fix for docs&tests

docs/sanic/class_based_views.md

@@ -48,6 +48,24 @@ app.add_route(SimpleView.as_view(), '/')
 
 ```
 
+You can also use `async` syntax.
+
+```python
+from sanic import Sanic
+from sanic.views import HTTPMethodView
+from sanic.response import text
+
+app = Sanic('some_name')
+
+class SimpleAsyncView(HTTPMethodView):
+
+  async def get(self, request):
+      return text('I am async get method')
+
+app.add_route(SimpleAsyncView.as_view(), '/')
+
+```
+
 ## URL parameters
 
 If you need any URL parameters, as discussed in the routing guide, include them

tests/test_views.py

@@ -15,13 +15,13 @@ def test_methods(method):
 
     class DummyView(HTTPMethodView):
 
-        def get(self, request):
+        async def get(self, request):
             return text('', headers={'method': 'GET'})
 
         def post(self, request):
             return text('', headers={'method': 'POST'})
 
-        def put(self, request):
+        async def put(self, request):
             return text('', headers={'method': 'PUT'})
 
         def head(self, request):
@@ -30,7 +30,7 @@ def test_methods(method):
         def options(self, request):
             return text('', headers={'method': 'OPTIONS'})
 
-        def patch(self, request):
+        async def patch(self, request):
             return text('', headers={'method': 'PATCH'})
 
         def delete(self, request):