Spring Boot, Mockito, Unit Testing, Junit 5, Rest Api.
bookService; private Books books; private Books savedBooks; @BeforeEach public void setup() { books = Books.builder() .authors(List.of("Pavan Mantha", "Deepak Mantha")) .isbn("erty567345fguio") .title("this is the sample title") .categories(List.of("spring", "Spring boot"))