text: load(libdir + 'asserts.js');
  
  // Debugger rejects arguments that aren't cross-compartment wrappers.
  assertThrowsInstanceOf(function () { Debugger(null); }, TypeError);
  assertThrowsInstanceOf(function () { Debugger(true); }, TypeError);
  assertThrowsInstanceOf(function () { Debugger(42); }, TypeError);
  assertThrowsInstanceOf(function () { Debugger("bad"); }, TypeError);
  assertThrowsInstanceOf(function () { Debugger(function () {}); }, TypeError);
  assertThrowsInstanceOf(function () { Debugger(this); }, TypeError);
  assertThrowsInstanceOf(function () { new Debugger(null); }, TypeError);
  assertThrowsInstanceOf(function () { new Debugger(true); }, TypeError);
  assertThrowsInstanceOf(function () { new Debugger(42); }, TypeError);
  assertThrowsInstanceOf(function () { new Debugger("bad"); }, TypeError);
  assertThrowsInstanceOf(function () { new Debugger(function () {}); }, TypeError);
  assertThrowsInstanceOf(function () { new Debugger(this); }, TypeError);
  
  // From the main compartment, creating a Debugger on a sandbox compartment.
  var g = newGlobal('new-compartment');
  var dbg = new Debugger(g);
  assertEq(dbg instanceof Debugger, true);
  assertEq(Object.getPrototypeOf(dbg), Debugger.prototype);
  