text: #!/usr/bin/env vpython3
  # Copyright (c) 2012 The Chromium Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  
  """Unit tests for subprocess2.py."""
  
  import os
  import sys
  import unittest
  
  if sys.version_info.major == 2:
    import mock
  else:
    from unittest import mock
  
  DEPOT_TOOLS = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
  sys.path.insert(0, DEPOT_TOOLS)
  
  import subprocess
  import subprocess2
  
  
  TEST_COMMAND = [
      sys.executable,
      os.path.join(DEPOT_TOOLS, 'testing_support', 'subprocess2_test_script.py'),
  ]
  
  
  class DefaultsTest(unittest.TestCase):
    @mock.patch('subprocess2.communicate')
    def test_check_call_defaults(self, mockCommunicate):
      mockCommunicate.return_value = (('stdout', 'stderr'), 0)
      self.assertEqual(
          ('stdout', 'stderr'), subprocess2.check_call_out(['foo'], a=True))
      mockCommunicate.assert_called_with(['foo'], a=True)
  
    @mock.patch('subprocess2.communicate')
    def test_capture_defaults(self, mockCommunicate):
      mockCommunicate.return_value = (('stdout', 'stderr'), 0)
      self.assertEqual(
          'stdout', subprocess2.capture(['foo'], a=True))
      mockCommunicate.assert_called_with(
          ['foo'], a=True, stdin=subprocess2.VOID_INPUT, stdout=subprocess2.PIPE)
  
    @mock.patch('subprocess2.Popen')
    def test_communicate_defaults(self, mockPopen):
      mockPopen().communicate.return_value = ('bar', 'baz')
      mockPopen().returncode = -8
      self.assertEqual(
          (('bar', 'baz'), -8), subprocess2.communicate(['foo'], a=True))
      mockPopen.assert_called_with(['foo'], a=True)
  
    @mock.patch('os.environ', {})
    @mock.patch('subprocess.Popen.__init__')
    def test_Popen_defaults(self, mockPopen):
      with mock.patch('sys.platform', 'win32'):
        subprocess2.Popen(['foo'], a=True)
        mockPopen.assert_called_with(['foo'], a=True, shell=True)
  
      with mock.patch('sys.platform', 'non-win32'):
        subprocess2.Popen(['foo'], a=True)
        mockPopen.assert_called_with(['foo'], a=True, shell=False)
  
    def test_get_english_env(self):
      with mock.patch('sys.platform', 'win32'):
        self.assertIsNone(subprocess2.get_english_env({}))
  
      with mock.patch('sys.platform', 'non-win32'):
        self.assertIsNone(subprocess2.get_english_env({}))
        self.assertIsNone(
            subprocess2.get_english_env({'LANG': 'en_XX', 'LANGUAGE': 'en_YY'}))
        self.assertEqual(
            {'LANG': 'en_US.UTF-8', 'LANGUAGE': 'en_US.UTF-8'},
            subprocess2.get_english_env({'LANG': 'bar', 'LANGUAGE': 'baz'}))
  
    @mock.patch('subprocess2.communicate')
    def test_check_output_defaults(self, mockCommunicate):
      mockCommunicate.return_value = (('stdout', 'stderr'), 0)
      self.assertEqual('stdout', subprocess2.check_output(['foo'], a=True))
      mockCommunicate.assert_called_with(
          ['foo'], a=True, stdin=subprocess2.VOID_INPUT, stdout=subprocess2.PIPE)
  
    @mock.patch('subprocess.Popen.__init__')
    def test_env_type(self, mockPopen):
      if sys.version_info.major != 2:
        subprocess2.Popen(['foo'], env={b'key': b'value'})
        mockPopen.assert_called_with(['foo'],
                                     env={'key': 'value'},
                                     shell=mock.ANY)
  
  
  def _run_test(with_subprocess=True):
    """Runs a tests in 12 combinations:
    - With universal_newlines=True and False.
    - With LF, CR, and CRLF output.
    - With subprocess and subprocess2.
    """
    subps = (subprocess2, subprocess) if with_subprocess else (subprocess2,)
    no_op = lambda s: s
    to_bytes = lambda s: s.encode()
    to_cr_bytes = lambda s: s.replace('\n', '\r').encode()
    to_crlf_bytes = lambda s: s.replace('\n', '\r\n').encode()
    def wrapper(test):
      def inner(self):
        for subp in subps:
          # universal_newlines = False
          test(self, to_bytes, TEST_COMMAND, False, subp)
          test(self, to_cr_bytes, TEST_COMMAND + ['--cr'], False, subp)
          test(self, to_crlf_bytes, TEST_COMMAND + ['--crlf'], False, subp)
          # universal_newlines = True
          test(self, no_op, TEST_COMMAND, True, subp)
          test(self, no_op, TEST_COMMAND + ['--cr'], True, subp)
          test(self, no_op, TEST_COMMAND + ['--crlf'], True, subp)
  
      return inner
    return wrapper
  
  
  class SmokeTests(unittest.TestCase):
    # Regression tests to ensure that subprocess and subprocess2 have the same
    # behavior.
    def _check_res(self, res, stdout, stderr, returncode):
      (out, err), code = res
      self.assertEqual(stdout, out)
      self.assertEqual(stderr, err)
      self.assertEqual(returncode, code)
  
    def _check_exception(self, subp, e, stdout, stderr, returncode):
      """On exception, look if the exception members are set correctly."""
      self.assertEqual(returncode, e.returncode)
      if subp is subprocess2 or sys.version_info.major == 3:
        self.assertEqual(stdout, e.stdout)
        self.assertEqual(stderr, e.stderr)
      else:
        # subprocess never save the output.
        self.assertFalse(hasattr(e, 'stdout'))
        self.assertFalse(hasattr(e, 'stderr'))
  
    def test_check_output_no_stdout(self):
      for subp in (subprocess, subprocess2):
        with self.assertRaises(ValueError):
          subp.check_output(TEST_COMMAND, stdout=subp.PIPE)
  
    @_run_test()
    def test_check_output_throw_stdout(self, c, cmd, un, subp):
      with self.assertRaises(subp.CalledProcessError) as e:
        subp.check_output(
            cmd + ['--fail', '--stdout'], universal_newlines=un)
      self._check_exception(subp, e.exception, c('A\nBB\nCCC\n'), None, 64)
  
    @_run_test()
    def test_check_output_throw_no_stderr(self, c, cmd, un, subp):
      with self.assertRaises(subp.CalledProcessError) as e:
        subp.check_output(
            cmd + ['--fail', '--stderr'], universal_newlines=un)
      self._check_exception(subp, e.exception, c(''), None, 64)
  
    @_run_test()
    def test_check_output_throw_stderr(self, c, cmd, un, subp):
      with self.assertRaises(subp.CalledProcessError) as e:
        subp.check_output(
            cmd + ['--fail', '--stderr'],
            stderr=subp.PIPE,
            universal_newlines=un)
      self._check_exception(subp, e.exception, c(''), c('a\nbb\nccc\n'), 64)
  
    @_run_test()
    def test_check_output_throw_stderr_stdout(self, c, cmd, un, subp):
      with self.assertRaises(subp.CalledProcessError) as e:
        subp.check_output(
            cmd + ['--fail', '--stderr'],
            stderr=subp.STDOUT,
            universal_newlines=un)
      self._check_exception(subp, e.exception, c('a\nbb\nccc\n'), None, 64)
  
    def test_check_call_throw(self):
      for subp in (subprocess, subprocess2):
        with self.assertRaises(subp.CalledProcessError) as e:
          subp.check_call(TEST_COMMAND + ['--fail', '--stderr'])
        self._check_exception(subp, e.exception, None, None, 64)
  
    @_run_test()
    def test_redirect_stderr_to_stdout_pipe(self, c, cmd, un, subp):
      # stderr output into stdout.
      proc = subp.Popen(
          cmd + ['--stderr'],
          stdout=subp.PIPE,
          stderr=subp.STDOUT,
          universal_newlines=un)
      res = proc.communicate(), proc.returncode
      self._check_res(res, c('a\nbb\nccc\n'), None, 0)
  
    @_run_test()
    def test_redirect_stderr_to_stdout(self, c, cmd, un, subp):
      # stderr output into stdout but stdout is not piped.
      proc = subp.Popen(
          cmd + ['--stderr'], stderr=subprocess2.STDOUT, universal_newlines=un)
      res = proc.communicate(), proc.returncode
      self._check_res(res, None, None, 0)
  
    @_run_test()
    def test_stderr(self, c, cmd, un, subp):
      cmd = ['expr', '1', '/', '0']
      if sys.platform == 'win32':
        cmd = ['cmd.exe', '/c', 'exit', '1']
      p1 = subprocess.Popen(cmd, stderr=subprocess.PIPE, shell=False)
      p2 = subprocess2.Popen(cmd, stderr=subprocess.PIPE, shell=False)
      r1 = p1.communicate()
      r2 = p2.communicate()
      self.assertEqual(r1, r2)
  
    @_run_test(with_subprocess=False)
    def test_stdin(self, c, cmd, un, subp):
      stdin = c('0123456789')
      res = subprocess2.communicate(
          cmd + ['--read'],
          stdin=stdin,
          universal_newlines=un)
      self._check_res(res, None, None, 10)
  
    @_run_test(with_subprocess=False)
    def test_stdin_empty(self, c, cmd, un, subp):
      stdin = c('')
      res = subprocess2.communicate(
          cmd + ['--read'],
          stdin=stdin,
          universal_newlines=un)
      self._check_res(res, None, None, 0)
  
    def test_stdin_void(self):
      res = subprocess2.communicate(
          TEST_COMMAND + ['--read'],
          stdin=subprocess2.VOID_INPUT)
      self._check_res(res, None, None, 0)
  
    @_run_test(with_subprocess=False)
    def test_stdin_void_stdout(self, c, cmd, un, subp):
      # Make sure a mix ofsubprocess2.VOID andsubprocess2.PIPE works.
      res = subprocess2.communicate(
          cmd + ['--stdout', '--read'],
          stdin=subprocess2.VOID_INPUT,
          stdout=subprocess2.PIPE,
          universal_newlines=un,
          shell=False)
      self._check_res(res, c('A\nBB\nCCC\n'), None, 0)
  
    @_run_test(with_subprocess=False)
    def test_stdout_void(self, c, cmd, un, subp):
      res = subprocess2.communicate(
          cmd + ['--stdout', '--stderr'],
          stdout=subprocess2.VOID,
          stderr=subprocess2.PIPE,
          universal_newlines=un)
      self._check_res(res, None, c('a\nbb\nccc\n'), 0)
  
    @_run_test(with_subprocess=False)
    def test_stderr_void(self, c, cmd, un, subp):
      res = subprocess2.communicate(
          cmd + ['--stdout', '--stderr'],
          stdout=subprocess2.PIPE,
          stderr=subprocess2.VOID,
          universal_newlines=un)
      self._check_res(res, c('A\nBB\nCCC\n'), None, 0)
  
    @_run_test(with_subprocess=False)
    def test_stdout_void_stderr_redirect(self, c, cmd, un, subp):
      res = subprocess2.communicate(
          cmd + ['--stdout', '--stderr'],
          stdout=subprocess2.VOID,
          stderr=subprocess2.STDOUT,
          universal_newlines=un)
      self._check_res(res, None, None, 0)
  
  
  if __name__ == '__main__':
    unittest.main()
  