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b9b4307e4d
``` PytestDeprecationWarning: The hookimpl pytest_pyfunc_call uses old-style configuration options (marks or attributes). Please use the pytest.hookimpl(hookwrapper=True) decorator instead to configure the hooks. See https://docs.pytest.org/en/latest/deprecations.html#configuring-hook-specs-impls-using-markers @pytest.mark.hookwrapper ```
98 lines
3.0 KiB
Python
98 lines
3.0 KiB
Python
#!/usr/bin/env python3
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import sys
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import pytest
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import time
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import re
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import os
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import threading
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# If a test fails, wait a moment before retrieving the captured
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# stdout/stderr. When using a server process, this makes sure that we capture
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# any potential output of the server that comes *after* a test has failed. For
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# example, if a request handler raises an exception, the server first signals an
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# error to FUSE (causing the test to fail), and then logs the exception. Without
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# the extra delay, the exception will go into nowhere.
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@pytest.hookimpl(hookwrapper=True)
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def pytest_pyfunc_call(pyfuncitem):
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outcome = yield
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failed = outcome.excinfo is not None
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if failed:
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time.sleep(1)
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class OutputChecker:
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'''Check output data for suspicious patterns.
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Everything written to check_output.fd will be scanned for suspicious
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messages and then written to sys.stdout.
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'''
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def __init__(self):
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(fd_r, fd_w) = os.pipe()
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self.fd = fd_w
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self._false_positives = []
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self._buf = bytearray()
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self._thread = threading.Thread(target=self._loop, daemon=True, args=(fd_r,))
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self._thread.start()
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def register_output(self, pattern, count=1, flags=re.MULTILINE):
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'''Register *pattern* as false positive for output checking
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This prevents the test from failing because the output otherwise
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appears suspicious.
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'''
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self._false_positives.append((pattern, flags, count))
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def _loop(self, ifd):
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BUFSIZE = 128*1024
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ofd = sys.stdout.fileno()
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while True:
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buf = os.read(ifd, BUFSIZE)
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if not buf:
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break
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os.write(ofd, buf)
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self._buf += buf
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def _check(self):
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os.close(self.fd)
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self._thread.join()
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buf = self._buf.decode('utf8', errors='replace')
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# Strip out false positives
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for (pattern, flags, count) in self._false_positives:
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cp = re.compile(pattern, flags)
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(buf, cnt) = cp.subn('', buf, count=count)
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patterns = [ r'\b{}\b'.format(x) for x in
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('exception', 'error', 'warning', 'fatal', 'traceback',
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'fault', 'crash(?:ed)?', 'abort(?:ed)',
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'uninitiali[zs]ed') ]
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patterns += ['^==[0-9]+== ']
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for pattern in patterns:
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cp = re.compile(pattern, re.IGNORECASE | re.MULTILINE)
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hit = cp.search(buf)
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if hit:
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raise AssertionError('Suspicious output to stderr (matched "%s")'
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% hit.group(0))
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@pytest.fixture()
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def output_checker(request):
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checker = OutputChecker()
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yield checker
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checker._check()
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# Make test outcome available to fixtures
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# (from https://github.com/pytest-dev/pytest/issues/230)
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@pytest.hookimpl(hookwrapper=True, tryfirst=True)
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def pytest_runtest_makereport(item, call):
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outcome = yield
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rep = outcome.get_result()
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setattr(item, "rep_" + rep.when, rep)
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return rep
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