public void ContainsPlayers_ReturnsTrueIfBothPlayersExistInPairing()
        {
            var pairing = new Pairing(P1, P2);

            Assert.False(pairing.ContainsPlayers(P1, P3));
            Assert.False(pairing.ContainsPlayers(P3, P2));
            Assert.True(pairing.ContainsPlayers(P1, P2));
            Assert.True(pairing.ContainsPlayers(P2, P1));
        }
        public void ContainsPlayer_ReturnsTrueIfPlayerIsInPairing()
        {
            var players = new[] { P1, P2, P3 };
            var pairing = new Pairing(players[0], players[1]);

            Assert.True(pairing.ContainsPlayers(players[0]));
            Assert.True(pairing.ContainsPlayers(players[1]));
            Assert.False(pairing.ContainsPlayers(players[2]));
            Assert.False(pairing.ContainsPlayers(new Player { Name = "foo" }));
        }