Use different Spring test context configuration for different test methods

Question

We have a Spring based JUnit test class which is utilizing an inner test context configuration class

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguratio         


        

Answer 1

With Aaron's suggestion of manually building the context I couldn't find any good examples so after spending some time getting it working I thought I'd post a simple version of the code I used in case it helps anyone else:

class MyTest {

    @Autowired
    private SomeService service;
    @Autowired
    private ConfigurableApplicationContext applicationContext;

    public void init(Class testClass) throws Exception {
        TestContextManager testContextManager = new TestContextManager(testClass);
        testContextManager.prepareTestInstance(this);
    }

    @After
    public void tearDown() throws Exception {
        applicationContext.close();
    }

    @Test
    public void test1() throws Exception {
        init(ConfigATest.class);
        service.doSomething();
        // assert something
    }

    @Test
    public void test2() throws Exception {
        init(ConfigBTest.class);
        service.doSomething();
        // assert something
    }

    @ContextConfiguration(classes = {
        ConfigATest.ConfigA.class
    })
    static class ConfigATest {
        static class ConfigA {
            @Bean
            public SomeService someService() {
                return new SomeService(new A());
            }
        }
    }

    @ContextConfiguration(classes = {
        ConfigBTest.ConfigB.class
    })
    static class ConfigBTest {
        static class ConfigB {
            @Bean
            public SomeService someService() {
                return new SomeService(new B());
            }
        }

    }
}