Junit5 Logger

[arvindpandey]

Hi Team,

How to cover Logger.info(....), Logger.debug() etc using JUNIT5. I tried to search online but could not get a sample example.

and in our Main Class, we have below line for Logger object:

private static final Logger LOGGER= LoggerFactory.getLogger(MyMainClass.class);

An example reference will be appreciated.

Thank you.

[JyothirmaiAd]

Below is the example snippet how to use logger with info similarly u can use for other levels too debug/error.

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Model(adaptables = SlingHttpServletRequest.class)
public class GetUrl {
    private static final Logger LOG = LoggerFactory.getLogger(GetUrl.class);
  @RequestAttribute
    @default(values = StringUtils.EMPTY)
    @getter
    private String linkUrl;
 @PostConstruct
    private void init() {
 LOG.info("Inside init method");
}
}

[MukeshYadav_]

Hi @arvindpandey , 

You may try /get help from default sample code provided by Adobe.

private TestLogger logger = TestLoggerFactory.getTestLogger(fixture.getClass());

@ExtendWith(AemContextExtension.class)
class SimpleScheduledTaskTest {

    private SimpleScheduledTask fixture = new SimpleScheduledTask();

    private TestLogger logger = TestLoggerFactory.getTestLogger(fixture.getClass());

    @BeforeEach
    void setup() {
        TestLoggerFactory.clear();
    }

    @Test
    void run() {
        SimpleScheduledTask.Config config = mock(SimpleScheduledTask.Config.class);
        when(config.myParameter()).thenReturn("parameter value");

        fixture.activate(config);
        fixture.run();

        List<LoggingEvent> events = logger.getLoggingEvents();
        assertEquals(1, events.size());
        LoggingEvent event = events.get(0);
        assertEquals(Level.DEBUG, event.getLevel());
        assertEquals(1, event.getArguments().size());
        assertEquals("parameter value", event.getArguments().get(0));
    }
}

[MukeshYadav_]

Hi,

You may try static mocking as well but for this need to enable mock-maker-inline

Logger mockedLogger = Mockito.mock(Logger.class);

Ref- https://stackoverflow.com/questions/66816515/how-to-mock-logger-when-created-with-the-slf4j-annotati...

[NitroHazeDev]

Were you able to resolve it ? I managed to create a test logger and it just resolved it 

[kautuk_sahni]

@arvindpandey Did you find the suggestion helpful? Please let us know if you require more information. Otherwise, please mark the answer as correct for posterity. If you've discovered a solution yourself, we would appreciate it if you could share it with the community. Thank you!