private static void TrySplitOnFirst(String8 value, byte splitter, string firstExpected, string secondExpected)
{
String8 first, second;
Assert.AreEqual(!(firstExpected.Length == 0 && secondExpected.Length == 0), value.SplitOnFirst(splitter, out first, out second));
Assert.AreEqual(firstExpected, first.ToString());
Assert.AreEqual(secondExpected, second.ToString());
}