Merged revisions 87919 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r87919 | alexander.belopolsky | 2011-01-10 20:21:25 -0500 (Mon, 10 Jan 2011) | 4 lines

  Issue #1726687: time.mktime() will now correctly compute value one
  second before epoch.  Original patch by Peter Wang, reported by Martin
  Blais.
........
diff --git a/Lib/test/test_time.py b/Lib/test/test_time.py
index 8c1d8f8..d4f7d80 100644
--- a/Lib/test/test_time.py
+++ b/Lib/test/test_time.py
@@ -233,6 +233,15 @@
         t1 = time.mktime(lt1)
         self.assertTrue(0 <= (t1-t0) < 0.2)
 
+    def test_mktime(self):
+        # Issue #1726687
+        for t in (-2, -1, 0, 1):
+            try:
+                tt = time.localtime(t)
+            except (OverflowError, ValueError):
+                pass
+            self.assertEqual(time.mktime(tt), t)
+
 class TestLocale(unittest.TestCase):
     def setUp(self):
         self.oldloc = locale.setlocale(locale.LC_ALL)