Fix automatic shell detection, the check was reversed

tests/subprocess2_test.py

 #!/usr/bin/env python
 # Copyright (c) 2011 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 optparse
 import os
 import sys
 import time
 import unittest
 
 ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 sys.path.insert(0, ROOT_DIR)
 
 import subprocess2
 
+# Method could be a function
+# pylint: disable=R0201
 
 class Subprocess2Test(unittest.TestCase):
   # Can be mocked in a test.
-  TO_SAVE = ['Popen', 'call', 'check_call', 'capture', 'check_output']
+  TO_SAVE = {
+      subprocess2: ['Popen', 'call', 'check_call', 'capture', 'check_output'],

[Dirk Pranke, 2011/04/05 21:18:49]

Don't need to change this in this patch, but, do you need to stub out things
beyond Popen()? Doesn't everything else end up calling that?

+      subprocess2.subprocess: ['Popen'],
+  }
 
   def setUp(self):
     self.exe_path = __file__
     self.exe = [self.exe_path, '--child']
-    self.saved = dict(
-        (name, getattr(subprocess2, name)) for name in self.TO_SAVE)
+    self.saved = {}
+    for module, names in self.TO_SAVE.iteritems():
+      self.saved[module] = dict(
+          (name, getattr(module, name)) for name in names)
 
   def tearDown(self):
-    for name, value in self.saved.iteritems():
-      setattr(subprocess2, name, value)
+    for module, saved in self.saved.iteritems():
+      for name, value in saved.iteritems():
+        setattr(module, name, value)
 
   @staticmethod
-  def _prep():
+  def _fake_call():
     results = {}
     def fake_call(args, **kwargs):
+      assert not results
       results.update(kwargs)
       results['args'] = args
       return ['stdout', 'stderr'], 0
     subprocess2.call = fake_call
     return results
 
+  @staticmethod
+  def _fake_Popen():
+    results = {}
+    class fake_Popen(object):
+      returncode = -8
+      def __init__(self, args, **kwargs):
+        assert not results
+        results.update(kwargs)
+        results['args'] = args
+      def communicate(self):
+        return None, None
+    subprocess2.Popen = fake_Popen
+    return results
+
+  @staticmethod
+  def _fake_subprocess_Popen():
+    results = {}
+    class fake_Popen(object):
+      returncode = -8
+      def __init__(self, args, **kwargs):
+        assert not results
+        results.update(kwargs)
+        results['args'] = args
+      def communicate(self):
+        return None, None
+    subprocess2.subprocess.Popen = fake_Popen
+    return results
+
   def test_check_call_defaults(self):
-    results = self._prep()
+    results = self._fake_call()
     self.assertEquals(
         ['stdout', 'stderr'], subprocess2.check_call(['foo'], a=True))
     expected = {
         'args': ['foo'],
         'a':True,
     }
     self.assertEquals(expected, results)
 
+  def test_call_defaults(self):
+    results = self._fake_Popen()
+    self.assertEquals(((None, None), -8), subprocess2.call(['foo'], a=True))
+    expected = {
+        'args': ['foo'],
+        'a': True,
+    }
+    self.assertEquals(expected, results)
+
+  def test_Popen_defaults(self):
+    results = self._fake_subprocess_Popen()
+    proc = subprocess2.Popen(['foo'], a=True)
+    self.assertEquals(-8, proc.returncode)
+    env = os.environ.copy()
+    env['LANG'] = 'en_US.UTF-8'
+    expected = {
+        'args': ['foo'],
+        'a': True,
+        'shell': bool(sys.platform=='win32'),
+        'env': env,
+    }
+    self.assertEquals(expected, results)
+
   def test_check_output_defaults(self):
-    results = self._prep()
+    results = self._fake_call()
     # It's discarding 'stderr' because it assumes stderr=subprocess2.STDOUT but
     # fake_call() doesn't 'implement' that.
     self.assertEquals('stdout', subprocess2.check_output(['foo'], a=True))
     expected = {
         'args': ['foo'],
         'a':True,
         'stdout': subprocess2.PIPE,
         'stderr': subprocess2.STDOUT,
     }
     self.assertEquals(expected, results)
@@ skipping 62 matching lines @@
   do('CCC')
   if options.sleep:
     time.sleep(10)
   return options.return_value
 
 
 if __name__ == '__main__':
   if len(sys.argv) > 1 and sys.argv[1] == '--child':
     sys.exit(child_main(sys.argv[2:]))
   unittest.main()