I've been involved with snapd, ubuntu-core and snaps for many years and I've recently created an integration-testing system that lets me test racket snap running on the IoT/embedded ubuntu-core distribution in a fully automated manner: racket-smoke-tests.
At present it only runs one hello-world program but I plan to run more tests over time. You can also expect to find more experiments and more operating systems tested there in coming days. The system is powered by Image Garden which provides test images for a number of Linux distributions and releases.