Source code for _pytest.main

""" core implementation of testing process: init, session, runtest loop. """
import argparse
import fnmatch
import functools
import importlib
import os
import sys
from typing import Callable
from typing import Dict
from typing import FrozenSet
from typing import Iterator
from typing import List
from typing import Optional
from typing import Sequence
from typing import Set
from typing import Tuple
from typing import Union

import attr
import py

import _pytest._code
from _pytest import nodes
from _pytest.compat import overload
from _pytest.compat import TYPE_CHECKING
from _pytest.config import Config
from _pytest.config import directory_arg
from _pytest.config import ExitCode
from _pytest.config import hookimpl
from _pytest.config import UsageError
from _pytest.config.argparsing import Parser
from _pytest.fixtures import FixtureManager
from _pytest.outcomes import exit
from _pytest.pathlib import Path
from _pytest.reports import CollectReport
from _pytest.reports import TestReport
from _pytest.runner import collect_one_node
from _pytest.runner import SetupState

    from typing import Type
    from typing_extensions import Literal

    from _pytest.python import Package

def pytest_addoption(parser: Parser) -> None:
        "directory patterns to avoid for recursion",
        default=[".*", "build", "dist", "CVS", "_darcs", "{arch}", "*.egg", "venv"],
        "directories to search for tests when no files or directories are given in the "
        "command line.",
    group = parser.getgroup("general", "running and selection options")
        help="exit instantly on first error or failed test.",
        help="exit after first num failures or errors.",
        help="any warnings encountered while parsing the `pytest` section of the configuration file raise errors.",
        help="markers not registered in the `markers` section of the configuration file raise errors.",
        help="load configuration from `file` instead of trying to locate one of the implicit "
        "configuration files.",
        help="Force test execution even if collection errors occur.",
        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: "

    group = parser.getgroup("collect", "collection")
        help="only collect tests, don't execute them.",
        help="try to interpret all arguments as python packages.",
        help="ignore path during collection (multi-allowed).",
        help="ignore path pattern during collection (multi-allowed).",
        help="deselect item (via node id prefix) during collection (multi-allowed).",
        type=functools.partial(directory_arg, optname="--confcutdir"),
        help="only load's relative to specified dir.",
        help="Don't load any files.",
        help="Keep duplicate tests.",
        help="Don't ignore tests in a local virtualenv directory",
        choices=["prepend", "append", "importlib"],
        help="prepend/append to sys.path when importing test modules and conftest files, "
        "default is to prepend.",

    group = parser.getgroup("debugconfig", "test session debugging and configuration")
            "base temporary directory for this test run."
            "(warning: this directory is removed if it exists)"

def validate_basetemp(path: str) -> str:
    # GH 7119
    msg = "basetemp must not be empty, the current working directory or any parent directory of it"

    # empty path
    if not path:
        raise argparse.ArgumentTypeError(msg)

    def is_ancestor(base: Path, query: Path) -> bool:
        """ return True if query is an ancestor of base, else False."""
        if base == query:
            return True
        for parent in base.parents:
            if parent == query:
                return True
        return False

    # check if path is an ancestor of cwd
    if is_ancestor(Path.cwd(), Path(path).absolute()):
        raise argparse.ArgumentTypeError(msg)

    # check symlinks for ancestors
    if is_ancestor(Path.cwd().resolve(), Path(path).resolve()):
        raise argparse.ArgumentTypeError(msg)

    return path

def wrap_session(
    config: Config, doit: Callable[[Config, "Session"], Optional[Union[int, ExitCode]]]
) -> Union[int, ExitCode]:
    """Skeleton command line program"""
    session = Session.from_config(config)
    session.exitstatus = ExitCode.OK
    initstate = 0
            initstate = 1
            initstate = 2
            session.exitstatus = doit(config, session) or 0
        except UsageError:
            session.exitstatus = ExitCode.USAGE_ERROR
        except Failed:
            session.exitstatus = ExitCode.TESTS_FAILED
        except (KeyboardInterrupt, exit.Exception):
            excinfo = _pytest._code.ExceptionInfo.from_current()
            exitstatus = ExitCode.INTERRUPTED  # type: Union[int, ExitCode]
            if isinstance(excinfo.value, exit.Exception):
                if excinfo.value.returncode is not None:
                    exitstatus = excinfo.value.returncode
                if initstate < 2:
                        "{}: {}\n".format(excinfo.typename, excinfo.value.msg)
            session.exitstatus = exitstatus
        except BaseException:
            session.exitstatus = ExitCode.INTERNAL_ERROR
            excinfo = _pytest._code.ExceptionInfo.from_current()
                config.notify_exception(excinfo, config.option)
            except exit.Exception as exc:
                if exc.returncode is not None:
                    session.exitstatus = exc.returncode
                sys.stderr.write("{}: {}\n".format(type(exc).__name__, exc))
                if excinfo.errisinstance(SystemExit):
                    sys.stderr.write("mainloop: caught unexpected SystemExit!\n")

        # Explicitly break reference cycle.
        excinfo = None  # type: ignore
        if initstate >= 2:
                    session=session, exitstatus=session.exitstatus
            except exit.Exception as exc:
                if exc.returncode is not None:
                    session.exitstatus = exc.returncode
                sys.stderr.write("{}: {}\n".format(type(exc).__name__, exc))
    return session.exitstatus

def pytest_cmdline_main(config: Config) -> Union[int, ExitCode]:
    return wrap_session(config, _main)

def _main(config: Config, session: "Session") -> Optional[Union[int, ExitCode]]:
    """ default command line protocol for initialization, session,
    running tests and reporting. """

    if session.testsfailed:
        return ExitCode.TESTS_FAILED
    elif session.testscollected == 0:
        return ExitCode.NO_TESTS_COLLECTED
    return None

def pytest_collection(session: "Session") -> None:

def pytest_runtestloop(session: "Session") -> bool:
    if session.testsfailed and not session.config.option.continue_on_collection_errors:
        raise session.Interrupted(
            "%d error%s during collection"
            % (session.testsfailed, "s" if session.testsfailed != 1 else "")

    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: py.path.local) -> bool:
    """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 = (
    return any([fname.basename in activates for fname in bindir.listdir()])

def pytest_ignore_collect(path: py.path.local, config: Config) -> Optional[bool]:
    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

    ignore_globs = config._getconftest_pathlist(
        "collect_ignore_glob", path=path.dirpath()
    ignore_globs = ignore_globs or []
    excludeglobopt = config.getoption("ignore_glob")
    if excludeglobopt:
        ignore_globs.extend([py.path.local(x) for x in excludeglobopt])

    if any(fnmatch.fnmatch(str(path), str(glob)) for glob in ignore_globs):
        return True

    allow_in_venv = config.getoption("collect_in_virtualenv")
    if not allow_in_venv and _in_venv(path):
        return True
    return None

def pytest_collection_modifyitems(items: List[nodes.Item], config: Config) -> None:
    deselect_prefixes = tuple(config.getoption("deselect") or [])
    if not deselect_prefixes:

    remaining = []
    deselected = []
    for colitem in items:
        if colitem.nodeid.startswith(deselect_prefixes):

    if deselected:
        items[:] = remaining

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. """

class _bestrelpath_cache(dict):
    path = attr.ib(type=py.path.local)

    def __missing__(self, path: py.path.local) -> str:
        r = self.path.bestrelpath(path)  # type: str
        self[path] = r
        return r

[docs]class Session(nodes.FSCollector): Interrupted = Interrupted Failed = Failed # Set on the session by runner.pytest_sessionstart. _setupstate = None # type: SetupState # Set on the session by fixtures.pytest_sessionstart. _fixturemanager = None # type: FixtureManager exitstatus = None # type: Union[int, ExitCode] def __init__(self, config: Config) -> None: nodes.FSCollector.__init__( self, config.rootdir, parent=None, config=config, session=self, nodeid="" ) self.testsfailed = 0 self.testscollected = 0 self.shouldstop = False # type: Union[bool, str] self.shouldfail = False # type: Union[bool, str] self.trace = config.trace.root.get("collection") self.startdir = config.invocation_dir self._initialpaths = frozenset() # type: FrozenSet[py.path.local] # Keep track of any collected nodes in here, so we don't duplicate fixtures self._collection_node_cache1 = ( {} ) # type: Dict[py.path.local, Sequence[nodes.Collector]] self._collection_node_cache2 = ( {} ) # type: Dict[Tuple[Type[nodes.Collector], py.path.local], nodes.Collector] self._collection_node_cache3 = ( {} ) # type: Dict[Tuple[Type[nodes.Collector], str], CollectReport] # Dirnames of pkgs with dunder-init files. self._collection_pkg_roots = {} # type: Dict[str, Package] self._bestrelpathcache = _bestrelpath_cache( config.rootdir ) # type: Dict[py.path.local, str] self.config.pluginmanager.register(self, name="session") @classmethod def from_config(cls, config: Config) -> "Session": session = cls._create(config) # type: Session return session def __repr__(self) -> str: return "<%s %s exitstatus=%r testsfailed=%d testscollected=%d>" % ( self.__class__.__name__,, getattr(self, "exitstatus", "<UNSET>"), self.testsfailed, self.testscollected, ) def _node_location_to_relpath(self, node_path: py.path.local) -> str: # bestrelpath is a quite slow function return self._bestrelpathcache[node_path] @hookimpl(tryfirst=True) def pytest_collectstart(self) -> None: 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: Union[TestReport, CollectReport] ) -> None: 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: py.path.local) -> bool: return path in self._initialpaths def gethookproxy(self, fspath: py.path.local): return super()._gethookproxy(fspath) @overload def perform_collect( self, args: Optional[Sequence[str]] = ..., genitems: "Literal[True]" = ... ) -> Sequence[nodes.Item]: raise NotImplementedError() @overload # noqa: F811 def perform_collect( # noqa: F811 self, args: Optional[Sequence[str]] = ..., genitems: bool = ... ) -> Sequence[Union[nodes.Item, nodes.Collector]]: raise NotImplementedError() def perform_collect( # noqa: F811 self, args: Optional[Sequence[str]] = None, genitems: bool = True ) -> Sequence[Union[nodes.Item, nodes.Collector]]: 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 @overload def _perform_collect( self, args: Optional[Sequence[str]], genitems: "Literal[True]" ) -> List[nodes.Item]: raise NotImplementedError() @overload # noqa: F811 def _perform_collect( # noqa: F811 self, args: Optional[Sequence[str]], genitems: bool ) -> Union[List[Union[nodes.Item]], List[Union[nodes.Item, nodes.Collector]]]: raise NotImplementedError() def _perform_collect( # noqa: F811 self, args: Optional[Sequence[str]], genitems: bool ) -> Union[List[Union[nodes.Item]], List[Union[nodes.Item, nodes.Collector]]]: if args is None: args = self.config.args self.trace("perform_collect", self, args) self.trace.root.indent += 1 self._notfound = [] # type: List[Tuple[str, NoMatch]] initialpaths = [] # type: List[py.path.local] self._initial_parts = [] # type: List[Tuple[py.path.local, List[str]]] self.items = items = [] # type: List[nodes.Item] for arg in args: fspath, parts = self._parsearg(arg) self._initial_parts.append((fspath, parts)) initialpaths.append(fspath) 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})".format(arg, exc.args[0]) errors.append("not found: {}\n{}".format(arg, line)) 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
[docs] def collect(self) -> Iterator[Union[nodes.Item, nodes.Collector]]: for fspath, parts in self._initial_parts: self.trace("processing argument", (fspath, parts)) self.trace.root.indent += 1 try: yield from self._collect(fspath, parts) except NoMatch as exc: report_arg = "::".join((str(fspath), *parts)) # we are inside a make_report hook so # we cannot directly pass through the exception self._notfound.append((report_arg, exc)) self.trace.root.indent -= 1 self._collection_node_cache1.clear() self._collection_node_cache2.clear() self._collection_node_cache3.clear() self._collection_pkg_roots.clear()
def _collect( self, argpath: py.path.local, names: List[str] ) -> Iterator[Union[nodes.Item, nodes.Collector]]: from _pytest.python import Package # 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.getoption("doctestmodules", False): pm = self.config.pluginmanager for parent in reversed( if pm._confcutdir and pm._confcutdir.relto(parent): break if parent.isdir(): pkginit = parent.join("") if pkginit.isfile(): if pkginit not in self._collection_node_cache1: col = self._collectfile(pkginit, handle_dupes=False) if col: if isinstance(col[0], Package): self._collection_pkg_roots[str(parent)] = col[0] # always store a list in the cache, matchnodes expects it self._collection_node_cache1[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}".format((argpath, names)) seen_dirs = set() # type: Set[py.path.local] 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("") if pkginit.exists(): for x in self._collectfile(pkginit): yield x if isinstance(x, Package): self._collection_pkg_roots[str(dirpath)] = x if str(dirpath) in self._collection_pkg_roots: # Do not collect packages here. continue for x in self._collectfile(path): key = (type(x), x.fspath) if key in self._collection_node_cache2: yield self._collection_node_cache2[key] else: self._collection_node_cache2[key] = x yield x else: assert argpath.check(file=1) if argpath in self._collection_node_cache1: col = self._collection_node_cache1[argpath] else: collect_root = self._collection_pkg_roots.get(argpath.dirname, self) col = collect_root._collectfile(argpath, handle_dupes=False) if col: self._collection_node_cache1[argpath] = col m = self.matchnodes(col, names) # If 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 == "": assert isinstance(m[0], nodes.Collector) try: yield next(iter(m[0].collect())) except StopIteration: # The package collects nothing with only an # file in it, which gets ignored by the default # "python_files" option. pass return yield from m @staticmethod def _visit_filter(f: py.path.local) -> bool: # TODO: Remove type: ignore once `py` is typed. return f.check(file=1) # type: ignore def _tryconvertpyarg(self, x: str) -> str: """Convert a dotted module name to path.""" try: spec = importlib.util.find_spec(x) # AttributeError: looks like package module, but actually filename # ImportError: module does not exist # ValueError: not a module name except (AttributeError, ImportError, ValueError): return x if spec is None or spec.origin is None or spec.origin == "namespace": return x elif spec.submodule_search_locations: return os.path.dirname(spec.origin) else: return spec.origin def _parsearg(self, arg: str) -> Tuple[py.path.local, List[str]]: """ return (fspath, names) tuple after checking the file exists. """ strpath, *parts = str(arg).split("::") if self.config.option.pyargs: strpath = self._tryconvertpyarg(strpath) relpath = strpath.replace("/", os.sep) fspath = self.config.invocation_dir.join(relpath, abs=True) if not fspath.check(): if self.config.option.pyargs: raise UsageError( "file or package not found: " + arg + " (missing" ) raise UsageError("file not found: " + arg) return (fspath, parts) def matchnodes( self, matching: Sequence[Union[nodes.Item, nodes.Collector]], names: List[str], ) -> Sequence[Union[nodes.Item, nodes.Collector]]: 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: Sequence[Union[nodes.Item, nodes.Collector]], names: List[str], ) -> Sequence[Union[nodes.Item, nodes.Collector]]: if not matching or not names: return matching name = names[0] assert name nextnames = names[1:] resultnodes = [] # type: List[Union[nodes.Item, nodes.Collector]] 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._collection_node_cache3: rep = self._collection_node_cache3[key] else: rep = collect_one_node(node) self._collection_node_cache3[key] = rep if rep.passed: has_matched = False for x in rep.result: # TODO: remove parametrized workaround once collection structure contains parametrization if == name or"[")[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 == "()": 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: Union[nodes.Item, nodes.Collector] ) -> Iterator[nodes.Item]: 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: yield from self.genitems(subnode) node.ihook.pytest_collectreport(report=rep)