@Test
public void getDefaultCoOwners_emptyCoOwnerNames() {

    String EMPTY_CO_OWNER_NAMES = "";
    when(campusConfigurationMock.getDefaultCoOwnerUserNames()).thenReturn(EMPTY_CO_OWNER_NAMES);
    // Exercise
    List<Identity> coOwners = campuskursCoOwnersTestObject.getDefaultCoOwners();
    assertEquals("Wrong number of owners, must 0 when value is empty", 0, coOwners.size());
}