public void ObjectMembers()
{
Interpret(
@"var obj = {a: 1, b: 2};
var c1 = obj.members().size();
var own1 = obj.has_member('a');
var own2 = obj.has_member('c');")
.Equal("c1", 3)
.Equal("own1", true)
.Equal("own2", false);
}