public void TennisGame_Ctor_Should_Throw_InvalidOperationException_If_Two_Players_Are_The_Same()
{
var player1 = new TennisPlayer("foo");
var player2 = new TennisPlayer("foo");
Assert.Throws <InvalidOperationException>(() => new TennisGame(player1, player2));
}
public TennisGame(TennisPlayer fistPlayer, TennisPlayer secondPlayer)
{
if (fistPlayer == default(TennisPlayer))
{
throw new ArgumentNullException("fistPlayer");
}
if (secondPlayer == default(TennisPlayer))
{
throw new ArgumentNullException("secondPlayer");
}
if (fistPlayer == secondPlayer)
{
throw new InvalidOperationException("A tennis game needs to be played by two different players.");
}
_fistPlayer = fistPlayer;
_secondPlayer = secondPlayer;
}