@startuml
skinparam BackgroundColor F0F0F0

start
partition Initialization {
    :enforce pretest machine conditions:
    ** bluetooth turned off;
}

partition test-run {

    : set state:
     -power on
     -visibility off;
    : get device state;

    if (power is on \nvisibility is off )
        : change visibility;
    else (false=failure)
        stop
    endif

    : get device state;
    if (power is on \nvisibility is on )
        : change visibility;
    else (false=failure)
        stop
    endif

    : get device state;
    if  (power is on \nvisibility is off) then (success)
        stop
    else (false=failure)
        stop
    endif
}
@enduml