Reorganize and cleanup tests

llvm/tests/support.py

@@ -0,0 +1,34 @@
+import sys
+import unittest
+import contextlib
+from llvm.tests import tests, isolated_tests # re-expose symbol
+
+IS_PY3K = sys.version_info[0] >= 3
+BITS = tuple.__itemsize__ * 8
+
+if sys.version_info[:2] <= (2, 6):
+    # create custom TestCase
+    class TestCase(unittest.TestCase):
+        def assertIn(self, item, container):
+            self.assertTrue(item in container)
+
+        def assertNotIn(self, item, container):
+            self.assertFalse(item in container)
+
+        def assertLess(self, a, b):
+            self.assertTrue(a < b)
+
+        def assertIs(self, a, b):
+            self.assertTrue(a is b)
+
+        @contextlib.contextmanager
+        def assertRaises(self, exc):
+            try:
+                yield
+            except exc:
+                pass
+            else:
+                raise self.failureException("Did not raise %s" % exc)
+
+else:
+    TestCase = unittest.TestCase