745 lines
26 KiB
Python
745 lines
26 KiB
Python
""" core implementation of testing process: init, session, runtest loop. """
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import py
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import pytest, _pytest
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import os, sys, imp
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from _pytest.monkeypatch import monkeypatch
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tracebackcutdir = py.path.local(_pytest.__file__).dirpath()
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# exitcodes for the command line
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EXIT_OK = 0
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EXIT_TESTSFAILED = 1
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EXIT_INTERRUPTED = 2
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EXIT_INTERNALERROR = 3
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EXIT_USAGEERROR = 4
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name_re = py.std.re.compile("^[a-zA-Z_]\w*$")
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def pytest_addoption(parser):
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parser.addini("norecursedirs", "directory patterns to avoid for recursion",
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type="args", default=('.*', 'CVS', '_darcs', '{arch}'))
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#parser.addini("dirpatterns",
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# "patterns specifying possible locations of test files",
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# type="linelist", default=["**/test_*.txt",
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# "**/test_*.py", "**/*_test.py"]
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#)
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group = parser.getgroup("general", "running and selection options")
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group._addoption('-x', '--exitfirst', action="store_true", default=False,
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dest="exitfirst",
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help="exit instantly on first error or failed test."),
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group._addoption('--maxfail', metavar="num",
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action="store", type="int", dest="maxfail", default=0,
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help="exit after first num failures or errors.")
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group._addoption('--strict', action="store_true",
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help="run pytest in strict mode, warnings become errors.")
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group = parser.getgroup("collect", "collection")
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group.addoption('--collectonly',
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action="store_true", dest="collectonly",
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help="only collect tests, don't execute them."),
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group.addoption('--pyargs', action="store_true",
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help="try to interpret all arguments as python packages.")
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group.addoption("--ignore", action="append", metavar="path",
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help="ignore path during collection (multi-allowed).")
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group.addoption('--confcutdir', dest="confcutdir", default=None,
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metavar="dir",
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help="only load conftest.py's relative to specified dir.")
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group = parser.getgroup("debugconfig",
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"test session debugging and configuration")
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group.addoption('--basetemp', dest="basetemp", default=None, metavar="dir",
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help="base temporary directory for this test run.")
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def pytest_namespace():
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collect = dict(Item=Item, Collector=Collector, File=File, Session=Session)
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return dict(collect=collect)
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def pytest_configure(config):
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py.test.config = config # compatibiltiy
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if config.option.exitfirst:
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config.option.maxfail = 1
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def wrap_session(config, doit):
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"""Skeleton command line program"""
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session = Session(config)
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session.exitstatus = EXIT_OK
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initstate = 0
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try:
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try:
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config.pluginmanager.do_configure(config)
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initstate = 1
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config.hook.pytest_sessionstart(session=session)
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initstate = 2
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doit(config, session)
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except pytest.UsageError:
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msg = sys.exc_info()[1].args[0]
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sys.stderr.write("ERROR: %s\n" %(msg,))
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session.exitstatus = EXIT_USAGEERROR
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except KeyboardInterrupt:
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excinfo = py.code.ExceptionInfo()
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config.hook.pytest_keyboard_interrupt(excinfo=excinfo)
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session.exitstatus = EXIT_INTERRUPTED
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except:
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excinfo = py.code.ExceptionInfo()
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config.pluginmanager.notify_exception(excinfo, config.option)
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session.exitstatus = EXIT_INTERNALERROR
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if excinfo.errisinstance(SystemExit):
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sys.stderr.write("mainloop: caught Spurious SystemExit!\n")
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finally:
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if initstate >= 2:
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config.hook.pytest_sessionfinish(session=session,
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exitstatus=session.exitstatus or (session._testsfailed and 1))
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if not session.exitstatus and session._testsfailed:
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session.exitstatus = EXIT_TESTSFAILED
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if initstate >= 1:
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config.pluginmanager.do_unconfigure(config)
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return session.exitstatus
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def pytest_cmdline_main(config):
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return wrap_session(config, _main)
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def _main(config, session):
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""" default command line protocol for initialization, session,
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running tests and reporting. """
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config.hook.pytest_collection(session=session)
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config.hook.pytest_runtestloop(session=session)
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def pytest_collection(session):
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return session.perform_collect()
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def pytest_runtestloop(session):
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if session.config.option.collectonly:
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return True
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for i, item in enumerate(session.items):
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try:
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nextitem = session.items[i+1]
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except IndexError:
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nextitem = None
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item.config.hook.pytest_runtest_protocol(item=item, nextitem=nextitem)
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if session.shouldstop:
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raise session.Interrupted(session.shouldstop)
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return True
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def pytest_ignore_collect(path, config):
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p = path.dirpath()
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ignore_paths = config._getconftest_pathlist("collect_ignore", path=p)
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ignore_paths = ignore_paths or []
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excludeopt = config.getvalue("ignore")
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if excludeopt:
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ignore_paths.extend([py.path.local(x) for x in excludeopt])
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return path in ignore_paths
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class HookProxy:
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def __init__(self, fspath, config):
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self.fspath = fspath
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self.config = config
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def __getattr__(self, name):
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hookmethod = getattr(self.config.hook, name)
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def call_matching_hooks(**kwargs):
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plugins = self.config._getmatchingplugins(self.fspath)
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return hookmethod.pcall(plugins, **kwargs)
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return call_matching_hooks
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def compatproperty(name):
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def fget(self):
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# deprecated - use pytest.name
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return getattr(pytest, name)
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return property(fget)
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def pyobj_property(name):
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def get(self):
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node = self.getparent(getattr(pytest, name))
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if node is not None:
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return node.obj
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doc = "python %s object this node was collected from (can be None)." % (
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name.lower(),)
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return property(get, None, None, doc)
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class Request(object):
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_argprefix = "pytest_funcarg__"
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class LookupError(LookupError):
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""" error while performing funcarg factory lookup. """
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def _initattr(self):
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self._name2factory = {}
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self._currentarg = None
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@property
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def _plugins(self):
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extra = [obj for obj in (self.module, self.instance) if obj]
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return self.getplugins() + extra
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def _getscopeitem(self, scope):
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if scope == "function":
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return self
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elif scope == "session":
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return None
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elif scope == "class":
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x = self.getparent(pytest.Class)
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if x is not None:
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return x
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scope = "module"
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if scope == "module":
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return self.getparent(pytest.Module)
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raise ValueError("unknown scope %r" %(scope,))
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def getfuncargvalue(self, argname):
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""" Retrieve a named function argument value.
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This function looks up a matching factory and invokes
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it to obtain the return value. The factory receives
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the same request object and can itself perform recursive
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calls to this method, effectively allowing to make use of
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multiple other funcarg values or to decorate values from
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other name-matching factories.
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"""
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try:
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return self.funcargs[argname]
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except KeyError:
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pass
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except TypeError:
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self.funcargs = getattr(self, "_funcargs", {})
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if argname not in self._name2factory:
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self._name2factory[argname] = self.config.pluginmanager.listattr(
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plugins=self._plugins,
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attrname=self._argprefix + str(argname)
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)
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#else: we are called recursively
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if not self._name2factory[argname]:
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self._raiselookupfailed(argname)
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funcargfactory = self._name2factory[argname].pop()
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oldarg = self._currentarg
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mp = monkeypatch()
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mp.setattr(self, '_currentarg', argname)
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try:
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param = self.callspec.getparam(argname)
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except (AttributeError, ValueError):
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pass
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else:
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mp.setattr(self, 'param', param, raising=False)
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try:
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self.funcargs[argname] = res = funcargfactory(self)
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finally:
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mp.undo()
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return res
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def addfinalizer(self, finalizer):
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""" add a no-args finalizer function to be called when the underlying
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node is torn down."""
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self.session._setupstate.addfinalizer(finalizer, self)
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def cached_setup(self, setup, teardown=None,
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scope="module", extrakey=None):
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""" Return a cached testing resource created by ``setup`` &
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detroyed by a respective ``teardown(resource)`` call.
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:arg teardown: function receiving a previously setup resource.
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:arg setup: a no-argument function creating a resource.
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:arg scope: a string value out of ``function``, ``class``, ``module``
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or ``session`` indicating the caching lifecycle of the resource.
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:arg extrakey: added to internal caching key.
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"""
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if not hasattr(self.config, '_setupcache'):
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self.config._setupcache = {} # XXX weakref?
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colitem = self._getscopeitem(scope)
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cachekey = (self._currentarg, colitem, extrakey)
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cache = self.config._setupcache
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try:
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val = cache[cachekey]
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except KeyError:
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val = setup()
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cache[cachekey] = val
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if teardown is not None:
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def finalizer():
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del cache[cachekey]
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teardown(val)
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self.session._setupstate.addfinalizer(finalizer, colitem)
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return val
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def _raiselookupfailed(self, argname):
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available = []
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for plugin in self._plugins:
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for name in vars(plugin):
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if name.startswith(self._argprefix):
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name = name[len(self._argprefix):]
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if name not in available:
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available.append(name)
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fspath, lineno, msg = self.reportinfo()
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msg = "LookupError: no factory found for function argument %r" % (argname,)
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msg += "\n available funcargs: %s" %(", ".join(available),)
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msg += "\n use 'py.test --funcargs [testpath]' for help on them."
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raise self.LookupError(msg)
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class Node(object):
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""" base class for Collector and Item the test collection tree.
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Collector subclasses have children, Items are terminal nodes."""
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def __init__(self, name, parent=None, config=None, session=None):
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#: a unique name within the scope of the parent node
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self.name = name
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#: the parent collector node.
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self.parent = parent
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#: the pytest config object
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self.config = config or parent.config
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#: the session this node is part of
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self.session = session or parent.session
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#: filesystem path where this node was collected from (can be None)
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self.fspath = getattr(parent, 'fspath', None)
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#: keywords on this node (node name is always contained)
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self.keywords = {self.name: True}
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#: fspath sensitive hook proxy used to call pytest hooks
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self.ihook = self.session.gethookproxy(self.fspath)
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Module = compatproperty("Module")
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Class = compatproperty("Class")
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Instance = compatproperty("Instance")
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Function = compatproperty("Function")
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File = compatproperty("File")
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Item = compatproperty("Item")
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module = pyobj_property("Module")
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cls = pyobj_property("Class")
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instance = pyobj_property("Instance")
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def _getcustomclass(self, name):
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cls = getattr(self, name)
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if cls != getattr(pytest, name):
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py.log._apiwarn("2.0", "use of node.%s is deprecated, "
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"use pytest_pycollect_makeitem(...) to create custom "
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"collection nodes" % name)
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return cls
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def __repr__(self):
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return "<%s %r>" %(self.__class__.__name__,
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getattr(self, 'name', None))
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# methods for ordering nodes
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@property
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def nodeid(self):
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""" a ::-separated string denoting its collection tree address. """
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try:
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return self._nodeid
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except AttributeError:
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self._nodeid = x = self._makeid()
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return x
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def _makeid(self):
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return self.parent.nodeid + "::" + self.name
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def __eq__(self, other):
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if not isinstance(other, Node):
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return False
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return (self.__class__ == other.__class__ and
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self.name == other.name and self.parent == other.parent)
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def __ne__(self, other):
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return not self == other
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def __hash__(self):
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return hash((self.name, self.parent))
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def setup(self):
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pass
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def teardown(self):
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pass
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def _memoizedcall(self, attrname, function):
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exattrname = "_ex_" + attrname
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failure = getattr(self, exattrname, None)
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if failure is not None:
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py.builtin._reraise(failure[0], failure[1], failure[2])
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if hasattr(self, attrname):
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return getattr(self, attrname)
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try:
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res = function()
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except py.builtin._sysex:
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raise
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except:
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failure = py.std.sys.exc_info()
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setattr(self, exattrname, failure)
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raise
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setattr(self, attrname, res)
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return res
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def listchain(self):
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""" return list of all parent collectors up to self,
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starting from root of collection tree. """
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chain = []
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item = self
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while item is not None:
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chain.append(item)
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item = item.parent
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chain.reverse()
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return chain
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def listnames(self):
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return [x.name for x in self.listchain()]
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def getplugins(self):
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return self.config._getmatchingplugins(self.fspath)
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def getparent(self, cls):
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current = self
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while current and not isinstance(current, cls):
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current = current.parent
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return current
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def _prunetraceback(self, excinfo):
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pass
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def _repr_failure_py(self, excinfo, style=None):
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if self.config.option.fulltrace:
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style="long"
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else:
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self._prunetraceback(excinfo)
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# XXX should excinfo.getrepr record all data and toterminal()
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# process it?
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if style is None:
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if self.config.option.tbstyle == "short":
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style = "short"
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else:
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style = "long"
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return excinfo.getrepr(funcargs=True,
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showlocals=self.config.option.showlocals,
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style=style)
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repr_failure = _repr_failure_py
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class Collector(Node):
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""" Collector instances create children through collect()
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and thus iteratively build a tree.
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"""
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class CollectError(Exception):
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""" an error during collection, contains a custom message. """
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def collect(self):
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""" returns a list of children (items and collectors)
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for this collection node.
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"""
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raise NotImplementedError("abstract")
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def repr_failure(self, excinfo):
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""" represent a collection failure. """
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if excinfo.errisinstance(self.CollectError):
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exc = excinfo.value
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return str(exc.args[0])
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return self._repr_failure_py(excinfo, style="short")
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def _memocollect(self):
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""" internal helper method to cache results of calling collect(). """
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return self._memoizedcall('_collected', lambda: list(self.collect()))
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def _prunetraceback(self, excinfo):
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if hasattr(self, 'fspath'):
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path = self.fspath
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traceback = excinfo.traceback
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ntraceback = traceback.cut(path=self.fspath)
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if ntraceback == traceback:
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ntraceback = ntraceback.cut(excludepath=tracebackcutdir)
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excinfo.traceback = ntraceback.filter()
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class FSCollector(Collector):
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def __init__(self, fspath, parent=None, config=None, session=None):
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fspath = py.path.local(fspath) # xxx only for test_resultlog.py?
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name = fspath.basename
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if parent is not None:
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rel = fspath.relto(parent.fspath)
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if rel:
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name = rel
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name = name.replace(os.sep, "/")
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super(FSCollector, self).__init__(name, parent, config, session)
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self.fspath = fspath
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def _makeid(self):
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if self == self.session:
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return "."
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relpath = self.session.fspath.bestrelpath(self.fspath)
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if os.sep != "/":
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relpath = relpath.replace(os.sep, "/")
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return relpath
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class File(FSCollector):
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""" base class for collecting tests from a file. """
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class Item(Node, Request):
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""" a basic test invocation item. Note that for a single function
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there might be multiple test invocation items.
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"""
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nextitem = None
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def __init__(self, name, parent=None, config=None, session=None):
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super(Item, self).__init__(name, parent, config, session)
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self._initattr()
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self.funcargs = None # later set to a dict from fillfuncargs() or
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# from getfuncargvalue(). Setting it to
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# None prevents users from performing
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# "name in item.funcargs" checks too early.
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def reportinfo(self):
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return self.fspath, None, ""
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def applymarker(self, marker):
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""" Apply a marker to this item. This method is
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useful if you have several parametrized function
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and want to mark a single one of them.
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:arg marker: a :py:class:`_pytest.mark.MarkDecorator` object
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created by a call to ``py.test.mark.NAME(...)``.
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"""
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if not isinstance(marker, pytest.mark.XYZ.__class__):
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raise ValueError("%r is not a py.test.mark.* object")
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self.keywords[marker.markname] = marker
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@property
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def location(self):
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try:
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return self._location
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except AttributeError:
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location = self.reportinfo()
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# bestrelpath is a quite slow function
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cache = self.config.__dict__.setdefault("_bestrelpathcache", {})
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try:
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fspath = cache[location[0]]
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except KeyError:
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fspath = self.session.fspath.bestrelpath(location[0])
|
|
cache[location[0]] = fspath
|
|
location = (fspath, location[1], str(location[2]))
|
|
self._location = location
|
|
return location
|
|
|
|
class NoMatch(Exception):
|
|
""" raised if matching cannot locate a matching names. """
|
|
|
|
class Session(FSCollector):
|
|
class Interrupted(KeyboardInterrupt):
|
|
""" signals an interrupted test run. """
|
|
__module__ = 'builtins' # for py3
|
|
|
|
def __init__(self, config):
|
|
super(Session, self).__init__(py.path.local(), parent=None,
|
|
config=config, session=self)
|
|
assert self.config.pluginmanager.register(
|
|
self, name="session", prepend=True)
|
|
self._testsfailed = 0
|
|
self.shouldstop = False
|
|
self.trace = config.trace.root.get("collection")
|
|
self._norecursepatterns = config.getini("norecursedirs")
|
|
|
|
def pytest_collectstart(self):
|
|
if self.shouldstop:
|
|
raise self.Interrupted(self.shouldstop)
|
|
|
|
def pytest_runtest_logreport(self, report):
|
|
if report.failed and not hasattr(report, 'wasxfail'):
|
|
self._testsfailed += 1
|
|
maxfail = self.config.getvalue("maxfail")
|
|
if maxfail and self._testsfailed >= maxfail:
|
|
self.shouldstop = "stopping after %d failures" % (
|
|
self._testsfailed)
|
|
pytest_collectreport = pytest_runtest_logreport
|
|
|
|
def isinitpath(self, path):
|
|
return path in self._initialpaths
|
|
|
|
def gethookproxy(self, fspath):
|
|
return HookProxy(fspath, self.config)
|
|
|
|
def perform_collect(self, args=None, genitems=True):
|
|
hook = self.config.hook
|
|
try:
|
|
items = self._perform_collect(args, genitems)
|
|
hook.pytest_collection_modifyitems(session=self,
|
|
config=self.config, items=items)
|
|
finally:
|
|
hook.pytest_collection_finish(session=self)
|
|
return items
|
|
|
|
def _perform_collect(self, args, genitems):
|
|
if args is None:
|
|
args = self.config.args
|
|
self.trace("perform_collect", self, args)
|
|
self.trace.root.indent += 1
|
|
self._notfound = []
|
|
self._initialpaths = set()
|
|
self._initialparts = []
|
|
self.items = items = []
|
|
for arg in args:
|
|
parts = self._parsearg(arg)
|
|
self._initialparts.append(parts)
|
|
self._initialpaths.add(parts[0])
|
|
self.ihook.pytest_collectstart(collector=self)
|
|
rep = self.ihook.pytest_make_collect_report(collector=self)
|
|
self.ihook.pytest_collectreport(report=rep)
|
|
self.trace.root.indent -= 1
|
|
if self._notfound:
|
|
for arg, exc in self._notfound:
|
|
line = "(no name %r in any of %r)" % (arg, exc.args[0])
|
|
raise pytest.UsageError("not found: %s\n%s" %(arg, line))
|
|
if not genitems:
|
|
return rep.result
|
|
else:
|
|
if rep.passed:
|
|
for node in rep.result:
|
|
self.items.extend(self.genitems(node))
|
|
return items
|
|
|
|
def collect(self):
|
|
for parts in self._initialparts:
|
|
arg = "::".join(map(str, parts))
|
|
self.trace("processing argument", arg)
|
|
self.trace.root.indent += 1
|
|
try:
|
|
for x in self._collect(arg):
|
|
yield x
|
|
except NoMatch:
|
|
# we are inside a make_report hook so
|
|
# we cannot directly pass through the exception
|
|
self._notfound.append((arg, sys.exc_info()[1]))
|
|
self.trace.root.indent -= 1
|
|
break
|
|
self.trace.root.indent -= 1
|
|
|
|
def _collect(self, arg):
|
|
names = self._parsearg(arg)
|
|
path = names.pop(0)
|
|
if path.check(dir=1):
|
|
assert not names, "invalid arg %r" %(arg,)
|
|
for path in path.visit(fil=lambda x: x.check(file=1),
|
|
rec=self._recurse, bf=True, sort=True):
|
|
for x in self._collectfile(path):
|
|
yield x
|
|
else:
|
|
assert path.check(file=1)
|
|
for x in self.matchnodes(self._collectfile(path), names):
|
|
yield x
|
|
|
|
def _collectfile(self, path):
|
|
ihook = self.gethookproxy(path)
|
|
if not self.isinitpath(path):
|
|
if ihook.pytest_ignore_collect(path=path, config=self.config):
|
|
return ()
|
|
return ihook.pytest_collect_file(path=path, parent=self)
|
|
|
|
def _recurse(self, path):
|
|
ihook = self.gethookproxy(path.dirpath())
|
|
if ihook.pytest_ignore_collect(path=path, config=self.config):
|
|
return
|
|
for pat in self._norecursepatterns:
|
|
if path.check(fnmatch=pat):
|
|
return False
|
|
ihook = self.gethookproxy(path)
|
|
ihook.pytest_collect_directory(path=path, parent=self)
|
|
return True
|
|
|
|
def _tryconvertpyarg(self, x):
|
|
mod = None
|
|
path = [os.path.abspath('.')] + sys.path
|
|
for name in x.split('.'):
|
|
# ignore anything that's not a proper name here
|
|
# else something like --pyargs will mess up '.'
|
|
# since imp.find_module will actually sometimes work for it
|
|
# but it's supposed to be considered a filesystem path
|
|
# not a package
|
|
if name_re.match(name) is None:
|
|
return x
|
|
try:
|
|
fd, mod, type_ = imp.find_module(name, path)
|
|
except ImportError:
|
|
return x
|
|
else:
|
|
if fd is not None:
|
|
fd.close()
|
|
|
|
if type_[2] != imp.PKG_DIRECTORY:
|
|
path = [os.path.dirname(mod)]
|
|
else:
|
|
path = [mod]
|
|
return mod
|
|
|
|
def _parsearg(self, arg):
|
|
""" return (fspath, names) tuple after checking the file exists. """
|
|
arg = str(arg)
|
|
if self.config.option.pyargs:
|
|
arg = self._tryconvertpyarg(arg)
|
|
parts = str(arg).split("::")
|
|
relpath = parts[0].replace("/", os.sep)
|
|
path = self.fspath.join(relpath, abs=True)
|
|
if not path.check():
|
|
if self.config.option.pyargs:
|
|
msg = "file or package not found: "
|
|
else:
|
|
msg = "file not found: "
|
|
raise pytest.UsageError(msg + arg)
|
|
parts[0] = path
|
|
return parts
|
|
|
|
def matchnodes(self, matching, names):
|
|
self.trace("matchnodes", matching, names)
|
|
self.trace.root.indent += 1
|
|
nodes = self._matchnodes(matching, names)
|
|
num = len(nodes)
|
|
self.trace("matchnodes finished -> ", num, "nodes")
|
|
self.trace.root.indent -= 1
|
|
if num == 0:
|
|
raise NoMatch(matching, names[:1])
|
|
return nodes
|
|
|
|
def _matchnodes(self, matching, names):
|
|
if not matching or not names:
|
|
return matching
|
|
name = names[0]
|
|
assert name
|
|
nextnames = names[1:]
|
|
resultnodes = []
|
|
for node in matching:
|
|
if isinstance(node, pytest.Item):
|
|
if not names:
|
|
resultnodes.append(node)
|
|
continue
|
|
assert isinstance(node, pytest.Collector)
|
|
node.ihook.pytest_collectstart(collector=node)
|
|
rep = node.ihook.pytest_make_collect_report(collector=node)
|
|
if rep.passed:
|
|
has_matched = False
|
|
for x in rep.result:
|
|
if x.name == name:
|
|
resultnodes.extend(self.matchnodes([x], nextnames))
|
|
has_matched = True
|
|
# XXX accept IDs that don't have "()" for class instances
|
|
if not has_matched and len(rep.result) == 1 and x.name == "()":
|
|
nextnames.insert(0, name)
|
|
resultnodes.extend(self.matchnodes([x], nextnames))
|
|
node.ihook.pytest_collectreport(report=rep)
|
|
return resultnodes
|
|
|
|
def genitems(self, node):
|
|
self.trace("genitems", node)
|
|
if isinstance(node, pytest.Item):
|
|
node.ihook.pytest_itemcollected(item=node)
|
|
yield node
|
|
else:
|
|
assert isinstance(node, pytest.Collector)
|
|
node.ihook.pytest_collectstart(collector=node)
|
|
rep = node.ihook.pytest_make_collect_report(collector=node)
|
|
if rep.passed:
|
|
for subnode in rep.result:
|
|
for x in self.genitems(subnode):
|
|
yield x
|
|
node.ihook.pytest_collectreport(report=rep)
|