Spring: Integration testing under Spring Boot application context but mocking services

Use @MockBean annotation

DEPRACATED:

So I wanted to create some integration tests for an API application that uses Spring Boot. The thing is that I needed to load the same application context as the real applicationm, because Spring Boot performs a bunch of configurations for you, and these were not being loaded in a StandAlone mode.

But also I didn't want to use real services which depend upon real data. Depending on databases for your tests creates fragile tests.

After researching on the web I found this way:


This is the typical Spring-Boot entry point class.

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i<span style="font-size: xx-small;">mport org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.context.annotation.ComponentScan;   @EnableAutoConfiguration @ComponentScan public class MyApplication {       public static void main(String[] args) {         SpringApplication.run(MyApplication.class, args);     } }   </span>

A base class having the logic to init the application context.

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<span style="font-size: xx-small;">import static org.springframework.test.web.servlet.setup.MockMvcBuilders.webAppContextSetup; import org.junit.Before; import org.junit.runner.RunWith; import org.mockito.MockitoAnnotations; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.SpringApplicationConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import org.springframework.test.context.web.WebAppConfiguration; import org.springframework.test.web.servlet.MockMvc; import org.springframework.web.context.WebApplicationContext;   @RunWith(SpringJUnit4ClassRunner.class) @WebAppConfiguration @SpringApplicationConfiguration(classes = MyApplication.class) public abstract class BaseIntegrationTest {       protected MockMvc mockMvc;           @Autowired     protected WebApplicationContext wac;       @Before     public void setup() {                  MockitoAnnotations.initMocks(this);         this.mockMvc = webAppContextSetup(wac).build();     } }   </span>

An implementation class mocking a required service class.

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<span style="font-size: xx-small;">public class FooIntegrationTest extends BaseIntegrationTest {       @Configuration     public static class TestConfiguration {         @Bean         @Primary         public FooService fooService() {             return mock(FooService.class);         }     }         @Autowired     FooService mockFooService; }</span>