public async Task When_creating_a_new_game_with_a_name_valid_then_a_new_game_should_be_created()
{
var gamesRepository = Substitute.For <IGamesRepository>();
var createGameHandler = new CreateGameHandler(gamesRepository, Substitute.For <IUnitOfWork>());
var result = await createGameHandler.Handle(new CreateGame("Name"), default);
await gamesRepository.ReceivedWithAnyArgs(1).AnyAsync(default, default);
public void When_creating_a_game_with_existing_name_then_an_application_exception_should_be_thrown()
{
var gamesRepository = Substitute.For <IGamesRepository>();
gamesRepository.AnyAsync(Arg.Any <Expression <Func <Game, bool> > >(), default).Returns(Task.FromResult(true));
var createGameHandler = new CreateGameHandler(gamesRepository, Substitute.For <IUnitOfWork>());
Func <Task <Unit> > action = async() => await createGameHandler.Handle(new CreateGame("Name"), default);
action.Should().Throw <ApplicationException>().WithMessage(Messages.NameMustUnique);
}