michael@0: // The script and environment of a non-debuggee function are null.
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.eval('function f() { return "from f"; }');
michael@0: 
michael@0: var dbg = new Debugger;
michael@0: var gw = dbg.makeGlobalObjectReference(g);
michael@0: var fw = gw.getOwnPropertyDescriptor('f').value;
michael@0: 
michael@0: // g is not a debuggee, so we can't fetch f's script or environment.
michael@0: assertEq(fw.script, null);
michael@0: assertEq(fw.environment, null);
michael@0: 
michael@0: // If we add g as a debuggee, we can fetch f's script and environment.
michael@0: dbg.addDebuggee(g);
michael@0: var fscript = fw.script;
michael@0: var fenv = fw.environment;
michael@0: assertEq(fscript instanceof Debugger.Script, true);
michael@0: assertEq(fenv instanceof Debugger.Environment, true);
michael@0: 
michael@0: // Removing g as a debuggee makes the script and environment inaccessible again.
michael@0: dbg.removeDebuggee(g);
michael@0: assertEq(fw.script, null);
michael@0: assertEq(fw.environment, null);