public void Delete_Returns_True_If_Found_And_Deleted()
{
//Arrange
var id = A <int>();
var notification = new UserNotification();
_repository.Setup(x => x.GetByKey(id)).Returns(notification);
//Act
var deleted = _sut.DeleteById(id);
//Assert
_repository.Verify(x => x.Delete(notification), Times.Once);
Assert.True(deleted.IsNone);
VerifySaved();
}