spring boot test unable to inject TestRestTemplate and MockMvc - spring-mvc

Question

I am using spring boot 1.4.0.RELEASE. I am writing tests for my controller class. I get the following exception.
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.concur.cognos.authentication.service.ServiceControllerITTest': Unsatisfied dependency expressed through field 'restTemplate': No qualifying bean of type [org.springframework.boot.test.web.client.TestRestTemplate] found for dependency [org.springframework.boot.test.web.client.TestRestTemplate]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.boot.test.web.client.TestRestTemplate] found for dependency [org.springframework.boot.test.web.client.TestRestTemplate]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
Here is my test class
public class ServiceControllerITTest extends ApplicationTests {
#Autowired
private TestRestTemplate restTemplate;
#Autowired
private MockMvc mvc;
#Test
public void exampleTest() throws Exception {
// test
}
}
ApplicationTests.java
#RunWith(SpringRunner.class)
#SpringBootTest
#WebAppConfiguration
//#DirtiesContext
public class ApplicationTests {
#Autowired
Environment env;
#Test
public void contextLoads() {
}
}

Answer 1

TestRestTemplate is only auto-configured when #SpringBootTest has been configured with a webEnvironment that means it starts the web container and listens for HTTP requests. For example:
#SpringBootTest(webEnvironment=WebEnvironment.RANDOM_PORT)

Answer 2

If you read the java doc of SpringBootTest annotation, it says that annotation provides below features (not listing all of them here, but only what are relevant to the question.)
Provides support for different webEnvironment modes, including the ability to start a fully running web server listening on a defined or random port.
Registers a TestRestTemplate and/or WebTestClient bean for use in web tests that are using a fully running web server listening on a defined or random port.
So #SpringBootTest(webEnvironment=WebEnvironment.RANDOM_PORT) provides the ability to autowire TestRestTemplate because it starts a fully running web server [as mentioned in #AndyWilkinson' answer as well].
But if you want to autowire MockMvc as well in same TestClass then use
#AutoConfigureMockMvc annotation over TestClass.
This is how a Test class may look like:
#RunWith(SpringRunner.class)
#SpringBootTest(webEnvironment=WebEnvironment.RANDOM_PORT)
#AutoConfigureMockMvc
public class SBTest {
#Autowired
private TestRestTemplate restTemplate;
#Autowired
private MockMvc mvc;
// tests
}

Answer 3

To work with that, don't use a deprecated TestRestTemplate.
Deprecated:
import org.springframework.boot.test.TestRestTemplate;
Correct:
import org.springframework.boot.test.web.client.TestRestTemplate;
Then you can use the #Autowired annotation in your class:
#Autowired
private TestRestTemplate restTemplate;
And don't use:
#Autowired
private MockMvc mvc;
Both together doesn't work.

Answer 4

According to Spring boot documentation :
You can also auto-configure MockMvc in a non-#WebMvcTest (e.g. SpringBootTest) by annotating it with #AutoConfigureMockMvc.