# Source code for _pytest.pytester

    # -*- coding: utf-8 -*-
    """(disabled by default) support for testing pytest and pytest plugins."""
    from __future__ import absolute_import
    from __future__ import division
    from __future__ import print_function

    import codecs
    import gc
    import os
    import platform
    import re
    import subprocess
    import sys
    import time
    import traceback
    from fnmatch import fnmatch
    from weakref import WeakKeyDictionary

    import py
    import six

    import pytest
    from _pytest._code import Source
    from _pytest._io.saferepr import saferepr
    from _pytest.assertion.rewrite import AssertionRewritingHook
    from _pytest.capture import MultiCapture
    from _pytest.capture import SysCapture
    from _pytest.compat import safe_str
    from _pytest.compat import Sequence
    from _pytest.main import EXIT_INTERRUPTED
    from _pytest.main import EXIT_OK
    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
        u"/var/lib/sss/mc/passwd"
    ]

    def pytest_addoption(parser):
        parser.addoption(
            "--lsof",
            action="store_true",
            dest="lsof",
            default=False,
            help="run FD checks if lsof is available",
        )

        parser.addoption(
            "--runpytest",
            default="inprocess",
            dest="runpytest",
            choices=("inprocess", "subprocess"),
            help=(
                "run pytest sub runs in tests using an 'inprocess' "
                "or 'subprocess' (python -m main) method"
            ),
        )

        parser.addini(
            "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():
                config.pluginmanager.register(checker)

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

    def raise_on_kwargs(kwargs):
        __tracebackhide__ = True
        if kwargs:  # pragma: no branch
            raise TypeError(
                "Unexpected keyword arguments: {}".format(", ".join(sorted(kwargs)))
            )

    class LsofFdLeakChecker(object):
        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
                ).decode()

        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:
                        continue
                    if filename.startswith("/"):
                        open_files.append((fd, filename))

            return open_files

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

        @pytest.hookimpl(hookwrapper=True, tryfirst=True)
        def pytest_runtest_protocol(self, item):
            lines1 = self.get_open_files()
            yield
            if hasattr(sys, "pypy_version_info"):
                gc.collect()
            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(error[0])
                error.append("*** function %s:%s: %s " % item.location)
                error.append("See issue #2366")
                item.warn(pytest.PytestWarning("\n".join(error)))

    # used at least by pytest-xdist plugin

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

        """
        return PytestArg(request)

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

        def gethookrecorder(self, hook):
            hookrecorder = HookRecorder(hook._pm)
            self.request.addfinalizer(hookrecorder.finish_recording)
            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(object):
        def __init__(self, name, kwargs):
            self.__dict__.update(kwargs)
            self._name = name

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

    class HookRecorder(object):
        """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):
                pass

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

        def finish_recording(self):
            self._undo_wrapping()

        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)
                        else:
                            print("NOCHECKERMATCH", repr(check), "-", call)
                            continue
                        i += ind + 1
                        break
                    print("NONAMEMATCH", name, "with", call)
                else:
                    pytest.fail("could not find %r check %r" % (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:" % (name,)]
            lines.extend(["  %s" % x for x in self.calls])
            pytest.fail("\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 [x.report for x in self.getcalls(names)]

        def matchreport(
            self,
            inamepart="",
            names="pytest_runtest_logreport pytest_collectreport",
            when=None,
        ):
            """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
                    continue
                if when and rep.when != when:
                    continue
                if not inamepart or inamepart in rep.nodeid.split("::"):
                    values.append(rep)
            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: %s" % (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":
                        passed.append(rep)
                elif rep.skipped:
                    skipped.append(rep)
                else:
                    assert rep.failed, "Unexpected outcome: {!r}".format(rep)
                    failed.append(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[:] = []

    @pytest.fixture
    def linecomp(request):
        return LineComp()

    @pytest.fixture(name="LineMatcher")
    def LineMatcher_fixture(request):
        return LineMatcher

    @pytest.fixture
    def testdir(request, tmpdir_factory):
        return Testdir(request, tmpdir_factory)

    @pytest.fixture
    def _sys_snapshot():
        snappaths = SysPathsSnapshot()
        snapmods = SysModulesSnapshot()
        yield
        snapmods.restore()
        snappaths.restore()

    @pytest.fixture
    def _config_for_test():
        from _pytest.config import get_config

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

    rex_outcome = re.compile(r"(\d+) ([\w-]+)")

    class RunResult(object):
        """The result of running a command.

        Attributes:

        :ret: the return value
        :outlines: list of lines captured from stdout
        :errlines: list of lines captures from stderr
        :stdout: :py:class:`LineMatcher` of stdout, use ``stdout.str()`` to
           reconstruct stdout or the commonly used ``stdout.fnmatch_lines()``
           method
        :stderr: :py:class:`LineMatcher` of stderr
        :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)
            )

        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 "seconds" in line:
                    outcomes = rex_outcome.findall(line)
                    if outcomes:
                        d = {}
                        for num, cat in outcomes:
                            d[cat] = int(num)
                        return d
            raise ValueError("Pytest terminal report not found")

        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(object):
        def __init__(self):
            self.__saved = os.getcwd()

        def restore(self):
            os.chdir(self.__saved)

    class SysModulesSnapshot(object):
        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(object):
        def __init__(self):
            self.__saved = list(sys.path), list(sys.meta_path)

        def restore(self):
            sys.path[:], sys.meta_path[:] = self.__saved

    class Testdir(object):
        """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:

        :tmpdir: The :py:class:`py.path.local` instance of the temporary directory.

        :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

        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>" % (self.tmpdir,)

        def __str__(self):
            return str(self.tmpdir)

        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)

        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

        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 six.text_type(s)

            if args:
                source = u"\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 = u"\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

        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)

        def makeconftest(self, source):
            """Write a contest.py file with 'source' as contents."""
            return self.makepyfile(conftest=source)

        def makeini(self, source):
            """Write a tox.ini file with 'source' as contents."""
            return self.makefile(".ini", tox=source)

        def getinicfg(self, source):
            """Return the pytest section from the tox.ini config file."""
            p = self.makeini(source)
            return py.iniconfig.IniConfig(p)["pytest"]

        def makepyfile(self, *args, **kwargs):
            """Shortcut for .makefile() with a .py extension."""
            return self._makefile(".py", args, kwargs)

        def maketxtfile(self, *args, **kwargs):
            """Shortcut for .makefile() with a .txt extension."""
            return self._makefile(".txt", args, kwargs)

        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))

        def mkdir(self, name):
            """Create a new (sub)directory."""
            return self.tmpdir.mkdir(name)

        def mkpydir(self, name):
            """Create a new python package.

            This creates a (sub)directory with an empty ``__init__.py`` file so it
            gets recognised as a python package.

            """
            p = self.mkdir(name)
            p.ensure("__init__.py")
            return p

        def copy_example(self, name=None):
            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("__init__.py").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

        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=EXIT_OK)
            return res

        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=EXIT_OK)
            return res

        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

        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)

        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)

        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

        def inline_run(self, *args, **kwargs):
            """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`

            :param plugins: (keyword-only) extra plugin instances the
               ``pytest.main()`` instance should use

            :return: a :py:class:`HookRecorder` instance
            """
            plugins = kwargs.pop("plugins", [])
            no_reraise_ctrlc = kwargs.pop("no_reraise_ctrlc", None)
            raise_on_kwargs(kwargs)

            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)

                # When running pytest inline any plugins active in the main test
                # process are already imported.  So this disables the warning which
                # will trigger to say they can no longer be rewritten, which is
                # fine as they have already been rewritten.
                orig_warn = AssertionRewritingHook._warn_already_imported

                def revert_warn_already_imported():
                    AssertionRewritingHook._warn_already_imported = orig_warn

                finalizers.append(revert_warn_already_imported)
                AssertionRewritingHook._warn_already_imported = lambda *a: None

                # 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(object):
                    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(object):
                        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 == EXIT_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()

        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(object):
                        ret = e.args[0]

                except Exception:
                    traceback.print_exc()

                    class reprec(object):
                        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

        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 safe_str(x).startswith("--basetemp"):
                    break
            else:
                args.append("--basetemp=%s" % self.tmpdir.dirpath("basetemp"))
            return args

        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

        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

        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 item.name == funcname:
                    return item
            assert 0, "%r item not found in module:\n%s\nitems: %s" % (
                funcname,
                source,
                items,
            )

        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])

        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 ``__init__.py`` 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)

        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 colitem.name == name:
                    return colitem

        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

        def run(self, *cmdargs, **kwargs):
            """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()`
            :param timeout: the period in seconds after which to timeout and raise
                :py:class:`Testdir.TimeoutExpired`
            :param 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

            timeout = kwargs.pop("timeout", None)
            stdin = kwargs.pop("stdin", Testdir.CLOSE_STDIN)
            raise_on_kwargs(kwargs)

            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 = codecs.open(str(p1), "w", encoding="utf8")
            f2 = codecs.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()
                elif not six.PY2:
                    try:
                        ret = popen.wait(timeout)
                    except subprocess.TimeoutExpired:
                        handle_timeout()
                else:
                    end = time.time() + timeout

                    resolution = min(0.1, timeout / 10)

                    while True:
                        ret = popen.poll()
                        if ret is not None:
                            break

                        if time.time() > end:
                            handle_timeout()

                        time.sleep(resolution)
            finally:
                f1.close()
                f2.close()
            f1 = codecs.open(str(p1), "r", encoding="utf8")
            f2 = codecs.open(str(p2), "r", encoding="utf8")
            try:
                out = f1.read().splitlines()
                err = f2.read().splitlines()
            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 %s because of encoding" % (fp,))

        def _getpytestargs(self):
            return sys.executable, "-mpytest"

        def runpython(self, script):
            """Run a python script using sys.executable as interpreter.

            Returns a :py:class:`RunResult`.

            """
            return self.run(sys.executable, script)

        def runpython_c(self, command):
            """Run python -c "command", return a :py:class:`RunResult`."""
            return self.run(sys.executable, "-c", command)

        def runpytest_subprocess(self, *args, **kwargs):
            """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
            timeout = kwargs.pop("timeout", None)
            raise_on_kwargs(kwargs)

            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 self.run(*args, timeout=timeout)

        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 = "%s --basetemp=%s %s" % (invoke, basetemp, string)
            return self.spawn(cmd, expect_timeout=expect_timeout)

        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")
            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%s" % (saferepr(out),)

    class LineComp(object):
        def __init__(self):
            self.stringio = py.io.TextIO()

        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)
            self.stringio.seek(0)
            lines1 = val.split("\n")
            return LineMatcher(lines1).fnmatch_lines(lines2)

    class LineMatcher(object):
        """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 = []

        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

        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)

        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)

        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)

        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 pytest.fail() is called.  The
            matches and non-matches are also printed on stdout.

            """
            __tracebackhide__ = True
            self._match_lines(lines2, fnmatch, "fnmatch")

        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 pytest.fail() 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" % (line,))
                    pytest.fail(self._log_text)