Source code for _pytest.pytester

"""(disabled by default) support for testing pytest and pytest plugins."""
import gc
import importlib
import os
import platform
import re
import subprocess
import sys
import time
import traceback
from import Sequence
from fnmatch import fnmatch
from weakref import WeakKeyDictionary

import py

import pytest
from _pytest._code import Source
from _pytest._io.saferepr import saferepr
from _pytest.capture import MultiCapture
from _pytest.capture import SysCapture
from _pytest.main import ExitCode
from _pytest.main import Session
from _pytest.monkeypatch import MonkeyPatch
from _pytest.pathlib import Path

IGNORE_PAM = [  # filenames added when obtaining details about the current user

def pytest_addoption(parser):
        help="run FD checks if lsof is available",

        choices=("inprocess", "subprocess"),
            "run pytest sub runs in tests using an 'inprocess' "
            "or 'subprocess' (python -m main) method"

        "pytester_example_dir", help="directory to take the pytester example files from"

def pytest_configure(config):
    if config.getvalue("lsof"):
        checker = LsofFdLeakChecker()
        if checker.matching_platform():

        "pytester_example_path(*path_segments): join the given path "
        "segments to `pytester_example_dir` for this test.",

class LsofFdLeakChecker:
    def get_open_files(self):
        out = self._exec_lsof()
        open_files = self._parse_lsof_output(out)
        return open_files

    def _exec_lsof(self):
        pid = os.getpid()
        # py3: use subprocess.DEVNULL directly.
        with open(os.devnull, "wb") as devnull:
            return subprocess.check_output(
                ("lsof", "-Ffn0", "-p", str(pid)), stderr=devnull

    def _parse_lsof_output(self, out):
        def isopen(line):
            return line.startswith("f") and (
                "deleted" not in line
                and "mem" not in line
                and "txt" not in line
                and "cwd" not in line

        open_files = []

        for line in out.split("\n"):
            if isopen(line):
                fields = line.split("\0")
                fd = fields[0][1:]
                filename = fields[1][1:]
                if filename in IGNORE_PAM:
                if filename.startswith("/"):
                    open_files.append((fd, filename))

        return open_files

    def matching_platform(self):
            subprocess.check_output(("lsof", "-v"))
        except (OSError, subprocess.CalledProcessError):
            return False
            return True

    @pytest.hookimpl(hookwrapper=True, tryfirst=True)
    def pytest_runtest_protocol(self, item):
        lines1 = self.get_open_files()
        if hasattr(sys, "pypy_version_info"):
        lines2 = self.get_open_files()

        new_fds = {t[0] for t in lines2} - {t[0] for t in lines1}
        leaked_files = [t for t in lines2 if t[0] in new_fds]
        if leaked_files:
            error = []
            error.append("***** %s FD leakage detected" % len(leaked_files))
            error.extend([str(f) for f in leaked_files])
            error.append("*** Before:")
            error.extend([str(f) for f in lines1])
            error.append("*** After:")
            error.extend([str(f) for f in lines2])
            error.append("*** function %s:%s: %s " % item.location)
            error.append("See issue #2366")

# used at least by pytest-xdist plugin

def _pytest(request):
    """Return a helper which offers a gethookrecorder(hook) method which
    returns a HookRecorder instance which helps to make assertions about called

    return PytestArg(request)

class PytestArg:
    def __init__(self, request):
        self.request = request

    def gethookrecorder(self, hook):
        hookrecorder = HookRecorder(hook._pm)
        return hookrecorder

def get_public_names(values):
    """Only return names from iterator values without a leading underscore."""
    return [x for x in values if x[0] != "_"]

class ParsedCall:
    def __init__(self, name, kwargs):
        self._name = name

    def __repr__(self):
        d = self.__dict__.copy()
        del d["_name"]
        return "<ParsedCall {!r}(**{!r})>".format(self._name, d)

class HookRecorder:
    """Record all hooks called in a plugin manager.

    This wraps all the hook calls in the plugin manager, recording each call
    before propagating the normal calls.


    def __init__(self, pluginmanager):
        self._pluginmanager = pluginmanager
        self.calls = []

        def before(hook_name, hook_impls, kwargs):
            self.calls.append(ParsedCall(hook_name, kwargs))

        def after(outcome, hook_name, hook_impls, kwargs):

        self._undo_wrapping = pluginmanager.add_hookcall_monitoring(before, after)

    def finish_recording(self):

    def getcalls(self, names):
        if isinstance(names, str):
            names = names.split()
        return [call for call in self.calls if call._name in names]

    def assert_contains(self, entries):
        __tracebackhide__ = True
        i = 0
        entries = list(entries)
        backlocals = sys._getframe(1).f_locals
        while entries:
            name, check = entries.pop(0)
            for ind, call in enumerate(self.calls[i:]):
                if call._name == name:
                    print("NAMEMATCH", name, call)
                    if eval(check, backlocals, call.__dict__):
                        print("CHECKERMATCH", repr(check), "->", call)
                        print("NOCHECKERMATCH", repr(check), "-", call)
                    i += ind + 1
                print("NONAMEMATCH", name, "with", call)
      "could not find {!r} check {!r}".format(name, check))

    def popcall(self, name):
        __tracebackhide__ = True
        for i, call in enumerate(self.calls):
            if call._name == name:
                del self.calls[i]
                return call
        lines = ["could not find call {!r}, in:".format(name)]
        lines.extend(["  %s" % x for x in self.calls])"\n".join(lines))

    def getcall(self, name):
        values = self.getcalls(name)
        assert len(values) == 1, (name, values)
        return values[0]

    # functionality for test reports

    def getreports(self, names="pytest_runtest_logreport pytest_collectreport"):
        return [ for x in self.getcalls(names)]

    def matchreport(
        names="pytest_runtest_logreport pytest_collectreport",
        """return a testreport whose dotted import path matches"""
        values = []
        for rep in self.getreports(names=names):
            if not when and rep.when != "call" and rep.passed:
                # setup/teardown passing reports - let's ignore those
            if when and rep.when != when:
            if not inamepart or inamepart in rep.nodeid.split("::"):
        if not values:
            raise ValueError(
                "could not find test report matching %r: "
                "no test reports at all!" % (inamepart,)
        if len(values) > 1:
            raise ValueError(
                "found 2 or more testreports matching {!r}: {}".format(
                    inamepart, values
        return values[0]

    def getfailures(self, names="pytest_runtest_logreport pytest_collectreport"):
        return [rep for rep in self.getreports(names) if rep.failed]

    def getfailedcollections(self):
        return self.getfailures("pytest_collectreport")

    def listoutcomes(self):
        passed = []
        skipped = []
        failed = []
        for rep in self.getreports("pytest_collectreport pytest_runtest_logreport"):
            if rep.passed:
                if rep.when == "call":
            elif rep.skipped:
                assert rep.failed, "Unexpected outcome: {!r}".format(rep)
        return passed, skipped, failed

    def countoutcomes(self):
        return [len(x) for x in self.listoutcomes()]

    def assertoutcome(self, passed=0, skipped=0, failed=0):
        realpassed, realskipped, realfailed = self.listoutcomes()
        assert passed == len(realpassed)
        assert skipped == len(realskipped)
        assert failed == len(realfailed)

    def clear(self):
        self.calls[:] = []

def linecomp(request):
    return LineComp()

def LineMatcher_fixture(request):
    return LineMatcher

def testdir(request, tmpdir_factory):
    return Testdir(request, tmpdir_factory)

def _sys_snapshot():
    snappaths = SysPathsSnapshot()
    snapmods = SysModulesSnapshot()

def _config_for_test():
    from _pytest.config import get_config

    config = get_config()
    yield config
    config._ensure_unconfigure()  # cleanup, e.g. capman closing tmpfiles.

# regex to match the session duration string in the summary: "74.34s"
rex_session_duration = re.compile(r"\d+\.\d\ds")
# regex to match all the counts and phrases in the summary line: "34 passed, 111 skipped"
rex_outcome = re.compile(r"(\d+) (\w+)")

[docs]class RunResult: """The result of running a command. Attributes: :ivar ret: the return value :ivar outlines: list of lines captured from stdout :ivar errlines: list of lines captured from stderr :ivar stdout: :py:class:`LineMatcher` of stdout, use ``stdout.str()`` to reconstruct stdout or the commonly used ``stdout.fnmatch_lines()`` method :ivar stderr: :py:class:`LineMatcher` of stderr :ivar duration: duration in seconds """ def __init__(self, ret, outlines, errlines, duration): self.ret = ret self.outlines = outlines self.errlines = errlines self.stdout = LineMatcher(outlines) self.stderr = LineMatcher(errlines) self.duration = duration def __repr__(self): return ( "<RunResult ret=%r len(stdout.lines)=%d len(stderr.lines)=%d duration=%.2fs>" % (self.ret, len(self.stdout.lines), len(self.stderr.lines), self.duration) )
[docs] def parseoutcomes(self): """Return a dictionary of outcomestring->num from parsing the terminal output that the test process produced. """ for line in reversed(self.outlines): if outcomes = rex_outcome.findall(line) return {noun: int(count) for (count, noun) in outcomes} raise ValueError("Pytest terminal summary report not found")
[docs] def assert_outcomes( self, passed=0, skipped=0, failed=0, error=0, xpassed=0, xfailed=0 ): """Assert that the specified outcomes appear with the respective numbers (0 means it didn't occur) in the text output from a test run. """ d = self.parseoutcomes() obtained = { "passed": d.get("passed", 0), "skipped": d.get("skipped", 0), "failed": d.get("failed", 0), "error": d.get("error", 0), "xpassed": d.get("xpassed", 0), "xfailed": d.get("xfailed", 0), } expected = { "passed": passed, "skipped": skipped, "failed": failed, "error": error, "xpassed": xpassed, "xfailed": xfailed, } assert obtained == expected
class CwdSnapshot: def __init__(self): self.__saved = os.getcwd() def restore(self): os.chdir(self.__saved) class SysModulesSnapshot: def __init__(self, preserve=None): self.__preserve = preserve self.__saved = dict(sys.modules) def restore(self): if self.__preserve: self.__saved.update( (k, m) for k, m in sys.modules.items() if self.__preserve(k) ) sys.modules.clear() sys.modules.update(self.__saved) class SysPathsSnapshot: def __init__(self): self.__saved = list(sys.path), list(sys.meta_path) def restore(self): sys.path[:], sys.meta_path[:] = self.__saved
[docs]class Testdir: """Temporary test directory with tools to test/run pytest itself. This is based on the ``tmpdir`` fixture but provides a number of methods which aid with testing pytest itself. Unless :py:meth:`chdir` is used all methods will use :py:attr:`tmpdir` as their current working directory. Attributes: :ivar tmpdir: The :py:class:`py.path.local` instance of the temporary directory. :ivar plugins: A list of plugins to use with :py:meth:`parseconfig` and :py:meth:`runpytest`. Initially this is an empty list but plugins can be added to the list. The type of items to add to the list depends on the method using them so refer to them for details. """ CLOSE_STDIN = object
[docs] class TimeoutExpired(Exception): pass
def __init__(self, request, tmpdir_factory): self.request = request self._mod_collections = WeakKeyDictionary() name = request.function.__name__ self.tmpdir = tmpdir_factory.mktemp(name, numbered=True) self.test_tmproot = tmpdir_factory.mktemp("tmp-" + name, numbered=True) self.plugins = [] self._cwd_snapshot = CwdSnapshot() self._sys_path_snapshot = SysPathsSnapshot() self._sys_modules_snapshot = self.__take_sys_modules_snapshot() self.chdir() self.request.addfinalizer(self.finalize) method = self.request.config.getoption("--runpytest") if method == "inprocess": self._runpytest_method = self.runpytest_inprocess elif method == "subprocess": self._runpytest_method = self.runpytest_subprocess mp = self.monkeypatch = MonkeyPatch() mp.setenv("PYTEST_DEBUG_TEMPROOT", str(self.test_tmproot)) # Ensure no unexpected caching via tox. mp.delenv("TOX_ENV_DIR", raising=False) # Discard outer pytest options. mp.delenv("PYTEST_ADDOPTS", raising=False) # Environment (updates) for inner runs. tmphome = str(self.tmpdir) self._env_run_update = {"HOME": tmphome, "USERPROFILE": tmphome} def __repr__(self): return "<Testdir {!r}>".format(self.tmpdir) def __str__(self): return str(self.tmpdir)
[docs] def finalize(self): """Clean up global state artifacts. Some methods modify the global interpreter state and this tries to clean this up. It does not remove the temporary directory however so it can be looked at after the test run has finished. """ self._sys_modules_snapshot.restore() self._sys_path_snapshot.restore() self._cwd_snapshot.restore() self.monkeypatch.undo()
def __take_sys_modules_snapshot(self): # some zope modules used by twisted-related tests keep internal state # and can't be deleted; we had some trouble in the past with # `zope.interface` for example def preserve_module(name): return name.startswith("zope") return SysModulesSnapshot(preserve=preserve_module)
[docs] def make_hook_recorder(self, pluginmanager): """Create a new :py:class:`HookRecorder` for a PluginManager.""" pluginmanager.reprec = reprec = HookRecorder(pluginmanager) self.request.addfinalizer(reprec.finish_recording) return reprec
[docs] def chdir(self): """Cd into the temporary directory. This is done automatically upon instantiation. """ self.tmpdir.chdir()
def _makefile(self, ext, args, kwargs, encoding="utf-8"): items = list(kwargs.items()) def to_text(s): return s.decode(encoding) if isinstance(s, bytes) else str(s) if args: source = "\n".join(to_text(x) for x in args) basename = self.request.function.__name__ items.insert(0, (basename, source)) ret = None for basename, value in items: p = self.tmpdir.join(basename).new(ext=ext) p.dirpath().ensure_dir() source = Source(value) source = "\n".join(to_text(line) for line in source.lines) p.write(source.strip().encode(encoding), "wb") if ret is None: ret = p return ret
[docs] def makefile(self, ext, *args, **kwargs): r"""Create new file(s) in the testdir. :param str ext: The extension the file(s) should use, including the dot, e.g. `.py`. :param list[str] args: All args will be treated as strings and joined using newlines. The result will be written as contents to the file. The name of the file will be based on the test function requesting this fixture. :param kwargs: Each keyword is the name of a file, while the value of it will be written as contents of the file. Examples: .. code-block:: python testdir.makefile(".txt", "line1", "line2") testdir.makefile(".ini", pytest="[pytest]\naddopts=-rs\n") """ return self._makefile(ext, args, kwargs)
[docs] def makeconftest(self, source): """Write a file with 'source' as contents.""" return self.makepyfile(conftest=source)
[docs] def makeini(self, source): """Write a tox.ini file with 'source' as contents.""" return self.makefile(".ini", tox=source)
[docs] def getinicfg(self, source): """Return the pytest section from the tox.ini config file.""" p = self.makeini(source) return py.iniconfig.IniConfig(p)["pytest"]
[docs] def makepyfile(self, *args, **kwargs): """Shortcut for .makefile() with a .py extension.""" return self._makefile(".py", args, kwargs)
[docs] def maketxtfile(self, *args, **kwargs): """Shortcut for .makefile() with a .txt extension.""" return self._makefile(".txt", args, kwargs)
[docs] def syspathinsert(self, path=None): """Prepend a directory to sys.path, defaults to :py:attr:`tmpdir`. This is undone automatically when this object dies at the end of each test. """ if path is None: path = self.tmpdir self.monkeypatch.syspath_prepend(str(path))
[docs] def mkdir(self, name): """Create a new (sub)directory.""" return self.tmpdir.mkdir(name)
[docs] def mkpydir(self, name): """Create a new python package. This creates a (sub)directory with an empty ```` file so it gets recognised as a python package. """ p = self.mkdir(name) p.ensure("") return p
[docs] def copy_example(self, name=None): """Copy file from project's directory into the testdir. :param str name: The name of the file to copy. :return: path to the copied directory (inside ``self.tmpdir``). """ import warnings from _pytest.warning_types import PYTESTER_COPY_EXAMPLE warnings.warn(PYTESTER_COPY_EXAMPLE, stacklevel=2) example_dir = self.request.config.getini("pytester_example_dir") if example_dir is None: raise ValueError("pytester_example_dir is unset, can't copy examples") example_dir = self.request.config.rootdir.join(example_dir) for extra_element in self.request.node.iter_markers("pytester_example_path"): assert extra_element.args example_dir = example_dir.join(*extra_element.args) if name is None: func_name = self.request.function.__name__ maybe_dir = example_dir / func_name maybe_file = example_dir / (func_name + ".py") if maybe_dir.isdir(): example_path = maybe_dir elif maybe_file.isfile(): example_path = maybe_file else: raise LookupError( "{} cant be found as module or package in {}".format( func_name, example_dir.bestrelpath(self.request.config.rootdir) ) ) else: example_path = example_dir.join(name) if example_path.isdir() and not example_path.join("").isfile(): example_path.copy(self.tmpdir) return self.tmpdir elif example_path.isfile(): result = self.tmpdir.join(example_path.basename) example_path.copy(result) return result else: raise LookupError( 'example "{}" is not found as a file or directory'.format(example_path) )
Session = Session
[docs] def getnode(self, config, arg): """Return the collection node of a file. :param config: :py:class:`_pytest.config.Config` instance, see :py:meth:`parseconfig` and :py:meth:`parseconfigure` to create the configuration :param arg: a :py:class:`py.path.local` instance of the file """ session = Session(config) assert "::" not in str(arg) p = py.path.local(arg) config.hook.pytest_sessionstart(session=session) res = session.perform_collect([str(p)], genitems=False)[0] config.hook.pytest_sessionfinish(session=session, exitstatus=ExitCode.OK) return res
[docs] def getpathnode(self, path): """Return the collection node of a file. This is like :py:meth:`getnode` but uses :py:meth:`parseconfigure` to create the (configured) pytest Config instance. :param path: a :py:class:`py.path.local` instance of the file """ config = self.parseconfigure(path) session = Session(config) x = session.fspath.bestrelpath(path) config.hook.pytest_sessionstart(session=session) res = session.perform_collect([x], genitems=False)[0] config.hook.pytest_sessionfinish(session=session, exitstatus=ExitCode.OK) return res
[docs] def genitems(self, colitems): """Generate all test items from a collection node. This recurses into the collection node and returns a list of all the test items contained within. """ session = colitems[0].session result = [] for colitem in colitems: result.extend(session.genitems(colitem)) return result
[docs] def runitem(self, source): """Run the "test_func" Item. The calling test instance (class containing the test method) must provide a ``.getrunner()`` method which should return a runner which can run the test protocol for a single item, e.g. :py:func:`_pytest.runner.runtestprotocol`. """ # used from runner functional tests item = self.getitem(source) # the test class where we are called from wants to provide the runner testclassinstance = self.request.instance runner = testclassinstance.getrunner() return runner(item)
[docs] def inline_runsource(self, source, *cmdlineargs): """Run a test module in process using ``pytest.main()``. This run writes "source" into a temporary file and runs ``pytest.main()`` on it, returning a :py:class:`HookRecorder` instance for the result. :param source: the source code of the test module :param cmdlineargs: any extra command line arguments to use :return: :py:class:`HookRecorder` instance of the result """ p = self.makepyfile(source) values = list(cmdlineargs) + [p] return self.inline_run(*values)
[docs] def inline_genitems(self, *args): """Run ``pytest.main(['--collectonly'])`` in-process. Runs the :py:func:`pytest.main` function to run all of pytest inside the test process itself like :py:meth:`inline_run`, but returns a tuple of the collected items and a :py:class:`HookRecorder` instance. """ rec = self.inline_run("--collect-only", *args) items = [x.item for x in rec.getcalls("pytest_itemcollected")] return items, rec
[docs] def inline_run(self, *args, plugins=(), no_reraise_ctrlc=False): """Run ``pytest.main()`` in-process, returning a HookRecorder. Runs the :py:func:`pytest.main` function to run all of pytest inside the test process itself. This means it can return a :py:class:`HookRecorder` instance which gives more detailed results from that run than can be done by matching stdout/stderr from :py:meth:`runpytest`. :param args: command line arguments to pass to :py:func:`pytest.main` :kwarg plugins: extra plugin instances the ``pytest.main()`` instance should use. :kwarg no_reraise_ctrlc: typically we reraise keyboard interrupts from the child run. If True, the KeyboardInterrupt exception is captured. :return: a :py:class:`HookRecorder` instance """ # (maybe a cpython bug?) the importlib cache sometimes isn't updated # properly between file creation and inline_run (especially if imports # are interspersed with file creation) importlib.invalidate_caches() plugins = list(plugins) finalizers = [] try: # Do not load user config (during runs only). mp_run = MonkeyPatch() for k, v in self._env_run_update.items(): mp_run.setenv(k, v) finalizers.append(mp_run.undo) # Any sys.module or sys.path changes done while running pytest # inline should be reverted after the test run completes to avoid # clashing with later inline tests run within the same pytest test, # e.g. just because they use matching test module names. finalizers.append(self.__take_sys_modules_snapshot().restore) finalizers.append(SysPathsSnapshot().restore) # Important note: # - our tests should not leave any other references/registrations # laying around other than possibly loaded test modules # referenced from sys.modules, as nothing will clean those up # automatically rec = [] class Collect: def pytest_configure(x, config): rec.append(self.make_hook_recorder(config.pluginmanager)) plugins.append(Collect()) ret = pytest.main(list(args), plugins=plugins) if len(rec) == 1: reprec = rec.pop() else: class reprec: pass reprec.ret = ret # typically we reraise keyboard interrupts from the child run # because it's our user requesting interruption of the testing if ret == ExitCode.INTERRUPTED and not no_reraise_ctrlc: calls = reprec.getcalls("pytest_keyboard_interrupt") if calls and calls[-1].excinfo.type == KeyboardInterrupt: raise KeyboardInterrupt() return reprec finally: for finalizer in finalizers: finalizer()
[docs] def runpytest_inprocess(self, *args, **kwargs): """Return result of running pytest in-process, providing a similar interface to what self.runpytest() provides. """ syspathinsert = kwargs.pop("syspathinsert", False) if syspathinsert: self.syspathinsert() now = time.time() capture = MultiCapture(Capture=SysCapture) capture.start_capturing() try: try: reprec = self.inline_run(*args, **kwargs) except SystemExit as e: class reprec: ret = e.args[0] except Exception: traceback.print_exc() class reprec: ret = 3 finally: out, err = capture.readouterr() capture.stop_capturing() sys.stdout.write(out) sys.stderr.write(err) res = RunResult(reprec.ret, out.split("\n"), err.split("\n"), time.time() - now) res.reprec = reprec return res
[docs] def runpytest(self, *args, **kwargs): """Run pytest inline or in a subprocess, depending on the command line option "--runpytest" and return a :py:class:`RunResult`. """ args = self._ensure_basetemp(args) return self._runpytest_method(*args, **kwargs)
def _ensure_basetemp(self, args): args = list(args) for x in args: if str(x).startswith("--basetemp"): break else: args.append("--basetemp=%s" % self.tmpdir.dirpath("basetemp")) return args
[docs] def parseconfig(self, *args): """Return a new pytest Config instance from given commandline args. This invokes the pytest bootstrapping code in _pytest.config to create a new :py:class:`_pytest.core.PluginManager` and call the pytest_cmdline_parse hook to create a new :py:class:`_pytest.config.Config` instance. If :py:attr:`plugins` has been populated they should be plugin modules to be registered with the PluginManager. """ args = self._ensure_basetemp(args) import _pytest.config config = _pytest.config._prepareconfig(args, self.plugins) # we don't know what the test will do with this half-setup config # object and thus we make sure it gets unconfigured properly in any # case (otherwise capturing could still be active, for example) self.request.addfinalizer(config._ensure_unconfigure) return config
[docs] def parseconfigure(self, *args): """Return a new pytest configured Config instance. This returns a new :py:class:`_pytest.config.Config` instance like :py:meth:`parseconfig`, but also calls the pytest_configure hook. """ config = self.parseconfig(*args) config._do_configure() self.request.addfinalizer(config._ensure_unconfigure) return config
[docs] def getitem(self, source, funcname="test_func"): """Return the test item for a test function. This writes the source to a python file and runs pytest's collection on the resulting module, returning the test item for the requested function name. :param source: the module source :param funcname: the name of the test function for which to return a test item """ items = self.getitems(source) for item in items: if == funcname: return item assert 0, "{!r} item not found in module:\n{}\nitems: {}".format( funcname, source, items )
[docs] def getitems(self, source): """Return all test items collected from the module. This writes the source to a python file and runs pytest's collection on the resulting module, returning all test items contained within. """ modcol = self.getmodulecol(source) return self.genitems([modcol])
[docs] def getmodulecol(self, source, configargs=(), withinit=False): """Return the module collection node for ``source``. This writes ``source`` to a file using :py:meth:`makepyfile` and then runs the pytest collection on it, returning the collection node for the test module. :param source: the source code of the module to collect :param configargs: any extra arguments to pass to :py:meth:`parseconfigure` :param withinit: whether to also write an ```` file to the same directory to ensure it is a package """ if isinstance(source, Path): path = self.tmpdir.join(str(source)) assert not withinit, "not supported for paths" else: kw = {self.request.function.__name__: Source(source).strip()} path = self.makepyfile(**kw) if withinit: self.makepyfile(__init__="#") self.config = config = self.parseconfigure(path, *configargs) return self.getnode(config, path)
[docs] def collect_by_name(self, modcol, name): """Return the collection node for name from the module collection. This will search a module collection node for a collection node matching the given name. :param modcol: a module collection node; see :py:meth:`getmodulecol` :param name: the name of the node to return """ if modcol not in self._mod_collections: self._mod_collections[modcol] = list(modcol.collect()) for colitem in self._mod_collections[modcol]: if == name: return colitem
[docs] def popen( self, cmdargs, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=CLOSE_STDIN, **kw ): """Invoke subprocess.Popen. This calls subprocess.Popen making sure the current working directory is in the PYTHONPATH. You probably want to use :py:meth:`run` instead. """ env = os.environ.copy() env["PYTHONPATH"] = os.pathsep.join( filter(None, [os.getcwd(), env.get("PYTHONPATH", "")]) ) env.update(self._env_run_update) kw["env"] = env if stdin is Testdir.CLOSE_STDIN: kw["stdin"] = subprocess.PIPE elif isinstance(stdin, bytes): kw["stdin"] = subprocess.PIPE else: kw["stdin"] = stdin popen = subprocess.Popen(cmdargs, stdout=stdout, stderr=stderr, **kw) if stdin is Testdir.CLOSE_STDIN: popen.stdin.close() elif isinstance(stdin, bytes): popen.stdin.write(stdin) return popen
[docs] def run(self, *cmdargs, timeout=None, stdin=CLOSE_STDIN): """Run a command with arguments. Run a process using subprocess.Popen saving the stdout and stderr. :param args: the sequence of arguments to pass to `subprocess.Popen()` :kwarg timeout: the period in seconds after which to timeout and raise :py:class:`Testdir.TimeoutExpired` :kwarg stdin: optional standard input. Bytes are being send, closing the pipe, otherwise it is passed through to ``popen``. Defaults to ``CLOSE_STDIN``, which translates to using a pipe (``subprocess.PIPE``) that gets closed. Returns a :py:class:`RunResult`. """ __tracebackhide__ = True cmdargs = [ str(arg) if isinstance(arg, py.path.local) else arg for arg in cmdargs ] p1 = self.tmpdir.join("stdout") p2 = self.tmpdir.join("stderr") print("running:", *cmdargs) print(" in:", py.path.local()) f1 = open(str(p1), "w", encoding="utf8") f2 = open(str(p2), "w", encoding="utf8") try: now = time.time() popen = self.popen( cmdargs, stdin=stdin, stdout=f1, stderr=f2, close_fds=(sys.platform != "win32"), ) if isinstance(stdin, bytes): popen.stdin.close() def handle_timeout(): __tracebackhide__ = True timeout_message = ( "{seconds} second timeout expired running:" " {command}".format(seconds=timeout, command=cmdargs) ) popen.kill() popen.wait() raise self.TimeoutExpired(timeout_message) if timeout is None: ret = popen.wait() else: try: ret = popen.wait(timeout) except subprocess.TimeoutExpired: handle_timeout() finally: f1.close() f2.close() f1 = open(str(p1), "r", encoding="utf8") f2 = open(str(p2), "r", encoding="utf8") try: out = err = finally: f1.close() f2.close() self._dump_lines(out, sys.stdout) self._dump_lines(err, sys.stderr) return RunResult(ret, out, err, time.time() - now)
def _dump_lines(self, lines, fp): try: for line in lines: print(line, file=fp) except UnicodeEncodeError: print("couldn't print to {} because of encoding".format(fp)) def _getpytestargs(self): return sys.executable, "-mpytest"
[docs] def runpython(self, script): """Run a python script using sys.executable as interpreter. Returns a :py:class:`RunResult`. """ return, script)
[docs] def runpython_c(self, command): """Run python -c "command", return a :py:class:`RunResult`.""" return, "-c", command)
[docs] def runpytest_subprocess(self, *args, timeout=None): """Run pytest as a subprocess with given arguments. Any plugins added to the :py:attr:`plugins` list will be added using the ``-p`` command line option. Additionally ``--basetemp`` is used to put any temporary files and directories in a numbered directory prefixed with "runpytest-" to not conflict with the normal numbered pytest location for temporary files and directories. :param args: the sequence of arguments to pass to the pytest subprocess :param timeout: the period in seconds after which to timeout and raise :py:class:`Testdir.TimeoutExpired` Returns a :py:class:`RunResult`. """ __tracebackhide__ = True p = py.path.local.make_numbered_dir( prefix="runpytest-", keep=None, rootdir=self.tmpdir ) args = ("--basetemp=%s" % p,) + args plugins = [x for x in self.plugins if isinstance(x, str)] if plugins: args = ("-p", plugins[0]) + args args = self._getpytestargs() + args return*args, timeout=timeout)
[docs] def spawn_pytest(self, string, expect_timeout=10.0): """Run pytest using pexpect. This makes sure to use the right pytest and sets up the temporary directory locations. The pexpect child is returned. """ basetemp = self.tmpdir.mkdir("temp-pexpect") invoke = " ".join(map(str, self._getpytestargs())) cmd = "{} --basetemp={} {}".format(invoke, basetemp, string) return self.spawn(cmd, expect_timeout=expect_timeout)
[docs] def spawn(self, cmd, expect_timeout=10.0): """Run a command using pexpect. The pexpect child is returned. """ pexpect = pytest.importorskip("pexpect", "3.0") if hasattr(sys, "pypy_version_info") and "64" in platform.machine(): pytest.skip("pypy-64 bit not supported") if sys.platform.startswith("freebsd"): pytest.xfail("pexpect does not work reliably on freebsd") if not hasattr(pexpect, "spawn"): pytest.skip("pexpect.spawn not available") logfile = self.tmpdir.join("spawn.out").open("wb") # Do not load user config. env = os.environ.copy() env.update(self._env_run_update) child = pexpect.spawn(cmd, logfile=logfile, env=env) self.request.addfinalizer(logfile.close) child.timeout = expect_timeout return child
def getdecoded(out): try: return out.decode("utf-8") except UnicodeDecodeError: return "INTERNAL not-utf8-decodeable, truncated string:\n{}".format( saferepr(out) ) class LineComp: def __init__(self): self.stringio = def assert_contains_lines(self, lines2): """Assert that lines2 are contained (linearly) in lines1. Return a list of extralines found. """ __tracebackhide__ = True val = self.stringio.getvalue() self.stringio.truncate(0) lines1 = val.split("\n") return LineMatcher(lines1).fnmatch_lines(lines2)
[docs]class LineMatcher: """Flexible matching of text. This is a convenience class to test large texts like the output of commands. The constructor takes a list of lines without their trailing newlines, i.e. ``text.splitlines()``. """ def __init__(self, lines): self.lines = lines self._log_output = []
[docs] def str(self): """Return the entire original text.""" return "\n".join(self.lines)
def _getlines(self, lines2): if isinstance(lines2, str): lines2 = Source(lines2) if isinstance(lines2, Source): lines2 = lines2.strip().lines return lines2
[docs] def fnmatch_lines_random(self, lines2): """Check lines exist in the output using in any order. Lines are checked using ``fnmatch.fnmatch``. The argument is a list of lines which have to occur in the output, in any order. """ self._match_lines_random(lines2, fnmatch)
[docs] def re_match_lines_random(self, lines2): """Check lines exist in the output using ``re.match``, in any order. The argument is a list of lines which have to occur in the output, in any order. """ self._match_lines_random(lines2, lambda name, pat: re.match(pat, name))
def _match_lines_random(self, lines2, match_func): """Check lines exist in the output. The argument is a list of lines which have to occur in the output, in any order. Each line can contain glob whildcards. """ lines2 = self._getlines(lines2) for line in lines2: for x in self.lines: if line == x or match_func(x, line): self._log("matched: ", repr(line)) break else: self._log("line %r not found in output" % line) raise ValueError(self._log_text)
[docs] def get_lines_after(self, fnline): """Return all lines following the given line in the text. The given line can contain glob wildcards. """ for i, line in enumerate(self.lines): if fnline == line or fnmatch(line, fnline): return self.lines[i + 1 :] raise ValueError("line %r not found in output" % fnline)
def _log(self, *args): self._log_output.append(" ".join(str(x) for x in args)) @property def _log_text(self): return "\n".join(self._log_output)
[docs] def fnmatch_lines(self, lines2): """Search captured text for matching lines using ``fnmatch.fnmatch``. The argument is a list of lines which have to match and can use glob wildcards. If they do not match a is called. The matches and non-matches are also printed on stdout. """ __tracebackhide__ = True self._match_lines(lines2, fnmatch, "fnmatch")
[docs] def re_match_lines(self, lines2): """Search captured text for matching lines using ``re.match``. The argument is a list of lines which have to match using ``re.match``. If they do not match a is called. The matches and non-matches are also printed on stdout. """ __tracebackhide__ = True self._match_lines(lines2, lambda name, pat: re.match(pat, name), "re.match")
def _match_lines(self, lines2, match_func, match_nickname): """Underlying implementation of ``fnmatch_lines`` and ``re_match_lines``. :param list[str] lines2: list of string patterns to match. The actual format depends on ``match_func`` :param match_func: a callable ``match_func(line, pattern)`` where line is the captured line from stdout/stderr and pattern is the matching pattern :param str match_nickname: the nickname for the match function that will be logged to stdout when a match occurs """ assert isinstance(lines2, Sequence) lines2 = self._getlines(lines2) lines1 = self.lines[:] nextline = None extralines = [] __tracebackhide__ = True for line in lines2: nomatchprinted = False while lines1: nextline = lines1.pop(0) if line == nextline: self._log("exact match:", repr(line)) break elif match_func(nextline, line): self._log("%s:" % match_nickname, repr(line)) self._log(" with:", repr(nextline)) break else: if not nomatchprinted: self._log("nomatch:", repr(line)) nomatchprinted = True self._log(" and:", repr(nextline)) extralines.append(nextline) else: self._log("remains unmatched: {!r}".format(line))