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| author | Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> | 2018-04-05 17:19:44 +0200 |
|---|---|---|
| committer | Raymond Hettinger <rhettinger@users.noreply.github.com> | 2018-04-05 08:19:44 -0700 |
| commit | 091e95e9004b794280ab35becec2c3e30dd5e96e (patch) | |
| tree | 72be905acc5dd7a26b7a90a3d14efb58b99cbcad /Lib/test/test_random.py | |
| parent | 74940913d26d9f94b8572eca794369841fa6d9b6 (diff) | |
| download | cpython-git-091e95e9004b794280ab35becec2c3e30dd5e96e.tar.gz | |
bpo-33203: Ensure random.choice always raises IndexError on empty sequence (GH-6338)
Diffstat (limited to 'Lib/test/test_random.py')
| -rw-r--r-- | Lib/test/test_random.py | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Lib/test/test_random.py b/Lib/test/test_random.py index 468c4a467e..eee245df48 100644 --- a/Lib/test/test_random.py +++ b/Lib/test/test_random.py @@ -651,7 +651,10 @@ class MersenneTwister_TestBasicOps(TestBasicOps, unittest.TestCase): # Population range too large (n >= maxsize) self.gen._randbelow(maxsize+1, maxsize = maxsize) self.gen._randbelow(5640, maxsize = maxsize) - + # issue 33203: test that _randbelow raises ValueError on + # n == 0 also in its getrandbits-independent branch. + with self.assertRaises(ValueError): + self.gen._randbelow(0, maxsize=maxsize) # This might be going too far to test a single line, but because of our # noble aim of achieving 100% test coverage we need to write a case in # which the following line in Random._randbelow() gets executed: |