michael@0: // frame.environment can be called from the onEnterFrame hook.
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.eval("function f(x) { return 2 * x; }");
michael@0: var dbg = Debugger(g);
michael@0: var hits = 0;
michael@0: dbg.onEnterFrame = function (frame) {
michael@0:     assertEq(frame.environment.names().join(","), "arguments,x");
michael@0:     hits++;
michael@0: };
michael@0: assertEq(g.f(22), 44);
michael@0: assertEq(hits, 1);