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# testing/plugin/pytestplugin.py
# Copyright (C) 2005-2024 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php
# mypy: ignore-errors
from __future__ import annotations
import argparse
import collections
from functools import update_wrapper
import inspect
import itertools
import operator
import os
import re
import sys
from typing import TYPE_CHECKING
import uuid
import pytest
try:
# installed by bootstrap.py
if not TYPE_CHECKING:
import sqla_plugin_base as plugin_base
except ImportError:
# assume we're a package, use traditional import
from . import plugin_base
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().__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)
def pytest_configure(config: pytest.Config):
plugin_base.read_config(config.rootpath)
if plugin_base.exclude_tags or plugin_base.include_tags:
new_expr = " and ".join(
list(plugin_base.include_tags)
+ [f"not {tag}" for tag in plugin_base.exclude_tags]
)
if config.option.markexpr:
config.option.markexpr += f" and {new_expr}"
else:
config.option.markexpr = new_expr
if config.pluginmanager.hasplugin("xdist"):
config.pluginmanager.register(XDistHooks())
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 _log_sqlalchemy_info(session):
import sqlalchemy
from sqlalchemy import __version__
from sqlalchemy.util import has_compiled_ext
from sqlalchemy.util._has_cy import _CYEXTENSION_MSG
greet = "sqlalchemy installation"
site = "no user site" if sys.flags.no_user_site else "user site loaded"
msgs = [
f"SQLAlchemy {__version__} ({site})",
f"Path: {sqlalchemy.__file__}",
]
if has_compiled_ext():
from sqlalchemy.cyextension import util
msgs.append(f"compiled extension enabled, e.g. {util.__file__} ")
else:
msgs.append(f"compiled extension not enabled; {_CYEXTENSION_MSG}")
pm = session.config.pluginmanager.get_plugin("terminalreporter")
if pm:
pm.write_sep("=", greet)
for m in msgs:
pm.write_line(m)
else:
# fancy pants reporter not found, fallback to plain print
print("=" * 25, greet, "=" * 25)
for m in msgs:
print(m)
def pytest_sessionstart(session):
from sqlalchemy.testing import asyncio
_log_sqlalchemy_info(session)
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_unconfigure(config):
from sqlalchemy.testing import asyncio
asyncio._shutdown()
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)
class XDistHooks:
def pytest_configure_node(self, 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(self, 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 item.getparent(pytest.Class) is not None
and not item.getparent(pytest.Class).name.startswith("_")
]
test_classes = {item.getparent(pytest.Class) for item in items}
def collect(element):
for inst_or_fn in element.collect():
if isinstance(inst_or_fn, pytest.Collector):
yield from collect(inst_or_fn)
else:
yield inst_or_fn
def setup_test_classes():
for test_class in test_classes:
# transfer legacy __backend__ and __sparse_backend__ symbols
# to be markers
add_markers = set()
if getattr(test_class.cls, "__backend__", False) or getattr(
test_class.cls, "__only_on__", False
):
add_markers = {"backend"}
elif getattr(test_class.cls, "__sparse_backend__", False):
add_markers = {"sparse_backend"}
else:
add_markers = frozenset()
existing_markers = {
mark.name for mark in test_class.iter_markers()
}
add_markers = add_markers - existing_markers
all_markers = existing_markers.union(add_markers)
for marker in add_markers:
test_class.add_marker(marker)
for sub_cls in plugin_base.generate_sub_tests(
test_class.cls, test_class.module, all_markers
):
if sub_cls is not test_class.cls:
per_cls_dict = rebuilt_items[test_class.cls]
module = test_class.getparent(pytest.Module)
new_cls = pytest.Class.from_parent(
name=sub_cls.__name__, parent=module
)
for marker in add_markers:
new_cls.add_marker(marker)
for fn in collect(new_cls):
per_cls_dict[fn.name].append(fn)
# 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:
cls_ = item.cls
if cls_ in rebuilt_items:
newitems.extend(rebuilt_items[cls_][item.name])
else:
newitems.append(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.getparent(pytest.Module).name,
item.getparent(pytest.Class).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)
return [
pytest.Class.from_parent(
name=parametrize_cls.__name__, parent=collector
)
for parametrize_cls in _parametrize_cls(collector.module, obj)
]
elif (
inspect.isfunction(obj)
and collector.cls is not None
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(
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
# 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 isinstance(item, pytest.Function) and _current_class is None:
asyncio._maybe_async_provisioning(
plugin_base.start_test_class_outside_fixtures,
item.cls,
)
_current_class = item.getparent(pytest.Class)
@pytest.hookimpl(hookwrapper=True)
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)
yield
# this is now after all the fixture teardown have run, the class can be
# finalized. Since pytest v7 this finalizer can no longer be added in
# pytest_runtest_setup since the class has not yet been setup at that
# time.
# See https://github.com/pytest-dev/pytest/issues/9343
global _current_class, _current_report
if _current_class is not None and (
# last test or a new class
nextitem is None
or nextitem.getparent(pytest.Class) is not _current_class
):
_current_class = None
try:
asyncio._maybe_async_provisioning(
plugin_base.stop_test_class_outside_fixtures, item.cls
)
except Exception as e:
# in case of an exception during teardown attach the original
# error to the exception message, otherwise it will get lost
if _current_report.failed:
if not e.args:
e.args = (
"__Original test failure__:\n"
+ _current_report.longreprtext,
)
elif e.args[-1] and isinstance(e.args[-1], str):
args = list(e.args)
args[-1] += (
"\n__Original test failure__:\n"
+ _current_report.longreprtext
)
e.args = tuple(args)
else:
e.args += (
"__Original test failure__",
_current_report.longreprtext,
)
raise
finally:
_current_report = None
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.module.__name__,
item.cls,
item.name,
)
_current_report = None
def pytest_runtest_logreport(report):
global _current_report
if report.when == "call":
_current_report = report
@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)
yield
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
# before this fixture runs:
# 1. function level "autouse" fixtures under py3k (examples: TablesTest
# define tables / data, MappedTest define tables / mappers / data)
# 2. was for p2k. no longer applies
# 3. 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)
# inside the yield:
# 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. function level fixtures defined on test functions
# themselves, e.g. "connection" rolls back the transaction, "metadata"
# emits drop all
# 8. 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
asyncio._maybe_async(plugin_base.after_test_fixtures, self)
# 10. run xdist-style teardown
if hasattr(self, "tearDown"):
asyncio._maybe_async(self.tearDown)
if hasattr(self, "teardown_test"):
asyncio._maybe_async(self.teardown_test)
# 11. was for p2k. no longer applies
# 12. 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)
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):
# note this is affected by "from __future__ import annotations" at
# the top; exec'ed code will use non-evaluated annotations
# which allows us to be more flexible with code rendering
# in format_argpsec_plus()
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%(grouped_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)
@property
def add_to_marker(self):
return pytest.mark
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 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:
_fn_argnames = inspect.getfullargspec(fn).args[1:]
if argnames is None:
_argnames = _fn_argnames
else:
_argnames = re.split(r", *", argnames)
if has_exclusions:
existing_exl = sum(
1 for n in _fn_argnames if n.startswith("_exclusions")
)
current_exclusion_name = f"_exclusions_{existing_exl}"
_argnames += [current_exclusion_name]
@_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[:-1], **kw)
fn = check_exclusions(
fn, add_positional_parameters=(current_exclusion_name,)
)
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
# 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)