public void RoundTripMinValueTest()
{
var converter = new BigIntegerConverter();
var s = converter.ConvertToString((BigInteger)long.MinValue - 1, null, new MemberMapData(null));
var bi = converter.ConvertFromString(s, null, new MemberMapData(null));
Assert.AreEqual((BigInteger)long.MinValue - 1, bi);
}