public async Task Given_A_DeckSearchByUsernameCriteria_Should_Invoke_Search_Once()
{
// Arrange
const int expected = 1;
_deckRepository.Search(Arg.Any <DeckSearchByUsernameCriteria>()).Returns(new DeckSearchResult());
// Act
await _sut.Search(new DeckSearchByUsernameCriteria());
// Assert
await _deckRepository.Received(expected).Search(Arg.Any <DeckSearchByUsernameCriteria>());
}