public void CharacterLength()
{
string s1 = "1!a $\uE000";
StringBuilder sb1 = new StringBuilder(s1);
for (int nIndex = 0; nIndex < s1.Length; ++nIndex)
{
Assert.AreEqual(1, UnicodeUtility.GetCharacterLength(s1, nIndex));
Assert.AreEqual(1, UnicodeUtility.GetCharacterLength(s1, nIndex));
Assert.AreEqual(1, UnicodeUtility.GetCharacterLength(sb1, nIndex));
Assert.AreEqual(1, UnicodeUtility.GetCharacterLength(sb1, nIndex));
}
string s2 = "\uDF80\uD800";
StringBuilder sb2 = new StringBuilder(s2);
for (int nIndex = 0; nIndex < s2.Length; ++nIndex)
{
Assert.AreEqual(1, UnicodeUtility.GetCharacterLength(s2, nIndex));
Assert.AreEqual(1, UnicodeUtility.GetCharacterLength(sb2, nIndex));
}
string s3 = "\uD800\uDF80";
StringBuilder sb3 = new StringBuilder(s3);
Assert.AreEqual(2, UnicodeUtility.GetCharacterLength(s3, 0));
Assert.AreEqual(1, UnicodeUtility.GetCharacterLength(s3, 1));
Assert.AreEqual(2, UnicodeUtility.GetCharacterLength(sb3, 0));
Assert.AreEqual(1, UnicodeUtility.GetCharacterLength(sb3, 1));
}
public void CharacterLengthLargeIndex()
{
Assert.Throws <ArgumentOutOfRangeException>(() => UnicodeUtility.GetCharacterLength("a", 1));
Assert.Throws <ArgumentOutOfRangeException>(() => UnicodeUtility.GetCharacterLength(new StringBuilder("a"), 1));
}
public void CharacterLengthNullString()
{
Assert.Throws <ArgumentNullException>(() => UnicodeUtility.GetCharacterLength((string)null, 1));
Assert.Throws <ArgumentNullException>(() => UnicodeUtility.GetCharacterLength((StringBuilder)null, 1));
}
