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bpo-678264/gh-37883: Fix test_resource failures with file size limits
This fixes the long-standing issue where test_resource would fail on systems with file size limitations. The solution includes: - ResourceLimitHelper class for safe limit manipulation - Dynamic test sizing based on available resources - Conditional test skipping with clear messages - Comprehensive error handling for various platforms Tests now adapt to system constraints rather than failing. Fixes #37883
This commit is contained in:
Ritesh Kudkelwar
parent
ede5693be1
commit
eb6405e116
1 changed files with 348 additions and 227 deletions
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@ -1,258 +1,379 @@
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import contextlib
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"""Tests for the resource module.
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This test module has been updated to handle systems with file size limits
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properly, fixing the long-standing issue #37883 (bpo-678264).
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"""
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import sys
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import os
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import time
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import unittest
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import errno
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import tempfile
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import contextlib
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from test import support
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from test.support import import_helper
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from test.support import os_helper
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import time
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from test.support.os_helper import temp_dir, unlink, TESTFN
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resource = import_helper.import_module('resource')
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# This test is checking a few specific problem spots with the resource module.
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class ResourceLimitHelper:
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"""Helper class to safely manage resource limits during testing."""
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def __init__(self, limit_type):
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self.limit_type = limit_type
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self.original_limits = None
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self.limit_name = self._get_limit_name(limit_type)
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def _get_limit_name(self, limit_type):
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"""Get human-readable name for resource limit."""
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names = {
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resource.RLIMIT_FSIZE: "file size",
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resource.RLIMIT_CPU: "CPU time",
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resource.RLIMIT_DATA: "data segment size",
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resource.RLIMIT_STACK: "stack size",
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resource.RLIMIT_CORE: "core file size",
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}
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if hasattr(resource, 'RLIMIT_RSS'):
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names[resource.RLIMIT_RSS] = "resident set size"
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if hasattr(resource, 'RLIMIT_NPROC'):
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names[resource.RLIMIT_NPROC] = "number of processes"
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if hasattr(resource, 'RLIMIT_NOFILE'):
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names[resource.RLIMIT_NOFILE] = "number of open files"
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if hasattr(resource, 'RLIMIT_MEMLOCK'):
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names[resource.RLIMIT_MEMLOCK] = "locked memory"
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if hasattr(resource, 'RLIMIT_AS'):
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names[resource.RLIMIT_AS] = "address space"
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return names.get(limit_type, f"resource {limit_type}")
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def __enter__(self):
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self.original_limits = resource.getrlimit(self.limit_type)
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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if self.original_limits:
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try:
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resource.setrlimit(self.limit_type, self.original_limits)
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except (ValueError, OSError, PermissionError):
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pass
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return False
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def can_set_limit(self, soft_limit, hard_limit=None):
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"""Check if we can set the specified limit."""
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if hard_limit is None:
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hard_limit = self.original_limits[1]
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if soft_limit > hard_limit:
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return False
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if hard_limit > self.original_limits[1] and hard_limit != resource.RLIM_INFINITY:
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return False
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try:
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resource.setrlimit(self.limit_type, (soft_limit, hard_limit))
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resource.setrlimit(self.limit_type, self.original_limits)
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return True
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except (ValueError, OSError, PermissionError):
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return False
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def get_safe_test_limit(self, desired_size, minimum_size=1024):
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"""Calculate a safe limit for testing."""
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soft, hard = self.original_limits
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if soft == resource.RLIM_INFINITY:
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return (desired_size, True)
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if soft < minimum_size:
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return (0, False)
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safe_size = min(desired_size, int(soft * 0.8))
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if safe_size < minimum_size:
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safe_size = minimum_size
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return (safe_size, safe_size <= soft)
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def skip_if_resource_limited(limit_type, minimum_required):
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"""Decorator to skip test if resource limit is too restrictive."""
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def decorator(test_func):
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def wrapper(self):
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soft, hard = resource.getrlimit(limit_type)
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if soft != resource.RLIM_INFINITY and soft < minimum_required:
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helper = ResourceLimitHelper(limit_type)
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self.skipTest(
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f"{helper.limit_name} limit too small: "
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f"{soft} < {minimum_required}"
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)
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return test_func(self)
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wrapper.__name__ = test_func.__name__
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wrapper.__doc__ = test_func.__doc__
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return wrapper
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return decorator
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class ResourceTest(unittest.TestCase):
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def setUp(self):
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self.limits = []
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for name in dir(resource):
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if name.startswith('RLIMIT_'):
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self.limits.append(getattr(resource, name))
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def test_args(self):
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self.assertRaises(TypeError, resource.getrlimit)
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self.assertRaises(TypeError, resource.getrlimit, 0, 42)
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self.assertRaises(OverflowError, resource.getrlimit, 2**1000)
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self.assertRaises(OverflowError, resource.getrlimit, -2**1000)
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self.assertRaises(TypeError, resource.getrlimit, '0')
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self.assertRaises(TypeError, resource.getrlimit, 42, 42)
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self.assertRaises(TypeError, resource.setrlimit)
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self.assertRaises(TypeError, resource.setrlimit, 0)
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self.assertRaises(TypeError, resource.setrlimit, 0, 42)
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self.assertRaises(TypeError, resource.setrlimit, 0, 42, 42)
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self.assertRaises(OverflowError, resource.setrlimit, 2**1000, (42, 42))
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self.assertRaises(OverflowError, resource.setrlimit, -2**1000, (42, 42))
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self.assertRaises(ValueError, resource.setrlimit, 0, (42,))
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self.assertRaises(ValueError, resource.setrlimit, 0, (42, 42, 42))
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self.assertRaises(TypeError, resource.setrlimit, '0', (42, 42))
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self.assertRaises(TypeError, resource.setrlimit, 0, ('42', 42))
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self.assertRaises(TypeError, resource.setrlimit, 0, (42, '42'))
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self.assertRaises(TypeError, resource.setrlimit, 42, 42, 42)
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@unittest.skipIf(sys.platform == "vxworks",
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"setting RLIMIT_FSIZE is not supported on VxWorks")
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@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
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def test_fsize_ismax(self):
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(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
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# RLIMIT_FSIZE should be RLIM_INFINITY, which will be a really big
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# number on a platform with large file support. On these platforms,
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# we need to test that the get/setrlimit functions properly convert
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# the number to a C long long and that the conversion doesn't raise
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# an error.
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self.assertGreater(resource.RLIM_INFINITY, 0)
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self.assertEqual(resource.RLIM_INFINITY, max)
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self.assertLessEqual(cur, max)
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resource.setrlimit(resource.RLIMIT_FSIZE, (max, max))
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resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
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@unittest.skipIf(sys.platform == "vxworks",
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"setting RLIMIT_FSIZE is not supported on VxWorks")
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@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
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def test_fsize_enforced(self):
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(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
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# Check to see what happens when the RLIMIT_FSIZE is small. Some
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# versions of Python were terminated by an uncaught SIGXFSZ, but
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# pythonrun.c has been fixed to ignore that exception. If so, the
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# write() should return EFBIG when the limit is exceeded.
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# At least one platform has an unlimited RLIMIT_FSIZE and attempts
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# to change it raise ValueError instead.
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try:
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def test_getrlimit(self):
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for res in self.limits:
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (1024, max))
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limit_set = True
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except ValueError:
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limit_set = False
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f = open(os_helper.TESTFN, "wb")
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limit = resource.getrlimit(res)
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self.assertIsInstance(limit, tuple)
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self.assertEqual(len(limit), 2)
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self.assertIsInstance(limit[0], int)
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self.assertIsInstance(limit[1], int)
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self.assertGreaterEqual(limit[0], 0)
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self.assertGreaterEqual(limit[1], 0)
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if limit[1] != resource.RLIM_INFINITY:
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self.assertLessEqual(limit[0], limit[1])
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except (ValueError, OSError) as e:
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if "not supported" in str(e).lower():
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continue
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raise
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def test_setrlimit(self):
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for res in self.limits:
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try:
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f.write(b"X" * 1024)
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limit = resource.getrlimit(res)
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except (ValueError, OSError):
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continue
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with ResourceLimitHelper(res) as helper:
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try:
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f.write(b"Y")
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f.flush()
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# On some systems (e.g., Ubuntu on hppa) the flush()
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# doesn't always cause the exception, but the close()
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# does eventually. Try flushing several times in
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# an attempt to ensure the file is really synced and
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# the exception raised.
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for i in range(5):
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time.sleep(.1)
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f.flush()
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except OSError:
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if not limit_set:
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raise
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if limit_set:
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# Close will attempt to flush the byte we wrote
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# Restore limit first to avoid getting a spurious error
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resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
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finally:
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f.close()
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finally:
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if limit_set:
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resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
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os_helper.unlink(os_helper.TESTFN)
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resource.setrlimit(res, limit)
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if limit[0] == limit[1] == resource.RLIM_INFINITY:
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continue
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if limit[1] != resource.RLIM_INFINITY and limit[1] > 0:
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# Try to set soft limit above hard limit (should fail)
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try:
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resource.setrlimit(res, (limit[1] + 1, limit[1]))
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# If it doesn't raise an error, that's a problem
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self.fail(f"Expected error when setting soft > hard for {res}")
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except (ValueError, OSError, PermissionError):
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# Expected - this should fail
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pass
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if limit[0] < limit[1] and limit[0] != resource.RLIM_INFINITY:
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new_soft = min(limit[0] + 1, limit[1])
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if helper.can_set_limit(new_soft, limit[1]):
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resource.setrlimit(res, (new_soft, limit[1]))
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resource.setrlimit(res, limit)
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except PermissionError:
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pass
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except (ValueError, OSError) as e:
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if any(msg in str(e).lower() for msg in
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["not support", "invalid argument", "operation not permitted"]):
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continue
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raise
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@unittest.skipIf(sys.platform == "vxworks",
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"setting RLIMIT_FSIZE is not supported on VxWorks")
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@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
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def test_fsize_too_big(self):
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# Be sure that setrlimit is checking for really large values
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too_big = 10**50
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(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (too_big, max))
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except (OverflowError, ValueError):
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pass
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (max, too_big))
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except (OverflowError, ValueError):
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pass
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@unittest.skipIf(sys.platform == "vxworks",
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"setting RLIMIT_FSIZE is not supported on VxWorks")
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@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
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def test_fsize_not_too_big(self):
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(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
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self.addCleanup(resource.setrlimit, resource.RLIMIT_FSIZE, (cur, max))
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def expected(cur):
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# The glibc wrapper functions use a 64-bit rlim_t data type,
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# even on 32-bit platforms. If a program tried to set a resource
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# limit to a value larger than can be represented in a 32-bit
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# unsigned long, then the glibc setrlimit() wrapper function
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# silently converted the limit value to RLIM_INFINITY.
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if sys.maxsize < 2**32 <= cur <= resource.RLIM_INFINITY:
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return [(resource.RLIM_INFINITY, max), (cur, max)]
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return [(min(cur, resource.RLIM_INFINITY), max)]
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resource.setrlimit(resource.RLIMIT_FSIZE, (2**31-5, max))
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self.assertEqual(resource.getrlimit(resource.RLIMIT_FSIZE), (2**31-5, max))
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resource.setrlimit(resource.RLIMIT_FSIZE, (2**31, max))
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self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**31))
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resource.setrlimit(resource.RLIMIT_FSIZE, (2**32-5, max))
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self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**32-5))
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (2**32, max))
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except OverflowError:
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pass
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else:
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self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**32))
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resource.setrlimit(resource.RLIMIT_FSIZE, (2**63-5, max))
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self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**63-5))
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (2**63, max))
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except ValueError:
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# There is a hard limit on macOS.
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pass
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else:
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self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**63))
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resource.setrlimit(resource.RLIMIT_FSIZE, (2**64-5, max))
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self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**64-5))
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@unittest.skipIf(sys.platform == "vxworks",
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"setting RLIMIT_FSIZE is not supported on VxWorks")
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@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
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def test_fsize_negative(self):
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self.assertGreater(resource.RLIM_INFINITY, 0)
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(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
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for value in -5, -2**31, -2**32-5, -2**63, -2**64-5, -2**1000:
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with self.subTest(value=value):
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self.assertRaises(ValueError, resource.setrlimit, resource.RLIMIT_FSIZE, (value, max))
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self.assertRaises(ValueError, resource.setrlimit, resource.RLIMIT_FSIZE, (cur, value))
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if resource.RLIM_INFINITY in (2**32-3, 2**32-1, 2**64-3, 2**64-1):
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value = (resource.RLIM_INFINITY & 0xffff) - 0x10000
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with self.assertWarnsRegex(DeprecationWarning, "RLIM_INFINITY"):
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resource.setrlimit(resource.RLIMIT_FSIZE, (value, max))
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with self.assertWarnsRegex(DeprecationWarning, "RLIM_INFINITY"):
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resource.setrlimit(resource.RLIMIT_FSIZE, (cur, value))
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@unittest.skipUnless(hasattr(resource, "getrusage"), "needs getrusage")
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def test_getrusage(self):
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for who in [resource.RUSAGE_SELF]:
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usage = resource.getrusage(who)
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self.assertIsInstance(usage, tuple)
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self.assertEqual(len(usage), 16)
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for i, value in enumerate(usage):
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self.assertIsInstance(value, (int, float))
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if i not in [8, 9]:
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self.assertGreaterEqual(value, 0)
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if hasattr(resource, 'RUSAGE_CHILDREN'):
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usage = resource.getrusage(resource.RUSAGE_CHILDREN)
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self.assertIsInstance(usage, tuple)
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self.assertRaises(TypeError, resource.getrusage)
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self.assertRaises(TypeError, resource.getrusage, 42, 42)
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usageself = resource.getrusage(resource.RUSAGE_SELF)
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usagechildren = resource.getrusage(resource.RUSAGE_CHILDREN)
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# May not be available on all systems.
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try:
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usageboth = resource.getrusage(resource.RUSAGE_BOTH)
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except (ValueError, AttributeError):
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pass
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try:
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usage_thread = resource.getrusage(resource.RUSAGE_THREAD)
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except (ValueError, AttributeError):
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pass
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self.assertRaises(ValueError, resource.getrusage, -999999)
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self.assertRaises(ValueError, resource.getrusage, 1000000)
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# Issue 6083: Reference counting bug
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@unittest.skipIf(sys.platform == "vxworks",
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"setting RLIMIT_CPU is not supported on VxWorks")
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@unittest.skipUnless(hasattr(resource, 'RLIMIT_CPU'), 'requires resource.RLIMIT_CPU')
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def test_setrusage_refcount(self):
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limits = resource.getrlimit(resource.RLIMIT_CPU)
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class BadSequence:
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def __len__(self):
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return 2
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def __getitem__(self, key):
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if key in (0, 1):
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return len(tuple(range(1000000)))
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raise IndexError
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@skip_if_resource_limited(resource.RLIMIT_FSIZE, 1024 * 1024)
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def test_fsize_limit(self):
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"""Test file size limit enforcement - main fix for issue #37883."""
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with ResourceLimitHelper(resource.RLIMIT_FSIZE) as helper:
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test_size, can_test = helper.get_safe_test_limit(
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desired_size=1024 * 1024,
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minimum_size=10 * 1024
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)
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if not can_test:
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self.skipTest(
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f"File size limit too restrictive for testing "
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f"(current limit: {helper.original_limits[0]} bytes)"
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)
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with tempfile.NamedTemporaryFile(mode='wb', delete=True) as f:
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limit_size = test_size // 2
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if not helper.can_set_limit(limit_size, helper.original_limits[1]):
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self.skipTest(
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f"Cannot set file size limit to {limit_size} bytes"
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)
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE,
|
||||
(limit_size, helper.original_limits[1]))
|
||||
except (ValueError, OSError, PermissionError) as e:
|
||||
self.skipTest(f"Cannot modify file size limit: {e}")
|
||||
|
||||
chunk_size = min(8192, limit_size // 4)
|
||||
bytes_written = 0
|
||||
target_size = limit_size - chunk_size
|
||||
|
||||
while bytes_written < target_size:
|
||||
chunk = b'x' * min(chunk_size, target_size - bytes_written)
|
||||
f.write(chunk)
|
||||
bytes_written += len(chunk)
|
||||
f.flush()
|
||||
|
||||
with self.assertRaises(OSError) as cm:
|
||||
excess_data = b'y' * (limit_size)
|
||||
f.write(excess_data)
|
||||
f.flush()
|
||||
|
||||
self.assertIn(cm.exception.errno,
|
||||
[errno.EFBIG, errno.ENOSPC, errno.E2BIG],
|
||||
f"Unexpected error: {cm.exception}")
|
||||
|
||||
resource.setrlimit(resource.RLIMIT_CPU, BadSequence())
|
||||
@skip_if_resource_limited(resource.RLIMIT_FSIZE, 10 * 1024 * 1024)
|
||||
def test_large_file_operations(self):
|
||||
"""Test operations with larger files when limits permit."""
|
||||
with ResourceLimitHelper(resource.RLIMIT_FSIZE) as helper:
|
||||
test_size, can_test = helper.get_safe_test_limit(
|
||||
desired_size=10 * 1024 * 1024,
|
||||
minimum_size=1024 * 1024
|
||||
)
|
||||
|
||||
if not can_test:
|
||||
self.skipTest("File size limit too restrictive for large file test")
|
||||
|
||||
with tempfile.NamedTemporaryFile(delete=True) as f:
|
||||
chunk = b'x' * 8192
|
||||
chunks_to_write = test_size // len(chunk)
|
||||
|
||||
for i in range(chunks_to_write):
|
||||
f.write(chunk)
|
||||
if i % 100 == 0:
|
||||
f.flush()
|
||||
|
||||
f.flush()
|
||||
file_size = f.tell()
|
||||
|
||||
self.assertGreater(file_size, 0)
|
||||
self.assertLessEqual(file_size, test_size)
|
||||
|
||||
f.seek(0)
|
||||
total_read = 0
|
||||
while True:
|
||||
data = f.read(8192)
|
||||
if not data:
|
||||
break
|
||||
total_read += len(data)
|
||||
|
||||
self.assertEqual(total_read, file_size)
|
||||
|
||||
def test_pagesize(self):
|
||||
pagesize = resource.getpagesize()
|
||||
self.assertIsInstance(pagesize, int)
|
||||
self.assertGreaterEqual(pagesize, 0)
|
||||
def test_cpu_time_limit(self):
|
||||
"""Test CPU time limit handling."""
|
||||
if not hasattr(resource, 'RLIMIT_CPU'):
|
||||
self.skipTest("RLIMIT_CPU not available on this platform")
|
||||
|
||||
with ResourceLimitHelper(resource.RLIMIT_CPU) as helper:
|
||||
soft, hard = helper.original_limits
|
||||
|
||||
if soft == resource.RLIM_INFINITY:
|
||||
test_limit = 3600
|
||||
if helper.can_set_limit(test_limit, hard):
|
||||
resource.setrlimit(resource.RLIMIT_CPU, (test_limit, hard))
|
||||
new_soft, new_hard = resource.getrlimit(resource.RLIMIT_CPU)
|
||||
self.assertEqual(new_soft, test_limit)
|
||||
elif soft > 10:
|
||||
test_limit = soft - 1
|
||||
if helper.can_set_limit(test_limit, hard):
|
||||
resource.setrlimit(resource.RLIMIT_CPU, (test_limit, hard))
|
||||
new_soft, new_hard = resource.getrlimit(resource.RLIMIT_CPU)
|
||||
self.assertEqual(new_soft, test_limit)
|
||||
|
||||
def test_contants(self):
|
||||
self.assertIsInstance(resource.RLIM_INFINITY, int)
|
||||
if sys.platform.startswith(('freebsd', 'solaris', 'sunos', 'aix')):
|
||||
self.assertHasAttr(resource, 'RLIM_SAVED_CUR')
|
||||
self.assertHasAttr(resource, 'RLIM_SAVED_MAX')
|
||||
if hasattr(resource, 'RLIM_SAVED_CUR'):
|
||||
self.assertIsInstance(resource.RLIM_SAVED_CUR, int)
|
||||
self.assertIsInstance(resource.RLIM_SAVED_MAX, int)
|
||||
def test_integer_overflow(self):
|
||||
"""Test handling of large values to prevent integer overflow."""
|
||||
for res in self.limits:
|
||||
try:
|
||||
soft, hard = resource.getrlimit(res)
|
||||
except (ValueError, OSError):
|
||||
continue
|
||||
|
||||
if hard != resource.RLIM_INFINITY:
|
||||
with ResourceLimitHelper(res):
|
||||
try:
|
||||
resource.setrlimit(res, (hard, hard))
|
||||
|
||||
if hard < sys.maxsize:
|
||||
with self.assertRaises((ValueError, OSError)):
|
||||
resource.setrlimit(res, (hard + 1, hard))
|
||||
except PermissionError:
|
||||
pass
|
||||
except (ValueError, OSError) as e:
|
||||
if "not support" not in str(e).lower():
|
||||
raise
|
||||
|
||||
@unittest.skipUnless(sys.platform in ('linux', 'android'), 'Linux only')
|
||||
def test_linux_constants(self):
|
||||
for attr in ['MSGQUEUE', 'NICE', 'RTPRIO', 'RTTIME', 'SIGPENDING']:
|
||||
with contextlib.suppress(AttributeError):
|
||||
self.assertIsInstance(getattr(resource, 'RLIMIT_' + attr), int)
|
||||
|
||||
def test_freebsd_contants(self):
|
||||
for attr in ['SWAP', 'SBSIZE', 'NPTS', 'UMTXP', 'VMEM', 'PIPEBUF']:
|
||||
with contextlib.suppress(AttributeError):
|
||||
self.assertIsInstance(getattr(resource, 'RLIMIT_' + attr), int)
|
||||
|
||||
@unittest.skipUnless(hasattr(resource, 'prlimit'), 'no prlimit')
|
||||
@support.requires_linux_version(2, 6, 36)
|
||||
@unittest.skipUnless(hasattr(resource, 'prlimit'), 'prlimit() not available')
|
||||
def test_prlimit(self):
|
||||
self.assertRaises(TypeError, resource.prlimit)
|
||||
self.assertRaises(ProcessLookupError, resource.prlimit,
|
||||
-1, resource.RLIMIT_AS)
|
||||
limit = resource.getrlimit(resource.RLIMIT_AS)
|
||||
self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS), limit)
|
||||
self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS, limit),
|
||||
limit)
|
||||
|
||||
# Issue 20191: Reference counting bug
|
||||
@unittest.skipUnless(hasattr(resource, 'prlimit'), 'no prlimit')
|
||||
@support.requires_linux_version(2, 6, 36)
|
||||
def test_prlimit_refcount(self):
|
||||
class BadSeq:
|
||||
def __len__(self):
|
||||
return 2
|
||||
def __getitem__(self, key):
|
||||
lim = limits[key]
|
||||
return lim - 1 if lim > 0 else lim + sys.maxsize*2 # new reference
|
||||
|
||||
"""Test the prlimit function for getting/setting process limits."""
|
||||
limits = resource.getrlimit(resource.RLIMIT_AS)
|
||||
self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS, BadSeq()),
|
||||
limits)
|
||||
plimits = resource.prlimit(0, resource.RLIMIT_AS)
|
||||
self.assertEqual(plimits, limits)
|
||||
|
||||
result = resource.prlimit(0, resource.RLIMIT_AS, limits)
|
||||
self.assertEqual(result, limits)
|
||||
|
||||
for res in self.limits:
|
||||
try:
|
||||
limits = resource.getrlimit(res)
|
||||
plimits = resource.prlimit(0, res)
|
||||
self.assertEqual(plimits, limits)
|
||||
except (ValueError, OSError):
|
||||
pass
|
||||
|
||||
@support.requires_resource('cpu')
|
||||
def test_cpu_consumption(self):
|
||||
"""Test measuring CPU consumption through rusage."""
|
||||
usage_start = resource.getrusage(resource.RUSAGE_SELF)
|
||||
|
||||
count = 0
|
||||
for i in range(1000000):
|
||||
count += i
|
||||
|
||||
usage_end = resource.getrusage(resource.RUSAGE_SELF)
|
||||
|
||||
cpu_start = usage_start.ru_utime + usage_start.ru_stime
|
||||
cpu_end = usage_end.ru_utime + usage_end.ru_stime
|
||||
|
||||
if cpu_end > cpu_start:
|
||||
self.assertGreater(cpu_end, cpu_start)
|
||||
|
||||
def test_resource_constants(self):
|
||||
"""Test that resource constants are properly defined."""
|
||||
self.assertTrue(hasattr(resource, 'RLIM_INFINITY'))
|
||||
self.assertTrue(hasattr(resource, 'RUSAGE_SELF'))
|
||||
|
||||
self.assertGreater(resource.RLIM_INFINITY, sys.maxsize // 2)
|
||||
|
||||
rlimit_names = [name for name in dir(resource) if name.startswith('RLIMIT_')]
|
||||
self.assertGreater(len(rlimit_names), 0, "No RLIMIT constants found")
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
unittest.main()
|
||||
unittest.main()
|
||||
Loading…
Add table
Add a link
Reference in a new issue