Merge branch '7.0' into 7.1

* 7.0:
  [Panther] Add component documentation

Author: javiereguiluz

.doctor-rst.yaml

@@ -111,4 +111,4 @@ whitelist:
         - '.. versionadded:: 3.6' # MonologBundle
         - '.. versionadded:: 3.8' # MonologBundle
         - '.. _`a feature to test applications using Mercure`: https://github.com/symfony/panther#creating-isolated-browsers-to-test-apps-using-mercure-or-websocket'
-        - '..  End to End Tests (E2E)'
+        - 'End to End Tests (E2E)'

testing.rst

@@ -1128,12 +1128,15 @@ HttpClient Assertions
     By default it will check on the HttpClient, but you can also pass a specific
     HttpClient ID.
 
-.. TODO
-..  End to End Tests (E2E)
-..  ----------------------
-..  * panther
-..  * testing javascript
-..  * UX or form collections as example?
+End to End Tests (E2E)
+~~~~~~~~~~~~~~~~~~~~~~
+
+If you need to test the application as a whole, including the JavaScript
+code, you can use a real browser instead of the test client. This is
+called an end-to-end test and it's a great way to test the application.
+
+This can be achieved thanks to the Panther component. You can learn more
+about it in :doc:`the dedicated page </testing/end_to_end>`.
 
 Learn more
 ----------