Test: AgentHost - mark change as reviewed/unreviewed

[lszomoru]

Refs: #324393

• anyOS @meganrogge
• anyOS @jruales

Complexity: 3

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This milestone we started implementing the functionality to mark a change made during a session as reviewed/unreviewed. We first focused on storing the "reviewed/unreviewed" state so the functionality is only available in the Agents window for the "Branch Changes" changeset in the multi-file diff editor. Next milestone we will focus on polishing the UX but we want to make sure that the foundational pieces are working as expected.

Prerequisites

• Latest VS Code Insiders
• Ensure that you have the "chat.agentHost.enabled": true setting enabled

Testplan

• Open the Agents window ans start a new Copilot session
• Send a prompt that will results in some files being edited/created
• In the "Changes" view click on a file which will open the multi-file diff editor
  • Confirm that on the toolbar for each file there is an action to "Mark as Reviewed"
• Click on the "Mark as Reviewed" action
  • Confirm that the file is getting collapsed
  • Confirm that the action becomes toggled and the tooltip changes
• Expand the file, and make a change to the contents manually
  • Confirm that the "reviewed" state gets unset and the action does not appear as toggled
• Undo the change that you have done manually
  • Confirm that the "reviewed" state gets set and the action appear as toggled
• Send another prompt that would make some changes to the same file
  • Confrim that at the end of the turn the "reviewed" state gets unset and the action does not appear as toggled
• Switch to the "Uncommitted Changes" changes in the "Changes" view while the multi-file diff editor is opened
  • Confirm that the "Mark as Reviewed" action does not appear in the multi-file diff editor