Refs #17235 -- Made MultiPartParser leave request.POST immutable.

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/requests/tests.py b/tests/requests/tests.py
index 0942619715..27dc439e5f 100644
--- a/tests/requests/tests.py
+++ b/tests/requests/tests.py
@@ -533,6 +533,25 @@ class RequestsTests(SimpleTestCase):
         self.assertEqual(request.read(13), b'--boundary\r\nC')
         self.assertEqual(request.POST, {'name': ['value']})
 
+    def test_POST_immutable_for_mutipart(self):
+        """
+        MultiPartParser.parse() leaves request.POST immutable.
+        """
+        payload = FakePayload("\r\n".join([
+            '--boundary',
+            'Content-Disposition: form-data; name="name"',
+            '',
+            'value',
+            '--boundary--',
+        ]))
+        request = WSGIRequest({
+            'REQUEST_METHOD': 'POST',
+            'CONTENT_TYPE': 'multipart/form-data; boundary=boundary',
+            'CONTENT_LENGTH': len(payload),
+            'wsgi.input': payload,
+        })
+        self.assertFalse(request.POST._mutable)
+
     def test_POST_connection_error(self):
         """
         If wsgi.input.read() raises an exception while trying to read() the