Issue #7070: Fix problem with builtin round function for large odd
integer arguments. Also fixes the sign of round(-0.0).
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index d8e6041..04c2216 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -1,5 +1,6 @@
# Python test set -- built-in functions
+import platform
import test.test_support, unittest
from test.test_support import fcmp, have_unicode, TESTFN, unlink, \
run_unittest, run_with_locale
@@ -1259,6 +1260,14 @@
self.assertRaises(TypeError, round, t)
self.assertRaises(TypeError, round, t, 0)
+ def test_round_large(self):
+ # Issue #1869: integral floats should remain unchanged
+ self.assertEqual(round(5e15-1), 5e15-1)
+ self.assertEqual(round(5e15), 5e15)
+ self.assertEqual(round(5e15+1), 5e15+1)
+ self.assertEqual(round(5e15+2), 5e15+2)
+ self.assertEqual(round(5e15+3), 5e15+3)
+
def test_setattr(self):
setattr(sys, 'spam', 1)
self.assertEqual(sys.spam, 1)