261 lines
9.4 KiB
Python
Executable File
261 lines
9.4 KiB
Python
Executable File
"""
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merged implementation of the cache provider
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the name cache was not chosen to ensure pluggy automatically
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ignores the external pytest-cache
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"""
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from __future__ import absolute_import, division, print_function
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import py
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import pytest
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import json
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import os
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from os.path import sep as _sep, altsep as _altsep
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class Cache(object):
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def __init__(self, config):
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self.config = config
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self._cachedir = Cache.cache_dir_from_config(config)
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self.trace = config.trace.root.get("cache")
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if config.getvalue("cacheclear"):
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self.trace("clearing cachedir")
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if self._cachedir.check():
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self._cachedir.remove()
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self._cachedir.mkdir()
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@staticmethod
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def cache_dir_from_config(config):
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cache_dir = config.getini("cache_dir")
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cache_dir = os.path.expanduser(cache_dir)
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cache_dir = os.path.expandvars(cache_dir)
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if os.path.isabs(cache_dir):
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return py.path.local(cache_dir)
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else:
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return config.rootdir.join(cache_dir)
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def makedir(self, name):
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""" return a directory path object with the given name. If the
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directory does not yet exist, it will be created. You can use it
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to manage files likes e. g. store/retrieve database
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dumps across test sessions.
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:param name: must be a string not containing a ``/`` separator.
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Make sure the name contains your plugin or application
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identifiers to prevent clashes with other cache users.
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"""
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if _sep in name or _altsep is not None and _altsep in name:
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raise ValueError("name is not allowed to contain path separators")
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return self._cachedir.ensure_dir("d", name)
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def _getvaluepath(self, key):
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return self._cachedir.join('v', *key.split('/'))
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def get(self, key, default):
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""" return cached value for the given key. If no value
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was yet cached or the value cannot be read, the specified
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default is returned.
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:param key: must be a ``/`` separated value. Usually the first
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name is the name of your plugin or your application.
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:param default: must be provided in case of a cache-miss or
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invalid cache values.
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"""
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path = self._getvaluepath(key)
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if path.check():
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try:
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with path.open("r") as f:
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return json.load(f)
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except ValueError:
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self.trace("cache-invalid at %s" % (path,))
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return default
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def set(self, key, value):
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""" save value for the given key.
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:param key: must be a ``/`` separated value. Usually the first
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name is the name of your plugin or your application.
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:param value: must be of any combination of basic
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python types, including nested types
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like e. g. lists of dictionaries.
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"""
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path = self._getvaluepath(key)
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try:
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path.dirpath().ensure_dir()
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except (py.error.EEXIST, py.error.EACCES):
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self.config.warn(
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code='I9', message='could not create cache path %s' % (path,)
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)
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return
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try:
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f = path.open('w')
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except py.error.ENOTDIR:
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self.config.warn(
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code='I9', message='cache could not write path %s' % (path,))
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else:
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with f:
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self.trace("cache-write %s: %r" % (key, value,))
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json.dump(value, f, indent=2, sort_keys=True)
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class LFPlugin:
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""" Plugin which implements the --lf (run last-failing) option """
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def __init__(self, config):
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self.config = config
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active_keys = 'lf', 'failedfirst'
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self.active = any(config.getvalue(key) for key in active_keys)
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self.lastfailed = config.cache.get("cache/lastfailed", {})
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self._previously_failed_count = None
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def pytest_report_collectionfinish(self):
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if self.active:
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if not self._previously_failed_count:
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mode = "run all (no recorded failures)"
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else:
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noun = 'failure' if self._previously_failed_count == 1 else 'failures'
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suffix = " first" if self.config.getvalue("failedfirst") else ""
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mode = "rerun previous {count} {noun}{suffix}".format(
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count=self._previously_failed_count, suffix=suffix, noun=noun
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)
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return "run-last-failure: %s" % mode
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def pytest_runtest_logreport(self, report):
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if (report.when == 'call' and report.passed) or report.skipped:
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self.lastfailed.pop(report.nodeid, None)
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elif report.failed:
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self.lastfailed[report.nodeid] = True
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def pytest_collectreport(self, report):
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passed = report.outcome in ('passed', 'skipped')
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if passed:
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if report.nodeid in self.lastfailed:
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self.lastfailed.pop(report.nodeid)
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self.lastfailed.update(
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(item.nodeid, True)
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for item in report.result)
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else:
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self.lastfailed[report.nodeid] = True
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def pytest_collection_modifyitems(self, session, config, items):
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if self.active and self.lastfailed:
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previously_failed = []
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previously_passed = []
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for item in items:
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if item.nodeid in self.lastfailed:
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previously_failed.append(item)
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else:
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previously_passed.append(item)
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self._previously_failed_count = len(previously_failed)
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if not previously_failed:
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# running a subset of all tests with recorded failures outside
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# of the set of tests currently executing
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return
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if self.config.getvalue("lf"):
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items[:] = previously_failed
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config.hook.pytest_deselected(items=previously_passed)
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else:
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items[:] = previously_failed + previously_passed
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def pytest_sessionfinish(self, session):
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config = self.config
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if config.getvalue("cacheshow") or hasattr(config, "slaveinput"):
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return
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saved_lastfailed = config.cache.get("cache/lastfailed", {})
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if saved_lastfailed != self.lastfailed:
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config.cache.set("cache/lastfailed", self.lastfailed)
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def pytest_addoption(parser):
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group = parser.getgroup("general")
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group.addoption(
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'--lf', '--last-failed', action='store_true', dest="lf",
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help="rerun only the tests that failed "
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"at the last run (or all if none failed)")
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group.addoption(
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'--ff', '--failed-first', action='store_true', dest="failedfirst",
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help="run all tests but run the last failures first. "
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"This may re-order tests and thus lead to "
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"repeated fixture setup/teardown")
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group.addoption(
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'--cache-show', action='store_true', dest="cacheshow",
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help="show cache contents, don't perform collection or tests")
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group.addoption(
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'--cache-clear', action='store_true', dest="cacheclear",
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help="remove all cache contents at start of test run.")
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parser.addini(
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"cache_dir", default='.cache',
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help="cache directory path.")
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def pytest_cmdline_main(config):
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if config.option.cacheshow:
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from _pytest.main import wrap_session
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return wrap_session(config, cacheshow)
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@pytest.hookimpl(tryfirst=True)
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def pytest_configure(config):
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config.cache = Cache(config)
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config.pluginmanager.register(LFPlugin(config), "lfplugin")
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@pytest.fixture
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def cache(request):
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"""
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Return a cache object that can persist state between testing sessions.
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cache.get(key, default)
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cache.set(key, value)
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Keys must be a ``/`` separated value, where the first part is usually the
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name of your plugin or application to avoid clashes with other cache users.
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Values can be any object handled by the json stdlib module.
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"""
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return request.config.cache
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def pytest_report_header(config):
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if config.option.verbose:
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relpath = py.path.local().bestrelpath(config.cache._cachedir)
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return "cachedir: %s" % relpath
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def cacheshow(config, session):
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from pprint import pprint
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tw = py.io.TerminalWriter()
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tw.line("cachedir: " + str(config.cache._cachedir))
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if not config.cache._cachedir.check():
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tw.line("cache is empty")
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return 0
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dummy = object()
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basedir = config.cache._cachedir
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vdir = basedir.join("v")
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tw.sep("-", "cache values")
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for valpath in sorted(vdir.visit(lambda x: x.isfile())):
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key = valpath.relto(vdir).replace(valpath.sep, "/")
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val = config.cache.get(key, dummy)
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if val is dummy:
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tw.line("%s contains unreadable content, "
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"will be ignored" % key)
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else:
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tw.line("%s contains:" % key)
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stream = py.io.TextIO()
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pprint(val, stream=stream)
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for line in stream.getvalue().splitlines():
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tw.line(" " + line)
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ddir = basedir.join("d")
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if ddir.isdir() and ddir.listdir():
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tw.sep("-", "cache directories")
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for p in sorted(basedir.join("d").visit()):
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# if p.check(dir=1):
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# print("%s/" % p.relto(basedir))
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if p.isfile():
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key = p.relto(basedir)
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tw.line("%s is a file of length %d" % (
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key, p.size()))
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return 0
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