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Filename :
test_exec_command.py
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from __future__ import division, absolute_import, print_function import os import sys from tempfile import TemporaryFile from numpy.distutils import exec_command from numpy.distutils.exec_command import get_pythonexe from numpy.testing import TestCase, run_module_suite, tempdir # In python 3 stdout, stderr are text (unicode compliant) devices, so to # emulate them import StringIO from the io module. if sys.version_info[0] >= 3: from io import StringIO else: from StringIO import StringIO class redirect_stdout(object): """Context manager to redirect stdout for exec_command test.""" def __init__(self, stdout=None): self._stdout = stdout or sys.stdout def __enter__(self): self.old_stdout = sys.stdout sys.stdout = self._stdout def __exit__(self, exc_type, exc_value, traceback): self._stdout.flush() sys.stdout = self.old_stdout # note: closing sys.stdout won't close it. self._stdout.close() class redirect_stderr(object): """Context manager to redirect stderr for exec_command test.""" def __init__(self, stderr=None): self._stderr = stderr or sys.stderr def __enter__(self): self.old_stderr = sys.stderr sys.stderr = self._stderr def __exit__(self, exc_type, exc_value, traceback): self._stderr.flush() sys.stderr = self.old_stderr # note: closing sys.stderr won't close it. self._stderr.close() class emulate_nonposix(object): """Context manager to emulate os.name != 'posix' """ def __init__(self, osname='non-posix'): self._new_name = osname def __enter__(self): self._old_name = os.name os.name = self._new_name def __exit__(self, exc_type, exc_value, traceback): os.name = self._old_name def test_exec_command_stdout(): # Regression test for gh-2999 and gh-2915. # There are several packages (nose, scipy.weave.inline, Sage inline # Fortran) that replace stdout, in which case it doesn't have a fileno # method. This is tested here, with a do-nothing command that fails if the # presence of fileno() is assumed in exec_command. # The code has a special case for posix systems, so if we are on posix test # both that the special case works and that the generic code works. # Test posix version: with redirect_stdout(StringIO()): with redirect_stderr(TemporaryFile()): exec_command.exec_command("cd '.'") if os.name == 'posix': # Test general (non-posix) version: with emulate_nonposix(): with redirect_stdout(StringIO()): with redirect_stderr(TemporaryFile()): exec_command.exec_command("cd '.'") def test_exec_command_stderr(): # Test posix version: with redirect_stdout(TemporaryFile(mode='w+')): with redirect_stderr(StringIO()): exec_command.exec_command("cd '.'") if os.name == 'posix': # Test general (non-posix) version: with emulate_nonposix(): with redirect_stdout(TemporaryFile()): with redirect_stderr(StringIO()): exec_command.exec_command("cd '.'") class TestExecCommand(TestCase): def setUp(self): self.pyexe = get_pythonexe() def check_nt(self, **kws): s, o = exec_command.exec_command('cmd /C echo path=%path%') self.assertEqual(s, 0) self.assertNotEqual(o, '') s, o = exec_command.exec_command( '"%s" -c "import sys;sys.stderr.write(sys.platform)"' % self.pyexe) self.assertEqual(s, 0) self.assertEqual(o, 'win32') def check_posix(self, **kws): s, o = exec_command.exec_command("echo Hello", **kws) self.assertEqual(s, 0) self.assertEqual(o, 'Hello') s, o = exec_command.exec_command('echo $AAA', **kws) self.assertEqual(s, 0) self.assertEqual(o, '') s, o = exec_command.exec_command('echo "$AAA"', AAA='Tere', **kws) self.assertEqual(s, 0) self.assertEqual(o, 'Tere') s, o = exec_command.exec_command('echo "$AAA"', **kws) self.assertEqual(s, 0) self.assertEqual(o, '') if 'BBB' not in os.environ: os.environ['BBB'] = 'Hi' s, o = exec_command.exec_command('echo "$BBB"', **kws) self.assertEqual(s, 0) self.assertEqual(o, 'Hi') s, o = exec_command.exec_command('echo "$BBB"', BBB='Hey', **kws) self.assertEqual(s, 0) self.assertEqual(o, 'Hey') s, o = exec_command.exec_command('echo "$BBB"', **kws) self.assertEqual(s, 0) self.assertEqual(o, 'Hi') del os.environ['BBB'] s, o = exec_command.exec_command('echo "$BBB"', **kws) self.assertEqual(s, 0) self.assertEqual(o, '') s, o = exec_command.exec_command('this_is_not_a_command', **kws) self.assertNotEqual(s, 0) self.assertNotEqual(o, '') s, o = exec_command.exec_command('echo path=$PATH', **kws) self.assertEqual(s, 0) self.assertNotEqual(o, '') s, o = exec_command.exec_command( '"%s" -c "import sys,os;sys.stderr.write(os.name)"' % self.pyexe, **kws) self.assertEqual(s, 0) self.assertEqual(o, 'posix') def check_basic(self, *kws): s, o = exec_command.exec_command( '"%s" -c "raise \'Ignore me.\'"' % self.pyexe, **kws) self.assertNotEqual(s, 0) self.assertNotEqual(o, '') s, o = exec_command.exec_command( '"%s" -c "import sys;sys.stderr.write(\'0\');' 'sys.stderr.write(\'1\');sys.stderr.write(\'2\')"' % self.pyexe, **kws) self.assertEqual(s, 0) self.assertEqual(o, '012') s, o = exec_command.exec_command( '"%s" -c "import sys;sys.exit(15)"' % self.pyexe, **kws) self.assertEqual(s, 15) self.assertEqual(o, '') s, o = exec_command.exec_command( '"%s" -c "print(\'Heipa\'")' % self.pyexe, **kws) self.assertEqual(s, 0) self.assertEqual(o, 'Heipa') def check_execute_in(self, **kws): with tempdir() as tmpdir: fn = "file" tmpfile = os.path.join(tmpdir, fn) f = open(tmpfile, 'w') f.write('Hello') f.close() s, o = exec_command.exec_command( '"%s" -c "f = open(\'%s\', \'r\'); f.close()"' % (self.pyexe, fn), **kws) self.assertNotEqual(s, 0) self.assertNotEqual(o, '') s, o = exec_command.exec_command( '"%s" -c "f = open(\'%s\', \'r\'); print(f.read()); ' 'f.close()"' % (self.pyexe, fn), execute_in=tmpdir, **kws) self.assertEqual(s, 0) self.assertEqual(o, 'Hello') def test_basic(self): with redirect_stdout(StringIO()): with redirect_stderr(StringIO()): if os.name == "posix": self.check_posix(use_tee=0) self.check_posix(use_tee=1) elif os.name == "nt": self.check_nt(use_tee=0) self.check_nt(use_tee=1) self.check_execute_in(use_tee=0) self.check_execute_in(use_tee=1) if __name__ == "__main__": run_module_suite()