Prevent Application / CommandLineRunner classes from executing during JUnit testing

Question

If in your TestCase class there is this annotations:

@SpringApplicationConfiguration(classes = {Application.class}) 

this will cause the Application.class, implementing the CommandLineRunner interface, to run the required method

public void run(String... args) throws Exception 

I still think this is, mostly, a not wanted behaviour, since in your test environment you may not want to launch the entire application.

I have in mind two solution to circumvent this problem:

1. to remove the CommandLineRunner interface from my Application class
2. to have a different context for testing

Both this solution requires lot of coding. Do you have a more convenient solution?

Answer 1

Jan's solution can be achieved easier.

In your test class, activate the "test" profile:

@RunWith(SpringJUnit4ClassRunner.class) @ActiveProfiles("test") public class MyFancyTest {} 

In your CommandLineRunner set the profile to NOT test:

@Component @Profile("!test") public class JobCommandLineRunner implements CommandLineRunner {} 

Then you don't have to manually set the profile in the Application.

Answer 2

As mentioned in spring documentation http://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-testing.html you can use @ContextConfiguration with a special initializer:

ConfigFileApplicationContextInitializer is an ApplicationContextInitializer that can apply to your tests to load Spring Boot application.properties files. You can use this when you don’t need the full features provided by @SpringApplicationConfiguration.

In this example anyComponent is initialized and properties are injected, but run(args) methods won't be executed. (Application.class is my main spring entry point)

@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(classes = Application.class,                        initializers = ConfigFileApplicationContextInitializer.class) public class ExtractorTest {     @Autowired     AnyComponent anyComponent;      @Test     public void testAnyComponent() {        anyComponent.anyMethod(anyArgument);     } }