public void TestMapAcrossDictionaryUsesKeys()
{
string template = "<foo:{f | <f>}>"; // checks field and method getter
Template st = new Template(template);
st.Add("foo", new SortedDictionary<string, string>() { { "a", "b" }, { "c", "d" } });
string expected = "ac";
string result = st.Render();
Assert.AreEqual(expected, result);
}