QA:Testcase CoreOS switch stream

Description

This tests whether an existing Fedora CoreOS instance running on the stable stream can switch to the next stream.

Setup

1. Have access to a (or install a new) FCOS instance running the stable stream.

How to test

1. Verify that your FCOS system is running on stable:

   $ sudo rpm-ostree status
   State: idle
   Deployments:
   ● ostree://fedora:fedora/x86_64/coreos/stable
                      Version: 32.20201018.3.0 (2020-11-02T20:54:53Z)
                       Commit: a6f3e91ad6e0b8e132769c1694ed9b747a339c04e4e6256fce3afd81c85e1f1f
                 GPGSignature: Valid signature by 97A1AE57C3A2372CCA3A4ABA6C13026D12C944D0
   

   The black circle ● shows the currently booted tree (if you see multiple deployments available). The current tree should show fedora/x86_64/coreos/stable. The version may differ from the above output.

2. Follow the Update Streams documentation to switch your system to the next stream.
   • A package difference should be displayed during the switch operation for you to review.
3. Reboot
4. Verify that your system is now running on the next stream:

   $ sudo rpm-ostree status
   State: idle
   Deployments:
   ● ostree://fedora:fedora/x86_64/coreos/next
                      Version: 33.20201104.1.0 (2020-11-05T14:20:13Z)
                       Commit: f7bff56c9710b5fedb22d50651bcd875856bb83510f7115e10d21167bd9a3b75
                 GPGSignature: Valid signature by 963A2BEB02009608FE67EA4249FD77499570FF31
   
     ostree://fedora:fedora/x86_64/coreos/stable
                      Version: 32.20201018.3.0 (2020-11-02T20:54:53Z)
                       Commit: a6f3e91ad6e0b8e132769c1694ed9b747a339c04e4e6256fce3afd81c85e1f1f
                 GPGSignature: Valid signature by 97A1AE57C3A2372CCA3A4ABA6C13026D12C944D0
   

   The current tree should show fedora/x86_64/coreos/next. The version may differ from the above output.

Expected Results

1. The system successfully reboots and runs on the next stream.
2. The system is functional (you can connect the same way as before, your services are running as before).
3. The linked documentation is clear, all steps are understandable, and nothing important is missing from it.

Optional

1. Before switching to the next stream, try for example creating containers or configuring a service and verify that the changes are successfully carried over after switching.
2. After switching to the next stream, attempt both a temporary and a permanent manual rollback. After each rollback, verify that your system booted with the correct filesystem tree using sudo rpm-ostree status.