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# Copyright (c) 2006-2010, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2012 FELD Boris <lothiraldan@gmail.com>
# Copyright (c) 2013-2014 Google, Inc.
# Copyright (c) 2014-2020 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2014 Michal Nowikowski <godfryd@gmail.com>
# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
# Copyright (c) 2016 Derek Gustafson <degustaf@gmail.com>
# Copyright (c) 2017 Michka Popoff <michkapopoff@gmail.com>
# Copyright (c) 2019-2021 Pierre Sassoulas <pierre.sassoulas@gmail.com>
# Copyright (c) 2019 Hugo van Kemenade <hugovk@users.noreply.github.com>
# Copyright (c) 2019 Ashley Whetter <ashley@awhetter.co.uk>
# Copyright (c) 2020 hippo91 <guillaume.peillex@gmail.com>
# Copyright (c) 2020 Anthony Sottile <asottile@umich.edu>
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
"""functional/non regression tests for pylint"""
import re
import sys
from os.path import abspath, dirname, join
import pytest
from pylint.testutils import UPDATE_FILE, UPDATE_OPTION, _get_tests_info, linter
INPUT_DIR = join(dirname(abspath(__file__)), "input")
MSG_DIR = join(dirname(abspath(__file__)), "messages")
FILTER_RGX = None
INFO_TEST_RGX = re.compile(r"^func_i\d\d\d\d$")
def exception_str(self, ex): # pylint: disable=unused-argument
"""function used to replace default __str__ method of exception instances"""
return "in {}\n:: {}".format(ex.file, ", ".join(ex.args))
class LintTestUsingModule:
INPUT_DIR = None
DEFAULT_PACKAGE = "input"
package = DEFAULT_PACKAGE
linter = linter
module = None
depends = None
output = None
def _test_functionality(self):
tocheck = [self.package + "." + self.module]
# pylint: disable=not-an-iterable; can't handle boolean checks for now
if self.depends:
tocheck += [
self.package + ".%s" % name.replace(".py", "")
for name, _ in self.depends
]
self._test(tocheck)
def _check_result(self, got):
error_msg = (
f"Wrong output for '{self.output}':\n"
"You can update the expected output automatically with: '"
f"python tests/test_func.py {UPDATE_OPTION}'\n\n"
)
assert self._get_expected() == got, error_msg
def _test(self, tocheck):
if INFO_TEST_RGX.match(self.module):
self.linter.enable("I")
else:
self.linter.disable("I")
try:
self.linter.check(tocheck)
except Exception as ex:
# need finalization to restore a correct state
self.linter.reporter.finalize()
ex.file = tocheck
print(ex)
ex.__str__ = exception_str
raise
self._check_result(self.linter.reporter.finalize())
def _has_output(self):
return not self.module.startswith("func_noerror_")
def _get_expected(self):
if self._has_output() and self.output:
with open(self.output) as fobj:
return fobj.read().strip() + "\n"
else:
return ""
class LintTestUpdate(LintTestUsingModule):
def _check_result(self, got):
if not self._has_output():
return
try:
expected = self._get_expected()
except OSError:
expected = ""
if got != expected:
with open(self.output, "w") as f:
f.write(got)
def gen_tests(filter_rgx):
if filter_rgx:
is_to_run = re.compile(filter_rgx).search
else:
is_to_run = lambda x: 1 # noqa: E731 We're going to throw all this anyway
tests = []
for module_file, messages_file in _get_tests_info(INPUT_DIR, MSG_DIR, "func_", ""):
if not is_to_run(module_file) or module_file.endswith((".pyc", "$py.class")):
continue
base = module_file.replace(".py", "").split("_")[1]
dependencies = _get_tests_info(INPUT_DIR, MSG_DIR, base, ".py")
tests.append((module_file, messages_file, dependencies))
if UPDATE_FILE.exists():
return tests
assert len(tests) < 19, "Please do not add new test cases here."
return tests
TEST_WITH_EXPECTED_DEPRECATION = ["func_excess_escapes.py"]
@pytest.mark.parametrize(
"module_file,messages_file,dependencies",
gen_tests(FILTER_RGX),
ids=[o[0] for o in gen_tests(FILTER_RGX)],
)
def test_functionality(module_file, messages_file, dependencies, recwarn):
__test_functionality(module_file, messages_file, dependencies)
warning = None
try:
# Catch <unknown>:x: DeprecationWarning: invalid escape sequence
# so it's not shown during tests
warning = recwarn.pop()
except AssertionError:
pass
if warning is not None:
if module_file in TEST_WITH_EXPECTED_DEPRECATION and sys.version_info.minor > 5:
assert issubclass(warning.category, DeprecationWarning)
assert "invalid escape sequence" in str(warning.message)
def __test_functionality(module_file, messages_file, dependencies):
lint_test = LintTestUpdate() if UPDATE_FILE.exists() else LintTestUsingModule()
lint_test.module = module_file.replace(".py", "")
lint_test.output = messages_file
lint_test.depends = dependencies or None
lint_test.INPUT_DIR = INPUT_DIR
lint_test._test_functionality()
if __name__ == "__main__":
if UPDATE_OPTION in sys.argv:
UPDATE_FILE.touch()
sys.argv.remove(UPDATE_OPTION)
if len(sys.argv) > 1:
FILTER_RGX = sys.argv[1]
del sys.argv[1]
try:
pytest.main(sys.argv)
finally:
if UPDATE_FILE.exists():
UPDATE_FILE.unlink()
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