public void Sorting_Maintains_existing_querystring_parameters()
{
_querystring["foo"] = "bar";
ColumnFor(x => x.Name);
_model.Sort(new GridSortOptions());
string expected = "<table class=\"grid\"><thead><tr><th><a href=\"/?Column=Name&Direction=Ascending&foo=bar\">Name</a></th></tr></thead><tbody><tr class=\"gridrow\"><td>Jeremy</td></tr></tbody></table>";
RenderGrid().ShouldEqual(expected);
}