public void RemoveRangeMustRemoveEntitiesWhenCalled() { Person person = new Person { FirstName = "Bob", LastName = "Smith" }; MockDbSet <Person> persons = new MockDbSet <Person>(new[] { person }); Assert.Contains(persons, x => x.Id == person.Id); persons.RemoveRange(person); Assert.DoesNotContain(persons, x => x.Id == person.Id); }