tuxbot-bot/venv/lib/python3.7/site-packages/sqlalchemy/testing/plugin/pytestplugin.py

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2019-12-16 18:12:10 +01:00
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
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
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):
pytest.register_assert_rewrite("sqlalchemy.testing.assertions")
if hasattr(config, "slaveinput"):
plugin_base.restore_important_follower_config(config.slaveinput)
plugin_base.configure_follower(config.slaveinput["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)
def pytest_sessionstart(session):
plugin_base.post_begin()
def pytest_sessionfinish(session):
plugin_base.final_process_cleanup()
if has_xdist:
import uuid
def pytest_configure_node(node):
# the master for each node fills slaveinput dictionary
# which pytest-xdist will transfer to the subprocess
plugin_base.memoize_important_follower_config(node.slaveinput)
node.slaveinput["follower_ident"] = "test_%s" % uuid.uuid4().hex[0:12]
from sqlalchemy.testing import provision
provision.create_follower_db(node.slaveinput["follower_ident"])
def pytest_testnodedown(node, error):
from sqlalchemy.testing import provision
provision.drop_follower_db(node.slaveinput["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.
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)
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]
for inst in pytest.Class(
sub_cls.__name__, parent=test_class.parent.parent
).collect():
for t in inst.collect():
per_cls_dict[t.name].append(t)
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)
# 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):
return [
pytest.Class(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 []
_current_class = None
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 py.test 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
def pytest_runtest_setup(item):
# here we seem to get called only based on what we collected
# in pytest_collection_modifyitems. So to do class-based stuff
# we have to tear that out.
global _current_class
if not isinstance(item, pytest.Function):
return
# ... so we're doing a little dance here to figure it out...
if _current_class is None:
class_setup(item.parent.parent)
_current_class = item.parent.parent
# this is needed for the class-level, to ensure that the
# teardown runs after the class is completed with its own
# class-level teardown...
def finalize():
global _current_class
class_teardown(item.parent.parent)
_current_class = None
item.parent.parent.addfinalizer(finalize)
test_setup(item)
def pytest_runtest_teardown(item):
# ...but this works better as the hook here rather than
# using a finalizer, as the finalizer seems to get in the way
# of the test reporting failures correctly (you get a bunch of
# py.test assertion stuff instead)
test_teardown(item)
def test_setup(item):
plugin_base.before_test(
item, item.parent.module.__name__, item.parent.cls, item.name
)
def test_teardown(item):
plugin_base.after_test(item)
def class_setup(item):
plugin_base.start_test_class(item.cls)
def class_teardown(item):
plugin_base.stop_test_class(item.cls)
def getargspec(fn):
if sys.version_info.major == 3:
return inspect.getfullargspec(fn)
else:
return inspect.getargspec(fn)
class PytestFixtureFunctions(plugin_base.FixtureFunctions):
def skip_test_exception(self, *arg, **kw):
return pytest.skip.Exception(*arg, **kw)
_combination_id_fns = {
"i": lambda obj: obj,
"r": repr,
"s": str,
"n": operator.attrgetter("__name__"),
}
def combinations(self, *arg_sets, **kw):
"""facade for pytest.mark.paramtrize.
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)
exclusion_combinations = []
def _filter_exclusions(args):
result = []
gathered_exclusions = []
for a in args:
if isinstance(a, exclusions.compound):
gathered_exclusions.append(a)
else:
result.append(a)
exclusion_combinations.extend(
[(exclusion, result) for exclusion in gathered_exclusions]
)
return result
id_ = kw.pop("id_", None)
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
]
arg_sets = [
pytest.param(
*_arg_getter(_filter_exclusions(arg))[1:],
id="-".join(
comb_fn(getter(arg)) for getter, comb_fn in fns
)
)
for arg in arg_sets
]
else:
# ensure using pytest.param so that even a 1-arg paramset
# still needs to be a tuple. otherwise paramtrize tries to
# interpret a single arg differently than tuple arg
arg_sets = [
pytest.param(*_filter_exclusions(arg)) for arg in arg_sets
]
def decorate(fn):
if inspect.isclass(fn):
if "_sa_parametrize" not in fn.__dict__:
fn._sa_parametrize = []
fn._sa_parametrize.append((argnames, arg_sets))
return fn
else:
if argnames is None:
_argnames = getargspec(fn).args[1:]
else:
_argnames = argnames
if exclusion_combinations:
for exclusion, combination in exclusion_combinations:
combination_by_kw = {
argname: val
for argname, val in zip(_argnames, combination)
}
exclusion = exclusion.with_combination(
**combination_by_kw
)
fn = exclusion(fn)
return pytest.mark.parametrize(_argnames, arg_sets)(fn)
return decorate
def param_ident(self, *parameters):
ident = parameters[0]
return pytest.param(*parameters[1:], id=ident)
def fixture(self, *arg, **kw):
return pytest.fixture(*arg, **kw)
def get_current_test_name(self):
return os.environ.get("PYTEST_CURRENT_TEST")