Cannot @Autowire configuration

Question

I am absolutely new to TestNG, Spring framework etc. and I'm trying to use the annotation @Value access to configuration file via the @Configuration annotation.

All I'm trying to achieve here is to make the console write out "hi" from the config file accessing the value via @Value. I must be obviously missing the whole point of the @Value annotation (or @Autowired or some other annotations) as all I'm gettting is java.lang.NullPointerException.

I have the following three files (reduced to the absolute minimum):

config.properties

a="hi"

TestConfiguration.java

@Configuration
@PropertySource("config.properties")
public class TestConfiguration {
    @Value("${a}")
    public String A;
}

TrialTest.java

public class TrialTest {
    @Autowired
    private TestConfiguration testConfiguration;

    @Test
    public void test() {
        System.out.println(testConfiguration.A);
   }
}

Thanks a lot.

Answer 1

Try annotate your test class with these:

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration(classes={TestConfiguration.class})

[Edit] sorry I didn't see that OP was using TestNG. The essential point is still that the problem is caused by Spring not being bootstrapped. In TestNG that can be done via extending AbstractTestNGSpringContextTests.