Frame-this-10.js - mozsearch

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// Check the Frame.this getter always returns the same object for a given frame.

// Primitive this-values should not be boxed multiple times.

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

var dbg = new Debugger(g);

var framesEntered = 0;

var framesPopped = 0;

var numSteps = 0;

dbg.onEnterFrame = function (frame) {

    if (frame.type === 'eval')

        return;

    framesEntered++;

    var frameThis = frame.this;

    assertEq(frame.this, frameThis);

    frame.onPop = function() {

        framesPopped++;

        assertEq(frame.this, frameThis);

};

    frame.onStep = function() {

        numSteps++;

        assertEq(frame.this, frameThis);

    g.gotThis = frameThis.unsafeDereference();

};

g.eval("function nonstrictfun() { return this; }");

g.eval("nonstrictfun.call(Math); assertEq(gotThis, Math);");

g.eval("nonstrictfun.call(true); assertEq(gotThis.valueOf(), true);");

g.eval("nonstrictfun.call(); assertEq(gotThis, this);");

g.eval("function nonstrictfunNoThis() { return 1; }");

g.eval("nonstrictfunNoThis.call(Math); assertEq(gotThis, Math);");

g.eval("nonstrictfunNoThis.call(true); assertEq(gotThis.valueOf(), true);");

g.eval("nonstrictfunNoThis.call(); assertEq(gotThis, this);");

assertEq(framesEntered, 6);

assertEq(framesPopped, 6);

assertEq(numSteps > 15, true);