Make the app config more powerful in terms of injecting fake dependencies. Refactor the tests to use metaclasses and to actually all run.

test/teststorage.py

@@ -0,0 +1,34 @@
+from uuid import uuid4
+
+from storage.basestorage import Storage
+
+
+class FakeStorage(Storage):
+  def _init_path(self, path=None, create=False):
+    return path
+
+  def get_content(self, path):
+    raise IOError('Fake files are fake!')
+
+  def put_content(self, path, content):
+    return path
+
+  def stream_read(self, path):
+    yield ''
+
+  def stream_write(self, path, fp):
+    pass
+
+  def exists(self, path):
+    return True
+
+
+class FakeUserfiles(object):
+  def prepare_for_drop(self, mime_type):
+    return ('http://fake/url', uuid4())
+
+  def store_file(self, flask_file):
+    raise NotImplementedError()
+
+  def get_file_url(self, file_id, expires_in=300):
+    return ('http://fake/url')