#22 Get stderr and stdout with LANG=C

tests/test_main.py

@@ -46,7 +46,9 @@ def test_get_rules():
 
 
 def test_get_command():
-    with patch('thefuck.main.Popen') as Popen:
+    with patch('thefuck.main.Popen') as Popen,\
+            patch('thefuck.main.os.environ',
+                  new_callable=lambda: {}):
         Popen.return_value.stdout.read.return_value = b'stdout'
         Popen.return_value.stderr.read.return_value = b'stderr'
         assert main.get_command(['thefuck', 'apt-get', 'search', 'vim']) \
@@ -54,7 +56,8 @@ def test_get_command():
         Popen.assert_called_once_with('apt-get search vim',
                                       shell=True,
                                       stdout=PIPE,
-                                      stderr=PIPE)
+                                      stderr=PIPE,
+                                      env={'LANG': 'C'})
 
 
 def test_get_matched_rule():

thefuck/main.py

@@ -3,6 +3,7 @@ from imp import load_source
 from pathlib import Path
 from os.path import expanduser
 from subprocess import Popen, PIPE
+import os
 import sys
 
 
@@ -56,7 +57,8 @@ def get_rules(user_dir, settings):
 def get_command(args):
     """Creates command from `args` and executes it."""
     script = ' '.join(args[1:])
-    result = Popen(script, shell=True, stdout=PIPE, stderr=PIPE)
+    result = Popen(script, shell=True, stdout=PIPE, stderr=PIPE,
+                   env=dict(os.environ, LANG='C'))
     return Command(script, result.stdout.read().decode('utf-8'),
                    result.stderr.read().decode('utf-8'))