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import os
import re
import shutil
import sys
import tempfile
from sqlalchemy import testing
from sqlalchemy.testing import config
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
class MypyPluginTest(fixtures.TestBase):
__requires__ = ("sqlalchemy2_stubs",)
@testing.fixture(scope="function")
def per_func_cachedir(self):
for item in self._cachedir():
yield item
@testing.fixture(scope="class")
def cachedir(self):
for item in self._cachedir():
yield item
def _cachedir(self):
with tempfile.TemporaryDirectory() as cachedir:
with open(
os.path.join(cachedir, "sqla_mypy_config.cfg"), "w"
) as config_file:
config_file.write(
"""
[mypy]\n
plugins = sqlalchemy.ext.mypy.plugin\n
"""
)
with open(
os.path.join(cachedir, "plain_mypy_config.cfg"), "w"
) as config_file:
config_file.write(
"""
[mypy]\n
"""
)
yield cachedir
@testing.fixture()
def mypy_runner(self, cachedir):
from mypy import api
def run(path, use_plugin=True, incremental=False):
args = [
"--strict",
"--raise-exceptions",
"--cache-dir",
cachedir,
"--config-file",
os.path.join(
cachedir,
"sqla_mypy_config.cfg"
if use_plugin
else "plain_mypy_config.cfg",
),
]
if incremental:
args.append(path)
else:
# mypy as of 0.990 is more aggressively blocking messaging
# for paths that are in sys.path, and as pytest puts currdir,
# test/ etc in sys.path, just copy the source file to the
# tempdir we are working in so that we don't have to try to
# manipulate sys.path and/or guess what mypy is doing
filename = os.path.basename(path)
test_program = os.path.join(cachedir, filename)
shutil.copyfile(path, test_program)
args.append(test_program)
result = api.run(args)
return result
return run
def _incremental_dirs():
path = os.path.join(os.path.dirname(__file__), "incremental")
files = []
for d in os.listdir(path):
if os.path.isdir(os.path.join(path, d)):
files.append(
os.path.join(os.path.dirname(__file__), "incremental", d)
)
for extra_dir in testing.config.options.mypy_extra_test_paths:
if extra_dir and os.path.isdir(extra_dir):
for d in os.listdir(os.path.join(extra_dir, "incremental")):
if os.path.isdir(os.path.join(path, d)):
files.append(os.path.join(extra_dir, "incremental", d))
return files
@testing.combinations(
*[(pathname,) for pathname in _incremental_dirs()], argnames="pathname"
)
@testing.requires.patch_library
def test_incremental(self, mypy_runner, per_func_cachedir, pathname):
import patch
cachedir = per_func_cachedir
dest = os.path.join(cachedir, "mymodel")
os.mkdir(dest)
patches = set()
print("incremental test: %s" % pathname)
for fname in os.listdir(pathname):
if fname.endswith(".py"):
shutil.copy(
os.path.join(pathname, fname), os.path.join(dest, fname)
)
print("copying to: %s" % os.path.join(dest, fname))
elif fname.endswith(".testpatch"):
patches.add(fname)
for patchfile in [None] + sorted(patches):
if patchfile is not None:
print("Applying patchfile %s" % patchfile)
patch_obj = patch.fromfile(os.path.join(pathname, patchfile))
assert patch_obj.apply(1, dest), (
"pathfile %s failed" % patchfile
)
print("running mypy against %s" % dest)
result = mypy_runner(
dest,
use_plugin=True,
incremental=True,
)
eq_(
result[2],
0,
msg="Failure after applying patch %s: %s"
% (patchfile, result[0]),
)
def _file_combinations():
path = os.path.join(os.path.dirname(__file__), "files")
files = []
for f in os.listdir(path):
if f.endswith(".py"):
files.append(
os.path.join(os.path.dirname(__file__), "files", f)
)
for extra_dir in testing.config.options.mypy_extra_test_paths:
if extra_dir and os.path.isdir(extra_dir):
for f in os.listdir(os.path.join(extra_dir, "files")):
if f.endswith(".py"):
files.append(os.path.join(extra_dir, "files", f))
return files
@testing.combinations(
*[(filename,) for filename in _file_combinations()], argnames="path"
)
def test_mypy(self, mypy_runner, path):
filename = os.path.basename(path)
use_plugin = True
expected_errors = []
expected_re = re.compile(r"\s*# EXPECTED(_MYPY)?: (.+)")
py_ver_re = re.compile(r"^#\s*PYTHON_VERSION\s?>=\s?(\d+\.\d+)")
with open(path) as file_:
for num, line in enumerate(file_, 1):
m = py_ver_re.match(line)
if m:
major, _, minor = m.group(1).partition(".")
if sys.version_info < (int(major), int(minor)):
config.skip_test(
"Requires python >= %s" % (m.group(1))
)
continue
if line.startswith("# NOPLUGINS"):
use_plugin = False
continue
m = expected_re.match(line)
if m:
is_mypy = bool(m.group(1))
expected_msg = m.group(2)
expected_msg = re.sub(r"# noqa[:]? ?.*", "", m.group(2))
expected_errors.append(
(num, is_mypy, expected_msg.strip())
)
result = mypy_runner(path, use_plugin=use_plugin)
not_located = []
if expected_errors:
# mypy 0.990 changed how return codes work, so don't assume a
# 1 or a 0 return code here, could be either depending on if
# errors were generated or not
print(result[0])
errors = []
for e in result[0].split("\n"):
if re.match(r".+\.py:\d+: error: .*", e):
errors.append(e)
for num, is_mypy, msg in expected_errors:
msg = msg.replace("'", '"')
prefix = "[SQLAlchemy Mypy plugin] " if not is_mypy else ""
for idx, errmsg in enumerate(errors):
if (
f"{filename}:{num + 1}: error: {prefix}{msg}"
in errmsg.replace("'", '"')
):
break
else:
not_located.append(msg)
continue
del errors[idx]
if not_located:
print(f"Couldn't locate expected messages: {not_located}")
assert False, "expected messages not found, see stdout"
assert not errors, "errors remain: %s" % "\n".join(errors)
else:
eq_(result[2], 0, msg=result)
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