{ss: SeatSeconds(1), expectFloat: 1.0 / ssScale, expectStr: "0.00000001ss"},
		{ss: SeatSeconds(ssScale - 1), expectFloat: (ssScale - 1) / ssScale, expectStr: "0.99999999ss"},
		{ss: 0, expectFloat: 0, expectStr: "0.00000000ss"},
		{ss: SeatsTimesDuration(1, time.Second), expectFloat: 1, expectStr: "1.00000000ss"},
		{ss: SeatsTimesDuration(123, 100*time.Millisecond), expectFloat: 12.3, expectStr: "12.30000000ss"},

	{"2.2ms", 2200 * Microsecond},
	{"3.3s", 3300 * Millisecond},
	{"4m5s", 4*Minute + 5*Second},
	{"4m5.001s", 4*Minute + 5001*Millisecond},
	{"5h6m7.001s", 5*Hour + 6*Minute + 7001*Millisecond},
	{"8m0.000000001s", 8*Minute + 1*Nanosecond},
	{"2562047h47m16.854775807s", 1<<63 - 1},
	{"-2562047h47m16.854775808s", -1 << 63},
}

func TestDurationString(t *testing.T) {
	for _, tt := range durationTests {

}

// format formats the representation of d into the end of buf and
// returns the offset of the first character.
func (d Duration) format(buf *[32]byte) int {
	// Largest time is 2540400h10m10.000000000s
	w := len(buf)

	u := uint64(d)
	neg := d < 0
	if neg {
		u = -u
	}

	if u < uint64(Second) {
		// Special case: if duration is smaller than a second,
		// use smaller units, like 1.2ms