### Question:
BooksService { public List<String> getBookTitles(String title) { String url = "https: BooksResponse data = restTemplate.getForObject(url, BooksResponse.class); List<String> bookTitles = new ArrayList<String>(); for (Book book : data.items) { bookTitles.add(book.volumeInfo.title); } return bookTitles; } BooksService(RestTemplateBuilder restTemplateBuilder); List<String> getBookTitles(String title);  }### Answer:
@Test public void bookServiceTest() throws Exception { this.booksServer.expect(requestTo("https: .andRespond(withSuccess(jsonResponse, MediaType.APPLICATION_JSON)); List<String> books = this.service.getBookTitles("Java"); System.out.println(books); assertThat(books).hasSize(2); assertThat(books).containsExactly("Java a Tope: J2me (java 2 Micro Edition).", "Introduccion Al Desarrollo de Programas Con Java"); }