The Tor Browser / file revision

 // evalWithBindings basics

 var g = newGlobal();

 var dbg = new Debugger(g);

 var hits = 0;

 dbg.onDebuggerStatement = function (frame) {

     assertEq(frame.evalWithBindings("x", {x: 2}).return, 2);

     assertEq(frame.evalWithBindings("x + y", {x: 2}).return, 5);

     hits++;

 };

 // in global code

 g.y = 3;

 g.eval("debugger;");

 // in function code

 g.y = "fail";

 g.eval("function f(y) { debugger; }");

 g.f(3);

 // in direct eval code

 g.eval("function f() { var y = 3; eval('debugger;'); }");

 g.f();

 // in strict eval code with var

 g.eval("function f() { 'use strict'; eval('var y = 3; debugger;'); }");

 g.f();

 // in a with block

 g.eval("with ({y: 3}) { debugger; }");

 // shadowing

 g.eval("let (x = 50, y = 3) { debugger; }");

 assertEq(hits, 6);