"testing"
	"time"
)

// TestSeatSecondsString exercises the SeatSeconds constructor and de-constructors (String, ToFloat).
func TestSeatSecondsString(t *testing.T) {
	testCases := []struct {
		ss          SeatSeconds
		expectFloat float64
		expectStr   string
	}{
		{ss: SeatSeconds(1), expectFloat: 1.0 / ssScale, expectStr: "0.00000001ss"},
		{ss: SeatSeconds(ssScale - 1), expectFloat: (ssScale - 1) / ssScale, expectStr: "0.99999999ss"},

// MinSeatSeconds is the lowest representable value of SeatSeconds
const MinSeatSeconds = SeatSeconds(0)

// SeatsTimeDuration produces the SeatSeconds value for the given factors.
// This is intended only to produce small values, increments in work
// rather than amount of work done since process start.
func SeatsTimesDuration(seats float64, duration time.Duration) SeatSeconds {

	arrivalR fcrequest.SeatSeconds

	// startTime is the real time when the request began executing
	startTime time.Time

	// Indicates whether client has called Request::Wait()
	waitStarted bool
}

type completedWorkEstimate struct {
	fcrequest.WorkEstimate
	totalWork fcrequest.SeatSeconds // initial plus final work
	finalWork fcrequest.SeatSeconds // only final work
}

	update := func(we *queueSum, req *request, multiplier int) {
		we.InitialSeatsSum += multiplier * req.InitialSeats()
		we.MaxSeatsSum += multiplier * req.MaxSeats()
		we.TotalWorkSum += fcrequest.SeatSeconds(multiplier) * req.totalWork()
	}

	assert := func(t *testing.T, want, got *queueSum) {
		if !reflect.DeepEqual(want, got) {
			t.Errorf("Expected queue work estimate to match, diff: %s", cmp.Diff(want, got))
		}

	queues []*queue

	// currentR is the amount of seat-seconds allocated per queue since process startup.
	// This is our generalization of the progress meter named R in the original fair queuing work.
	currentR fqrequest.SeatSeconds

	// lastRealTime is what `clock.Now()` yielded when `virtualTime` was last updated
	lastRealTime time.Time

	// robinIndex is the index of the last queue dispatched
	robinIndex int

		counter:                     counter,
		seatDemandIntegratorSubject: seatDemandIntegratorSubject,
	}.exercise(t)
}

// TestSeatSecondsRollover checks that there is not a problem with SeatSeconds overflow.
func TestSeatSecondsRollover(t *testing.T) {
	metrics.Register()
	now := time.Now()

	const Quarter = 91 * 24 * time.Hour

	clk, counter := testeventclock.NewFake(now, 0, nil)