[1.5.x] Fixed #19487 -- Used str in the test client's WSGI environ.

This regression was introduced by the unicode_literals patch. The WSGI
spec mandates that environ contains native strings.

Backport of d9a0b6a.

django/test/client.py

@@ -21,7 +21,7 @@
 from django.template import TemplateDoesNotExist
 from django.test import signals
 from django.utils.functional import curry
-from django.utils.encoding import force_bytes
+from django.utils.encoding import force_bytes, force_str
 from django.utils.http import urlencode
 from django.utils.importlib import import_module
 from django.utils.itercompat import is_iterable
@@ -205,15 +205,15 @@ def _base_environ(self, **request):
         # See http://www.python.org/dev/peps/pep-3333/#environ-variables
         environ = {
             'HTTP_COOKIE':       self.cookies.output(header='', sep='; '),
-            'PATH_INFO':         '/',
-            'REMOTE_ADDR':       '127.0.0.1',
-            'REQUEST_METHOD':    'GET',
-            'SCRIPT_NAME':       '',
-            'SERVER_NAME':       'testserver',
-            'SERVER_PORT':       '80',
-            'SERVER_PROTOCOL':   'HTTP/1.1',
+            'PATH_INFO':         str('/'),
+            'REMOTE_ADDR':       str('127.0.0.1'),
+            'REQUEST_METHOD':    str('GET'),
+            'SCRIPT_NAME':       str(''),
+            'SERVER_NAME':       str('testserver'),
+            'SERVER_PORT':       str('80'),
+            'SERVER_PROTOCOL':   str('HTTP/1.1'),
             'wsgi.version':      (1, 0),
-            'wsgi.url_scheme':   'http',
+            'wsgi.url_scheme':   str('http'),
             'wsgi.input':        FakePayload(b''),
             'wsgi.errors':       self.errors,
             'wsgi.multiprocess': True,
@@ -241,21 +241,21 @@ def _encode_data(self, data, content_type, ):
             return force_bytes(data, encoding=charset)
 
     def _get_path(self, parsed):
+        path = force_str(parsed[2])
         # If there are parameters, add them
         if parsed[3]:
-            return unquote(parsed[2] + ";" + parsed[3])
-        else:
-            return unquote(parsed[2])
+            path += str(";") + force_str(parsed[3])
+        return unquote(path)
 
     def get(self, path, data={}, **extra):
         "Construct a GET request."
 
         parsed = urlparse(path)
         r = {
-            'CONTENT_TYPE':    'text/html; charset=utf-8',
+            'CONTENT_TYPE':    str('text/html; charset=utf-8'),
             'PATH_INFO':       self._get_path(parsed),
-            'QUERY_STRING':    urlencode(data, doseq=True) or parsed[4],
-            'REQUEST_METHOD': 'GET',
+            'QUERY_STRING':    urlencode(data, doseq=True) or force_str(parsed[4]),
+            'REQUEST_METHOD':  str('GET'),
         }
         r.update(extra)
         return self.request(**r)
@@ -271,8 +271,8 @@ def post(self, path, data={}, content_type=MULTIPART_CONTENT,
             'CONTENT_LENGTH': len(post_data),
             'CONTENT_TYPE':   content_type,
             'PATH_INFO':      self._get_path(parsed),
-            'QUERY_STRING':   parsed[4],
-            'REQUEST_METHOD': 'POST',
+            'QUERY_STRING':   force_str(parsed[4]),
+            'REQUEST_METHOD': str('POST'),
             'wsgi.input':     FakePayload(post_data),
         }
         r.update(extra)
@@ -283,10 +283,10 @@ def head(self, path, data={}, **extra):
 
         parsed = urlparse(path)
         r = {
-            'CONTENT_TYPE':    'text/html; charset=utf-8',
+            'CONTENT_TYPE':    str('text/html; charset=utf-8'),
             'PATH_INFO':       self._get_path(parsed),
-            'QUERY_STRING':    urlencode(data, doseq=True) or parsed[4],
-            'REQUEST_METHOD': 'HEAD',
+            'QUERY_STRING':    urlencode(data, doseq=True) or force_str(parsed[4]),
+            'REQUEST_METHOD':  str('HEAD'),
         }
         r.update(extra)
         return self.request(**r)
@@ -312,13 +312,13 @@ def generic(self, method, path,
         data = force_bytes(data, settings.DEFAULT_CHARSET)
         r = {
             'PATH_INFO':      self._get_path(parsed),
-            'QUERY_STRING':   parsed[4],
-            'REQUEST_METHOD': method,
+            'QUERY_STRING':   force_str(parsed[4]),
+            'REQUEST_METHOD': str(method),
         }
         if data:
             r.update({
                 'CONTENT_LENGTH': len(data),
-                'CONTENT_TYPE':   content_type,
+                'CONTENT_TYPE':   str(content_type),
                 'wsgi.input':     FakePayload(data),
             })
         r.update(extra)