bpo-42772: Step argument ignored when stop is None. (GH-24018)
diff --git a/Lib/test/test_random.py b/Lib/test/test_random.py
index 436f3c9..41a26e3 100644
--- a/Lib/test/test_random.py
+++ b/Lib/test/test_random.py
@@ -562,6 +562,14 @@ def test_randrange_argument_handling(self):
with self.assertRaises(ValueError):
randrange(10, 20, 1.5)
+ def test_randrange_step(self):
+ # bpo-42772: When stop is None, the step argument was being ignored.
+ randrange = self.gen.randrange
+ with self.assertRaises(TypeError):
+ randrange(1000, step=100)
+ with self.assertRaises(TypeError):
+ randrange(1000, None, step=100)
+
def test_randbelow_logic(self, _log=log, int=int):
# check bitcount transition points: 2**i and 2**(i+1)-1
# show that: k = int(1.001 + _log(n, 2))