public void GetMatchesTest()
        {
            string _source = @"
            i'm not running
            sanli is running
            lufeng is running
            xiaotian is running
            i'm not running
            ";
            string pattern = @"([a-z]+)\sis\s([a-z]+)";
            int    limit   = 0;

            IList <string[]> actual;

            actual = StringExtensionsMatch.GetMatches(_source, pattern, limit);

            int i = 0;

            Assert.AreEqual("sanli is running", actual[0][0]);
            Assert.AreEqual("sanli", actual[0][1]);
            Assert.AreEqual("running", actual[0][2]);
        }