public void TextLongerThan140IsNotTweet()
        {
            var solver        = new ProblemSolver2165();
            var text141Length = new string('t', 141);
            var answer        = solver.IsTweet(text141Length);

            answer.Should().BeFalse();
        }
        public void Text140InLengthIsTweet()
        {
            var solver        = new ProblemSolver2165();
            var text141Length = new string('t', 140);
            var answer        = solver.IsTweet(text141Length);

            answer.Should().BeTrue();
        }