Current File : //opt/alt/python37/lib/python3.7/site-packages/alembic/testing/plugin/pytestplugin.py
"""NOTE: copied/adapted from SQLAlchemy master for backwards compatibility;
this should be removable when Alembic targets SQLAlchemy 1.0.0.
"""
try:
# installed by bootstrap.py
import alembic_plugin_base as plugin_base
except ImportError:
# assume we're a package, use traditional import
from . import plugin_base
import sys
py3k = sys.version_info >= (3, 0)
import pytest
import argparse
import inspect
import collections
import itertools
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
group.addoption(name, **kw)
plugin_base.setup_options(make_option)
plugin_base.read_config()
def pytest_configure(config):
if hasattr(config, "slaveinput"):
plugin_base.restore_important_follower_config(config.slaveinput)
plugin_base.configure_follower(
config.slaveinput["follower_ident"]
)
plugin_base.pre_begin(config.option)
coverage = bool(getattr(config.option, "cov_source", False))
plugin_base.set_coverage_flag(coverage)
def pytest_sessionstart(session):
plugin_base.post_begin()
if has_xdist:
_follower_count = itertools.count(1)
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" % next(_follower_count)
from alembic.testing import provision
provision.create_follower_db(node.slaveinput["follower_ident"])
def pytest_testnodedown(node, error):
from alembic.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(list)
items[:] = [
item for item in
items if isinstance(item.parent, pytest.Instance)]
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:
list_ = rebuilt_items[test_class.cls]
for inst in pytest.Class(
sub_cls.__name__,
parent=test_class.parent.parent).collect():
list_.extend(inst.collect())
newitems = []
for item in items:
if item.parent.cls in rebuilt_items:
newitems.extend(rebuilt_items[item.parent.cls])
rebuilt_items[item.parent.cls][:] = []
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(obj):
return pytest.Class(name, parent=collector)
elif inspect.isfunction(obj) and \
isinstance(collector, pytest.Instance) and \
plugin_base.want_method(collector.cls, obj):
return pytest.Function(name, parent=collector)
else:
return []
_current_class = None
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)
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