private List <string> CheckText
        (
            [CanBeNull] string text
        )
        {
            List <string> result = new List <string>();

            if (!string.IsNullOrEmpty(text))
            {
                Match match = _mixRegex.Match(text);
                while (match.Success)
                {
                    CharacterClass classes = CharacterClassifier
                                             .DetectCharacterClasses
                                             (
                        match.Value
                                             );
                    if (CharacterClassifier.IsBothCyrillicAndLatin(classes))
                    {
                        result.Add(match.Value);
                    }
                }
            }

            return(result);
        }
        public void CharacterClassifier_DetectCharacterClasses_5()
        {
            string         text = "\r\n";
            CharacterClass classes
                = CharacterClassifier.DetectCharacterClasses(text);

            Assert.AreEqual(CharacterClass.ControlCharacter, classes);
        }
        public void CharacterClassifier_DetectCharacterClasses_4()
        {
            string         text = "2128506";
            CharacterClass classes
                = CharacterClassifier.DetectCharacterClasses(text);

            Assert.AreEqual(CharacterClass.Digit, classes);
        }
        public void CharacterClassifier_DetectCharacterClasses_3()
        {
            string         text = "Привет";
            CharacterClass classes
                = CharacterClassifier.DetectCharacterClasses(text);

            Assert.AreEqual(CharacterClass.Cyrillic, classes);
        }
        public void CharacterClassifier_DetectCharacterClasses_2()
        {
            string         text = "Hello";
            CharacterClass classes
                = CharacterClassifier.DetectCharacterClasses(text);

            Assert.AreEqual(CharacterClass.BasicLatin, classes);
        }
        public void CharacterClassifier_DetectCharacterClasses_1()
        {
            string         text = string.Empty;
            CharacterClass classes
                = CharacterClassifier.DetectCharacterClasses(text);

            Assert.AreEqual(CharacterClass.None, classes);
        }
        public void CharacterClassifier_DetectCharacterClasses_6()
        {
            string         text = "Hello, Привет, 2128506\r\n";
            CharacterClass classes
                = CharacterClassifier.DetectCharacterClasses(text);

            Assert.AreEqual
            (
                CharacterClass.BasicLatin
                | CharacterClass.ControlCharacter
                | CharacterClass.Cyrillic
                | CharacterClass.Digit,
                classes
            );
        }
        public void CharacterClassifier_IsBothCyrillicAndLatin_1()
        {
            string         text = "Hello, 2128506\r\n";
            CharacterClass classes
                = CharacterClassifier.DetectCharacterClasses(text);

            Assert.IsFalse(CharacterClassifier.IsBothCyrillicAndLatin(classes));

            text    = "Привет, 2128506\r\n";
            classes = CharacterClassifier.DetectCharacterClasses(text);
            Assert.IsFalse(CharacterClassifier.IsBothCyrillicAndLatin(classes));

            text    = "Hello, Привет, 2128506\r\n";
            classes = CharacterClassifier.DetectCharacterClasses(text);
            Assert.IsTrue(CharacterClassifier.IsBothCyrillicAndLatin(classes));

            text    = "2128506\r\n";
            classes = CharacterClassifier.DetectCharacterClasses(text);
            Assert.IsFalse(CharacterClassifier.IsBothCyrillicAndLatin(classes));
        }