public void CleanText_TextWithPuncuation_ReturnsTextWithoutPunctuation(string input, string expectedResult)
        {
            var result = ArticleSummarizer.CleanText(input);

            Assert.That(result, Is.EqualTo(expectedResult));
        }
        public void CleanText_TextWithUpperCase_ReturnsLowerCaseText(string input, string expectedResult)
        {
            var result = ArticleSummarizer.CleanText(input);

            Assert.That(result, Is.EqualTo(expectedResult));
        }