from nose.tools import assert_raises from paste.deploy.config import ConfigMiddleware from paste.fixture import TestApp class Bug(Exception): pass def app_with_exception(environ, start_response): def cont(): yield "something" raise Bug start_response('200 OK', [('Content-type', 'text/html')]) return cont() def test_error(): wrapped = ConfigMiddleware(app_with_exception, {'test': 1}) test_app = TestApp(wrapped) assert_raises(Bug, test_app.get, '/')