59695: BrowseByStartsWithDate tests

src/app/shared/browse-by/browse-by-starts-with/date/browse-by-starts-with-date.component.spec.ts

+import { BrowseByStartsWithDateComponent } from './browse-by-starts-with-date.component';
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { CommonModule } from '@angular/common';
+import { RouterTestingModule } from '@angular/router/testing';
+import { TranslateModule } from '@ngx-translate/core';
+import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
+import { EnumKeysPipe } from '../../../utils/enum-keys-pipe';
+import { ActivatedRoute, Router } from '@angular/router';
+import { DebugElement, NO_ERRORS_SCHEMA } from '@angular/core';
+import { ActivatedRouteStub } from '../../../testing/active-router-stub';
+import { of as observableOf } from 'rxjs/internal/observable/of';
+import { RouterStub } from '../../../testing/router-stub';
+import { By } from '@angular/platform-browser';
+
+describe('BrowseByStartsWithDateComponent', () => {
+  let comp: BrowseByStartsWithDateComponent;
+  let fixture: ComponentFixture<BrowseByStartsWithDateComponent>;
+  let route: ActivatedRoute;
+  let router: Router;
+
+  const options = [2019, 2018, 2017, 2016, 2015];
+
+  const activatedRouteStub = Object.assign(new ActivatedRouteStub(), {
+    params: observableOf({}),
+    queryParams: observableOf({})
+  });
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      imports: [CommonModule, RouterTestingModule.withRoutes([]), TranslateModule.forRoot(), NgbModule.forRoot()],
+      declarations: [BrowseByStartsWithDateComponent, EnumKeysPipe],
+      providers: [
+        { provide: 'startsWithOptions', useValue: options },
+        { provide: ActivatedRoute, useValue: activatedRouteStub },
+        { provide: Router, useValue: new RouterStub() }
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(BrowseByStartsWithDateComponent);
+    comp = fixture.componentInstance;
+    fixture.detectChanges();
+    route = (comp as any).route;
+    router = (comp as any).router;
+  });
+
+  it('should create a FormGroup containing a startsWith FormControl', () => {
+    expect(comp.formData.value.startsWith).toBeDefined();
+  });
+
+  describe('when selecting the first option in the dropdown', () => {
+    let select;
+
+    beforeEach(() => {
+      select = fixture.debugElement.query(By.css('select')).nativeElement;
+      select.value = select.options[0].value;
+      select.dispatchEvent(new Event('change'));
+      fixture.detectChanges();
+    });
+
+    it('should set startsWith to undefined', () => {
+      expect(comp.startsWith).toBeUndefined();
+    });
+
+    it('should not add a startsWith query parameter', () => {
+      route.queryParams.subscribe((params) => {
+        expect(params.startsWith).toBeUndefined();
+      });
+    });
+  });
+
+  describe('when selecting the second option in the dropdown', () => {
+    let select;
+    let input;
+    const expectedValue = '' + options[0];
+    const extras = {
+      queryParams: Object.assign({ startsWith: expectedValue }),
+      queryParamsHandling: 'merge'
+    };
+
+    beforeEach(() => {
+      select = fixture.debugElement.query(By.css('select')).nativeElement;
+      input = fixture.debugElement.query(By.css('input')).nativeElement;
+      select.value = select.options[1].value;
+      select.dispatchEvent(new Event('change'));
+      fixture.detectChanges();
+    });
+
+    it('should set startsWith to the correct value', () => {
+      expect(comp.startsWith).toEqual(expectedValue);
+    });
+
+    it('should add a startsWith query parameter', () => {
+      expect(router.navigate).toHaveBeenCalledWith([], extras);
+    });
+
+    it('should automatically fill in the input field', () => {
+      expect(input.value).toEqual(expectedValue);
+    });
+  });
+
+  describe('when filling in the input form', () => {
+    let form;
+    const expectedValue = '2015';
+    const extras = {
+      queryParams: Object.assign({ startsWith: expectedValue }),
+      queryParamsHandling: 'merge'
+    };
+
+    beforeEach(() => {
+      form = fixture.debugElement.query(By.css('form'));
+      comp.formData.value.startsWith = expectedValue;
+      form.triggerEventHandler('ngSubmit', null);
+      fixture.detectChanges();
+    });
+
+    it('should set startsWith to the correct value', () => {
+      expect(comp.startsWith).toEqual(expectedValue);
+    });
+
+    it('should add a startsWith query parameter', () => {
+      expect(router.navigate).toHaveBeenCalledWith([], extras);
+    });
+  });
+
+});