Use stdlib unittest for md5 instead of custom one (#222)

Makefile

@@ -92,6 +92,7 @@ STDLIB_TESTS := \
   test/test_list \
   test/test_slice \
   test/test_string \
+  test/test_md5 \
   threading_test \
   time_test \
   types_test \

testing/md5_test.py

-# Copyright 2016 Google Inc. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-import md5
-
-assert md5.new("").hexdigest() == 'd41d8cd98f00b204e9800998ecf8427e'
-assert md5.new("hello").hexdigest() == '5d41402abc4b2a76b9719d911017c592'

third_party/stdlib/test/test_md5.py

+# Testing md5 module
+import warnings
+warnings.filterwarnings("ignore", "the md5 module is deprecated.*",
+                        DeprecationWarning)
+
+import unittest
+# from md5 import md5
+import md5 as _md5
+md5 = _md5.md5
+from test import test_support
+
+def hexstr(s):
+    import string
+    h = string.hexdigits
+    r = ''
+    for c in s:
+        i = ord(c)
+        r = r + h[(i >> 4) & 0xF] + h[i & 0xF]
+    return r
+
+class MD5_Test(unittest.TestCase):
+
+    def md5test(self, s, expected):
+        self.assertEqual(hexstr(md5(s).digest()), expected)
+        self.assertEqual(md5(s).hexdigest(), expected)
+
+    def test_basics(self):
+        eq = self.md5test
+        eq('', 'd41d8cd98f00b204e9800998ecf8427e')
+        eq('a', '0cc175b9c0f1b6a831c399e269772661')
+        eq('abc', '900150983cd24fb0d6963f7d28e17f72')
+        eq('message digest', 'f96b697d7cb7938d525a2f31aaf161d0')
+        eq('abcdefghijklmnopqrstuvwxyz', 'c3fcd3d76192e4007dfb496cca67e13b')
+        eq('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
+           'd174ab98d277d9f5a5611c2c9f419d9f')
+        eq('12345678901234567890123456789012345678901234567890123456789012345678901234567890',
+           '57edf4a22be3c955ac49da2e2107b67a')
+
+    def test_hexdigest(self):
+        # hexdigest is new with Python 2.0
+        m = md5('testing the hexdigest method')
+        h = m.hexdigest()
+        self.assertEqual(hexstr(m.digest()), h)
+
+    def test_large_update(self):
+        aas = 'a' * 64
+        bees = 'b' * 64
+        cees = 'c' * 64
+
+        m1 = md5()
+        m1.update(aas)
+        m1.update(bees)
+        m1.update(cees)
+
+        m2 = md5()
+        m2.update(aas + bees + cees)
+        self.assertEqual(m1.digest(), m2.digest())
+
+def test_main():
+    test_support.run_unittest(MD5_Test)
+
+if __name__ == '__main__':
+    test_main()