Added the possibility to pass a stdin object to a management command.

This makes testing certain features easier.

Thanks to AeroNotix for the original patch.

django/core/management/base.py

@@ -306,6 +306,7 @@ class BaseCommand(object):
             self.stderr = OutputWrapper(options.get('stderr', sys.stderr))
         else:
             self.stderr = OutputWrapper(options.get('stderr', sys.stderr), self.style.ERROR)
+        self.stdin = options.get('stdin', sys.stdin)  # Useful for testing
 
         if self.can_import_settings:
             from django.conf import settings  # NOQA

tests/user_commands/tests.py

@@ -2,6 +2,7 @@ import sys
 
 from django.core import management
 from django.core.management import CommandError
+from django.core.management.base import BaseCommand
 from django.core.management.utils import popen_wrapper
 from django.test import SimpleTestCase
 from django.utils import translation
@@ -60,6 +61,32 @@ class CommandTests(SimpleTestCase):
             management.call_command('leave_locale_alone_true', stdout=out)
             self.assertEqual(out.getvalue(), "pl\n")
 
+    def test_passing_stdin(self):
+        """
+        You can pass a stdin object to a command's options and it should be
+        available on self.stdin.
+        """
+        class CustomCommand(BaseCommand):
+            def handle(self, *args, **kwargs):
+                pass
+
+        sentinel = object()
+        command = CustomCommand()
+        command.execute(stdin=sentinel, stdout=StringIO())
+        self.assertIs(command.stdin, sentinel)
+
+    def test_passing_stdin_default(self):
+        """
+        If stdin is not passed as an option, the default should be sys.stdin.
+        """
+        class CustomCommand(BaseCommand):
+            def handle(self, *args, **kwargs):
+                return 'OK'
+
+        command = CustomCommand()
+        command.execute(stdout=StringIO())
+        self.assertIs(command.stdin, sys.stdin)
+
 
 class UtilsTests(SimpleTestCase):