want Duration
}{
	{0, 0},
	{1, 1},
	{-1, 1},
	{1 * Minute, 1 * Minute},
	{-1 * Minute, 1 * Minute},
	{minDuration, maxDuration},
	{minDuration + 1, maxDuration},
	{minDuration + 2, maxDuration - 1},
	{maxDuration, maxDuration},
	{maxDuration - 1, maxDuration - 1},
}

func TestDurationAbs(t *testing.T) {
	for _, tt := range durationAbsTests {
		if got := tt.d.Abs(); got != tt.want {

		return d - r
	}
	if d1 := d + m - r; d1 > d {
		return d1
	}
	return maxDuration // overflow
}

// Abs returns the absolute value of d.
// As a special case, [math.MinInt64] is converted to [math.MaxInt64].
func (d Duration) Abs() Duration {
	switch {
	case d >= 0:
		return d
	case d == minDuration:
		return maxDuration
	default:
		return -d
	}
}

// Add returns the time t+d.