Move TestingMiddleware to tests/tools.py

This middleware isn't needed outside of the tests, so let's
just put it there.

mediagoblin/tests/tools.py

@@ -23,7 +23,6 @@ from webtest import TestApp
 
 from mediagoblin import mg_globals
 from mediagoblin.tools import testing
-from mediagoblin.middleware.testing import TestingMiddleware
 from mediagoblin.init.config import read_mediagoblin_config
 from mediagoblin.decorators import _make_safe
 from mediagoblin.db.open import setup_connection_and_db_from_config
@@ -51,6 +50,51 @@ $ CELERY_CONFIG_MODULE=mediagoblin.init.celery.from_tests ./bin/nosetests"""
 class BadCeleryEnviron(Exception): pass
 
 
+class TestingMiddleware(object):
+    """
+    Middleware for the Unit tests
+    
+    It might make sense to perform some tests on all
+    requests/responses. Or prepare them in a special
+    manner. For example all html responses could be tested
+    for being valid html *after* being rendered.
+
+    This module is getting inserted at the front of the
+    middleware list, which means: requests are handed here
+    first, responses last. So this wraps up the "normal"
+    app.
+
+    If you need to add a test, either add it directly to
+    the appropiate process_request or process_response, or
+    create a new method and call it from process_*.
+    """
+
+    def __init__(self, mg_app):
+        self.app = mg_app
+
+    def process_request(self, request):
+        pass
+
+    def process_response(self, request, response):
+        # All following tests should be for html only!
+        if response.content_type != "text/html":
+            # Get out early
+            return
+
+        # If the template contains a reference to
+        # /mgoblin_static/ instead of using
+        # /request.staticdirect(), error out here.
+        # This could probably be implemented as a grep on
+        # the shipped templates easier...
+        if response.text.find("/mgoblin_static/") >= 0:
+            raise AssertionError(
+                "Response HTML contains reference to /mgoblin_static/ "
+                "instead of staticdirect. Request was for: "
+                + request.full_path)
+
+        return
+
+
 def suicide_if_bad_celery_environ():
     if not os.environ.get('CELERY_CONFIG_MODULE') == \
             'mediagoblin.init.celery.from_tests':