public void RemoveFriendRequestTest()
{
var request = new FriendRequestDummyCreator().Create();
friendService.RemoveRequest(request);
friendRepository.Verify(m => m.Add(It.IsAny <Friend>()), Times.Never);
friendRepository.Verify(m => m.RemoveFriendshipRequest(It.Is <FriendRequest>(r => r == request)), Times.Once);
warningService.Verify(m => m.AddWarning(It.IsAny <int>(), It.IsAny <string>()), Times.Once);
}