Okay, so the test suite could be a little bigger.
If you want to write more, please do.

The test suite assumes you have redis-cli and redis-server in the same
directory as all the shell scripts and php scripts. keys.test is a list of
all the keys that will be tested. start.sh starts 4 Redis servers, stop.sh
stops them, and redis-cluster.sh sends redis-cli commands to all 4 Redis
servers at once.