fix(flutter): accept a FlutterFinder as scrollView in scroll_till_visible

appium/webdriver/extensions/flutter_integration/flutter_commands.py

@@ -131,7 +131,7 @@ def scroll_till_visible(
             scroll_direction (ScrollDirection): The direction to scroll up or down. Defaults to `ScrollDirection.DOWN`.
 
         KeywordArgs:
-                scrollView (str): The view of the scroll. Default value is 'Scrollable'
+                scrollView (FlutterFinder | dict): Finder of the scrollable view. Defaults to the first `Scrollable` widget
                 delta (int): delta for the scroll. Default value is 64
                 maxScrolls (int): Max times to scroll. Default value is 15
                 settleBetweenScrollsTimeout (float): settle timeout in milliseconds. Default value is 5000
@@ -142,6 +142,8 @@ def scroll_till_visible(
         """
         opts['finder'] = scroll_to.to_dict()
         opts['scrollDirection'] = scroll_direction.value
+        if isinstance(opts.get('scrollView'), FlutterFinder):
+            opts['scrollView'] = opts['scrollView'].to_dict()
         return self.execute_flutter_command('scrollTillVisible', opts)
 
     def inject_mock_image(self, value: str) -> str:

test/unit/webdriver/flutter_integration/flutter_actions_test.py

@@ -120,6 +120,28 @@ def test_scroll_till_visible_with_kwargs(self):
         }
         assert arguments == expected_arguments
 
+    @httpretty.activate
+    def test_scroll_till_visible_with_scroll_view_finder(self):
+        driver = flutter_w3c_driver()
+        flutter = FlutterCommand(driver)
+
+        httpretty.register_uri(
+            httpretty.POST,
+            appium_command('/session/1234567890/execute/sync'),
+        )
+
+        finder = FlutterFinder.by_key('message_field')
+        flutter.scroll_till_visible(finder, scrollView=FlutterFinder.by_key('message_list'))
+
+        request_body = get_httpretty_request_body(httpretty.last_request())
+        arguments = request_body['args'][0]
+        assert request_body['script'] == 'flutter: scrollTillVisible'
+        assert arguments == {
+            'finder': {'using': '-flutter key', 'value': 'message_field'},
+            'scrollView': {'using': '-flutter key', 'value': 'message_list'},
+            'scrollDirection': 'down',
+        }
+
     @httpretty.activate
     def test_inject_mock_image_with_file(self):
         driver = flutter_w3c_driver()