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test_spawn.py
"""Tests for distutils.spawn.""" import os import stat import sys import unittest.mock as mock from distutils.errors import DistutilsExecError from distutils.spawn import find_executable, spawn from distutils.tests import support import path import pytest from test.support import unix_shell from .compat import py38 as os_helper class TestSpawn(support.TempdirManager): @pytest.mark.skipif("os.name not in ('nt', 'posix')") def test_spawn(self): tmpdir = self.mkdtemp() # creating something executable # through the shell that returns 1 if sys.platform != 'win32': exe = os.path.join(tmpdir, 'foo.sh') self.write_file(exe, f'#!{unix_shell}\nexit 1') else: exe = os.path.join(tmpdir, 'foo.bat') self.write_file(exe, 'exit 1') os.chmod(exe, 0o777) with pytest.raises(DistutilsExecError): spawn([exe]) # now something that works if sys.platform != 'win32': exe = os.path.join(tmpdir, 'foo.sh') self.write_file(exe, f'#!{unix_shell}\nexit 0') else: exe = os.path.join(tmpdir, 'foo.bat') self.write_file(exe, 'exit 0') os.chmod(exe, 0o777) spawn([exe]) # should work without any error def test_find_executable(self, tmp_path): program_path = self._make_executable(tmp_path, '.exe') program = program_path.name program_noeext = program_path.with_suffix('').name filename = str(program_path) tmp_dir = path.Path(tmp_path) # test path parameter rv = find_executable(program, path=tmp_dir) assert rv == filename if sys.platform == 'win32': # test without ".exe" extension rv = find_executable(program_noeext, path=tmp_dir) assert rv == filename # test find in the current directory with tmp_dir: rv = find_executable(program) assert rv == program # test non-existent program dont_exist_program = "dontexist_" + program rv = find_executable(dont_exist_program, path=tmp_dir) assert rv is None # PATH='': no match, except in the current directory with os_helper.EnvironmentVarGuard() as env: env['PATH'] = '' with mock.patch( 'distutils.spawn.os.confstr', return_value=tmp_dir, create=True ), mock.patch('distutils.spawn.os.defpath', tmp_dir): rv = find_executable(program) assert rv is None # look in current directory with tmp_dir: rv = find_executable(program) assert rv == program # PATH=':': explicitly looks in the current directory with os_helper.EnvironmentVarGuard() as env: env['PATH'] = os.pathsep with mock.patch( 'distutils.spawn.os.confstr', return_value='', create=True ), mock.patch('distutils.spawn.os.defpath', ''): rv = find_executable(program) assert rv is None # look in current directory with tmp_dir: rv = find_executable(program) assert rv == program # missing PATH: test os.confstr("CS_PATH") and os.defpath with os_helper.EnvironmentVarGuard() as env: env.pop('PATH', None) # without confstr with mock.patch( 'distutils.spawn.os.confstr', side_effect=ValueError, create=True ), mock.patch('distutils.spawn.os.defpath', tmp_dir): rv = find_executable(program) assert rv == filename # with confstr with mock.patch( 'distutils.spawn.os.confstr', return_value=tmp_dir, create=True ), mock.patch('distutils.spawn.os.defpath', ''): rv = find_executable(program) assert rv == filename @staticmethod def _make_executable(tmp_path, ext): # Give the temporary program a suffix regardless of platform. # It's needed on Windows and not harmful on others. program = tmp_path.joinpath('program').with_suffix(ext) program.write_text("", encoding='utf-8') program.chmod(stat.S_IXUSR) return program def test_spawn_missing_exe(self): with pytest.raises(DistutilsExecError) as ctx: spawn(['does-not-exist']) assert "command 'does-not-exist' failed" in str(ctx.value)
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