@Test
	public void addActivityTest() {

		Activity activity = new Activity("Baloncesto Primaria", 10,
				new BigDecimal(20.0), new BigDecimal(0), new HashSet<Student>());

		try {
			activityService.create(activity);
		} catch (DuplicateInstanceException e) {
			fail("Duplicated activity");
		}

		assertTrue(activityService.getActivities().contains(activity));

	}