test(book-data): add tests for http-Based service

Author: robinboehm

src/app/book/shared/book-data.service.spec.ts

@@ -23,15 +23,57 @@ describe('BookStaticDataService', () => {
 
   it('should return all books', inject([BookDataService, HttpTestingController],
     (service: BookDataService, backend: HttpTestingController) => {
+      // call service method and test IN the subscription. no need to use async anymore!!
+      service.getBooks()
+        .subscribe(books => {
+          expect(books).toEqual(staticBookData)
+        });
+      // Wait for the call and response with mockdata  `.flush()`
+      backend.expectOne('http://localhost:4730/books').flush(staticBookData, { status: 200, statusText: 'Ok' });
+    }));
+
+
+  it('should return a single book', inject([BookDataService, HttpTestingController],
+    (service: BookDataService, backend: HttpTestingController) => {
+      // call service method and test IN the subscription. no need to use async anymore!!
+      service.getBookByIsbn(staticBookData[0].isbn)
+        .subscribe(books => {
+          expect(books).toEqual(staticBookData[0])
+        });
+      // Wait for the call and response with mockdata  `.flush()`
+      backend.expectOne(`http://localhost:4730/books/${staticBookData[0].isbn}`).flush(staticBookData[0], { status: 200, statusText: 'Ok' });
+    }));
 
-      // TODO: Implement Test s
 
+  it('should create a book with a post', inject([BookDataService, HttpTestingController],
+    (service: BookDataService, backend: HttpTestingController) => {
+      // call service method and test IN the subscription. no need to use async anymore!!
+      service.createBook(staticBookData[0])
+        .subscribe(books => {
+          expect(books).toEqual(staticBookData[0])
+        });
+      // Wait for the call and response with mockdata  `.flush()`
+      backend
+        .expectOne({ method: "POST", url: 'http://localhost:4730/books' })
+        .flush(staticBookData[0], { status: 201, statusText: 'Created' });
     }));
 
+    it('should update a book with a patch', inject([BookDataService, HttpTestingController],
+      (service: BookDataService, backend: HttpTestingController) => {
+        // call service method and test IN the subscription. no need to use async anymore!!
+        service.updateBook(staticBookData[0].isbn, staticBookData[0])
+          .subscribe(books => {
+            expect(books).toEqual(staticBookData[0])
+          });
+        // Wait for the call and response with mockdata  `.flush()`
+        backend
+          .expectOne({ method: "PATCH", url: `http://localhost:4730/books/${staticBookData[0].isbn}` })
+          .flush(staticBookData[0]);
+      }));
 });
 
 
-const staticBookData : Book[] = [
+const staticBookData: Book[] = [
   {
     'title': 'Design Patterns',
     'subtitle': 'Elements of Reusable Object-Oriented Software',