Raise error if response is malformed. Issue #115

tests/test_requests.py

@@ -2,6 +2,7 @@ from json import loads as json_loads, dumps as json_dumps
 from sanic import Sanic
 from sanic.response import json, text
 from sanic.utils import sanic_endpoint_test
+from sanic.exceptions import ServerError
 
 
 # ------------------------------------------------------------ #
@@ -32,6 +33,22 @@ def test_text():
     assert response.text == 'Hello'
 
 
+def test_invalid_response():
+    app = Sanic('test_invalid_response')
+
+    @app.exception(ServerError)
+    def handler_exception(request, exception):
+        return text('Internal Server Error.', 500)
+
+    @app.route('/')
+    async def handler(request):
+        return 'This should fail'
+
+    request, response = sanic_endpoint_test(app)
+    assert response.status == 500
+    assert response.text == "Internal Server Error."
+
+
 def test_json():
     app = Sanic('test_json')