@Test
	public void enrollementStudentInActivityTest() {
		Student s = null;
		Activity a = null;
		try {
			s = familyService.findStudent(1);
			a = activityService.find(1);
		} catch (InstanceNotFoundException e) {
			fail("Activity not exists");
		}
		activityService.enrollmentStudentInActivity(s, a);
		assertTrue("Student isn't enrolled in the activity", s.getActivities()
				.contains(a));
		assertTrue("Activity hasn't the student enrolled", a.getStudents()
				.contains(s));

	}