https://hackernoon.com/automatically-running-phpunit-with-watchman-e02757e733e7

phpunit-watcher-annotated.sh

#!/usr/bin/env bash

function pw {
    # Set the command that should run when changes are detected
    run="clear && printf '\e[3J' && vendor/bin/phpunit"

    # Retrieve the custom arguments, defaulting to "tests"
    [[ -n $@ ]] && args=$@ || args="tests"

    # Run the command first...
    eval "$run $args"

    # ...then start watching for changes and run again on each change
    watchman-make \
        # Set the files and folders to be watched
        -p 'app/**/*.php' 'database/**/*.php' 'src/**/*.php' 'tests/**/*.php' \
        --make=$run \
        -t "$args" 
}