public void TestColumn()
        {
            var result = new String();

            result.Append("<td>");
            result.Append("{{row.a?'是':'否'}}");
            result.Append("</td>");

            Assert.Equal(result.ToString(), _builder.ToString());
        }
        public void TestEmpty()
        {
            var result = new String();

            result.Append("<td>");
            result.Append("</td>");

            _builder = new BoolColumnBuilder("", null);
            _builder.Init();
            Assert.Equal(result.ToString(), _builder.ToString());
        }
        public void TestContent()
        {
            var result = new String();

            result.Append("<td>");
            result.Append("content");
            result.Append("</td>");

            var content = new DefaultTagHelperContent();

            content.AppendHtml("content");
            _builder = new BoolColumnBuilder("a", content);
            _builder.Init();
            Assert.Equal(result.ToString(), _builder.ToString());
        }