Spring boot Integration unit testing NoSuchBeanDefinitionException exception - spring-boot

Question

I created a sample IntegrationFlow as shown below:
#Configuration
#EnableIntegration
#IntegrationComponentScan
#ComponentScan
public class RegisterHostFlow {
private final Logger LOG = LoggerFactory.getLogger(this.getClass());
#MessagingGateway
public interface RegisterHostGateway{
#Gateway(requestChannel = "registerHostInputChannel")
Host registerHost(Host host);
}
#Bean
public IntegrationFlow httpInboundGatewayFlow() {
return IntegrationFlows.from("registerHostInputChannel")
.handle((host, headers) -> {
return host;
})
.enrich(e -> e
.requestPayload(Message::getPayload)
.property("uuid", "34563456345634563456")
.property("id", "1234")
)
.get();
}
}
I am calling this from a spring MVC controller as below:
RegisterHostFlow.RegisterHostGateway registerHostGateway = applicationContext.getBean(RegisterHostFlow.RegisterHostGateway.class);
Host host1 = registerHostGateway.registerHost(host);
When I write a unit test to do some sanity testing as shown below, application fails to load with the error, NoSuchBeanException:
#RunWith(SpringRunner.class)
#WebMvcTest(HostController.class)
#EnableIntegration
#IntegrationComponentScan
public class HostControllerTest {
#Autowired
private MockMvc mvc;
#Test
public void registerHost_passedInHost_returnJson() throws Exception {
this.mvc.perform(post("/hostservice/v1/hosts").contentType(MediaType.APPLICATION_JSON). content('someJsonStringGoesHere'))
.andExpect(status().isOk())
.andExpect(content().contentType(MediaType.APPLICATION_JSON_UTF8));
}
Below is the exception I see:
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'registerHostInputChannel' available
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:65)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:167)
at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134)
at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:155)
Any pointers to how to have ApplicationContext autowire the integration beans when in test mode?

Answer 1

According the #WebMvcTest JavaDocs:
* Typically {#code #WebMvcTest} is used in combination with {#link MockBean #MockBean} or
* {#link Import #Import} to create any collaborators required by your {#code #Controller}
* beans.
You have to make your test class config like:
#RunWith(SpringRunner.class)
#WebMvcTest(HostController.class)
#Import(RegisterHostFlow.class)
public class HostControllerTest {
So, this way you have an MVC slice and collaborator in face of Spring Integration and target flow configuration.