src/sys/pkg/bin/omaha-client/test_data/test_channel_config.json

{
  "version": "1",
  "content": {
    "channels": [
      {
        "name": "some-channel",
        "repo": "some-channel-repo",
        "appid": "some-channel-appid"
      },
      {
        "name": "some-other-channel",
        "repo": "some-other-channel-repo",
        "appid": "some-other-channel-appid"
      }
    ],
    "default_channel": "some-other-channel"
  }
}