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bpo-39200: Correct the error message for range() empty constructor (GH-17813)

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Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Pablo Galindo 2020-01-05 17:30:53 +00:00 • committed by GitHub
parent b121a4a45f
commit 4b66fa6ce9
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3 changed files with 58 additions and 28 deletions
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13
Lib/test/test_range.py
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@ -91,6 +91,19 @@ class RangeTest(unittest.TestCase):
r = range(-sys.maxsize, sys.maxsize, 2)
self.assertEqual(len(r), sys.maxsize)
def test_range_constructor_error_messages(self):
with self.assertRaisesRegex(
TypeError,
"range expected at least 1 argument, got 0"
):
range()
with self.assertRaisesRegex(
TypeError,
"range expected at most 3 arguments, got 6"
):
range(1, 2, 3, 4, 5, 6)
def test_large_operands(self):
x = range(10**20, 10**20+10, 3)
self.assertEqual(len(x), 4)