Add async view tests.

Co-authored-by: Uma Annamalai <umaannamalai@users.noreply.github.com>
Co-authored-by: Kevin Yang <kkaiyang94@users.noreply.github.com>
Co-authored-by: Katherine Kelly <kat-star@users.noreply.github.com>

tests/test_async.py

@@ -6,6 +6,7 @@ import pytest
 from flask import Blueprint
 from flask import Flask
 from flask import request
+from flask.views import View, MethodView
 
 pytest.importorskip("asgiref")
 
@@ -53,11 +54,28 @@ def _async_app():
 
     app.register_blueprint(blueprint, url_prefix="/bp")
 
+    class AsyncView(View):
+        methods = ["GET", "POST"]
+
+        async def dispatch_request(self):
+            return request.method
+
+    app.add_url_rule("/async_view", view_func=AsyncView.as_view("async_view"))
+    
+    class AsyncMethodView(MethodView):
+        async def get(self):
+            return "GET"
+
+        async def post(self):
+            return "POST"
+
+    app.add_url_rule("/async_methodview", view_func=AsyncMethodView.as_view("async_methodview"))
+
     return app
 
 
 @pytest.mark.skipif(sys.version_info < (3, 7), reason="requires Python >= 3.7")
-@pytest.mark.parametrize("path", ["/", "/home", "/bp/"])
+@pytest.mark.parametrize("path", ["/", "/home", "/bp/", "async_view", "async_methodview"])
 def test_async_route(path, async_app):
     test_client = async_app.test_client()
     response = test_client.get(path)