Add specific test for TfT

Author: drvinceknight

axelrod/tests/strategies/test_axelrod_first.py

@@ -186,7 +186,6 @@ def test_strategy(self):
         )
 
         # Test recognition of random player
-
         expected_attrs = {
             "opponent_is_random": False,
             "next_random_defection_turn": None,
@@ -217,6 +216,15 @@ def test_strategy(self):
             axelrod.Alternator(), expected_actions=actions, attrs=expected_attrs
         )
 
+        # Test versus TfT
+        expected_attrs = {"opponent_is_random": False, "next_random_defection_turn": None}
+        actions = [(C, C)] * 50 + [(D, C)]  # 51 turns
+        actions += [(C, D), (D, C)] * 3 # 56 turns
+        actions += [(C, D), (D, C)] * 50
+        self.versus_test(
+            axelrod.TitForTat(), expected_actions=actions, seed=0, attrs=expected_attrs
+        )
+
         # Test random defections
         expected_attrs = {"opponent_is_random": False, "next_random_defection_turn": 78}
         actions = [(C, C)] * 50 + [(D, C)] + [(C, C)] * 16 + [(D, C)] + [(C, C)]