Merge branch 'test/sample-01-cats-app' of https://github.com/Yansb/nest…

… into Yansb-test/sample-01-cats-app

sample/01-cats-app/src/cats/cats.controller.spec.ts

@@ -26,9 +26,29 @@ describe('CatsController', () => {
           name: 'Pixel',
         },
       ];
-      jest.spyOn(catsService, 'findAll').mockImplementation(() => result);
+      //@ts-ignore
+      catsService.cats = result;
 
       expect(await catsController.findAll()).toBe(result);
     });
   });
+
+  describe('create', () => {
+    it('should add a new cat', async () => {
+      const cat: Cat = {
+        age: 2,
+        breed: 'Bombay',
+        name: 'Pixel',
+      };
+      const expectedCatArray = [cat];
+
+      //@ts-ignore
+      expect(catsService.cats).toStrictEqual([]);
+
+      await catsController.create(cat);
+
+      //@ts-ignore
+      expect(catsService.cats).toStrictEqual(expectedCatArray);
+    });
+  });
 });

sample/01-cats-app/src/cats/cats.service.spec.ts

@@ -0,0 +1,48 @@
+import { Test } from '@nestjs/testing';
+import { CatsService } from './cats.service';
+import { Cat } from './interfaces/cat.interface';
+
+describe('CatsService', () => {
+  let catsService: CatsService;
+
+  beforeEach(async () => {
+    const moduleRef = await Test.createTestingModule({
+      providers: [CatsService],
+    }).compile();
+
+    catsService = moduleRef.get<CatsService>(CatsService);
+  });
+
+  describe('findAll', () => {
+    it('should return an array of cats', async () => {
+      const result = [
+        {
+          name: 'Frajola',
+          age: 2,
+          breed: 'Stray',
+        },
+      ];
+      //@ts-ignore
+      catsService.cats = result;
+
+      await expect(catsService.findAll()).resolves.toBe(result);
+    });
+  });
+
+  describe('create', () => {
+    it('should add a new cat', async () => {
+      const cat: Cat = {
+        name: 'Frajola',
+        age: 2,
+        breed: 'Stray',
+      };
+      const expectedCatArray = [cat];
+      //@ts-ignore
+      expect(catsService.cats).toStrictEqual([]);
+
+      await catsService.create(cat);
+      //@ts-ignore
+      expect(catsService.cats).toStrictEqual(expectedCatArray);
+    });
+  });
+});

sample/01-cats-app/src/cats/cats.service.ts

@@ -9,7 +9,7 @@ export class CatsService {
     this.cats.push(cat);
   }
 
-  findAll(): Cat[] {
-    return this.cats;
+  findAll(): Promise<Cat[]> {
+    return Promise.resolve(this.cats);
   }
 }