Add is_defector attribute to tests

Author: souravsingh

axelrod/tests/strategies/test_titfortat.py

@@ -622,26 +622,28 @@ def test_strategy(self):
         self.second_play_test(rCC=C, rCD=D, rDC=C, rDD=D)
 
         actions = [(C, C), (C, C), (C, C), (D, C)]
-        self.versus_test(axelrod.Cooperator(), expected_actions=actions)
+        self.versus_test(axelrod.Cooperator(), expected_actions=actions,
+                         attrs={"is_defector": False})
 
         actions = [(C, C), (C, C), (C, C), (C, C)]
         self.versus_test(axelrod.Cooperator(), expected_actions=actions,
+                         attrs={"is_defector": False},
                          match_attributes={"length": -1})
 
 
         # Plays TfT and defects in last round
         actions = [(C, C), (C, D), (D, C), (C, D), (D, C), (D, D)]
-        self.versus_test(axelrod.Alternator(), expected_actions=actions)
+        self.versus_test(axelrod.Alternator(), expected_actions=actions
+                         attrs={"is_defector": False},)
 
         actions = [(C, C), (C, D), (D, C), (C, D), (D, C), (C, D)]
         self.versus_test(axelrod.Alternator(), expected_actions=actions,
+                         attrs={"is_defector": False}
                          match_attributes={"length": -1})
 
-        actions = [(C, C), (C, D), (D, C), (C, D), (D, C), (D, D)]
-        self.versus_test(axelrod.Alternator(), expected_actions=actions)
-
         # Becomes defector after 5 defections
         opponent = axelrod.MockPlayer(actions=[C, D, D, D, D, D, C, C])
         actions = [(C, C), (C, D), (D, D), (D, D),
                    (D, D), (D, D), (D, C), (D, C)]
-        self.versus_test(opponent, expected_actions=actions)
+        self.versus_test(opponent, expected_actions=actions
+                         attrs={"is_defector": True})