tests: Clarify which minimize_source samples are the reference

tests/minimize_source_test.py

@@ -16,29 +16,38 @@ def read_sample(fname):
 class MinimizeSource(unittest2.TestCase):
     def test_class(self):
         original = read_sample('class.py')
-        minimized = read_sample('class_min.py')
-        self.assertEquals(minimized, minimize_source(original))
+        expected = read_sample('class_min.py')
+        self.assertEqual(expected, minimize_source(original))
 
+    def test_comment(self):
+        original = read_sample('comment.py')
+        expected = read_sample('comment_min.py')
+        self.assertEqual(expected, minimize_source(original))
 
     def test_def(self):
         original = read_sample('def.py')
-        minimized = read_sample('def_min.py')
-        self.assertEquals(minimized, minimize_source(original))
+        expected = read_sample('def_min.py')
+        self.assertEqual(expected, minimize_source(original))
 
     def test_hashbang(self):
         original = read_sample('hashbang.py')
-        minimized = read_sample('hashbang_min.py')
-        self.assertEquals(minimized, minimize_source(original))
+        expected = read_sample('hashbang_min.py')
+        self.assertEqual(expected, minimize_source(original))
 
     def test_mod(self):
         original = read_sample('mod.py')
-        minimized = read_sample('mod_min.py')
-        self.assertEquals(minimized, minimize_source(original))
+        expected = read_sample('mod_min.py')
+        self.assertEqual(expected, minimize_source(original))
+
+    def test_pass(self):
+        original = read_sample('pass.py')
+        expected = read_sample('pass_min.py')
+        self.assertEqual(expected, minimize_source(original))
 
     def test_obstacle_course(self):
         original = read_sample('obstacle_course.py')
-        minimized = read_sample('obstacle_course_min.py')
-        self.assertEquals(minimized, minimize_source(original))
+        expected = read_sample('obstacle_course_min.py')
+        self.assertEqual(expected, minimize_source(original))
 
 
 if __name__ == '__main__':