@Test
public void getDefaultCoOwners_notExistingCoOwnerName() {

    String nonExistingCoOwnerNames = "test1,test2";
    when(campusConfigurationMock.getDefaultCoOwnerUserNames()).thenReturn(nonExistingCoOwnerNames);
    // Exercise
    List<Identity> coOwners = campuskursCoOwnersTestObject.getDefaultCoOwners();
    assertEquals("Wrong number of owners, must be 0 when no identities exist", 0, coOwners.size());
}