public void testJson()
{
// Arrange.
HRef hrefTest = HRef.make("a");
HStr str = HStr.make("string");
List <HVal> items = new List <HVal>();
items.Add(hrefTest);
items.Add(str);
HList list = HList.make(items);
// Act.
var json = list.toJson();
// Assert.
Assert.AreEqual("[{\"_kind\":\"ref\",\"val\":\"a\",\"dis\":null},\"string\"]", json);
}