@Test
public void isInstanceAssigned() {

    assertTrue(scenarioGridSpy.isInstanceAssigned(FactIdentifier.DESCRIPTION));
    assertFalse(scenarioGridSpy.isInstanceAssigned(FactIdentifier.INDEX));
    assertFalse(scenarioGridSpy.isInstanceAssigned(FactIdentifier.EMPTY));
    assertTrue(scenarioGridSpy.isInstanceAssigned(factIdentifierGiven));
}