I’m currently working on a Spring Boot application and I’m trying to write a test for my service layer using @MockBean to avoid interacting with the database. Here’s the test code:

@SpringBootTest(classes = TestApplication.class)
@AutoConfigureMockMvc
class CartServiceImplTest {
    @MockBean
    private CartMapper cartMapper;
    @Autowired
    private CartServiceImpl cartService;
    @Test
    void testCountCarts() {
        Cart cart = new Cart();
        int count = 1;
        when(cartMapper.countCarts(Mockito.any())).thenReturn(count);
        assertEquals(count, cartService.countCarts(cart));
        //verify(cartMapper).countCarts(cart);
    }
}

However, the test fails with the following error:

Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 3.777 s <<< FAILURE! - in CartServiceImplTest
testCountCarts  Time elapsed: 0.809 s  <<< FAILURE!
org.opentest4j.AssertionFailedError: expected: <1> but was: <5>
    at CartServiceImplTest.testCountCarts(CartServiceImplTest.java:46)

It seems like the @MockBean annotation is not working as expected, and the test is still connecting to my database.

Here’s the configuration for my test context:

@ComponentScan(basePackages = {"world.xuewei"}, excludeFilters = {@ComponentScan.Filter(classes = {SpringBootApplication.class})
})
@SpringBootConfiguration
@EnableAutoConfiguration
@MapperScan(basePackages = {"world.xuewei.mapper"})
public class TestApplication {
    public static void main(String[] args) {
        SpringApplication.run(TestApplication.class, args);
    }

}

In an attempt to solve the problem, I tried removing the @MapperScan(basePackages = {“world.xuewei.mapper”}) annotation. However, this resulted in a different error:

java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'addressController': Unsatisfied dependency expressed through field 'addressService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'addressService': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'world.xuewei.mapper.AddressMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@javax.annotation.Resource(shareable=true, lookup="", name="", description="", authenticationType=CONTAINER, type=java.lang.Object.class, mappedName="")}

I’m at a loss as to how to proceed. Any suggestions on how to resolve this issue would be greatly appreciated. Thanks in advance!