impl incr(key:string,default:num);

// We're testing that sequence will restart from Tick 1 after the last incr returns failure.
// This covers a previous bug where sequence would forever repeat from the last child to return RUNNING.
// "after_running_failure" in the test name means after something returns running, then later returns failure.
root main {
    retry(2) sequence {
        // Tick 1
        incr("tick",0)
        // Tick 2
        incr("tick",0)
        // Tick 3
        // Repeat is used to force incr to return RUNNING the first time.
        repeat(2) incr("tick",0)
        // Tick 4
        inverter incr("tick",0)
    }
}