public void GetCodePointArgumentException()
{
Assert.Throws <ArgumentNullException>(() => UnicodeUtility.GetCodePoint(null !, 0));
Assert.Throws <ArgumentOutOfRangeException>(() => UnicodeUtility.GetCodePoint(new StringBuilder("a"), -1));
Assert.Throws <ArgumentOutOfRangeException>(() => UnicodeUtility.GetCodePoint(new StringBuilder("a"), 1));
Assert.Throws <ArgumentOutOfRangeException>(() => UnicodeUtility.GetCodePoint(new StringBuilder("\uD800"), 0));
}
public void GetCodePoint(string s, int index, int expected)
{
StringBuilder sb = new StringBuilder(s);
Assert.AreEqual(expected, UnicodeUtility.GetCodePoint(sb, index));
Assert.AreEqual(char.ConvertToUtf32(s, index), UnicodeUtility.GetCodePoint(sb, index));
}