
+//   await subject.navigate('/');
+//
+//   expect(await screen.findByText('Navigate')).toBeInTheDocument();
+//   expect(await screen.findByText('first page')).toBeInTheDocument();
+//
+//   userEvent.click(await screen.findByText('go to second'));
+//
+//   expect(await screen.findByText('second page')).toBeInTheDocument();
+//   expect(await screen.findByText('navigate back')).toBeInTheDocument();
+//
+//   userEvent.click(await screen.findByText('navigate back'));
+//
+//   expect(await screen.findByText('first page')).toBeInTheDocument();
+// });
+
+test('navigate to second page and back', async () => {
+  const subject = await render(MainComponent, {imports: [AppRoutingModule, RouterTestingModule]});
+
+  TestBed.inject(Router).initialNavigation();
+
+  await subject.navigate('/');
+
+  expect(await screen.findByText('Navigate')).toBeInTheDocument();
+  expect(await screen.findByText('first page')).toBeInTheDocument();
+
+  userEvent.click(await screen.findByText('go to second'));
+
+  expect(await screen.findByText('second page')).toBeInTheDocument();
+  expect(await screen.findByText('navigate back')).toBeInTheDocument();
+
+  userEvent.click(await screen.findByText('navigate back'));
+
+  expect(await screen.findByText('first page')).toBeInTheDocument();
+});