package activator

import (
	"testing"
	"time"
)

// The wait between health probes starts short, so a fast app is noticed
// within milliseconds of binding, and doubles to a ceiling, so a slow one
// is not probed in a busy loop.
func TestHealthPollBacksOffFromShortToACeiling(t *testing.T) {
	var got []time.Duration
	d := time.Duration(0)
	for range 7 {
		d = nextHealthPoll(d)
		got = append(got, d)
	}
	want := []time.Duration{5, 10, 20, 40, 50, 50, 50}
	for i := range want {
		if got[i] != want[i]*time.Millisecond {
			t.Fatalf("delays = %v, want %v ms", got, want)
		}
	}
}