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# plugin/plugin_base.py
# Copyright (C) 2005-2021 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
"""Testing extensions.
this module is designed to work as a testing-framework-agnostic library,
created so that multiple test frameworks can be supported at once
(mostly so that we can migrate to new ones). The current target
is pytest.
"""
from __future__ import absolute_import
import abc
import re
import sys
py3k = sys.version_info >= (3, 0)
if py3k:
import configparser
ABC = abc.ABC
else:
import ConfigParser as configparser
import collections as collections_abc # noqa
class ABC(object):
__metaclass__ = abc.ABCMeta
# late imports
fixtures = None
engines = None
exclusions = None
warnings = None
profiling = None
provision = None
assertions = None
requirements = None
config = None
testing = None
util = None
file_config = None
logging = None
include_tags = set()
exclude_tags = set()
options = None
def setup_options(make_option):
make_option(
"--log-info",
action="callback",
type="string",
callback=_log,
help="turn on info logging for <LOG> (multiple OK)",
)
make_option(
"--log-debug",
action="callback",
type="string",
callback=_log,
help="turn on debug logging for <LOG> (multiple OK)",
)
make_option(
"--db",
action="append",
type="string",
dest="db",
help="Use prefab database uri. Multiple OK, "
"first one is run by default.",
)
make_option(
"--dbs",
action="callback",
zeroarg_callback=_list_dbs,
help="List available prefab dbs",
)
make_option(
"--dburi",
action="append",
type="string",
dest="dburi",
help="Database uri. Multiple OK, " "first one is run by default.",
)
make_option(
"--dropfirst",
action="store_true",
dest="dropfirst",
help="Drop all tables in the target database first",
)
make_option(
"--backend-only",
action="store_true",
dest="backend_only",
help="Run only tests marked with __backend__ or __sparse_backend__",
)
make_option(
"--nomemory",
action="store_true",
dest="nomemory",
help="Don't run memory profiling tests",
)
make_option(
"--postgresql-templatedb",
type="string",
help="name of template database to use for PostgreSQL "
"CREATE DATABASE (defaults to current database)",
)
make_option(
"--low-connections",
action="store_true",
dest="low_connections",
help="Use a low number of distinct connections - "
"i.e. for Oracle TNS",
)
make_option(
"--write-idents",
type="string",
dest="write_idents",
help="write out generated follower idents to <file>, "
"when -n<num> is used",
)
make_option(
"--reversetop",
action="store_true",
dest="reversetop",
default=False,
help="Use a random-ordering set implementation in the ORM "
"(helps reveal dependency issues)",
)
make_option(
"--requirements",
action="callback",
type="string",
callback=_requirements_opt,
help="requirements class for testing, overrides setup.cfg",
)
make_option(
"--with-cdecimal",
action="store_true",
dest="cdecimal",
default=False,
help="Monkeypatch the cdecimal library into Python 'decimal' "
"for all tests",
)
make_option(
"--include-tag",
action="callback",
callback=_include_tag,
type="string",
help="Include tests with tag <tag>",
)
make_option(
"--exclude-tag",
action="callback",
callback=_exclude_tag,
type="string",
help="Exclude tests with tag <tag>",
)
make_option(
"--write-profiles",
action="store_true",
dest="write_profiles",
default=False,
help="Write/update failing profiling data.",
)
make_option(
"--force-write-profiles",
action="store_true",
dest="force_write_profiles",
default=False,
help="Unconditionally write/update profiling data.",
)
def configure_follower(follower_ident):
"""Configure required state for a follower.
This invokes in the parent process and typically includes
database creation.
"""
from sqlalchemy.testing import provision
provision.FOLLOWER_IDENT = follower_ident
def memoize_important_follower_config(dict_):
"""Store important configuration we will need to send to a follower.
This invokes in the parent process after normal config is set up.
This is necessary as pytest seems to not be using forking, so we
start with nothing in memory, *but* it isn't running our argparse
callables, so we have to just copy all of that over.
"""
dict_["memoized_config"] = {
"include_tags": include_tags,
"exclude_tags": exclude_tags,
}
def restore_important_follower_config(dict_):
"""Restore important configuration needed by a follower.
This invokes in the follower process.
"""
global include_tags, exclude_tags
include_tags.update(dict_["memoized_config"]["include_tags"])
exclude_tags.update(dict_["memoized_config"]["exclude_tags"])
def read_config():
global file_config
file_config = configparser.ConfigParser()
file_config.read(["setup.cfg", "test.cfg"])
def pre_begin(opt):
"""things to set up early, before coverage might be setup."""
global options
options = opt
for fn in pre_configure:
fn(options, file_config)
def set_coverage_flag(value):
options.has_coverage = value
def post_begin():
"""things to set up later, once we know coverage is running."""
# Lazy setup of other options (post coverage)
for fn in post_configure:
fn(options, file_config)
# late imports, has to happen after config.
global util, fixtures, engines, exclusions, assertions, provision
global warnings, profiling, config, testing
from sqlalchemy import testing # noqa
from sqlalchemy.testing import fixtures, engines, exclusions # noqa
from sqlalchemy.testing import assertions, warnings, profiling # noqa
from sqlalchemy.testing import config, provision # noqa
from sqlalchemy import util # noqa
warnings.setup_filters()
def _log(opt_str, value, parser):
global logging
if not logging:
import logging
logging.basicConfig()
if opt_str.endswith("-info"):
logging.getLogger(value).setLevel(logging.INFO)
elif opt_str.endswith("-debug"):
logging.getLogger(value).setLevel(logging.DEBUG)
def _list_dbs(*args):
print("Available --db options (use --dburi to override)")
for macro in sorted(file_config.options("db")):
print("%20s\t%s" % (macro, file_config.get("db", macro)))
sys.exit(0)
def _requirements_opt(opt_str, value, parser):
_setup_requirements(value)
def _exclude_tag(opt_str, value, parser):
exclude_tags.add(value.replace("-", "_"))
def _include_tag(opt_str, value, parser):
include_tags.add(value.replace("-", "_"))
pre_configure = []
post_configure = []
def pre(fn):
pre_configure.append(fn)
return fn
def post(fn):
post_configure.append(fn)
return fn
@pre
def _setup_options(opt, file_config):
global options
options = opt
@pre
def _set_nomemory(opt, file_config):
if opt.nomemory:
exclude_tags.add("memory_intensive")
@pre
def _monkeypatch_cdecimal(options, file_config):
if options.cdecimal:
import cdecimal
sys.modules["decimal"] = cdecimal
@post
def _init_symbols(options, file_config):
from sqlalchemy.testing import config
config._fixture_functions = _fixture_fn_class()
@post
def _engine_uri(options, file_config):
from sqlalchemy.testing import config
from sqlalchemy import testing
from sqlalchemy.testing import provision
if options.dburi:
db_urls = list(options.dburi)
else:
db_urls = []
if options.db:
for db_token in options.db:
for db in re.split(r"[,\s]+", db_token):
if db not in file_config.options("db"):
raise RuntimeError(
"Unknown URI specifier '%s'. "
"Specify --dbs for known uris." % db
)
else:
db_urls.append(file_config.get("db", db))
if not db_urls:
db_urls.append(file_config.get("db", "default"))
config._current = None
for db_url in db_urls:
if options.write_idents and provision.FOLLOWER_IDENT: # != 'master':
with open(options.write_idents, "a") as file_:
file_.write(provision.FOLLOWER_IDENT + " " + db_url + "\n")
cfg = provision.setup_config(
db_url, options, file_config, provision.FOLLOWER_IDENT
)
if not config._current:
cfg.set_as_current(cfg, testing)
@post
def _requirements(options, file_config):
requirement_cls = file_config.get("sqla_testing", "requirement_cls")
_setup_requirements(requirement_cls)
def _setup_requirements(argument):
from sqlalchemy.testing import config
from sqlalchemy import testing
if config.requirements is not None:
return
modname, clsname = argument.split(":")
# importlib.import_module() only introduced in 2.7, a little
# late
mod = __import__(modname)
for component in modname.split(".")[1:]:
mod = getattr(mod, component)
req_cls = getattr(mod, clsname)
config.requirements = testing.requires = req_cls()
@post
def _prep_testing_database(options, file_config):
from sqlalchemy.testing import config, util
from sqlalchemy.testing.exclusions import against
from sqlalchemy import schema, inspect
if options.dropfirst:
for cfg in config.Config.all_configs():
e = cfg.db
inspector = inspect(e)
try:
view_names = inspector.get_view_names()
except NotImplementedError:
pass
else:
for vname in view_names:
e.execute(
schema._DropView(
schema.Table(vname, schema.MetaData())
)
)
if config.requirements.schemas.enabled_for_config(cfg):
try:
view_names = inspector.get_view_names(schema="test_schema")
except NotImplementedError:
pass
else:
for vname in view_names:
e.execute(
schema._DropView(
schema.Table(
vname,
schema.MetaData(),
schema="test_schema",
)
)
)
util.drop_all_tables(e, inspector)
if config.requirements.schemas.enabled_for_config(cfg):
util.drop_all_tables(e, inspector, schema=cfg.test_schema)
if against(cfg, "postgresql"):
from sqlalchemy.dialects import postgresql
for enum in inspector.get_enums("*"):
e.execute(
postgresql.DropEnumType(
postgresql.ENUM(
name=enum["name"], schema=enum["schema"]
)
)
)
@post
def _reverse_topological(options, file_config):
if options.reversetop:
from sqlalchemy.orm.util import randomize_unitofwork
randomize_unitofwork()
@post
def _post_setup_options(opt, file_config):
from sqlalchemy.testing import config
config.options = options
config.file_config = file_config
@post
def _setup_profiling(options, file_config):
from sqlalchemy.testing import profiling
profiling._profile_stats = profiling.ProfileStatsFile(
file_config.get("sqla_testing", "profile_file")
)
def want_class(name, cls):
if not issubclass(cls, fixtures.TestBase):
return False
elif name.startswith("_"):
return False
elif (
config.options.backend_only
and not getattr(cls, "__backend__", False)
and not getattr(cls, "__sparse_backend__", False)
):
return False
else:
return True
def want_method(cls, fn):
if not fn.__name__.startswith("test_"):
return False
elif fn.__module__ is None:
return False
elif include_tags:
return (
hasattr(cls, "__tags__")
and exclusions.tags(cls.__tags__).include_test(
include_tags, exclude_tags
)
) or (
hasattr(fn, "_sa_exclusion_extend")
and fn._sa_exclusion_extend.include_test(
include_tags, exclude_tags
)
)
elif exclude_tags and hasattr(cls, "__tags__"):
return exclusions.tags(cls.__tags__).include_test(
include_tags, exclude_tags
)
elif exclude_tags and hasattr(fn, "_sa_exclusion_extend"):
return fn._sa_exclusion_extend.include_test(include_tags, exclude_tags)
else:
return True
def generate_sub_tests(cls, module):
if getattr(cls, "__backend__", False) or getattr(
cls, "__sparse_backend__", False
):
sparse = getattr(cls, "__sparse_backend__", False)
for cfg in _possible_configs_for_cls(cls, sparse=sparse):
orig_name = cls.__name__
# we can have special chars in these names except for the
# pytest junit plugin, which is tripped up by the brackets
# and periods, so sanitize
alpha_name = re.sub(r"[_\[\]\.]+", "_", cfg.name)
alpha_name = re.sub(r"_+$", "", alpha_name)
name = "%s_%s" % (cls.__name__, alpha_name)
subcls = type(
name,
(cls,),
{"_sa_orig_cls_name": orig_name, "__only_on_config__": cfg},
)
setattr(module, name, subcls)
yield subcls
else:
yield cls
def start_test_class(cls):
_do_skips(cls)
_setup_engine(cls)
def stop_test_class(cls):
# from sqlalchemy import inspect
# assert not inspect(testing.db).get_table_names()
provision.stop_test_class(config, config.db, cls)
engines.testing_reaper._stop_test_ctx()
try:
if not options.low_connections:
assertions.global_cleanup_assertions()
finally:
_restore_engine()
def _restore_engine():
config._current.reset(testing)
def final_process_cleanup():
engines.testing_reaper._stop_test_ctx_aggressive()
assertions.global_cleanup_assertions()
_restore_engine()
def _setup_engine(cls):
if getattr(cls, "__engine_options__", None):
eng = engines.testing_engine(options=cls.__engine_options__)
config._current.push_engine(eng, testing)
def before_test(test, test_module_name, test_class, test_name):
# format looks like:
# "test.aaa_profiling.test_compiler.CompileTest.test_update_whereclause"
name = getattr(test_class, "_sa_orig_cls_name", test_class.__name__)
id_ = "%s.%s.%s" % (test_module_name, name, test_name)
profiling._current_test = id_
def after_test(test):
engines.testing_reaper._after_test_ctx()
def _possible_configs_for_cls(cls, reasons=None, sparse=False):
all_configs = set(config.Config.all_configs())
if cls.__unsupported_on__:
spec = exclusions.db_spec(*cls.__unsupported_on__)
for config_obj in list(all_configs):
if spec(config_obj):
all_configs.remove(config_obj)
if getattr(cls, "__only_on__", None):
spec = exclusions.db_spec(*util.to_list(cls.__only_on__))
for config_obj in list(all_configs):
if not spec(config_obj):
all_configs.remove(config_obj)
if getattr(cls, "__only_on_config__", None):
all_configs.intersection_update([cls.__only_on_config__])
if hasattr(cls, "__requires__"):
requirements = config.requirements
for config_obj in list(all_configs):
for requirement in cls.__requires__:
check = getattr(requirements, requirement)
skip_reasons = check.matching_config_reasons(config_obj)
if skip_reasons:
all_configs.remove(config_obj)
if reasons is not None:
reasons.extend(skip_reasons)
break
if hasattr(cls, "__prefer_requires__"):
non_preferred = set()
requirements = config.requirements
for config_obj in list(all_configs):
for requirement in cls.__prefer_requires__:
check = getattr(requirements, requirement)
if not check.enabled_for_config(config_obj):
non_preferred.add(config_obj)
if all_configs.difference(non_preferred):
all_configs.difference_update(non_preferred)
if sparse:
# pick only one config from each base dialect
# sorted so we get the same backend each time selecting the highest
# server version info.
per_dialect = {}
for cfg in reversed(
sorted(
all_configs,
key=lambda cfg: (
cfg.db.name,
cfg.db.dialect.server_version_info,
),
)
):
db = cfg.db.name
if db not in per_dialect:
per_dialect[db] = cfg
return per_dialect.values()
return all_configs
def _do_skips(cls):
reasons = []
all_configs = _possible_configs_for_cls(cls, reasons)
if getattr(cls, "__skip_if__", False):
for c in getattr(cls, "__skip_if__"):
if c():
config.skip_test(
"'%s' skipped by %s" % (cls.__name__, c.__name__)
)
if not all_configs:
msg = "'%s' unsupported on any DB implementation %s%s" % (
cls.__name__,
", ".join(
"'%s(%s)+%s'"
% (
config_obj.db.name,
".".join(
str(dig)
for dig in exclusions._server_version(config_obj.db)
),
config_obj.db.driver,
)
for config_obj in config.Config.all_configs()
),
", ".join(reasons),
)
config.skip_test(msg)
elif hasattr(cls, "__prefer_backends__"):
non_preferred = set()
spec = exclusions.db_spec(*util.to_list(cls.__prefer_backends__))
for config_obj in all_configs:
if not spec(config_obj):
non_preferred.add(config_obj)
if all_configs.difference(non_preferred):
all_configs.difference_update(non_preferred)
if config._current not in all_configs:
_setup_config(all_configs.pop(), cls)
def _setup_config(config_obj, ctx):
config._current.push(config_obj, testing)
class FixtureFunctions(ABC):
@abc.abstractmethod
def skip_test_exception(self, *arg, **kw):
raise NotImplementedError()
@abc.abstractmethod
def combinations(self, *args, **kw):
raise NotImplementedError()
@abc.abstractmethod
def param_ident(self, *args, **kw):
raise NotImplementedError()
@abc.abstractmethod
def fixture(self, *arg, **kw):
raise NotImplementedError()
def get_current_test_name(self):
raise NotImplementedError()
_fixture_fn_class = None
def set_fixture_functions(fixture_fn_class):
global _fixture_fn_class
_fixture_fn_class = fixture_fn_class
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