591: Let Testing Middleware check for staticdirect() usage

All references to static, shipped content should go via
request.staticdirect().

So insert a TestingMiddleware in the chain, which tests for
this on all requests/reponses happening in the test suite.
It's a simple text search for a bogus usage pattern.

mediagoblin/tests/test_mgoblin_app.ini

@@ -1,5 +1,5 @@
 [mediagoblin]
-direct_remote_path = /mgoblin_static/
+direct_remote_path = /test_static/
 email_sender_address = "notice@mediagoblin.example.org"
 email_debug_mode = true
 db_name = __mediagoblin_tests__

mediagoblin/tests/test_paste.ini

@@ -5,7 +5,7 @@ debug = true
 use = egg:Paste#urlmap
 / = mediagoblin
 /mgoblin_media/ = publicstore_serve
-/mgoblin_static/ = mediagoblin_static
+/test_static/ = mediagoblin_static
 
 [app:mediagoblin]
 use = egg:mediagoblin#app

mediagoblin/tests/tools.py

@@ -21,7 +21,9 @@ import os, shutil
 from paste.deploy import loadapp
 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
@@ -103,6 +105,10 @@ def get_test_app(dump_old_app=True):
     test_app = loadapp(
         'config:' + TEST_SERVER_CONFIG)
 
+    # Insert the TestingMiddleware, which can do some
+    # sanity checks on every request/response.
+    mg_globals.app.middleware.insert(0, TestingMiddleware(mg_globals.app))
+
     app = TestApp(test_app)
     MGOBLIN_APP = app