Combine the functionality of test_support.run_unittest()
and test_support.run_classtests() into run_unittest()
and use it wherever possible.

Also don't use "from test.test_support import ...", but
"from test import test_support" in a few spots.

From SF patch #662807.
diff --git a/Lib/test/test_base64.py b/Lib/test/test_base64.py
index dfd67a3..f9f75f0 100644
--- a/Lib/test/test_base64.py
+++ b/Lib/test/test_base64.py
@@ -1,16 +1,16 @@
-from unittest import TestCase
-from test.test_support import vereq, run_unittest
-from base64 import encodestring, decodestring
+import unittest
+from test import test_support
+import base64
 
-class Base64TestCase(TestCase):
+class Base64TestCase(unittest.TestCase):
 
     def test_encodestring(self):
-        vereq(encodestring("www.python.org"), "d3d3LnB5dGhvbi5vcmc=\n")
-        vereq(encodestring("a"), "YQ==\n")
-        vereq(encodestring("ab"), "YWI=\n")
-        vereq(encodestring("abc"), "YWJj\n")
-        vereq(encodestring(""), "")
-        vereq(encodestring("abcdefghijklmnopqrstuvwxyz"
+        self.assertEqual(base64.encodestring("www.python.org"), "d3d3LnB5dGhvbi5vcmc=\n")
+        self.assertEqual(base64.encodestring("a"), "YQ==\n")
+        self.assertEqual(base64.encodestring("ab"), "YWI=\n")
+        self.assertEqual(base64.encodestring("abc"), "YWJj\n")
+        self.assertEqual(base64.encodestring(""), "")
+        self.assertEqual(base64.encodestring("abcdefghijklmnopqrstuvwxyz"
                            "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
                            "0123456789!@#0^&*();:<>,. []{}"),
               "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
@@ -18,20 +18,20 @@
               "Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==\n")
 
     def test_decodestring(self):
-        vereq(decodestring("d3d3LnB5dGhvbi5vcmc=\n"), "www.python.org")
-        vereq(decodestring("YQ==\n"), "a")
-        vereq(decodestring("YWI=\n"), "ab")
-        vereq(decodestring("YWJj\n"), "abc")
-        vereq(decodestring("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
+        self.assertEqual(base64.decodestring("d3d3LnB5dGhvbi5vcmc=\n"), "www.python.org")
+        self.assertEqual(base64.decodestring("YQ==\n"), "a")
+        self.assertEqual(base64.decodestring("YWI=\n"), "ab")
+        self.assertEqual(base64.decodestring("YWJj\n"), "abc")
+        self.assertEqual(base64.decodestring("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
                            "RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0\nNT"
                            "Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==\n"),
               "abcdefghijklmnopqrstuvwxyz"
               "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
               "0123456789!@#0^&*();:<>,. []{}")
-        vereq(decodestring(''), '')
+        self.assertEqual(base64.decodestring(''), '')
 
 def test_main():
-    run_unittest(Base64TestCase)
+    test_support.run_unittest(Base64TestCase)
 
 if __name__ == "__main__":
     test_main()