public void ConsWorks()
{
MapEntry me = new MapEntry(1, "abc");
IPersistentVector v1 = me.cons(2);
Expect(me.count(), EqualTo(2));
Expect(me.key(), EqualTo(1));
Expect(me.val(), EqualTo("abc"));
Expect(v1.count(), EqualTo(3));
Expect(v1.nth(0), EqualTo(1));
Expect(v1.nth(1), EqualTo("abc"));
Expect(v1.nth(2), EqualTo(2));
}