diff options
Diffstat (limited to 'Lib/test/support.py')
| -rw-r--r-- | Lib/test/support.py | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/Lib/test/support.py b/Lib/test/support.py index b03069c40e..6724e9b101 100644 --- a/Lib/test/support.py +++ b/Lib/test/support.py @@ -48,7 +48,7 @@ __all__ = [ "threading_cleanup", "reap_children", "cpython_only", "check_impl_detail", "get_attribute", "swap_item", "swap_attr", "requires_IEEE_754", "TestHandler", "Matcher", "can_symlink", "skip_unless_symlink", - "import_fresh_module", "requires_zlib" + "import_fresh_module", "requires_zlib", "PIPE_MAX_SIZE" ] class Error(Exception): @@ -409,6 +409,13 @@ def _is_ipv6_enabled(): IPV6_ENABLED = _is_ipv6_enabled() + +# A constant likely larger than the underlying OS pipe buffer size. +# Windows limit seems to be around 512B, and most Unix kernels have a 64K pipe +# buffer size: take 1M to be sure. +PIPE_MAX_SIZE = 1024 * 1024 + + # decorator for skipping tests on non-IEEE 754 platforms requires_IEEE_754 = unittest.skipUnless( float.__getformat__("double").startswith("IEEE"), |