Add tests.

Author: drvinceknight

axelrod/tests/unit/test_tournament.py

@@ -396,6 +396,10 @@ def test_build_result_set(self):
         results = tournament.play(progress_bar=False)
         self.assertIsInstance(results, axelrod.ResultSet)
 
+        # Test in memory
+        results = tournament.play(progress_bar=False, in_memory=True)
+        self.assertIsInstance(results, axelrod.ResultSet)
+
     def test_no_build_result_set(self):
         tournament = axelrod.Tournament(
             name=self.test_name,
@@ -472,6 +476,16 @@ def test_write_interactions(self):
         calls = tournament._write_interactions.call_args_list
         self.assertEqual(len(calls), 15)
 
+        # Test when runnning in memory
+        tournament._write_interactions = MagicMock(
+                    name='_write_interactions')
+        self.assertTrue(tournament.play(filename=self.filename,
+                                        progress_bar=False,
+                                        in_memory=True))
+        # Get the calls made to write_interactions
+        calls = tournament._write_interactions.call_args_list
+        self.assertEqual(len(calls), 15)
+
     def test_write_to_csv(self):
         tournament = axelrod.Tournament(
             name=self.test_name,