Mockito injecting mocks Spring Boot test - spring-boot

Question

Hi I have a service class that contains mapper and repository:
#Service
public class ProductServiceImp implements ProductService {
#Autowired
private ProductRepository repository;
#Autowired
private WarehouseApiMapper mapper;
public ProductServiceImp(ProductRepository repository) {
this.repository = repository;
}
}
Repository:
#Repository
public interface ProductRepository extends JpaRepository<Product, Integer> {
}
Mapper:
#Mapper(componentModel = "spring")
public interface WarehouseApiMapper {
WarehouseApiMapper mapper = Mappers.getMapper(WarehouseApiMapper.class);
Product ProductDtoToProduct(ProductDto productDto);
ProductDto ProductToProductDto(Product product);
}
In test class I would like to inject mock repository and autowired mapper
Here is my test class:
#SpringBootTest
public class ProductServiceTest {
#Mock
ProductRepository repository;
#InjectMocks
ProductServiceImp service;
#ParameterizedTest
#MethodSource("provideParametersProductUpdate")
void assert_that_product_is_updated_correctly(String productName, BigDecimal productPrice) {
Product oldProduct = new Product("Product that does not exist", BigDecimal.valueOf(1000000), null);
oldProduct.setId(1);
Mockito.when(repository.findById(1)).thenReturn(Optional.of(oldProduct));
Product newProduct = new Product(productName, productPrice, null);
newProduct.setId(1);
ProductDto updatedProduct = service.updateProduct(newProduct);
Assertions.assertEquals(productPrice, updatedProduct.getPrice());
Assertions.assertEquals(productName, updatedProduct.getName());
}
private static Stream<Arguments> provideParametersProductUpdate() {
return Stream.of(
Arguments.of("dark chocolate", BigDecimal.valueOf(3.2)),
Arguments.of("chewing gum", BigDecimal.valueOf(1.2)),
Arguments.of("lollipop", BigDecimal.valueOf(4.0))
);
}
}
Code throws NullPointerException when is trying to map object in service method.
Somebody knows how can I inject this? Thanks for ur answers

Answer 1

If you want to create just a Mockito test you could use the annotation #RunWith(MockitoJUnitRunner.class) instead of #SpringBootTest.
But if you want to create a Spring Boot integration test then you should use #MockBean instead of #Mock and #Autowired instead of #InjectMocks.