Add extra SHA tests

1 files changed, 19 insertions, 2 deletions

diff --git a/Lib/test/test_sha.py b/Lib/test/test_sha.py
index cad7780467..ea224e439c 100644
--- a/Lib/test/test_sha.py
+++ b/Lib/test/test_sha.py
@@ -5,15 +5,29 @@
 # http://www.itl.nist.gov/div897/pubs/fip180-1.htm
 
 import sha
-import test_support
 import unittest
+from test import test_support
 
 
 class SHATestCase(unittest.TestCase):
     def check(self, data, digest):
-        computed = sha.new(data).hexdigest()
+        # Check digest matches the expected value
+        obj = sha.new(data)
+        computed = obj.hexdigest()
         self.assert_(computed == digest)
 
+        # Verify that the value doesn't change between two consecutive
+        # digest operations.
+        computed_again = obj.hexdigest()
+        self.assert_(computed == computed_again)
+
+        # Check hexdigest() output matches digest()'s output
+        digest = obj.digest()
+        hexd = ""
+        for c in digest:
+            hexd += '%02x' % ord(c)
+        self.assert_(computed == hexd)
+
     def test_case_1(self):
         self.check("abc",
                    "a9993e364706816aba3e25717850c26c9cd0d89d")
@@ -26,6 +40,9 @@ class SHATestCase(unittest.TestCase):
         self.check("a" * 1000000,
                    "34aa973cd4c4daa4f61eeb2bdbad27316534016f")
 
+    def test_case_4(self):
+        self.check(chr(0xAA) * 80,
+                   '4ca0ef38f1794b28a8f8ee110ee79d48ce13be25')
 
 def test_main():
     test_support.run_unittest(SHATestCase)