Script-01.js - mozsearch

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// We get the same Debugger.Script object instance each time we ask.

var global = newGlobal({newCompartment: true});

global.eval('function f() { debugger; }');

global.eval('function g() { debugger; }');

var debug = new Debugger(global);

function evalAndNoteScripts(prog) {

    var scripts = {};

    debug.onDebuggerStatement = function(frame) {

        if (frame.type == "call")

            assertEq(frame.script, frame.callee.script);

        scripts.frame = frame.script;

        if (frame.arguments[0])

            scripts.argument = frame.arguments[0].script;

};

    global.eval(prog);

    return scripts;

// If we create a frame for a function and pass it as a value, those should

// both yield the same Debugger.Script instance.

var scripts = evalAndNoteScripts('f(f)');

assertEq(scripts.frame, scripts.argument);

var fScript = scripts.argument;

// If we call a second time, we should still get the same instance.

scripts = evalAndNoteScripts('f(f)');

assertEq(scripts.frame, fScript);

assertEq(scripts.argument, fScript);

// If we call with a different argument, we should get a different Debugger.Script.

scripts = evalAndNoteScripts('f(g)');

assertEq(scripts.frame !== scripts.argument, true);

assertEq(scripts.frame, fScript);

var gScript = scripts.argument;

// See if we can get g via the frame.

scripts = evalAndNoteScripts('g(f)');

assertEq(scripts.frame !== scripts.argument, true);

assertEq(scripts.frame,    gScript);

assertEq(scripts.argument, fScript);

// Different closures made from the same 'function' expression should yield

// the same script.

global.eval('function gen1(x) { return function clo(y) { return x+y; }; }');

global.eval('var clo1 = gen1(42);');

global.eval('var clo2 = gen1("smoot");');

var scripts1 = evalAndNoteScripts('f(clo1)');

var scripts2 = evalAndNoteScripts('f(clo2)');

assertEq(scripts1.argument, scripts2.argument);

// Different closures made from the same 'function' declaration should yield

// the same script.

global.eval('function gen2(x) { function clo(y) { return x+y; }; return clo; }');

global.eval('var clo1 = gen2(42);');

global.eval('var clo2 = gen2("smoot");');

var scripts1 = evalAndNoteScripts('f(clo1)');

var scripts2 = evalAndNoteScripts('f(clo2)');

assertEq(scripts1.argument, scripts2.argument);

// Different closures made from the same 'function' statement should yield

// the same script.

global.eval('function gen3(x) { if (true) { function clo(y) { return x+y; }; return clo; } }');

global.eval('var clo1 = gen3(42);');

global.eval('var clo2 = gen3("smoot");');

var scripts1 = evalAndNoteScripts('f(clo1)');

var scripts2 = evalAndNoteScripts('f(clo2)');

assertEq(scripts1.argument, scripts2.argument);