Junit assert log statements

BaseTest.java

public class BaseTest {
    final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);

    @Mock
    protected Appender mockAppender;

    @Captor
    protected ArgumentCaptor<LoggingEvent> captorLoggingEvent;

    @Before
    public void setup() throws Exception {
        MockitoAnnotations.initMocks(this);
        logger.addAppender(mockAppender);
    }

    @After
    public void teardown() {
        logger.detachAppender(mockAppender);
    }

    protected void assertInLogMessages(Level level, String errorText, boolean checkStacktrace) {
        if (isEmpty(errorText))
            fail("Error text should not be empty");

        verify(mockAppender, atLeastOnce()).doAppend(captorLoggingEvent.capture());
        boolean isFound = false;
        LoggingEvent loggingEventMatched = null;
        for (LoggingEvent loggingEvent : captorLoggingEvent.getAllValues()) {
            if (level == loggingEvent.getLevel() &&
                    loggingEvent.getMessage() != null &&
                    loggingEvent.getMessage().contains(errorText)) {
                isFound = true;
                loggingEventMatched = loggingEvent;
            }
        }
        // fail if error not found in logs
        String assertFailureMessage = format("Not in logfile: Level='%s' Error='%s'", level, errorText);
        assertTrue(assertFailureMessage, isFound);

        // ensure logged event has stacktrace
        if (checkStacktrace)
            assertNotNull(loggingEventMatched.getThrowableProxy().getStackTraceElementProxyArray());
    }

}