Unit test produces no output no error.

import std.stdio;

import arsd.script;
import arsd.jsvar;

alias ClickHandler = void delegate(int x, int y);

class Window
{
    void addOnClick(ClickHandler ch)
    {
        clickHandlers ~= ch;
    }

    void click(int x, int y)
    {
        foreach(ch ; clickHandlers)
        {
            ch(x, y);
        }
    }

    private ClickHandler[] clickHandlers;
}

void print(const string s)
{
    writeln(s);
}

void main(string [] args)
{
    var globals = var.emptyObject;
    globals.print = &print;
    globals["Window"] = subclassable!Window;

    interpret(q{
        var window = new Window();
        window.addOnClicked(function(x,y){
            print("Clicked! " ~ x ~ " " ~ y);
        });
        window.click(25, 30);
    }, globals);
}

unittest
{
    Window window = new Window;
    window.addOnClick((x,y){writeln(x," ",y);});
    window.addOnClick((x,y){writeln("Second click!");});
    window.click(42, 69);
}