478 lines
16 KiB
Python
478 lines
16 KiB
Python
"""
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pytest PluginManager, basic initialization and tracing.
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(c) Holger Krekel 2004-2010
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"""
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import sys, os
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import inspect
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import py
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from _pytest import hookspec # the extension point definitions
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assert py.__version__.split(".")[:2] >= ['1', '4'], ("installation problem: "
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"%s is too old, remove or upgrade 'py'" % (py.__version__))
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default_plugins = (
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"config mark main terminal runner python pdb unittest capture skipping "
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"tmpdir monkeypatch recwarn pastebin helpconfig nose assertion genscript "
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"junitxml resultlog doctest").split()
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class TagTracer:
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def __init__(self):
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self._tag2proc = {}
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self.writer = None
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self.indent = 0
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def get(self, name):
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return TagTracerSub(self, (name,))
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def processmessage(self, tags, args):
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if self.writer is not None:
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if args:
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indent = " " * self.indent
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content = " ".join(map(str, args))
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self.writer("%s%s [%s]\n" %(indent, content, ":".join(tags)))
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try:
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self._tag2proc[tags](tags, args)
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except KeyError:
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pass
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def setwriter(self, writer):
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self.writer = writer
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def setprocessor(self, tags, processor):
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if isinstance(tags, str):
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tags = tuple(tags.split(":"))
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else:
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assert isinstance(tags, tuple)
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self._tag2proc[tags] = processor
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class TagTracerSub:
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def __init__(self, root, tags):
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self.root = root
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self.tags = tags
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def __call__(self, *args):
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self.root.processmessage(self.tags, args)
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def setmyprocessor(self, processor):
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self.root.setprocessor(self.tags, processor)
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def get(self, name):
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return self.__class__(self.root, self.tags + (name,))
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class PluginManager(object):
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def __init__(self, load=False):
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self._name2plugin = {}
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self._listattrcache = {}
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self._plugins = []
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self._hints = []
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self.trace = TagTracer().get("pluginmanage")
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self._plugin_distinfo = []
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if os.environ.get('PYTEST_DEBUG'):
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err = sys.stderr
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encoding = getattr(err, 'encoding', 'utf8')
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try:
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err = py.io.dupfile(err, encoding=encoding)
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except Exception:
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pass
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self.trace.root.setwriter(err.write)
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self.hook = HookRelay([hookspec], pm=self)
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self.register(self)
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if load:
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for spec in default_plugins:
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self.import_plugin(spec)
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def register(self, plugin, name=None, prepend=False):
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assert not self.isregistered(plugin), plugin
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name = name or getattr(plugin, '__name__', str(id(plugin)))
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if name in self._name2plugin:
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return False
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#self.trace("registering", name, plugin)
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self._name2plugin[name] = plugin
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self.call_plugin(plugin, "pytest_addhooks", {'pluginmanager': self})
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self.hook.pytest_plugin_registered(manager=self, plugin=plugin)
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if not prepend:
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self._plugins.append(plugin)
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else:
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self._plugins.insert(0, plugin)
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return True
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def unregister(self, plugin=None, name=None):
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if plugin is None:
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plugin = self.getplugin(name=name)
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self._plugins.remove(plugin)
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self.hook.pytest_plugin_unregistered(plugin=plugin)
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for name, value in list(self._name2plugin.items()):
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if value == plugin:
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del self._name2plugin[name]
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def isregistered(self, plugin, name=None):
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if self.getplugin(name) is not None:
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return True
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for val in self._name2plugin.values():
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if plugin == val:
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return True
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def addhooks(self, spec):
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self.hook._addhooks(spec, prefix="pytest_")
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def getplugins(self):
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return list(self._plugins)
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def skipifmissing(self, name):
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if not self.hasplugin(name):
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py.test.skip("plugin %r is missing" % name)
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def hasplugin(self, name):
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return bool(self.getplugin(name))
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def getplugin(self, name):
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if name is None:
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return None
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try:
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return self._name2plugin[name]
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except KeyError:
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return self._name2plugin.get("_pytest." + name, None)
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# API for bootstrapping
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#
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def _envlist(self, varname):
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val = py.std.os.environ.get(varname, None)
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if val is not None:
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return val.split(',')
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return ()
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def consider_env(self):
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for spec in self._envlist("PYTEST_PLUGINS"):
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self.import_plugin(spec)
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def consider_setuptools_entrypoints(self):
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try:
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from pkg_resources import iter_entry_points, DistributionNotFound
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except ImportError:
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return # XXX issue a warning
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for ep in iter_entry_points('pytest11'):
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name = ep.name
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if name.startswith("pytest_"):
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name = name[7:]
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if ep.name in self._name2plugin or name in self._name2plugin:
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continue
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try:
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plugin = ep.load()
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except DistributionNotFound:
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continue
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self._plugin_distinfo.append((ep.dist, plugin))
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self.register(plugin, name=name)
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def consider_preparse(self, args):
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for opt1,opt2 in zip(args, args[1:]):
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if opt1 == "-p":
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self.consider_pluginarg(opt2)
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def consider_pluginarg(self, arg):
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if arg.startswith("no:"):
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name = arg[3:]
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if self.getplugin(name) is not None:
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self.unregister(None, name=name)
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self._name2plugin[name] = -1
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else:
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if self.getplugin(arg) is None:
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self.import_plugin(arg)
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def consider_conftest(self, conftestmodule):
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if self.register(conftestmodule, name=conftestmodule.__file__):
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self.consider_module(conftestmodule)
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def consider_module(self, mod):
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attr = getattr(mod, "pytest_plugins", ())
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if attr:
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if not isinstance(attr, (list, tuple)):
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attr = (attr,)
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for spec in attr:
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self.import_plugin(spec)
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def import_plugin(self, modname):
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assert isinstance(modname, str)
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if self.getplugin(modname) is not None:
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return
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try:
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#self.trace("importing", modname)
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mod = importplugin(modname)
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except KeyboardInterrupt:
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raise
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except ImportError:
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if modname.startswith("pytest_"):
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return self.import_plugin(modname[7:])
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raise
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except:
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e = py.std.sys.exc_info()[1]
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if not hasattr(py.test, 'skip'):
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raise
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elif not isinstance(e, py.test.skip.Exception):
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raise
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self._hints.append("skipped plugin %r: %s" %((modname, e.msg)))
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else:
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self.register(mod, modname)
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self.consider_module(mod)
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def pytest_configure(self, config):
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config.addinivalue_line("markers",
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"tryfirst: mark a hook implementation function such that the "
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"plugin machinery will try to call it first/as early as possible.")
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config.addinivalue_line("markers",
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"trylast: mark a hook implementation function such that the "
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"plugin machinery will try to call it last/as late as possible.")
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def pytest_plugin_registered(self, plugin):
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import pytest
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dic = self.call_plugin(plugin, "pytest_namespace", {}) or {}
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if dic:
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self._setns(pytest, dic)
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if hasattr(self, '_config'):
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self.call_plugin(plugin, "pytest_addoption",
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{'parser': self._config._parser})
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self.call_plugin(plugin, "pytest_configure",
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{'config': self._config})
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def _setns(self, obj, dic):
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import pytest
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for name, value in dic.items():
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if isinstance(value, dict):
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mod = getattr(obj, name, None)
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if mod is None:
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modname = "pytest.%s" % name
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mod = py.std.types.ModuleType(modname)
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sys.modules[modname] = mod
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mod.__all__ = []
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setattr(obj, name, mod)
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obj.__all__.append(name)
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self._setns(mod, value)
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else:
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setattr(obj, name, value)
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obj.__all__.append(name)
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#if obj != pytest:
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# pytest.__all__.append(name)
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setattr(pytest, name, value)
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def pytest_terminal_summary(self, terminalreporter):
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tw = terminalreporter._tw
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if terminalreporter.config.option.traceconfig:
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for hint in self._hints:
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tw.line("hint: %s" % hint)
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def do_addoption(self, parser):
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mname = "pytest_addoption"
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methods = reversed(self.listattr(mname))
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MultiCall(methods, {'parser': parser}).execute()
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def do_configure(self, config):
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assert not hasattr(self, '_config')
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self._config = config
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config.hook.pytest_configure(config=self._config)
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def do_unconfigure(self, config):
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config = self._config
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del self._config
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config.hook.pytest_unconfigure(config=config)
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config.pluginmanager.unregister(self)
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def notify_exception(self, excinfo, option=None):
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if option and option.fulltrace:
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style = "long"
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else:
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style = "native"
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excrepr = excinfo.getrepr(funcargs=True,
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showlocals=getattr(option, 'showlocals', False),
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style=style,
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)
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res = self.hook.pytest_internalerror(excrepr=excrepr)
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if not py.builtin.any(res):
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for line in str(excrepr).split("\n"):
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sys.stderr.write("INTERNALERROR> %s\n" %line)
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sys.stderr.flush()
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def listattr(self, attrname, plugins=None):
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if plugins is None:
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plugins = self._plugins
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key = (attrname,) + tuple(plugins)
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try:
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return list(self._listattrcache[key])
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except KeyError:
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pass
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l = []
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last = []
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for plugin in plugins:
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try:
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meth = getattr(plugin, attrname)
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if hasattr(meth, 'tryfirst'):
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last.append(meth)
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elif hasattr(meth, 'trylast'):
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l.insert(0, meth)
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else:
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l.append(meth)
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except AttributeError:
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continue
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l.extend(last)
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self._listattrcache[key] = list(l)
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return l
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def call_plugin(self, plugin, methname, kwargs):
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return MultiCall(methods=self.listattr(methname, plugins=[plugin]),
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kwargs=kwargs, firstresult=True).execute()
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def importplugin(importspec):
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name = importspec
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try:
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mod = "_pytest." + name
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return __import__(mod, None, None, '__doc__')
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except ImportError:
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#e = py.std.sys.exc_info()[1]
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#if str(e).find(name) == -1:
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# raise
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pass #
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return __import__(importspec, None, None, '__doc__')
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class MultiCall:
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""" execute a call into multiple python functions/methods. """
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def __init__(self, methods, kwargs, firstresult=False):
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self.methods = list(methods)
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self.kwargs = kwargs
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self.results = []
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self.firstresult = firstresult
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def __repr__(self):
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status = "%d results, %d meths" % (len(self.results), len(self.methods))
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return "<MultiCall %s, kwargs=%r>" %(status, self.kwargs)
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def execute(self):
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while self.methods:
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method = self.methods.pop()
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kwargs = self.getkwargs(method)
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res = method(**kwargs)
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if res is not None:
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self.results.append(res)
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if self.firstresult:
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return res
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if not self.firstresult:
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return self.results
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def getkwargs(self, method):
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kwargs = {}
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for argname in varnames(method):
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try:
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kwargs[argname] = self.kwargs[argname]
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except KeyError:
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if argname == "__multicall__":
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kwargs[argname] = self
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return kwargs
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def varnames(func):
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try:
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return func._varnames
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except AttributeError:
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pass
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if not inspect.isfunction(func) and not inspect.ismethod(func):
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func = getattr(func, '__call__', func)
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ismethod = inspect.ismethod(func)
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rawcode = py.code.getrawcode(func)
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try:
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x = rawcode.co_varnames[ismethod:rawcode.co_argcount]
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except AttributeError:
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x = ()
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py.builtin._getfuncdict(func)['_varnames'] = x
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return x
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class HookRelay:
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def __init__(self, hookspecs, pm, prefix="pytest_"):
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if not isinstance(hookspecs, list):
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hookspecs = [hookspecs]
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self._hookspecs = []
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self._pm = pm
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self.trace = pm.trace.root.get("hook")
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for hookspec in hookspecs:
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self._addhooks(hookspec, prefix)
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def _addhooks(self, hookspecs, prefix):
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self._hookspecs.append(hookspecs)
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added = False
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for name, method in vars(hookspecs).items():
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if name.startswith(prefix):
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firstresult = getattr(method, 'firstresult', False)
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hc = HookCaller(self, name, firstresult=firstresult)
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setattr(self, name, hc)
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added = True
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#print ("setting new hook", name)
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if not added:
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raise ValueError("did not find new %r hooks in %r" %(
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prefix, hookspecs,))
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class HookCaller:
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def __init__(self, hookrelay, name, firstresult):
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self.hookrelay = hookrelay
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self.name = name
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self.firstresult = firstresult
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self.trace = self.hookrelay.trace
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def __repr__(self):
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return "<HookCaller %r>" %(self.name,)
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def __call__(self, **kwargs):
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methods = self.hookrelay._pm.listattr(self.name)
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return self._docall(methods, kwargs)
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def pcall(self, plugins, **kwargs):
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methods = self.hookrelay._pm.listattr(self.name, plugins=plugins)
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return self._docall(methods, kwargs)
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def _docall(self, methods, kwargs):
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self.trace(self.name, kwargs)
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self.trace.root.indent += 1
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mc = MultiCall(methods, kwargs, firstresult=self.firstresult)
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try:
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res = mc.execute()
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if res:
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self.trace("finish", self.name, "-->", res)
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finally:
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self.trace.root.indent -= 1
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return res
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_preinit = []
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def _preloadplugins():
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_preinit.append(PluginManager(load=True))
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def _prepareconfig(args=None, plugins=None):
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if args is None:
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args = sys.argv[1:]
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elif isinstance(args, py.path.local):
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args = [str(args)]
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elif not isinstance(args, (tuple, list)):
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if not isinstance(args, str):
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raise ValueError("not a string or argument list: %r" % (args,))
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args = py.std.shlex.split(args)
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if _preinit:
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_pluginmanager = _preinit.pop(0)
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else: # subsequent calls to main will create a fresh instance
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_pluginmanager = PluginManager(load=True)
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hook = _pluginmanager.hook
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if plugins:
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for plugin in plugins:
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_pluginmanager.register(plugin)
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return hook.pytest_cmdline_parse(
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pluginmanager=_pluginmanager, args=args)
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def main(args=None, plugins=None):
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""" returned exit code integer, after an in-process testing run
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with the given command line arguments, preloading an optional list
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of passed in plugin objects. """
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try:
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config = _prepareconfig(args, plugins)
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exitstatus = config.hook.pytest_cmdline_main(config=config)
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except UsageError:
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e = sys.exc_info()[1]
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sys.stderr.write("ERROR: %s\n" %(e.args[0],))
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exitstatus = 3
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return exitstatus
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class UsageError(Exception):
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""" error in py.test usage or invocation"""
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