{"-2562047h47m16.854775808s", -1 << 63 * Nanosecond},
	// huge string; issue 15011.
	{"0.100000000000000000000h", 6 * Minute},
	// This value tests the first overflow check in leadingFraction.
	{"0.830103483285477580700h", 49*Minute + 48*Second + 372539827*Nanosecond},
}

func TestParseDuration(t *testing.T) {
	for _, tc := range parseDurationTests {
		d, err := ParseDuration(tc.in)
		if err != nil || d != tc.want {