@Test(expected = IllegalArgumentException.class)
public void buildDerivedEntitySetWithoutEntitySet() {

  EdmEntityType derivedType = Mockito.mock(EdmEntityType.class);
  Mockito.when(derivedType.getFullQualifiedName()).thenReturn(new FullQualifiedName("Model", "VipCustomer"));
  ContextURLBuilder.create(ContextURL.with().derived(derivedType).build());
}