Add tests

Tests stolen from https://github.com/zopefoundation/zope.publisher/pull/15/files
and mangled beyond recognition as is my habit.

Co-Authored-By: Brian Sutherland <brian@sutherland.es>

src/zope/publisher/tests/test_browserrequest.py

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 ##############################################################################
 #
 # Copyright (c) 2001, 2002 Zope Foundation and Contributors.
@@ -282,6 +283,43 @@ def testForm(self):
         self.assertEqual(request.form,
                          {u"a": u"5", u"b": 6})
 
+    def testFormMultipartUTF8(self):
+        extra = {
+            'REQUEST_METHOD': 'POST',
+            'CONTENT_TYPE': 'multipart/form_data; boundary=-123',
+        }
+        body = b'\n'.join([
+            b'---123',
+            b'Content-Disposition: form-data; name="a"',
+            b'',
+            b'5',
+            b'---123',
+            b'Content-Disposition: form-data; name="b:int"',
+            b'',
+            b'6',
+            b'---123',
+            b'Content-Disposition: form-data; name="street"',
+            b'',
+            b'\xe6\xb1\x89\xe8\xaf\xad/\xe6\xbc\xa2\xe8\xaa\x9e',
+            b'---123--',
+            b'',
+        ])
+        request = self._createRequest(extra, body)
+        publish(request)
+        self.assertTrue(isinstance(request.form[u"street"], unicode))
+        self.assertEqual(u"汉语/漢語", request.form['street'])
+
+    def testFormURLEncodedUTF8(self):
+        extra = {
+            'REQUEST_METHOD': 'POST',
+            'CONTENT_TYPE': 'application/x-www-form-urlencoded',
+        }
+        body = b'a=5&b:int=6&street=\xe6\xb1\x89\xe8\xaf\xad/\xe6\xbc\xa2\xe8\xaa\x9e'
+        request = self._createRequest(extra, body)
+        publish(request)
+        self.assertTrue(isinstance(request.form[u"street"], unicode))
+        self.assertEqual(u"汉语/漢語", request.form['street'])
+
     def testFormNoEncodingUsesUTF8(self):
         encoded = 'K\xc3\xb6hlerstra\xc3\x9fe'
         extra = {