public void TestAlternatingColors( )
{
CardCollection coll = new CardCollection( );
// An empty one is also alternating:
Assert.AreEqual( coll.IsAlternatingColors( ), true );
coll.Add( new Card( Suit.Clubs, 10, true, null ) );
// So is a collection of only one element:
Assert.AreEqual( coll.IsAlternatingColors( ), true );
// Then, add a few cards of alternating colors:
coll.Add( new Card( Suit.Diamonds, 11, true, null ) );
coll.Add( new Card( Suit.Clubs, 7, true, null ) );
coll.Add( new Card( Suit.Diamonds, 11, true, null ) );
coll.Add( new Card( Suit.Spades, 7, true, null ) );
coll.Add( new Card( Suit.Hearts, 11, true, null ) );
coll.Add( new Card( Suit.Clubs, 7, true, null ) );
// This should hold:
Assert.AreEqual( coll.IsAlternatingColors( ), true );
// Finally, remove a card in the middle:
coll.RemoveAt( 2 );
// ... which should make it no longer alternating:
Assert.AreEqual( coll.IsAlternatingColors( ), false );
}
/// <summary>
/// Override this to ensure we don't add cards to the pile
/// which are not allowed there.
/// </summary>
/// <param name="cards"></param>
/// <returns></returns>
public override bool AddCards( CardCollection cards )
{
if ( cards.Count > 0 )
{
if ( base.Count == 0 )
{
// If there are currently no cards in this pile,
// we only allow adding a collection of cards
// that starts with a king:
if ( cards[ 0 ].Rank != 13 )
{
return false;
}
}
else
{
// Otherwise, if there are cards on this pile,
// only allow a collection of cards to be added
// if the first card there has rank one lower
// than our topmost card (6 can go on 7 etc.)
if ( base.TopCard.Rank != cards[0].Rank + 1 )
{
return false;
}
// Also, the cards must not both be red/black:
if ( !base.TopCard.IsOppositeColor( cards[ 0 ] ) )
{
return false;
}
}
// And now to the final condition:
if ( cards.IsAlternatingColors( ) )
{
return base.AddCards( cards );
}
}
return false;
}
