blob: faed7f581c9d025dd03da3f8d8e0486a6e48be8f [file] [log] [blame]
""" (disabled by default) support for testing pytest and pytest plugins. """
import codecs
import gc
import os
import platform
import re
import subprocess
import sys
import time
import traceback
from fnmatch import fnmatch
from py.builtin import print_
from _pytest._code import Source
import py
import pytest
from _pytest.main import Session, EXIT_OK
def pytest_addoption(parser):
# group = parser.getgroup("pytester", "pytester (self-tests) options")
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"))
def pytest_configure(config):
# This might be called multiple times. Only take the first.
global _pytest_fullpath
except NameError:
_pytest_fullpath = os.path.abspath(pytest.__file__.rstrip("oc"))
_pytest_fullpath = _pytest_fullpath.replace("$py.class", ".py")
if config.getvalue("lsof"):
checker = LsofFdLeakChecker()
if checker.matching_platform():
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()
return py.process.cmdexec("lsof -Ffn0 -p %d" % pid)
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.startswith('/'):
open_files.append((fd, filename))
return open_files
def matching_platform(self):
py.process.cmdexec("lsof -v")
except (py.process.cmdexec.Error, UnicodeDecodeError):
# cmdexec may raise UnicodeDecodeError on Windows systems
# with locale other than english:
return False
return True
@pytest.hookimpl(hookwrapper=True, tryfirst=True)
def pytest_runtest_item(self, item):
lines1 = self.get_open_files()
if hasattr(sys, "pypy_version_info"):
lines2 = self.get_open_files()
new_fds = set([t[0] for t in lines2]) - set([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)"\n".join(error), pytrace=False)
# XXX copied from execnet's - needs to be merged
winpymap = {
'python2.7': r'C:\Python27\python.exe',
'python2.6': r'C:\Python26\python.exe',
'python3.1': r'C:\Python31\python.exe',
'python3.2': r'C:\Python32\python.exe',
'python3.3': r'C:\Python33\python.exe',
'python3.4': r'C:\Python34\python.exe',
'python3.5': r'C:\Python35\python.exe',
def getexecutable(name, cache={}):
return cache[name]
except KeyError:
executable = py.path.local.sysfind(name)
if executable:
if name == "jython":
import subprocess
popen = subprocess.Popen([str(executable), "--version"],
universal_newlines=True, stderr=subprocess.PIPE)
out, err = popen.communicate()
if not err or "2.5" not in err:
executable = None
if "2.5.2" in err:
executable = None #
cache[name] = executable
return executable
@pytest.fixture(params=['python2.6', 'python2.7', 'python3.3', "python3.4",
'pypy', 'pypy3'])
def anypython(request):
name = request.param
executable = getexecutable(name)
if executable is None:
if sys.platform == "win32":
executable = winpymap.get(name, None)
if executable:
executable = py.path.local(executable)
if executable.check():
return executable
pytest.skip("no suitable %s found" % (name,))
return executable
# 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 hooks.
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(l):
"""Only return names from iterator l without a leading underscore."""
return [x for x in l 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)>" %(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)
else:"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" % str(x) for x in self.calls])"\n".join(lines))
def getcall(self, name):
l = self.getcalls(name)
assert len(l) == 1, (name, l)
return l[0]
# functionality for test reports
def getreports(self,
names="pytest_runtest_logreport pytest_collectreport"):
return [ 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 """
l = []
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
except AttributeError:
if when and getattr(rep, 'when', None) != when:
if not inamepart or inamepart in rep.nodeid.split("::"):
if not l:
raise ValueError("could not find test report matching %r: "
"no test reports at all!" % (inamepart,))
if len(l) > 1:
raise ValueError(
"found 2 or more testreports matching %r: %s" %(inamepart, l))
return l[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 getattr(rep, "when", None) == "call":
elif rep.skipped:
elif rep.failed:
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 pytest_funcarg__LineMatcher(request):
return LineMatcher
def testdir(request, tmpdir_factory):
return Testdir(request, tmpdir_factory)
rex_outcome = re.compile("(\d+) ([\w-]+)")
class RunResult:
"""The result of running a command.
: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.
:stderrr: :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 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
def assert_outcomes(self, passed=0, skipped=0, failed=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()
assert passed == d.get("passed", 0)
assert skipped == d.get("skipped", 0)
assert failed == d.get("failed", 0)
class Testdir:
"""Temporary test directory with tools to test/run py.test itself.
This is based on the ``tmpdir`` fixture but provides a number of
methods which aid with testing py.test itself. Unless
:py:meth:`chdir` is used all methods will use :py:attr:`tmpdir` as
current working directory.
:tmpdir: The :py:class:`py.path.local` instance of the temporary
: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 depend on the method which uses them so refer to them
for details.
def __init__(self, request, tmpdir_factory):
self.request = request
# XXX remove duplication with tmpdir plugin
basetmp = tmpdir_factory.ensuretemp("testdir")
name = request.function.__name__
for i in range(100):
tmpdir = basetmp.mkdir(name + str(i))
except py.error.EEXIST:
self.tmpdir = tmpdir
self.plugins = []
self._savesyspath = (list(sys.path), list(sys.meta_path))
self._savemodulekeys = set(sys.modules)
self.chdir() # always chdir
method = self.request.config.getoption("--runpytest")
if method == "inprocess":
self._runpytest_method = self.runpytest_inprocess
elif method == "subprocess":
self._runpytest_method = self.runpytest_subprocess
def __repr__(self):
return "<Testdir %r>" % (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.
sys.path[:], sys.meta_path[:] = self._savesyspath
if hasattr(self, '_olddir'):
def delete_loaded_modules(self):
"""Delete modules that have been loaded during a test.
This allows the interpreter to catch module changes in case
the module is re-imported.
for name in set(sys.modules).difference(self._savemodulekeys):
# it seems zope.interfaces is keeping some state
# (used by twisted related tests)
if name != "zope.interface":
del sys.modules[name]
def make_hook_recorder(self, pluginmanager):
"""Create a new :py:class:`HookRecorder` for a PluginManager."""
assert not hasattr(pluginmanager, "reprec")
pluginmanager.reprec = reprec = HookRecorder(pluginmanager)
return reprec
def chdir(self):
"""Cd into the temporary directory.
This is done automatically upon instantiation.
old = self.tmpdir.chdir()
if not hasattr(self, '_olddir'):
self._olddir = old
def _makefile(self, ext, args, kwargs):
items = list(kwargs.items())
if args:
source = py.builtin._totext("\n").join(
map(py.builtin._totext, args)) + py.builtin._totext("\n")
basename = self.request.function.__name__
items.insert(0, (basename, source))
ret = None
for name, value in items:
p = self.tmpdir.join(name).new(ext=ext)
source = Source(value)
def my_totext(s, encoding="utf-8"):
if py.builtin._isbytes(s):
s = py.builtin._totext(s, encoding=encoding)
return s
source_unicode = "\n".join([my_totext(line) for line in source.lines])
source = py.builtin._totext(source_unicode)
content = source.strip().encode("utf-8") # + "\n"
#content = content.rstrip() + "\n"
p.write(content, "wb")
if ret is None:
ret = p
return ret
def makefile(self, ext, *args, **kwargs):
"""Create a new file in the testdir.
ext: The extension the file should use, including the dot.
E.g. ".py".
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.
E.g. "testdir.makefile('.txt', 'line1', 'line2')"
kwargs: Each keyword is the name of a file, while the value of
it will be written as contents of the file.
E.g. "testdir.makefile('.ini', pytest='[pytest]\naddopts=-rs\n')"
return self._makefile(ext, args, kwargs)
def makeconftest(self, source):
"""Write a 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 after the test.
if path is None:
path = self.tmpdir
sys.path.insert(0, str(path))
# a call to syspathinsert() usually means that the caller
# wants to import some dynamically created files.
# with python3 we thus invalidate import caches.
def _possibly_invalidate_import_caches(self):
# invalidate caches if we can (py33 and above)
import importlib
except ImportError:
if hasattr(importlib, "invalidate_caches"):
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)direcotry with an empty ````
file so that is recognised as a python package.
p = self.mkdir(name)
return p
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)
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) py.test
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)
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:
return result
def runitem(self, source):
"""Run the "test_func" Item.
The calling test instance (the class which contains the test
method) must provide a ``.getrunner()`` method which should
return a runner which can run the test protocol for a single
item, like 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)
l = list(cmdlineargs) + [p]
return self.inline_run(*l)
def inline_genitems(self, *args):
"""Run ``pytest.main(['--collectonly'])`` in-process.
Retuns a tuple of the collected items and a
:py:class:`HookRecorder` instance.
This runs the :py:func:`pytest.main` function to run all of
py.test inside the test process itself like
:py:meth:`inline_run`. However the return value is a tuple of
the collection 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.
This runs the :py:func:`pytest.main` function to run all of
py.test inside the test process itself. This means it can
return a :py:class:`HookRecorder` instance which gives more
detailed results from then run then can be done by matching
stdout/stderr from :py:meth:`runpytest`.
:param args: Any command line arguments to pass to
:param plugin: (keyword-only) Extra plugin instances the
``pytest.main()`` instance should use.
:return: A :py:class:`HookRecorder` instance.
rec = []
class Collect:
def pytest_configure(x, config):
plugins = kwargs.get("plugins") or []
ret = pytest.main(list(args), plugins=plugins)
if len(rec) == 1:
reprec = rec.pop()
class reprec:
reprec.ret = ret
# typically we reraise keyboard interrupts from the child run
# because it's our user requesting interruption of the testing
if ret == 2 and not kwargs.get("no_reraise_ctrlc"):
calls = reprec.getcalls("pytest_keyboard_interrupt")
if calls and calls[-1].excinfo.type == KeyboardInterrupt:
raise KeyboardInterrupt()
return reprec
def runpytest_inprocess(self, *args, **kwargs):
""" Return result of running pytest in-process, providing a similar
interface to what self.runpytest() provides. """
if kwargs.get("syspathinsert"):
now = time.time()
capture =
reprec = self.inline_run(*args, **kwargs)
except SystemExit as e:
class reprec:
ret = e.args[0]
except Exception:
class reprec:
ret = 3
out, err = capture.reset()
res = RunResult(reprec.ret,
out.split("\n"), err.split("\n"),
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 = [str(x) for x in args]
for x in args:
if str(x).startswith('--basetemp'):
#print ("basedtemp exists: %s" %(args,))
args.append("--basetemp=%s" % self.tmpdir.dirpath('basetemp'))
#print ("added basetemp: %s" %(args,))
return args
def parseconfig(self, *args):
"""Return a new py.test Config instance from given commandline args.
This invokes the py.test bootstrapping code in _pytest.config
to create a new :py:class:`_pytest.core.PluginManager` and
call the pytest_cmdline_parse hook to create new
:py:class:`_pytest.config.Config` instance.
If :py:attr:`plugins` has been populated they should be plugin
modules which will 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)
return config
def parseconfigure(self, *args):
"""Return a new py.test 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)
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 py.test'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 the
Item must be returned.
items = self.getitems(source)
for item in items:
if == 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 py.test'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 py.test 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
:param withinit: Whether to also write a ```` file
to the temporarly directory to ensure it is a package.
kw = {self.request.function.__name__: Source(source).strip()}
path = self.makepyfile(**kw)
if withinit:
self.makepyfile(__init__ = "#")
self.config = config = self.parseconfigure(path, *configargs)
node = self.getnode(config, path)
return node
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
:param name: The name of the node to return.
for colitem in modcol._memocollect():
if == name:
return colitem
def popen(self, cmdargs, stdout, stderr, **kw):
"""Invoke subprocess.Popen.
This calls subprocess.Popen making sure the current working
directory is the PYTHONPATH.
You probably want to use :py:meth:`run` instead.
env = os.environ.copy()
env['PYTHONPATH'] = os.pathsep.join(filter(None, [
str(os.getcwd()), env.get('PYTHONPATH', '')]))
kw['env'] = env
return subprocess.Popen(cmdargs,
stdout=stdout, stderr=stderr, **kw)
def run(self, *cmdargs):
"""Run a command with arguments.
Run a process using subprocess.Popen saving the stdout and
Returns a :py:class:`RunResult`.
return self._run(*cmdargs)
def _run(self, *cmdargs):
cmdargs = [str(x) for x in cmdargs]
p1 = self.tmpdir.join("stdout")
p2 = self.tmpdir.join("stderr")
print_("running:", ' '.join(cmdargs))
print_(" in:", str(py.path.local()))
f1 =, "w", encoding="utf8")
f2 =, "w", encoding="utf8")
now = time.time()
popen = self.popen(cmdargs, stdout=f1, stderr=f2,
close_fds=(sys.platform != "win32"))
ret = popen.wait()
f1 =, "r", encoding="utf8")
f2 =, "r", encoding="utf8")
out =
err =
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):
for line in lines:
py.builtin.print_(line, file=fp)
except UnicodeEncodeError:
print("couldn't print to %s because of encoding" % (fp,))
def _getpytestargs(self):
# we cannot use "(sys.executable,script)"
# because on windows the script is e.g. a py.test.exe
return (sys.executable, _pytest_fullpath,) # noqa
def runpython(self, script):
"""Run a python script using sys.executable as interpreter.
Returns a :py:class:`RunResult`.
return, script)
def runpython_c(self, command):
"""Run python -c "command", return a :py:class:`RunResult`."""
return, "-c", command)
def runpytest_subprocess(self, *args, **kwargs):
"""Run py.test as a subprocess with given arguments.
Any plugins added to the :py:attr:`plugins` list will added
using the ``-p`` command line option. Addtionally
``--basetemp`` is used put any temporary files and directories
in a numbered directory prefixed with "runpytest-" so they do
not conflict with the normal numberd pytest location for
temporary files and directories.
Returns a :py:class:`RunResult`.
p = py.path.local.make_numbered_dir(prefix="runpytest-",
keep=None, rootdir=self.tmpdir)
args = ('--basetemp=%s' % p, ) + args
#for x in args:
# if '--confcutdir' in str(x):
# break
# pass
# args = ('--confcutdir=.',) + args
plugins = [x for x in self.plugins if isinstance(x, str)]
if plugins:
args = ('-p', plugins[0]) + args
args = self._getpytestargs() + args
def spawn_pytest(self, string, expect_timeout=10.0):
"""Run py.test using pexpect.
This makes sure to use the right py.test and sets up the
temporary directory locations.
The pexpect child is returned.
basetemp = self.tmpdir.mkdir("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 == "darwin":
pytest.xfail("pexpect does not work reliably on darwin?!")
if sys.platform.startswith("freebsd"):
pytest.xfail("pexpect does not work reliably on freebsd")
logfile = self.tmpdir.join("spawn.out").open("wb")
child = pexpect.spawn(cmd, logfile=logfile)
child.timeout = expect_timeout
return child
def getdecoded(out):
return out.decode("utf-8")
except UnicodeDecodeError:
return "INTERNAL not-utf8-decodeable, truncated string:\n%s" % (,)
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()
lines1 = val.split("\n")
return LineMatcher(lines1).fnmatch_lines(lines2)
class LineMatcher:
"""Flexible matching of text.
This is a convenience class to test large texts like the output of
The constructor takes a list of lines without their trailing
newlines, i.e. ``text.splitlines()``.
def __init__(self, lines):
self.lines = lines
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.
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 fnmatch(x, line):
print_("matched: ", repr(line))
raise ValueError("line %r not found in output" % line)
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 fnmatch_lines(self, lines2):
"""Search the text for matching lines.
The argument is a list of lines which have to match and can
use glob wildcards. If they do not match an is
called. The matches and non-matches are also printed on
def show(arg1, arg2):
py.builtin.print_(arg1, arg2, file=sys.stderr)
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:
show("exact match:", repr(line))
elif fnmatch(nextline, line):
show("fnmatch:", repr(line))
show(" with:", repr(nextline))
if not nomatchprinted:
show("nomatch:", repr(line))
nomatchprinted = True
show(" and:", repr(nextline))
else:"remains unmatched: %r, see stderr" % (line,))