[SG-397] Configure jest for Desktop and add simple tests (#3467)

* Configure jest for Desktop and add simple tests

* Remove Jest from tsconfig types

apps/desktop/src/app/vault/generator.component.spec.ts

@@ -0,0 +1,77 @@
+import { NO_ERRORS_SCHEMA } from "@angular/core";
+import { ComponentFixture, TestBed } from "@angular/core/testing";
+import { ActivatedRoute } from "@angular/router";
+import { Substitute } from "@fluffy-spoon/substitute";
+import { mock, MockProxy } from "jest-mock-extended";
+
+import { I18nPipe } from "@bitwarden/angular/pipes/i18n.pipe";
+import { I18nService } from "@bitwarden/common/abstractions/i18n.service";
+import { LogService } from "@bitwarden/common/abstractions/log.service";
+import { PasswordGenerationService } from "@bitwarden/common/abstractions/passwordGeneration.service";
+import { PlatformUtilsService } from "@bitwarden/common/abstractions/platformUtils.service";
+import { StateService } from "@bitwarden/common/abstractions/state.service";
+import { UsernameGenerationService } from "@bitwarden/common/abstractions/usernameGeneration.service";
+
+import { GeneratorComponent } from "./generator.component";
+
+describe("GeneratorComponent", () => {
+  let component: GeneratorComponent;
+  let fixture: ComponentFixture<GeneratorComponent>;
+  let platformUtilsServiceMock: MockProxy<PlatformUtilsService>;
+
+  beforeEach(() => {
+    platformUtilsServiceMock = mock<PlatformUtilsService>();
+
+    TestBed.configureTestingModule({
+      declarations: [GeneratorComponent, I18nPipe],
+      providers: [
+        {
+          provide: PasswordGenerationService,
+          useClass: Substitute.for<PasswordGenerationService>(),
+        },
+        {
+          provide: UsernameGenerationService,
+          useClass: Substitute.for<UsernameGenerationService>(),
+        },
+        {
+          provide: StateService,
+          useClass: Substitute.for<StateService>(),
+        },
+        {
+          provide: PlatformUtilsService,
+          useValue: platformUtilsServiceMock,
+        },
+        {
+          provide: I18nService,
+          useClass: Substitute.for<I18nService>(),
+        },
+        {
+          provide: ActivatedRoute,
+          useClass: Substitute.for<ActivatedRoute>(),
+        },
+        {
+          provide: LogService,
+          useClass: Substitute.for<LogService>(),
+        },
+      ],
+      schemas: [NO_ERRORS_SCHEMA],
+    }).compileComponents();
+  });
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(GeneratorComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it("should create", () => {
+    expect(component).toBeTruthy();
+  });
+
+  describe("usernameTypesLearnMore()", () => {
+    it("should call platformUtilsService.launchUri() once", () => {
+      component.usernameTypesLearnMore();
+      expect(platformUtilsServiceMock.launchUri).toHaveBeenCalledTimes(1);
+    });
+  });
+});