tests: Add unittest aliases to Python 2.7

tests/test_cli.py

@@ -71,6 +71,11 @@ class CommandLineTestCase(unittest.TestCase):
     def setUpClass(cls):
         super(CommandLineTestCase, cls).setUpClass()
 
+        # https://docs.python.org/3/library/unittest.html#deprecated-aliases
+        if sys.version_info < (3, 2):
+            cls.assertRegex = cls.assertRegexpMatches
+            cls.assertRaisesRegex = cls.assertRaisesRegexp
+
         cls.wd = build_temp_workspace({
             # .yaml file at root
             'a.yaml': '---\n'

tests/test_config.py

@@ -31,6 +31,15 @@ from yamllint import config
 
 
 class SimpleConfigTestCase(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        super(SimpleConfigTestCase, cls).setUpClass()
+
+        # https://docs.python.org/3/library/unittest.html#deprecated-aliases
+        if sys.version_info < (3, 2):
+            cls.assertRegex = cls.assertRegexpMatches
+            cls.assertRaisesRegex = cls.assertRaisesRegexp
+
     def test_parse_config(self):
         new = config.YamlLintConfig('rules:\n'
                                     '  colons:\n'

tests/test_module.py

@@ -26,6 +26,15 @@ PYTHON = sys.executable or 'python'
 
 
 class ModuleTestCase(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        super(ModuleTestCase, cls).setUpClass()
+
+        # https://docs.python.org/3/library/unittest.html#deprecated-aliases
+        if sys.version_info < (3, 2):
+            cls.assertRegex = cls.assertRegexpMatches
+            cls.assertRaisesRegex = cls.assertRaisesRegexp
+
     def setUp(self):
         self.wd = tempfile.mkdtemp(prefix='yamllint-tests-')