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""" core implementation of testing process: init, session, runtest loop. """ 

from __future__ import absolute_import 

from __future__ import division 

from __future__ import print_function 

 

import contextlib 

import functools 

import os 

import pkgutil 

import sys 

import warnings 

 

import attr 

import py 

import six 

 

import _pytest._code 

from _pytest import nodes 

from _pytest.config import directory_arg 

from _pytest.config import hookimpl 

from _pytest.config import UsageError 

from _pytest.deprecated import PYTEST_CONFIG_GLOBAL 

from _pytest.outcomes import exit 

from _pytest.runner import collect_one_node 

 

 

# exitcodes for the command line 

EXIT_OK = 0 

EXIT_TESTSFAILED = 1 

EXIT_INTERRUPTED = 2 

EXIT_INTERNALERROR = 3 

EXIT_USAGEERROR = 4 

EXIT_NOTESTSCOLLECTED = 5 

 

 

def pytest_addoption(parser): 

parser.addini( 

"norecursedirs", 

"directory patterns to avoid for recursion", 

type="args", 

default=[".*", "build", "dist", "CVS", "_darcs", "{arch}", "*.egg", "venv"], 

) 

parser.addini( 

"testpaths", 

"directories to search for tests when no files or directories are given in the " 

"command line.", 

type="args", 

default=[], 

) 

# parser.addini("dirpatterns", 

# "patterns specifying possible locations of test files", 

# type="linelist", default=["**/test_*.txt", 

# "**/test_*.py", "**/*_test.py"] 

# ) 

group = parser.getgroup("general", "running and selection options") 

group._addoption( 

"-x", 

"--exitfirst", 

action="store_const", 

dest="maxfail", 

const=1, 

help="exit instantly on first error or failed test.", 

), 

group._addoption( 

"--maxfail", 

metavar="num", 

action="store", 

type=int, 

dest="maxfail", 

default=0, 

help="exit after first num failures or errors.", 

) 

group._addoption( 

"--strict", 

action="store_true", 

help="marks not registered in configuration file raise errors.", 

) 

group._addoption( 

"-c", 

metavar="file", 

type=str, 

dest="inifilename", 

help="load configuration from `file` instead of trying to locate one of the implicit " 

"configuration files.", 

) 

group._addoption( 

"--continue-on-collection-errors", 

action="store_true", 

default=False, 

dest="continue_on_collection_errors", 

help="Force test execution even if collection errors occur.", 

) 

group._addoption( 

"--rootdir", 

action="store", 

dest="rootdir", 

help="Define root directory for tests. Can be relative path: 'root_dir', './root_dir', " 

"'root_dir/another_dir/'; absolute path: '/home/user/root_dir'; path with variables: " 

"'$HOME/root_dir'.", 

) 

 

group = parser.getgroup("collect", "collection") 

group.addoption( 

"--collectonly", 

"--collect-only", 

action="store_true", 

help="only collect tests, don't execute them.", 

), 

group.addoption( 

"--pyargs", 

action="store_true", 

help="try to interpret all arguments as python packages.", 

) 

group.addoption( 

"--ignore", 

action="append", 

metavar="path", 

help="ignore path during collection (multi-allowed).", 

) 

group.addoption( 

"--deselect", 

action="append", 

metavar="nodeid_prefix", 

help="deselect item during collection (multi-allowed).", 

) 

# when changing this to --conf-cut-dir, config.py Conftest.setinitial 

# needs upgrading as well 

group.addoption( 

"--confcutdir", 

dest="confcutdir", 

default=None, 

metavar="dir", 

type=functools.partial(directory_arg, optname="--confcutdir"), 

help="only load conftest.py's relative to specified dir.", 

) 

group.addoption( 

"--noconftest", 

action="store_true", 

dest="noconftest", 

default=False, 

help="Don't load any conftest.py files.", 

) 

group.addoption( 

"--keepduplicates", 

"--keep-duplicates", 

action="store_true", 

dest="keepduplicates", 

default=False, 

help="Keep duplicate tests.", 

) 

group.addoption( 

"--collect-in-virtualenv", 

action="store_true", 

dest="collect_in_virtualenv", 

default=False, 

help="Don't ignore tests in a local virtualenv directory", 

) 

 

group = parser.getgroup("debugconfig", "test session debugging and configuration") 

group.addoption( 

"--basetemp", 

dest="basetemp", 

default=None, 

metavar="dir", 

help=( 

"base temporary directory for this test run." 

"(warning: this directory is removed if it exists)" 

), 

) 

 

 

class _ConfigDeprecated(object): 

def __init__(self, config): 

self.__dict__["_config"] = config 

 

def __getattr__(self, attr): 

warnings.warn(PYTEST_CONFIG_GLOBAL, stacklevel=2) 

return getattr(self._config, attr) 

 

def __setattr__(self, attr, val): 

warnings.warn(PYTEST_CONFIG_GLOBAL, stacklevel=2) 

return setattr(self._config, attr, val) 

 

def __repr__(self): 

return "{}({!r})".format(type(self).__name__, self._config) 

 

 

def pytest_configure(config): 

__import__("pytest").config = _ConfigDeprecated(config) # compatibility 

 

 

def wrap_session(config, doit): 

"""Skeleton command line program""" 

session = Session(config) 

session.exitstatus = EXIT_OK 

initstate = 0 

try: 

try: 

config._do_configure() 

initstate = 1 

config.hook.pytest_sessionstart(session=session) 

initstate = 2 

session.exitstatus = doit(config, session) or 0 

except UsageError: 

raise 

except Failed: 

session.exitstatus = EXIT_TESTSFAILED 

except (KeyboardInterrupt, exit.Exception): 

excinfo = _pytest._code.ExceptionInfo.from_current() 

exitstatus = EXIT_INTERRUPTED 

if initstate <= 2 and isinstance(excinfo.value, exit.Exception): 

sys.stderr.write("{}: {}\n".format(excinfo.typename, excinfo.value.msg)) 

if excinfo.value.returncode is not None: 

exitstatus = excinfo.value.returncode 

config.hook.pytest_keyboard_interrupt(excinfo=excinfo) 

session.exitstatus = exitstatus 

except: # noqa 

excinfo = _pytest._code.ExceptionInfo.from_current() 

config.notify_exception(excinfo, config.option) 

session.exitstatus = EXIT_INTERNALERROR 

if excinfo.errisinstance(SystemExit): 

sys.stderr.write("mainloop: caught Spurious SystemExit!\n") 

 

finally: 

excinfo = None # Explicitly break reference cycle. 

session.startdir.chdir() 

if initstate >= 2: 

config.hook.pytest_sessionfinish( 

session=session, exitstatus=session.exitstatus 

) 

config._ensure_unconfigure() 

return session.exitstatus 

 

 

def pytest_cmdline_main(config): 

return wrap_session(config, _main) 

 

 

def _main(config, session): 

""" default command line protocol for initialization, session, 

running tests and reporting. """ 

config.hook.pytest_collection(session=session) 

config.hook.pytest_runtestloop(session=session) 

 

if session.testsfailed: 

return EXIT_TESTSFAILED 

elif session.testscollected == 0: 

return EXIT_NOTESTSCOLLECTED 

 

 

def pytest_collection(session): 

return session.perform_collect() 

 

 

def pytest_runtestloop(session): 

if session.testsfailed and not session.config.option.continue_on_collection_errors: 

raise session.Interrupted("%d errors during collection" % session.testsfailed) 

 

if session.config.option.collectonly: 

return True 

 

for i, item in enumerate(session.items): 

nextitem = session.items[i + 1] if i + 1 < len(session.items) else None 

item.config.hook.pytest_runtest_protocol(item=item, nextitem=nextitem) 

if session.shouldfail: 

raise session.Failed(session.shouldfail) 

if session.shouldstop: 

raise session.Interrupted(session.shouldstop) 

return True 

 

 

def _in_venv(path): 

"""Attempts to detect if ``path`` is the root of a Virtual Environment by 

checking for the existence of the appropriate activate script""" 

bindir = path.join("Scripts" if sys.platform.startswith("win") else "bin") 

if not bindir.isdir(): 

return False 

activates = ( 

"activate", 

"activate.csh", 

"activate.fish", 

"Activate", 

"Activate.bat", 

"Activate.ps1", 

) 

return any([fname.basename in activates for fname in bindir.listdir()]) 

 

 

def pytest_ignore_collect(path, config): 

ignore_paths = config._getconftest_pathlist("collect_ignore", path=path.dirpath()) 

ignore_paths = ignore_paths or [] 

excludeopt = config.getoption("ignore") 

if excludeopt: 

ignore_paths.extend([py.path.local(x) for x in excludeopt]) 

 

if py.path.local(path) in ignore_paths: 

return True 

 

allow_in_venv = config.getoption("collect_in_virtualenv") 

if not allow_in_venv and _in_venv(path): 

return True 

 

return False 

 

 

def pytest_collection_modifyitems(items, config): 

deselect_prefixes = tuple(config.getoption("deselect") or []) 

if not deselect_prefixes: 

return 

 

remaining = [] 

deselected = [] 

for colitem in items: 

if colitem.nodeid.startswith(deselect_prefixes): 

deselected.append(colitem) 

else: 

remaining.append(colitem) 

 

if deselected: 

config.hook.pytest_deselected(items=deselected) 

items[:] = remaining 

 

 

@contextlib.contextmanager 

def _patched_find_module(): 

"""Patch bug in pkgutil.ImpImporter.find_module 

 

When using pkgutil.find_loader on python<3.4 it removes symlinks 

from the path due to a call to os.path.realpath. This is not consistent 

with actually doing the import (in these versions, pkgutil and __import__ 

did not share the same underlying code). This can break conftest 

discovery for pytest where symlinks are involved. 

 

The only supported python<3.4 by pytest is python 2.7. 

""" 

if six.PY2: # python 3.4+ uses importlib instead 

 

def find_module_patched(self, fullname, path=None): 

# Note: we ignore 'path' argument since it is only used via meta_path 

subname = fullname.split(".")[-1] 

if subname != fullname and self.path is None: 

return None 

if self.path is None: 

path = None 

else: 

# original: path = [os.path.realpath(self.path)] 

path = [self.path] 

try: 

file, filename, etc = pkgutil.imp.find_module(subname, path) 

except ImportError: 

return None 

return pkgutil.ImpLoader(fullname, file, filename, etc) 

 

old_find_module = pkgutil.ImpImporter.find_module 

pkgutil.ImpImporter.find_module = find_module_patched 

try: 

yield 

finally: 

pkgutil.ImpImporter.find_module = old_find_module 

else: 

yield 

 

 

class FSHookProxy(object): 

def __init__(self, fspath, pm, remove_mods): 

self.fspath = fspath 

self.pm = pm 

self.remove_mods = remove_mods 

 

def __getattr__(self, name): 

x = self.pm.subset_hook_caller(name, remove_plugins=self.remove_mods) 

self.__dict__[name] = x 

return x 

 

 

class NoMatch(Exception): 

""" raised if matching cannot locate a matching names. """ 

 

 

class Interrupted(KeyboardInterrupt): 

""" signals an interrupted test run. """ 

 

__module__ = "builtins" # for py3 

 

 

class Failed(Exception): 

""" signals a stop as failed test run. """ 

 

 

@attr.s 

class _bestrelpath_cache(dict): 

path = attr.ib() 

 

def __missing__(self, path): 

r = self.path.bestrelpath(path) 

self[path] = r 

return r 

 

 

class Session(nodes.FSCollector): 

Interrupted = Interrupted 

Failed = Failed 

 

def __init__(self, config): 

nodes.FSCollector.__init__( 

self, config.rootdir, parent=None, config=config, session=self, nodeid="" 

) 

self.testsfailed = 0 

self.testscollected = 0 

self.shouldstop = False 

self.shouldfail = False 

self.trace = config.trace.root.get("collection") 

self._norecursepatterns = config.getini("norecursedirs") 

self.startdir = py.path.local() 

self._initialpaths = frozenset() 

# Keep track of any collected nodes in here, so we don't duplicate fixtures 

self._node_cache = {} 

self._bestrelpathcache = _bestrelpath_cache(config.rootdir) 

# Dirnames of pkgs with dunder-init files. 

self._pkg_roots = {} 

 

self.config.pluginmanager.register(self, name="session") 

 

def _node_location_to_relpath(self, node_path): 

# bestrelpath is a quite slow function 

return self._bestrelpathcache[node_path] 

 

@hookimpl(tryfirst=True) 

def pytest_collectstart(self): 

if self.shouldfail: 

raise self.Failed(self.shouldfail) 

if self.shouldstop: 

raise self.Interrupted(self.shouldstop) 

 

@hookimpl(tryfirst=True) 

def pytest_runtest_logreport(self, report): 

if report.failed and not hasattr(report, "wasxfail"): 

self.testsfailed += 1 

maxfail = self.config.getvalue("maxfail") 

if maxfail and self.testsfailed >= maxfail: 

self.shouldfail = "stopping after %d failures" % (self.testsfailed) 

 

pytest_collectreport = pytest_runtest_logreport 

 

def isinitpath(self, path): 

return path in self._initialpaths 

 

def gethookproxy(self, fspath): 

# check if we have the common case of running 

# hooks with all conftest.py files 

pm = self.config.pluginmanager 

my_conftestmodules = pm._getconftestmodules(fspath) 

remove_mods = pm._conftest_plugins.difference(my_conftestmodules) 

if remove_mods: 

# one or more conftests are not in use at this fspath 

proxy = FSHookProxy(fspath, pm, remove_mods) 

else: 

# all plugis are active for this fspath 

proxy = self.config.hook 

return proxy 

 

def perform_collect(self, args=None, genitems=True): 

hook = self.config.hook 

try: 

items = self._perform_collect(args, genitems) 

self.config.pluginmanager.check_pending() 

hook.pytest_collection_modifyitems( 

session=self, config=self.config, items=items 

) 

finally: 

hook.pytest_collection_finish(session=self) 

self.testscollected = len(items) 

return items 

 

def _perform_collect(self, args, genitems): 

if args is None: 

args = self.config.args 

self.trace("perform_collect", self, args) 

self.trace.root.indent += 1 

self._notfound = [] 

initialpaths = [] 

self._initialparts = [] 

self.items = items = [] 

for arg in args: 

parts = self._parsearg(arg) 

self._initialparts.append(parts) 

initialpaths.append(parts[0]) 

self._initialpaths = frozenset(initialpaths) 

rep = collect_one_node(self) 

self.ihook.pytest_collectreport(report=rep) 

self.trace.root.indent -= 1 

if self._notfound: 

errors = [] 

for arg, exc in self._notfound: 

line = "(no name %r in any of %r)" % (arg, exc.args[0]) 

errors.append("not found: %s\n%s" % (arg, line)) 

# XXX: test this 

raise UsageError(*errors) 

if not genitems: 

return rep.result 

else: 

if rep.passed: 

for node in rep.result: 

self.items.extend(self.genitems(node)) 

return items 

 

def collect(self): 

for initialpart in self._initialparts: 

arg = "::".join(map(str, initialpart)) 

self.trace("processing argument", arg) 

self.trace.root.indent += 1 

try: 

for x in self._collect(arg): 

yield x 

except NoMatch: 

# we are inside a make_report hook so 

# we cannot directly pass through the exception 

self._notfound.append((arg, sys.exc_info()[1])) 

 

self.trace.root.indent -= 1 

 

def _collect(self, arg): 

from _pytest.python import Package 

 

names = self._parsearg(arg) 

argpath = names.pop(0) 

 

# Start with a Session root, and delve to argpath item (dir or file) 

# and stack all Packages found on the way. 

# No point in finding packages when collecting doctests 

if not self.config.option.doctestmodules: 

pm = self.config.pluginmanager 

for parent in reversed(argpath.parts()): 

if pm._confcutdir and pm._confcutdir.relto(parent): 

break 

 

if parent.isdir(): 

pkginit = parent.join("__init__.py") 

if pkginit.isfile(): 

if pkginit not in self._node_cache: 

col = self._collectfile(pkginit, handle_dupes=False) 

if col: 

if isinstance(col[0], Package): 

self._pkg_roots[parent] = col[0] 

# always store a list in the cache, matchnodes expects it 

self._node_cache[col[0].fspath] = [col[0]] 

 

# If it's a directory argument, recurse and look for any Subpackages. 

# Let the Package collector deal with subnodes, don't collect here. 

if argpath.check(dir=1): 

assert not names, "invalid arg %r" % (arg,) 

 

seen_dirs = set() 

for path in argpath.visit( 

fil=self._visit_filter, rec=self._recurse, bf=True, sort=True 

): 

dirpath = path.dirpath() 

if dirpath not in seen_dirs: 

# Collect packages first. 

seen_dirs.add(dirpath) 

pkginit = dirpath.join("__init__.py") 

if pkginit.exists(): 

for x in self._collectfile(pkginit): 

yield x 

if isinstance(x, Package): 

self._pkg_roots[dirpath] = x 

if dirpath in self._pkg_roots: 

# Do not collect packages here. 

continue 

 

for x in self._collectfile(path): 

key = (type(x), x.fspath) 

if key in self._node_cache: 

yield self._node_cache[key] 

else: 

self._node_cache[key] = x 

yield x 

else: 

assert argpath.check(file=1) 

 

if argpath in self._node_cache: 

col = self._node_cache[argpath] 

else: 

collect_root = self._pkg_roots.get(argpath.dirname, self) 

col = collect_root._collectfile(argpath, handle_dupes=False) 

if col: 

self._node_cache[argpath] = col 

m = self.matchnodes(col, names) 

# If __init__.py was the only file requested, then the matched node will be 

# the corresponding Package, and the first yielded item will be the __init__ 

# Module itself, so just use that. If this special case isn't taken, then all 

# the files in the package will be yielded. 

if argpath.basename == "__init__.py": 

yield next(m[0].collect()) 

return 

for y in m: 

yield y 

 

def _collectfile(self, path, handle_dupes=True): 

assert path.isfile() 

ihook = self.gethookproxy(path) 

if not self.isinitpath(path): 

if ihook.pytest_ignore_collect(path=path, config=self.config): 

return () 

 

if handle_dupes: 

keepduplicates = self.config.getoption("keepduplicates") 

if not keepduplicates: 

duplicate_paths = self.config.pluginmanager._duplicatepaths 

if path in duplicate_paths: 

return () 

else: 

duplicate_paths.add(path) 

 

return ihook.pytest_collect_file(path=path, parent=self) 

 

def _recurse(self, dirpath): 

if dirpath.basename == "__pycache__": 

return False 

ihook = self.gethookproxy(dirpath.dirpath()) 

if ihook.pytest_ignore_collect(path=dirpath, config=self.config): 

return False 

for pat in self._norecursepatterns: 

if dirpath.check(fnmatch=pat): 

return False 

ihook = self.gethookproxy(dirpath) 

ihook.pytest_collect_directory(path=dirpath, parent=self) 

return True 

 

if six.PY2: 

 

@staticmethod 

def _visit_filter(f): 

return f.check(file=1) and not f.strpath.endswith("*.pyc") 

 

else: 

 

@staticmethod 

def _visit_filter(f): 

return f.check(file=1) 

 

def _tryconvertpyarg(self, x): 

"""Convert a dotted module name to path.""" 

try: 

with _patched_find_module(): 

loader = pkgutil.find_loader(x) 

except ImportError: 

return x 

if loader is None: 

return x 

# This method is sometimes invoked when AssertionRewritingHook, which 

# does not define a get_filename method, is already in place: 

try: 

with _patched_find_module(): 

path = loader.get_filename(x) 

except AttributeError: 

# Retrieve path from AssertionRewritingHook: 

path = loader.modules[x][0].co_filename 

if loader.is_package(x): 

path = os.path.dirname(path) 

return path 

 

def _parsearg(self, arg): 

""" return (fspath, names) tuple after checking the file exists. """ 

parts = str(arg).split("::") 

if self.config.option.pyargs: 

parts[0] = self._tryconvertpyarg(parts[0]) 

relpath = parts[0].replace("/", os.sep) 

path = self.config.invocation_dir.join(relpath, abs=True) 

if not path.check(): 

if self.config.option.pyargs: 

raise UsageError( 

"file or package not found: " + arg + " (missing __init__.py?)" 

) 

raise UsageError("file not found: " + arg) 

parts[0] = path.realpath() 

return parts 

 

def matchnodes(self, matching, names): 

self.trace("matchnodes", matching, names) 

self.trace.root.indent += 1 

nodes = self._matchnodes(matching, names) 

num = len(nodes) 

self.trace("matchnodes finished -> ", num, "nodes") 

self.trace.root.indent -= 1 

if num == 0: 

raise NoMatch(matching, names[:1]) 

return nodes 

 

def _matchnodes(self, matching, names): 

if not matching or not names: 

return matching 

name = names[0] 

assert name 

nextnames = names[1:] 

resultnodes = [] 

for node in matching: 

if isinstance(node, nodes.Item): 

if not names: 

resultnodes.append(node) 

continue 

assert isinstance(node, nodes.Collector) 

key = (type(node), node.nodeid) 

if key in self._node_cache: 

rep = self._node_cache[key] 

else: 

rep = collect_one_node(node) 

self._node_cache[key] = rep 

if rep.passed: 

has_matched = False 

for x in rep.result: 

# TODO: remove parametrized workaround once collection structure contains parametrization 

if x.name == name or x.name.split("[")[0] == name: 

resultnodes.extend(self.matchnodes([x], nextnames)) 

has_matched = True 

# XXX accept IDs that don't have "()" for class instances 

if not has_matched and len(rep.result) == 1 and x.name == "()": 

nextnames.insert(0, name) 

resultnodes.extend(self.matchnodes([x], nextnames)) 

else: 

# report collection failures here to avoid failing to run some test 

# specified in the command line because the module could not be 

# imported (#134) 

node.ihook.pytest_collectreport(report=rep) 

return resultnodes 

 

def genitems(self, node): 

self.trace("genitems", node) 

if isinstance(node, nodes.Item): 

node.ihook.pytest_itemcollected(item=node) 

yield node 

else: 

assert isinstance(node, nodes.Collector) 

rep = collect_one_node(node) 

if rep.passed: 

for subnode in rep.result: 

for x in self.genitems(subnode): 

yield x 

node.ihook.pytest_collectreport(report=rep)