Execute Log4j Logger statements in JUNIT to increase the code coverage

Execute Log4j Logger statements in JUNIT to increase the code coverage

Let us have a Student class

class Student{

    private static final Logger LOGGER = Logger
            .getLogger(Student.class);
    public void showStudent(){
        LOGGER.debug("Enter in showStudent method");
        /*
            Method Body
        */
        LOGGER.debug("Exit from showStudent method");
    }
}

Let us have another Test class StudentTest, which test the functionality of Student class

class StudentTest extends TestCase {

    private static final Logger LOGGER = Logger
            .getLogger(Student.class);
    Student student;       
    @Before
    public void setUp() throws Exception {
        student = new Student();
        LOGGER.setLevel(Level.DEBUG);
    }
   
    @Test
    public void testShowStudent(){
        student.showStudent();
    }
}

In this class we create a Logger object, and pass Student.class as an argument.
    private static final Logger LOGGER = Logger
            .getLogger(Student.class);
           
and set loglevel in setUp() method
    LOGGER.setLevel(Level.DEBUG);
   
Now when we execute student.showStudent() method in our test case then its logger statements also executes because we create an instance of Logger object and set its level to debug (i.e. Level.DEBUG)