public async Task When_creating_a_game_with_a_name_valid_then_a_new_game_should_be_created()
{
var gamesRepository = Substitute.For <IGamesRepository>();
gamesRepository.AnyAsync(Arg.Any <Expression <Func <Game, bool> > >(), default).Returns(Task.FromResult(false));
var createNewGame = new CreateNewGame(gamesRepository);
var result = await createNewGame.Execute(NAME, default);
result.Should().NotBeNull();
}
public void When_creating_a_game_with_existing_name_then_a_domain_exception_should_be_thrown()
{
var gamesRepository = Substitute.For <IGamesRepository>();
gamesRepository.AnyAsync(Arg.Any <Expression <Func <Game, bool> > >(), default).Returns(Task.FromResult(true));
var createNewGame = new CreateNewGame(gamesRepository);
Func <Task <Game> > action = async() => await createNewGame.Execute(NAME, default);
action.Should().Throw <DomainException>().WithMessage(Game.NAME_MUST_UNIQUE);
}