{"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 {
		if str := tt.d.String(); str != tt.str {