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"""Tests for distutils.spawn."""
import os
import stat
import sys
import unittest.mock
from test.support import run_unittest, unix_shell
from test import support as test_support
from distutils.spawn import find_executable
from distutils.spawn import spawn
from distutils.errors import DistutilsExecError
from distutils.tests import support
class SpawnTestCase(support.TempdirManager,
support.LoggingSilencer,
unittest.TestCase):
@unittest.skipUnless(os.name in ('nt', 'posix'),
'Runs only under posix or nt')
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, '#!%s\nexit 1' % unix_shell)
else:
exe = os.path.join(tmpdir, 'foo.bat')
self.write_file(exe, 'exit 1')
os.chmod(exe, 0o777)
self.assertRaises(DistutilsExecError, spawn, [exe])
# now something that works
if sys.platform != 'win32':
exe = os.path.join(tmpdir, 'foo.sh')
self.write_file(exe, '#!%s\nexit 0' % unix_shell)
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):
with test_support.temp_dir() as tmp_dir:
# use TESTFN to get a pseudo-unique filename
program_noeext = test_support.TESTFN
# Give the temporary program an ".exe" suffix for all.
# It's needed on Windows and not harmful on other platforms.
program = program_noeext + ".exe"
filename = os.path.join(tmp_dir, program)
with open(filename, "wb"):
pass
os.chmod(filename, stat.S_IXUSR)
# test path parameter
rv = find_executable(program, path=tmp_dir)
self.assertEqual(rv, filename)
if sys.platform == 'win32':
# test without ".exe" extension
rv = find_executable(program_noeext, path=tmp_dir)
self.assertEqual(rv, filename)
# test find in the current directory
with test_support.change_cwd(tmp_dir):
rv = find_executable(program)
self.assertEqual(rv, program)
# test non-existent program
dont_exist_program = "dontexist_" + program
rv = find_executable(dont_exist_program , path=tmp_dir)
self.assertIsNone(rv)
# PATH='': no match, except in the current directory
with test_support.EnvironmentVarGuard() as env:
env['PATH'] = ''
with unittest.mock.patch('distutils.spawn.os.confstr',
return_value=tmp_dir, create=True), \
unittest.mock.patch('distutils.spawn.os.defpath',
tmp_dir):
rv = find_executable(program)
self.assertIsNone(rv)
# look in current directory
with test_support.change_cwd(tmp_dir):
rv = find_executable(program)
self.assertEqual(rv, program)
# PATH=':': explicitly looks in the current directory
with test_support.EnvironmentVarGuard() as env:
env['PATH'] = os.pathsep
with unittest.mock.patch('distutils.spawn.os.confstr',
return_value='', create=True), \
unittest.mock.patch('distutils.spawn.os.defpath', ''):
rv = find_executable(program)
self.assertIsNone(rv)
# look in current directory
with test_support.change_cwd(tmp_dir):
rv = find_executable(program)
self.assertEqual(rv, program)
# missing PATH: test os.confstr("CS_PATH") and os.defpath
with test_support.EnvironmentVarGuard() as env:
env.pop('PATH', None)
# without confstr
with unittest.mock.patch('distutils.spawn.os.confstr',
side_effect=ValueError,
create=True), \
unittest.mock.patch('distutils.spawn.os.defpath',
tmp_dir):
rv = find_executable(program)
self.assertEqual(rv, filename)
# with confstr
with unittest.mock.patch('distutils.spawn.os.confstr',
return_value=tmp_dir, create=True), \
unittest.mock.patch('distutils.spawn.os.defpath', ''):
rv = find_executable(program)
self.assertEqual(rv, filename)
def test_spawn_missing_exe(self):
with self.assertRaises(DistutilsExecError) as ctx:
spawn(['does-not-exist'])
self.assertIn("command 'does-not-exist' failed", str(ctx.exception))
def test_suite():
return unittest.makeSuite(SpawnTestCase)
if __name__ == "__main__":
run_unittest(test_suite())
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