Junit in Spring Boot keeps failing - spring

Question

I have very simple SpringBoot Junit but it keeps failing.
#RunWith(SpringRunner.class)
//#SpringBootTest
#WebMvcTest(TokenServiceImpl.class)
public class TokenTest {
#Test
public void getOauthToken()
{
System.out.println( " done test");
}
my TokenServiceImpl class has
public class TokenServiceImpl implements TokenService{
public String getToken() throws RuntimeException{
return " Token returned" ;
}
I get the below error : -Snippet
2019-11-27 19:12:45.884 WARN 15864 --- [ main]
o.s.w.c.s.GenericWebApplicationContext : Exception encountered
during context initialization - cancelling refresh attempt:
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'runApplication': Unsatisfied dependency
expressed through field 'job'; nested exception is
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'job' defined in class path resource
[com/mycompany/project1/batch/configurations/BatchBDREntityConfig.class]:
Unsatisfied dependency expressed through method 'job' parameter 4;
nested exception is
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'batchDBWriter': Unsatisfied dependency
expressed through field 'BDREntityRepository'; nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type
'com.mycompany.project1.batch.repositories.BDREntityRepository'
available: expected at least 1 bean which qualifies as autowire
candidate. Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
Field BDREntityRepository in
com.mycompany.project1.batch.services.BatchDBWriter required a bean of
type 'com.mycompany.project1.batch.repositories.BDREntityRepository'
that could not be found.
Consider defining a bean of type
'com.mycompany.project1.batch.repositories.BDREntityRepository' in
your configuration.
Caused by:
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'runApplication': Unsatisfied dependency
expressed through field 'job'; nested exception is
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'job' defined in class path resource
[com/mycompany/project1/batch/configurations/BatchBDREntityConfig.class]:
Unsatisfied dependency expressed through method 'job' parameter 4;
nested exception is
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'batchDBWriter': Unsatisfied dependency
expressed through field 'BDREntityRepository'; nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type
'com.mycompany.project1.batch.repositories.BDREntityRepository'
available: expected at least 1 bean which qualifies as autowire
candidate. Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
Caused by:
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'batchDBWriter': Unsatisfied dependency
expressed through field 'BDREntityRepository'; nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type
'com.mycompany.project1.batch.repositories.BDREntityRepository'
available: expected at least 1 bean which qualifies as autowire
candidate. Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
Caused by:
org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type
'com.mycompany.project1.batch.repositories.BDREntityRepository'
available: expected at least 1 bean which qualifies as autowire
candidate. Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
My main method has following
#SpringBootApplication
#ComponentScan(basePackages= {"com.mycompany.project1"})
public class RunApplication{
private static final Logger logger = Logger.getLogger(BatchController.class);
#Autowired
JobLauncher jobLauncher;
#Autowired
Job job;
/*
* jmxBean will get loaded when this managed bean is called from RMI, and it will fire batch execution
*/
public static void main(String[] args){
ApplicationContext app = SpringApplication.run(RunApplication.class, args);
logger.debug("Batch Application has been started...");
BatchController controller = app.getBean(BatchController.class);
//Start batch process when application starts or restart, its optional call and can be commented out
//as we have JMX to expose load method on demand
//BatchController batch = new BatchController();
controller.startBatchProessFromMain();
}
}
#Component
public class BatchDBWriter implements ItemWriter<BDREntity> {
private static final Logger logger = Logger.getLogger(BatchDBWriter.class);
#Autowired
private BDREntityRepository bDREntityRepository;
/*
* this method call the JPArepository's saveAll
* function and saves all the list of bdrEntitiesat a time.
*/
#Override
public void write(List<? extends BDREntity> bdrEntities) throws Exception {
bDREntityRepository.saveAll(bdrEntities);
}
}
How can i fix my Junit ?

Answer 1

You are using #WebMvcTest that is a test-slice annotation. It's specifically intended for testing the WebMvc-related components in your application and is a form of integration test.
You've said in the comments that you're not trying to integration test your application. In that case, you should not be using #SpringBootTest or any of the other #…Test annotations that are provided by Spring Boot.
Assuming that your goal is to unit test TokenServiceImpl, I'd expect your test class to look something like this:
public class TokenTest {
private final TokenServiceImpl tokenService = new TokenServiceImpl();
#Test
public void getOauthToken() {
String token = this.tokenService.getToken();
// Assertions to check the token go here
}
}