Fix test_cookie_expires (#2481)

tests/test_cookies.py

@@ -223,17 +223,17 @@ def handler(request):
 
 
 @pytest.mark.parametrize(
-    "expires", [datetime.utcnow() + timedelta(seconds=60)]
+    "expires", [timedelta(seconds=60)]
 )
-def test_cookie_expires(app: Sanic, expires: datetime):
-    expires = expires.replace(microsecond=0)
+def test_cookie_expires(app: Sanic, expires: timedelta):
+    expires_time = datetime.utcnow().replace(microsecond=0) + expires
     cookies = {"test": "wait"}
 
     @app.get("/")
     def handler(request):
         response = text("pass")
         response.cookies["test"] = "pass"
-        response.cookies["test"]["expires"] = expires
+        response.cookies["test"]["expires"] = expires_time
         return response
 
     request, response = app.test_client.get(
@@ -246,7 +246,7 @@ def handler(request):
 
     assert response.status == 200
     assert response.cookies["test"] == "pass"
-    assert cookie_expires == expires
+    assert cookie_expires == expires_time
 
 
 @pytest.mark.parametrize("expires", ["Fri, 21-Dec-2018 15:30:00 GMT"])