public void ItClearsTheNemesisIfTheNewNemesisIsNullAndOneAlreadyExisted()
{
_playerRepositoryMock.Expect(mock => mock.GetNemesisData(_playerId))
.Return(new NullNemesisData());
_nemesisRecalculator.RecalculateNemesis(_playerId, _currentUser);
_dataContextMock.AssertWasCalled(mock => mock.Save<Player>(
Arg<Player>.Matches(player => player.NemesisId == null),
Arg<ApplicationUser>.Is.Equal(_currentUser)));
}