#26 added unit test for api.service.ts

quartz-manager-frontend/src/app/services/api.service.spec.ts

@@ -0,0 +1,75 @@
+import { TestBed } from "@angular/core/testing";
+import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
+import { ApiService } from './api.service';
+import { HttpClient, HttpHeaders } from '@angular/common/http';
+
+class Data{
+    name: string
+}
+
+class HttpResponseMock {
+    constructor(
+      public body: unknown,
+      public opts?: {
+        headers?:
+          | HttpHeaders
+          | {
+              [name: string]: string | string[];
+            };
+        status?: number;
+        statusText?: string;
+      }
+    ) {}
+  }
+
+describe('ApiServiceTest', () => {
+
+    let apiService: ApiService;
+    let httpClient: HttpClient;
+    let httpTestingController: HttpTestingController;
+
+    const SAMPLE_URL = '/sample-url';
+    const URL_401 = '/url-response-401';
+    const testData: Data = {name: 'Test Data'};
+
+    beforeEach(() => {
+
+        TestBed.configureTestingModule({ 
+            imports: [HttpClientTestingModule],
+            providers: [ApiService]
+        });
+        apiService = TestBed.inject(ApiService);
+
+        httpClient = TestBed.inject(HttpClient);
+        httpTestingController = TestBed.inject(HttpTestingController);
+    });
+
+    it('should be created', (): void => {
+        expect(apiService).toBeTruthy();
+    });
+
+    it('can test HttpClient.get', (): void => {
+
+        apiService.get(SAMPLE_URL).subscribe((res: Data) => {
+            expect(res).toEqual(testData);
+        });
+        
+        const req = httpTestingController.expectOne(SAMPLE_URL)
+        expect(req.request.method).toEqual('GET');
+        req.flush(new HttpResponseMock(testData));
+        httpTestingController.verify();
+    });
+
+    it('doesn\'t do anything if 401 is received', (): void => {
+
+        apiService.get(URL_401).subscribe((res: Data) => {
+            expect(false);
+        }, (error) => {expect(error.status).toBe(401)});
+        
+        const req = httpTestingController.expectOne(URL_401)
+        expect(req.request.method).toEqual('GET');
+        req.flush(null, {status: 401, statusText: 'unauthenticated'});
+        httpTestingController.verify();
+    });
+
+});