212 lines
8.0 KiB
Python
212 lines
8.0 KiB
Python
from contextlib import contextmanager
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import filelock
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import os
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import pytest
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import re
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import subprocess
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from subprocess import PIPE
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import sys
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import tempfile
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from typing import Tuple, List, Generator
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import mypy.api
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from mypy.test.config import package_path, pip_lock, pip_timeout
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from mypy.util import try_find_python2_interpreter
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from mypy.test.data import DataDrivenTestCase, DataSuite
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from mypy.test.config import test_temp_dir
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from mypy.test.helpers import assert_string_arrays_equal, perform_file_operations
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# NOTE: options.use_builtins_fixtures should not be set in these
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# tests, otherwise mypy will ignore installed third-party packages.
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class PEP561Suite(DataSuite):
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files = [
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'pep561.test',
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]
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base_path = '.'
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def run_case(self, test_case: DataDrivenTestCase) -> None:
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test_pep561(test_case)
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@contextmanager
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def virtualenv(
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python_executable: str = sys.executable
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) -> Generator[Tuple[str, str], None, None]:
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"""Context manager that creates a virtualenv in a temporary directory
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returns the path to the created Python executable"""
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# Sadly, we need virtualenv, as the Python 3 venv module does not support creating a venv
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# for Python 2, and Python 2 does not have its own venv.
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with tempfile.TemporaryDirectory() as venv_dir:
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proc = subprocess.run([sys.executable,
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'-m',
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'virtualenv',
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f'-p{python_executable}',
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venv_dir], cwd=os.getcwd(), stdout=PIPE, stderr=PIPE)
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if proc.returncode != 0:
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err = proc.stdout.decode('utf-8') + proc.stderr.decode('utf-8')
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raise Exception("Failed to create venv. Do you have virtualenv installed?\n" + err)
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if sys.platform == 'win32':
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yield venv_dir, os.path.abspath(os.path.join(venv_dir, 'Scripts', 'python'))
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else:
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yield venv_dir, os.path.abspath(os.path.join(venv_dir, 'bin', 'python'))
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def install_package(pkg: str,
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python_executable: str = sys.executable,
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use_pip: bool = True,
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editable: bool = False) -> None:
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"""Install a package from test-data/packages/pkg/"""
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working_dir = os.path.join(package_path, pkg)
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with tempfile.TemporaryDirectory() as dir:
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if use_pip:
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install_cmd = [python_executable, '-m', 'pip', 'install']
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if editable:
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install_cmd.append('-e')
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install_cmd.append('.')
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else:
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install_cmd = [python_executable, 'setup.py']
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if editable:
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install_cmd.append('develop')
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else:
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install_cmd.append('install')
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# Note that newer versions of pip (21.3+) don't
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# follow this env variable, but this is for compatibility
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env = {'PIP_BUILD': dir}
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# Inherit environment for Windows
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env.update(os.environ)
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try:
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with filelock.FileLock(pip_lock, timeout=pip_timeout):
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proc = subprocess.run(install_cmd,
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cwd=working_dir,
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stdout=PIPE,
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stderr=PIPE,
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env=env)
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except filelock.Timeout as err:
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raise Exception("Failed to acquire {}".format(pip_lock)) from err
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if proc.returncode != 0:
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raise Exception(proc.stdout.decode('utf-8') + proc.stderr.decode('utf-8'))
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def test_pep561(testcase: DataDrivenTestCase) -> None:
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"""Test running mypy on files that depend on PEP 561 packages."""
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assert testcase.old_cwd is not None, "test was not properly set up"
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if 'python2' in testcase.name.lower():
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python = try_find_python2_interpreter()
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if python is None:
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pytest.skip()
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else:
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python = sys.executable
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assert python is not None, "Should be impossible"
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pkgs, pip_args = parse_pkgs(testcase.input[0])
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mypy_args = parse_mypy_args(testcase.input[1])
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use_pip = True
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editable = False
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for arg in pip_args:
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if arg == 'no-pip':
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use_pip = False
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elif arg == 'editable':
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editable = True
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assert pkgs != [], "No packages to install for PEP 561 test?"
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with virtualenv(python) as venv:
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venv_dir, python_executable = venv
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for pkg in pkgs:
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install_package(pkg, python_executable, use_pip, editable)
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cmd_line = list(mypy_args)
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has_program = not ('-p' in cmd_line or '--package' in cmd_line)
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if has_program:
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program = testcase.name + '.py'
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with open(program, 'w', encoding='utf-8') as f:
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for s in testcase.input:
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f.write(f'{s}\n')
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cmd_line.append(program)
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cmd_line.extend(['--no-error-summary'])
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if python_executable != sys.executable:
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cmd_line.append(f'--python-executable={python_executable}')
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steps = testcase.find_steps()
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if steps != [[]]:
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steps = [[]] + steps # type: ignore[operator,assignment]
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for i, operations in enumerate(steps):
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perform_file_operations(operations)
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output = []
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# Type check the module
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out, err, returncode = mypy.api.run(cmd_line)
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# split lines, remove newlines, and remove directory of test case
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for line in (out + err).splitlines():
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if line.startswith(test_temp_dir + os.sep):
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output.append(line[len(test_temp_dir + os.sep):].rstrip("\r\n"))
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else:
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# Normalize paths so that the output is the same on Windows and Linux/macOS.
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line = line.replace(test_temp_dir + os.sep, test_temp_dir + '/')
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output.append(line.rstrip("\r\n"))
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iter_count = '' if i == 0 else f' on iteration {i + 1}'
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expected = testcase.output if i == 0 else testcase.output2.get(i + 1, [])
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assert_string_arrays_equal(expected, output,
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'Invalid output ({}, line {}){}'.format(
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testcase.file, testcase.line, iter_count))
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if has_program:
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os.remove(program)
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def parse_pkgs(comment: str) -> Tuple[List[str], List[str]]:
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if not comment.startswith('# pkgs:'):
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return ([], [])
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else:
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pkgs_str, *args = comment[7:].split(';')
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return ([pkg.strip() for pkg in pkgs_str.split(',')], [arg.strip() for arg in args])
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def parse_mypy_args(line: str) -> List[str]:
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m = re.match('# flags: (.*)$', line)
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if not m:
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return [] # No args; mypy will spit out an error.
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return m.group(1).split()
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def test_mypy_path_is_respected() -> None:
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assert False
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packages = 'packages'
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pkg_name = 'a'
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with tempfile.TemporaryDirectory() as temp_dir:
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old_dir = os.getcwd()
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os.chdir(temp_dir)
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try:
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# Create the pkg for files to go into
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full_pkg_name = os.path.join(temp_dir, packages, pkg_name)
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os.makedirs(full_pkg_name)
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# Create the empty __init__ file to declare a package
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pkg_init_name = os.path.join(temp_dir, packages, pkg_name, '__init__.py')
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open(pkg_init_name, 'w', encoding='utf8').close()
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mypy_config_path = os.path.join(temp_dir, 'mypy.ini')
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with open(mypy_config_path, 'w') as mypy_file:
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mypy_file.write('[mypy]\n')
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mypy_file.write(f'mypy_path = ./{packages}\n')
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with virtualenv() as venv:
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venv_dir, python_executable = venv
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cmd_line_args = []
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if python_executable != sys.executable:
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cmd_line_args.append(f'--python-executable={python_executable}')
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cmd_line_args.extend(['--config-file', mypy_config_path,
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'--package', pkg_name])
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out, err, returncode = mypy.api.run(cmd_line_args)
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assert returncode == 0
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finally:
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os.chdir(old_dir)
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