OpenHome/venv/Lib/site-packages/sqlalchemy/testing/plugin/pytestplugin.py
2021-07-21 21:33:05 +02:00

775 lines
24 KiB
Python

try:
# installed by bootstrap.py
import sqla_plugin_base as plugin_base
except ImportError:
# assume we're a package, use traditional import
from . import plugin_base
import argparse
import collections
from functools import update_wrapper
import inspect
import itertools
import operator
import os
import re
import sys
import pytest
try:
import xdist # noqa
has_xdist = True
except ImportError:
has_xdist = False
py2k = sys.version_info < (3, 0)
if py2k:
try:
import sqla_reinvent_fixtures as reinvent_fixtures_py2k
except ImportError:
from . import reinvent_fixtures_py2k
def pytest_addoption(parser):
group = parser.getgroup("sqlalchemy")
def make_option(name, **kw):
callback_ = kw.pop("callback", None)
if callback_:
class CallableAction(argparse.Action):
def __call__(
self, parser, namespace, values, option_string=None
):
callback_(option_string, values, parser)
kw["action"] = CallableAction
zeroarg_callback = kw.pop("zeroarg_callback", None)
if zeroarg_callback:
class CallableAction(argparse.Action):
def __init__(
self,
option_strings,
dest,
default=False,
required=False,
help=None, # noqa
):
super(CallableAction, self).__init__(
option_strings=option_strings,
dest=dest,
nargs=0,
const=True,
default=default,
required=required,
help=help,
)
def __call__(
self, parser, namespace, values, option_string=None
):
zeroarg_callback(option_string, values, parser)
kw["action"] = CallableAction
group.addoption(name, **kw)
plugin_base.setup_options(make_option)
plugin_base.read_config()
def pytest_configure(config):
if hasattr(config, "workerinput"):
plugin_base.restore_important_follower_config(config.workerinput)
plugin_base.configure_follower(config.workerinput["follower_ident"])
else:
if config.option.write_idents and os.path.exists(
config.option.write_idents
):
os.remove(config.option.write_idents)
plugin_base.pre_begin(config.option)
plugin_base.set_coverage_flag(
bool(getattr(config.option, "cov_source", False))
)
plugin_base.set_fixture_functions(PytestFixtureFunctions)
if config.option.dump_pyannotate:
global DUMP_PYANNOTATE
DUMP_PYANNOTATE = True
DUMP_PYANNOTATE = False
@pytest.fixture(autouse=True)
def collect_types_fixture():
if DUMP_PYANNOTATE:
from pyannotate_runtime import collect_types
collect_types.start()
yield
if DUMP_PYANNOTATE:
collect_types.stop()
def pytest_sessionstart(session):
from sqlalchemy.testing import asyncio
asyncio._assume_async(plugin_base.post_begin)
def pytest_sessionfinish(session):
from sqlalchemy.testing import asyncio
asyncio._maybe_async_provisioning(plugin_base.final_process_cleanup)
if session.config.option.dump_pyannotate:
from pyannotate_runtime import collect_types
collect_types.dump_stats(session.config.option.dump_pyannotate)
def pytest_collection_finish(session):
if session.config.option.dump_pyannotate:
from pyannotate_runtime import collect_types
lib_sqlalchemy = os.path.abspath("lib/sqlalchemy")
def _filter(filename):
filename = os.path.normpath(os.path.abspath(filename))
if "lib/sqlalchemy" not in os.path.commonpath(
[filename, lib_sqlalchemy]
):
return None
if "testing" in filename:
return None
return filename
collect_types.init_types_collection(filter_filename=_filter)
if has_xdist:
import uuid
def pytest_configure_node(node):
from sqlalchemy.testing import provision
from sqlalchemy.testing import asyncio
# the master for each node fills workerinput dictionary
# which pytest-xdist will transfer to the subprocess
plugin_base.memoize_important_follower_config(node.workerinput)
node.workerinput["follower_ident"] = "test_%s" % uuid.uuid4().hex[0:12]
asyncio._maybe_async_provisioning(
provision.create_follower_db, node.workerinput["follower_ident"]
)
def pytest_testnodedown(node, error):
from sqlalchemy.testing import provision
from sqlalchemy.testing import asyncio
asyncio._maybe_async_provisioning(
provision.drop_follower_db, node.workerinput["follower_ident"]
)
def pytest_collection_modifyitems(session, config, items):
# look for all those classes that specify __backend__ and
# expand them out into per-database test cases.
# this is much easier to do within pytest_pycollect_makeitem, however
# pytest is iterating through cls.__dict__ as makeitem is
# called which causes a "dictionary changed size" error on py3k.
# I'd submit a pullreq for them to turn it into a list first, but
# it's to suit the rather odd use case here which is that we are adding
# new classes to a module on the fly.
from sqlalchemy.testing import asyncio
rebuilt_items = collections.defaultdict(
lambda: collections.defaultdict(list)
)
items[:] = [
item
for item in items
if isinstance(item.parent, pytest.Instance)
and not item.parent.parent.name.startswith("_")
]
test_classes = set(item.parent for item in items)
def setup_test_classes():
for test_class in test_classes:
for sub_cls in plugin_base.generate_sub_tests(
test_class.cls, test_class.parent.module
):
if sub_cls is not test_class.cls:
per_cls_dict = rebuilt_items[test_class.cls]
# support pytest 5.4.0 and above pytest.Class.from_parent
ctor = getattr(pytest.Class, "from_parent", pytest.Class)
for inst in ctor(
name=sub_cls.__name__, parent=test_class.parent.parent
).collect():
for t in inst.collect():
per_cls_dict[t.name].append(t)
# class requirements will sometimes need to access the DB to check
# capabilities, so need to do this for async
asyncio._maybe_async_provisioning(setup_test_classes)
newitems = []
for item in items:
if item.parent.cls in rebuilt_items:
newitems.extend(rebuilt_items[item.parent.cls][item.name])
else:
newitems.append(item)
if py2k:
for item in newitems:
reinvent_fixtures_py2k.scan_for_fixtures_to_use_for_class(item)
# seems like the functions attached to a test class aren't sorted already?
# is that true and why's that? (when using unittest, they're sorted)
items[:] = sorted(
newitems,
key=lambda item: (
item.parent.parent.parent.name,
item.parent.parent.name,
item.name,
),
)
def pytest_pycollect_makeitem(collector, name, obj):
if inspect.isclass(obj) and plugin_base.want_class(name, obj):
from sqlalchemy.testing import config
if config.any_async:
obj = _apply_maybe_async(obj)
ctor = getattr(pytest.Class, "from_parent", pytest.Class)
return [
ctor(name=parametrize_cls.__name__, parent=collector)
for parametrize_cls in _parametrize_cls(collector.module, obj)
]
elif (
inspect.isfunction(obj)
and isinstance(collector, pytest.Instance)
and plugin_base.want_method(collector.cls, obj)
):
# None means, fall back to default logic, which includes
# method-level parametrize
return None
else:
# empty list means skip this item
return []
def _is_wrapped_coroutine_function(fn):
while hasattr(fn, "__wrapped__"):
fn = fn.__wrapped__
return inspect.iscoroutinefunction(fn)
def _apply_maybe_async(obj, recurse=True):
from sqlalchemy.testing import asyncio
for name, value in vars(obj).items():
if (
(callable(value) or isinstance(value, classmethod))
and not getattr(value, "_maybe_async_applied", False)
and (name.startswith("test_"))
and not _is_wrapped_coroutine_function(value)
):
is_classmethod = False
if isinstance(value, classmethod):
value = value.__func__
is_classmethod = True
@_pytest_fn_decorator
def make_async(fn, *args, **kwargs):
return asyncio._maybe_async(fn, *args, **kwargs)
do_async = make_async(value)
if is_classmethod:
do_async = classmethod(do_async)
do_async._maybe_async_applied = True
setattr(obj, name, do_async)
if recurse:
for cls in obj.mro()[1:]:
if cls != object:
_apply_maybe_async(cls, False)
return obj
def _parametrize_cls(module, cls):
"""implement a class-based version of pytest parametrize."""
if "_sa_parametrize" not in cls.__dict__:
return [cls]
_sa_parametrize = cls._sa_parametrize
classes = []
for full_param_set in itertools.product(
*[params for argname, params in _sa_parametrize]
):
cls_variables = {}
for argname, param in zip(
[_sa_param[0] for _sa_param in _sa_parametrize], full_param_set
):
if not argname:
raise TypeError("need argnames for class-based combinations")
argname_split = re.split(r",\s*", argname)
for arg, val in zip(argname_split, param.values):
cls_variables[arg] = val
parametrized_name = "_".join(
# token is a string, but in py2k pytest is giving us a unicode,
# so call str() on it.
str(re.sub(r"\W", "", token))
for param in full_param_set
for token in param.id.split("-")
)
name = "%s_%s" % (cls.__name__, parametrized_name)
newcls = type.__new__(type, name, (cls,), cls_variables)
setattr(module, name, newcls)
classes.append(newcls)
return classes
_current_class = None
def pytest_runtest_setup(item):
from sqlalchemy.testing import asyncio
if not isinstance(item, pytest.Function):
return
# pytest_runtest_setup runs *before* pytest fixtures with scope="class".
# plugin_base.start_test_class_outside_fixtures may opt to raise SkipTest
# for the whole class and has to run things that are across all current
# databases, so we run this outside of the pytest fixture system altogether
# and ensure asyncio greenlet if any engines are async
global _current_class
if _current_class is None:
asyncio._maybe_async_provisioning(
plugin_base.start_test_class_outside_fixtures,
item.parent.parent.cls,
)
_current_class = item.parent.parent
def finalize():
global _current_class
_current_class = None
asyncio._maybe_async_provisioning(
plugin_base.stop_test_class_outside_fixtures,
item.parent.parent.cls,
)
item.parent.parent.addfinalizer(finalize)
def pytest_runtest_call(item):
# runs inside of pytest function fixture scope
# before test function runs
from sqlalchemy.testing import asyncio
asyncio._maybe_async(
plugin_base.before_test,
item,
item.parent.module.__name__,
item.parent.cls,
item.name,
)
def pytest_runtest_teardown(item, nextitem):
# runs inside of pytest function fixture scope
# after test function runs
from sqlalchemy.testing import asyncio
asyncio._maybe_async(plugin_base.after_test, item)
@pytest.fixture(scope="class")
def setup_class_methods(request):
from sqlalchemy.testing import asyncio
cls = request.cls
if hasattr(cls, "setup_test_class"):
asyncio._maybe_async(cls.setup_test_class)
if py2k:
reinvent_fixtures_py2k.run_class_fixture_setup(request)
yield
if py2k:
reinvent_fixtures_py2k.run_class_fixture_teardown(request)
if hasattr(cls, "teardown_test_class"):
asyncio._maybe_async(cls.teardown_test_class)
asyncio._maybe_async(plugin_base.stop_test_class, cls)
@pytest.fixture(scope="function")
def setup_test_methods(request):
from sqlalchemy.testing import asyncio
# called for each test
self = request.instance
# 1. run outer xdist-style setup
if hasattr(self, "setup_test"):
asyncio._maybe_async(self.setup_test)
# alembic test suite is using setUp and tearDown
# xdist methods; support these in the test suite
# for the near term
if hasattr(self, "setUp"):
asyncio._maybe_async(self.setUp)
# 2. run homegrown function level "autouse" fixtures under py2k
if py2k:
reinvent_fixtures_py2k.run_fn_fixture_setup(request)
# inside the yield:
# 3. function level "autouse" fixtures under py3k (examples: TablesTest
# define tables / data, MappedTest define tables / mappers / data)
# 4. function level fixtures defined on test functions themselves,
# e.g. "connection", "metadata" run next
# 5. pytest hook pytest_runtest_call then runs
# 6. test itself runs
yield
# yield finishes:
# 7. pytest hook pytest_runtest_teardown hook runs, this is associated
# with fixtures close all sessions, provisioning.stop_test_class(),
# engines.testing_reaper -> ensure all connection pool connections
# are returned, engines created by testing_engine that aren't the
# config engine are disposed
# 8. function level fixtures defined on test functions
# themselves, e.g. "connection" rolls back the transaction, "metadata"
# emits drop all
# 9. function level "autouse" fixtures under py3k (examples: TablesTest /
# MappedTest delete table data, possibly drop tables and clear mappers
# depending on the flags defined by the test class)
# 10. run homegrown function-level "autouse" fixtures under py2k
if py2k:
reinvent_fixtures_py2k.run_fn_fixture_teardown(request)
asyncio._maybe_async(plugin_base.after_test_fixtures, self)
# 11. run outer xdist-style teardown
if hasattr(self, "tearDown"):
asyncio._maybe_async(self.tearDown)
if hasattr(self, "teardown_test"):
asyncio._maybe_async(self.teardown_test)
def getargspec(fn):
if sys.version_info.major == 3:
return inspect.getfullargspec(fn)
else:
return inspect.getargspec(fn)
def _pytest_fn_decorator(target):
"""Port of langhelpers.decorator with pytest-specific tricks."""
from sqlalchemy.util.langhelpers import format_argspec_plus
from sqlalchemy.util.compat import inspect_getfullargspec
def _exec_code_in_env(code, env, fn_name):
exec(code, env)
return env[fn_name]
def decorate(fn, add_positional_parameters=()):
spec = inspect_getfullargspec(fn)
if add_positional_parameters:
spec.args.extend(add_positional_parameters)
metadata = dict(
__target_fn="__target_fn", __orig_fn="__orig_fn", name=fn.__name__
)
metadata.update(format_argspec_plus(spec, grouped=False))
code = (
"""\
def %(name)s(%(args)s):
return %(__target_fn)s(%(__orig_fn)s, %(apply_kw)s)
"""
% metadata
)
decorated = _exec_code_in_env(
code, {"__target_fn": target, "__orig_fn": fn}, fn.__name__
)
if not add_positional_parameters:
decorated.__defaults__ = getattr(fn, "__func__", fn).__defaults__
decorated.__wrapped__ = fn
return update_wrapper(decorated, fn)
else:
# this is the pytest hacky part. don't do a full update wrapper
# because pytest is really being sneaky about finding the args
# for the wrapped function
decorated.__module__ = fn.__module__
decorated.__name__ = fn.__name__
if hasattr(fn, "pytestmark"):
decorated.pytestmark = fn.pytestmark
return decorated
return decorate
class PytestFixtureFunctions(plugin_base.FixtureFunctions):
def skip_test_exception(self, *arg, **kw):
return pytest.skip.Exception(*arg, **kw)
def mark_base_test_class(self):
return pytest.mark.usefixtures(
"setup_class_methods", "setup_test_methods"
)
_combination_id_fns = {
"i": lambda obj: obj,
"r": repr,
"s": str,
"n": lambda obj: obj.__name__
if hasattr(obj, "__name__")
else type(obj).__name__,
}
def combinations(self, *arg_sets, **kw):
"""Facade for pytest.mark.parametrize.
Automatically derives argument names from the callable which in our
case is always a method on a class with positional arguments.
ids for parameter sets are derived using an optional template.
"""
from sqlalchemy.testing import exclusions
if sys.version_info.major == 3:
if len(arg_sets) == 1 and hasattr(arg_sets[0], "__next__"):
arg_sets = list(arg_sets[0])
else:
if len(arg_sets) == 1 and hasattr(arg_sets[0], "next"):
arg_sets = list(arg_sets[0])
argnames = kw.pop("argnames", None)
def _filter_exclusions(args):
result = []
gathered_exclusions = []
for a in args:
if isinstance(a, exclusions.compound):
gathered_exclusions.append(a)
else:
result.append(a)
return result, gathered_exclusions
id_ = kw.pop("id_", None)
tobuild_pytest_params = []
has_exclusions = False
if id_:
_combination_id_fns = self._combination_id_fns
# because itemgetter is not consistent for one argument vs.
# multiple, make it multiple in all cases and use a slice
# to omit the first argument
_arg_getter = operator.itemgetter(
0,
*[
idx
for idx, char in enumerate(id_)
if char in ("n", "r", "s", "a")
]
)
fns = [
(operator.itemgetter(idx), _combination_id_fns[char])
for idx, char in enumerate(id_)
if char in _combination_id_fns
]
for arg in arg_sets:
if not isinstance(arg, tuple):
arg = (arg,)
fn_params, param_exclusions = _filter_exclusions(arg)
parameters = _arg_getter(fn_params)[1:]
if param_exclusions:
has_exclusions = True
tobuild_pytest_params.append(
(
parameters,
param_exclusions,
"-".join(
comb_fn(getter(arg)) for getter, comb_fn in fns
),
)
)
else:
for arg in arg_sets:
if not isinstance(arg, tuple):
arg = (arg,)
fn_params, param_exclusions = _filter_exclusions(arg)
if param_exclusions:
has_exclusions = True
tobuild_pytest_params.append(
(fn_params, param_exclusions, None)
)
pytest_params = []
for parameters, param_exclusions, id_ in tobuild_pytest_params:
if has_exclusions:
parameters += (param_exclusions,)
param = pytest.param(*parameters, id=id_)
pytest_params.append(param)
def decorate(fn):
if inspect.isclass(fn):
if has_exclusions:
raise NotImplementedError(
"exclusions not supported for class level combinations"
)
if "_sa_parametrize" not in fn.__dict__:
fn._sa_parametrize = []
fn._sa_parametrize.append((argnames, pytest_params))
return fn
else:
if argnames is None:
_argnames = getargspec(fn).args[1:]
else:
_argnames = re.split(r", *", argnames)
if has_exclusions:
_argnames += ["_exclusions"]
@_pytest_fn_decorator
def check_exclusions(fn, *args, **kw):
_exclusions = args[-1]
if _exclusions:
exlu = exclusions.compound().add(*_exclusions)
fn = exlu(fn)
return fn(*args[0:-1], **kw)
def process_metadata(spec):
spec.args.append("_exclusions")
fn = check_exclusions(
fn, add_positional_parameters=("_exclusions",)
)
return pytest.mark.parametrize(_argnames, pytest_params)(fn)
return decorate
def param_ident(self, *parameters):
ident = parameters[0]
return pytest.param(*parameters[1:], id=ident)
def fixture(self, *arg, **kw):
from sqlalchemy.testing import config
from sqlalchemy.testing import asyncio
# wrapping pytest.fixture function. determine if
# decorator was called as @fixture or @fixture().
if len(arg) > 0 and callable(arg[0]):
# was called as @fixture(), we have the function to wrap.
fn = arg[0]
arg = arg[1:]
else:
# was called as @fixture, don't have the function yet.
fn = None
# create a pytest.fixture marker. because the fn is not being
# passed, this is always a pytest.FixtureFunctionMarker()
# object (or whatever pytest is calling it when you read this)
# that is waiting for a function.
fixture = pytest.fixture(*arg, **kw)
# now apply wrappers to the function, including fixture itself
def wrap(fn):
if config.any_async:
fn = asyncio._maybe_async_wrapper(fn)
# other wrappers may be added here
if py2k and "autouse" in kw:
# py2k workaround for too-slow collection of autouse fixtures
# in pytest 4.6.11. See notes in reinvent_fixtures_py2k for
# rationale.
# comment this condition out in order to disable the
# py2k workaround entirely.
reinvent_fixtures_py2k.add_fixture(fn, fixture)
else:
# now apply FixtureFunctionMarker
fn = fixture(fn)
return fn
if fn:
return wrap(fn)
else:
return wrap
def get_current_test_name(self):
return os.environ.get("PYTEST_CURRENT_TEST")
def async_test(self, fn):
from sqlalchemy.testing import asyncio
@_pytest_fn_decorator
def decorate(fn, *args, **kwargs):
asyncio._run_coroutine_function(fn, *args, **kwargs)
return decorate(fn)