Please see MakeBusy how to write tests and to run it as docker images.
./run-test.sh Callflow/Device/Call.php
TAP version 13
ok 1 - KazooTests\Applications\Callflow\Call::testSomethingElse
ok 2 - KazooTests\Applications\Callflow\Call::testMain with data set #0 ('kamailio.kazoo')
1..2
You can also run tests with verbose output (to see what is going on):
./run-test-verbose.sh Callflow/Device/Call.php
Please see example log output