{"0xabc", 12},
	{"0x8000", 16},
	{"0x80000000", 32},
	{"0x800000000000", 48},
	{"0x8000000000000000", 64},
	{"0x80000000000000000000", 80},
	{"-0x4000000000000000000000", 87},
}

func TestBitLen(t *testing.T) {
	for i, test := range bitLenTests {
		x, ok := new(Int).SetString(test.in, 0)
		if !ok {
			t.Errorf("#%d test input invalid: %s", i, test.in)
			continue
		}