Code review comment for lp:~canonical-platform-qa/ubuntu-system-tests/snap-channel-support

Looks good in general. I just have a couple of questions:

1. Why is beta the default channel? Once a "snap" silo is ready for QA, will the snap in question be automatically available in the beta channel?

2. I'm not sure yet about the workflow with Bileto but if the app is not available in the beta channel, I would just make the setup to fail. Installing the snap from --edge could lead us to test the wrong version of the app. right?

For example, let's say that there's a new silo for the calc snap v1.2, stable has 1.0 and edge has 1.1, if 1.2 is not uploaded to --beta, then we would end up executing the test cases against 1.1 and approving the 1.2 silo based on the 1.1 results

Thoughts?