public void GetNextTextElementLength_Invalid()
{
AssertExtensions.Throws <ArgumentNullException>("str", () => StringInfo.GetNextTextElementLength(null)); // Str is null
AssertExtensions.Throws <ArgumentNullException>("str", () => StringInfo.GetNextTextElementLength(null, 0)); // Str is null
AssertExtensions.Throws <ArgumentOutOfRangeException>("index", () => StringInfo.GetNextTextElementLength("abc", -1)); // Index < 0
AssertExtensions.Throws <ArgumentOutOfRangeException>("index", () => StringInfo.GetNextTextElementLength("abc", 4)); // Index > str.Length
}
public void GetNextTextElementLength(string str, int index, string expected)
{
if (index == 0)
{
Assert.Equal(expected.Length, StringInfo.GetNextTextElementLength(str));
}
Assert.Equal(expected.Length, StringInfo.GetNextTextElementLength(str, index));
Assert.Equal(expected.Length, StringInfo.GetNextTextElementLength(str.AsSpan(index)));
}
