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Issue #18137: Detect integer overflow on precision in float.__format__() and

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complex.__format__().
This commit is contained in:
Victor Stinner 2013-06-23 14:54:30 +02:00
parent da30acf50b
commit 2f084ecfe7
3 changed files with 34 additions and 2 deletions
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17
Lib/test/test_format.py
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@ -312,6 +312,23 @@ class FormatTest(unittest.TestCase):
def test_main():
support.run_unittest(FormatTest)
def test_precision(self):
INT_MAX = 2147483647
f = 1.2
self.assertEqual(format(f, ".0f"), "1")
self.assertEqual(format(f, ".3f"), "1.200")
with self.assertRaises(ValueError) as cm:
format(f, ".%sf" % (INT_MAX + 1))
self.assertEqual(str(cm.exception), "precision too big")
c = complex(f)
self.assertEqual(format(f, ".0f"), "1")
self.assertEqual(format(f, ".3f"), "1.200")
with self.assertRaises(ValueError) as cm:
format(f, ".%sf" % (INT_MAX + 1))
self.assertEqual(str(cm.exception), "precision too big")
if __name__ == "__main__":
unittest.main()