Test/group service spec

src/app/api/services/spec/group.service.spec.ts

@@ -0,0 +1,53 @@
+import { TestBed, fakeAsync, tick } from '@angular/core/testing';
+import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
+import { Group, Unit } from 'src/app/api/models/doubtfire-model';
+import { GroupService } from '../group.service';
+import { HttpRequest } from '@angular/common/http';
+
+describe('GroupService', () => {
+  let groupService: GroupService;
+  let httpMock: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [HttpClientTestingModule],
+      providers: [GroupService]
+    });
+
+    groupService = TestBed.inject(GroupService);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => {
+    httpMock.verify();
+  });
+
+  it('should return expected group (HttpClient called once)', fakeAsync(() => {
+    const dummyUnit = new Unit();
+    const g = new Group(dummyUnit);
+
+    g.id = 1;
+    g.name = 'Group 1';
+    g.capacityAdjustment = 10;
+    g.locked = false;
+    g.studentCount = 15;
+
+    const expectedGroups: Group[] = [g];
+
+    const mockUnitId = 1;
+    const mockGroupSetId = 2;
+    groupService
+      .query({ unitId: mockUnitId, groupSetId: mockGroupSetId })
+      .subscribe(groups => expect(groups).toEqual(expectedGroups, 'expected groups'));
+
+    const req = httpMock.expectOne((request: HttpRequest<any>): boolean => {
+      expect(request.url).toEqual(`http://localhost:3000/api/units/${mockUnitId}/group_sets/${mockGroupSetId}/groups/`);
+      expect(request.method).toBe('GET');
+      return true;
+    });
+
+    req.flush([g]);
+
+    tick();
+  }));
+});