bpo-39200: Correct the error message for range() empty constructor (GH-17813)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
diff --git a/Lib/test/test_range.py b/Lib/test/test_range.py
index 73cbcc4..30fa129 100644
--- a/Lib/test/test_range.py
+++ b/Lib/test/test_range.py
@@ -91,6 +91,19 @@
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)