{
  "tests": [
    {
      "description": "listen: no changes; empty snapshot",
      "comment": "There are no changes, so the snapshot should be empty.",
      "listen": {
        "responses": [
          {
            "targetChange": {
              "targetChangeType": "CURRENT"
            }
          },
          {
            "targetChange": {
              "readTime": "1970-01-01T00:00:01Z"
            }
          }
        ],
        "snapshots": [
          {
            "readTime": "1970-01-01T00:00:01Z"
          }
        ]
      }
    }
  ]
}