@DataJpaTest

findByAuthorIgnoreCaseOrderByTitle("ANN") -> [Apple, Zebra]
DataSource class -> EmbeddedDataSourceProxy
JDBC URL starts with jdbc:h2:mem: -> true

beans in this context:
  BookController (@RestController)=no
  ApiExceptionHandler (@ControllerAdvice)=no
  PriceJson (@JacksonComponent)=no
  MockMvc=no
  JsonMapper (Jackson 3)=no
  BookService (@Service)=no
  BookRepository (Spring Data)=yes
  EntityManagerFactory=yes
  DataSource=yes
  RestClient.Builder=no
  IsbnLookupClient (@Component)=no
  AuditLogger (@Component)=no
  bean definitions=80