contextValue 
  Context value of the test item. This can be used to contribute message- specific actions to the test peek view. The value set here can be found in the testMessage property of the following menus contribution points:
testing/message/context- context menu for the message in the results treetesting/message/content- a prominent button overlaying editor content where the message is displayed.
For example:
"contributes": {
  "menus": {
    "testing/message/content": [
      {
        "command": "extension.deleteCommentThread",
        "when": "testMessage == canApplyRichDiff"
      }
    ]
  }
}Content copied to clipboard
The command will be called with an object containing:
test: the TestItem the message is associated with, if it is still present in the TestController.items collection.message: the TestMessage instance.