A test class written in JUnit4

StudentServiceJUnit4Test.java

import com.madadipouya.junit5.service.StudentService;
import com.madadipouya.junit5.service.CourseService;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;

import static org.mockito.Mockito.*;
import static org.junit.Assert.assertEquals;

@RunWith(MockitoJUnitRunner.class)
public class StudentServiceJUnit4Test {

    @InjectMocks
    private StudentService studentService;

    @Mock
    private CourseService courseService;

    @Test
    public void testCalculatingCGPA() {
        long studentId = 1L
        when(courseService.getAllCoursesByStudentId(anyLong())).thenReturn(stubCourses());
        
        long cGPA = studentService.getCGPA(studentId);

        verify(courseService, times(1)).getAllCoursesByStudentId(anyLong());
        assertEquals("3.4", cGPA);
    }
}