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Diffstat (limited to 'Lib/test/test_math.py')
| -rw-r--r-- | Lib/test/test_math.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py index 6c4443540f..6c07c8801d 100644 --- a/Lib/test/test_math.py +++ b/Lib/test/test_math.py @@ -1042,6 +1042,15 @@ class MathTests(unittest.TestCase): accuracy_failure = acc_check(expected, got, rel_err = 5e-15, abs_err = 5e-15) + elif fn == 'erfc': + # erfc has less-than-ideal accuracy for large + # arguments (x ~ 25 or so), mainly due to the + # error involved in computing exp(-x*x). + # + # XXX Would be better to weaken this test only + # for large x, instead of for all x. + accuracy_failure = ulps_check(expected, got, 2000) + else: accuracy_failure = ulps_check(expected, got, 20) if accuracy_failure is None: |