Try fix demo in freecell.

The color caplculation was wrong in py3. One char fix + tests:

https://github.com/shlomif/PySolFC/issues/42 .

pysollib/acard.py

@@ -66,7 +66,7 @@ class AbstractCard:
         self.id = id
         self.deck = deck
         self.suit = suit
-        self.color = suit / 2
+        self.color = suit // 2
         self.rank = rank
         self.game = game
         self.x = x

tests/board_gen/acard_unit.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+# Written by Shlomi Fish, under the MIT Expat License.
+
+# imports
+import sys
+from TAP.Simple import plan, ok
+
+from pysollib.acard import AbstractCard
+
+
+def shlomif_main(args):
+
+    plan(4)
+
+    card1 = AbstractCard(1001, 0, 1, 2, 3001)
+    # TEST
+    ok(card1.color == 0, 'card1.color is sane.')
+
+    # TEST
+    ok(card1.rank == 2, 'card1.rank')
+
+    card2 = AbstractCard(1001, 0, 3, 7, 3001)
+    # TEST
+    ok(card2.color == 1, 'card2.color is sane.')
+
+    # TEST
+    ok(card2.rank == 7, 'card2.rank')
+
+
+if __name__ == "__main__":
+    sys.exit(shlomif_main(sys.argv))