Add failing test for issue #1381

setuptools/tests/test_upload.py

 import mock
+import os
+import re
+
 from distutils import log
+from distutils.version import StrictVersion
 
 import pytest
+import six
 
 from setuptools.command.upload import upload
 from setuptools.dist import Distribution
 
 
+def _parse_upload_body(body):
+    boundary = u'\r\n----------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
+    entries = []
+    name_re = re.compile(u'^Content-Disposition: form-data; name="([^\"]+)"')
+
+    for entry in body.split(boundary):
+        pair = entry.split(u'\r\n\r\n')
+        if not len(pair) == 2:
+            continue
+
+        key, value = map(six.text_type.strip, pair)
+        m = name_re.match(key)
+        if m is not None:
+            key = m.group(1)
+
+        entries.append((key, value))
+
+    return entries
+
+
 class TestUploadTest:
+    @pytest.mark.xfail(reason='Issue #1381')
+    @mock.patch('setuptools.command.upload.urlopen')
+    def test_upload_metadata(self, patch, tmpdir):
+        dist = Distribution()
+        dist.metadata.metadata_version = StrictVersion('2.1')
+
+        content = os.path.join(str(tmpdir), "test_upload_metadata_content")
+
+        with open(content, 'w') as f:
+            f.write("Some content")
+
+        dist.dist_files = [('xxx', '3.7', content)]
+
+        patch.return_value = mock.Mock()
+        patch.return_value.getcode.return_value = 200
+
+        cmd = upload(dist)
+        cmd.announce = mock.Mock()
+        cmd.username = 'user'
+        cmd.password = 'hunter2'
+        cmd.ensure_finalized()
+        cmd.run()
+
+        # Make sure we did the upload
+        patch.assert_called_once()
+
+        # Make sure the metadata version is correct in the headers
+        request = patch.call_args_list[0][0][0]
+        body = request.data.decode('utf-8')
+
+        entries = dict(_parse_upload_body(body))
+        assert entries['metadata_version'] == '2.1'
+
+
     def test_warns_deprecation(self):
         dist = Distribution()
         dist.dist_files = [(mock.Mock(), mock.Mock(), mock.Mock())]