OpenTween.Twitter.GetTextLengthRemain C# (CSharp) Method

        public int GetTextLengthRemain(string postText)
        {
            var matchDm = Twitter.DMSendTextRegex.Match(postText);
            if (matchDm.Success)
                return this.GetTextLengthRemainInternal(matchDm.Groups["body"].Value, isDm: true);

            return this.GetTextLengthRemainInternal(postText, isDm: false);
        }

 public void GetTextLengthRemain_SurrogatePairTest()
 {
     using (var twitter = new Twitter())
     {
         Assert.Equal(139, twitter.GetTextLengthRemain("🍣"));
         Assert.Equal(133, twitter.GetTextLengthRemain("🔥🐔🔥 焼き鳥"));
     }
 }