From: Kai Moritz <kai@juplo.de>
Date: Sun, 17 May 2020 14:32:44 +0000 (+0200)
Subject: Added more tests for HeroService
X-Git-Url: https://juplo.de/gitweb/?p=examples%2Fangular-tour-of-heroes;a=commitdiff_plain;h=510245b57541ddce833a1d76ae2953f12f80fb33

Added more tests for HeroService
---

diff --git a/src/app/hero.service.spec.ts b/src/app/hero.service.spec.ts
index 843d8a7..7730d9f 100644
--- a/src/app/hero.service.spec.ts
+++ b/src/app/hero.service.spec.ts
@@ -30,30 +30,63 @@ describe('HeroService', () => {
     expect(service).toBeTruthy();
   });
 
-  it('get for id=0 should return an empty Observable', () => {
-    service.getHero(0).subscribe(fail, fail);
+  describe('#getHeroes', () => {
 
-    // HeroService should have made one request to GET heroes from expected URL
-    const req = httpTestingController.expectOne(`${service.heroesUrl}/0`);
-    expect(req.request.method).toEqual('GET');
+    it('should return the expected heroes on success', () => {
 
-    // Respond with the mock heroes
-    req.flush('deliberate 404 error', {status: 404, statusText: 'Not Found'});
+      const expectedHeroes: Hero[] = [{id: 11, name: 'Dr Nice'}];
+
+      service.getHeroes().subscribe(
+        heroes => expect(heroes).toEqual(expectedHeroes, 'should return expected heroes'),
+        fail
+      );
+
+      const req = httpTestingController.expectOne(service.heroesUrl);
+      expect(req.request.method).toEqual('GET');
+
+      req.flush(expectedHeroes);
+    });
+
+    it('should return an empty list if the remote server fails', () => {
+
+      service.getHeroes().subscribe(
+        heroes => expect(heroes).toEqual([], 'should return an empty list'),
+        fail
+      );
+
+      const req = httpTestingController.expectOne(service.heroesUrl);
+      expect(req.request.method).toEqual('GET');
+
+      // Respond with the mock heroes
+      req.flush('deliberate 500 error', {status: 500, statusText: 'Server Error'});
+    });
   });
 
-  it('get for id=11 should return an Observable, that contains the hero with id 11', () => {
-    const expectedHero: Hero = {id: 11, name: 'Dr Nice'};
+  describe('#getHero', () => {
 
-    service.getHero(11).subscribe(
-      hero => expect(hero).toEqual(expectedHero, 'should return expected heroes'),
-      fail
-    );
+    it('should return an empty observable for an invalid id', () => {
 
-    // HeroService should have made one request to GET heroes from expected URL
-    const req = httpTestingController.expectOne(`${service.heroesUrl}/11`);
-    expect(req.request.method).toEqual('GET');
+      service.getHero(0).subscribe(fail, fail);
 
-    // Respond with the mock heroes
-    req.flush(expectedHero);
+      const req = httpTestingController.expectOne(`${service.heroesUrl}/0`);
+      expect(req.request.method).toEqual('GET');
+
+      req.flush('deliberate 404 error', {status: 404, statusText: 'Not Found'});
+    });
+
+    it('should return an observable with the requested hero for a valid id', () => {
+
+      const expectedHero: Hero = {id: 11, name: 'Dr Nice'};
+
+      service.getHero(11).subscribe(
+        hero => expect(hero).toEqual(expectedHero, 'should return expected heroes'),
+        fail
+      );
+
+      const req = httpTestingController.expectOne(`${service.heroesUrl}/11`);
+      expect(req.request.method).toEqual('GET');
+
+      req.flush(expectedHero);
+    });
   });
 });