public void Test_Fields_WhenEmpty_ThrowsException()
        {
            SearchOptions fc = new SearchOptions();

            fc.Highlight(HighLightStyle.Html);
            Assert.Throws <ArgumentNullException>(() => fc.Fields());
        }
        public void Test_SupportsFields()
        {
            //will not throw ArgumentNullException
            SearchOptions fc = new SearchOptions();

            fc.Highlight(HighLightStyle.Html);
            fc.Fields("name", "style");
        }