refactor(book-static-async-data): rename getBook to getBookByIsbn

Author: robinboehm

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

@@ -23,10 +23,10 @@ describe('BookStaticAsyncDataService', () => {
     }));
   });
 
-  describe('getBook(isbn)', () => {
+  describe('getBookByIsbn(isbn)', () => {
     it('should return the first elemnt of data', inject([BookStaticAsyncDataService], (service: BookStaticAsyncDataService) => {
       let result;
-      service.getBook(123).subscribe((book) => result = book)
+      service.getBookByIsbn(123).subscribe((book) => result = book)
 
       expect(result).toBe(service.staticBookData[0]);
     }));

src/app/book/shared/book-static-async-data.service.ts

@@ -50,7 +50,7 @@ export class BookStaticAsyncDataService {
     return Observable.of(this.staticBookData);
   }
 
-  getBook(isbn): Observable<Book> {
+  getBookByIsbn(isbn): Observable<Book> {
     return Observable.of(this.staticBookData[0]);
   }