tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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Frame-callee-03.js (871B)

      1 // Frame.prototype.callee for an async function frame.
      2 
      3 load(libdir + "asserts.js");
      4 
      5 var g = newGlobal({ newCompartment: true });
      6 var dbg = new Debugger(g);
      7 g.eval(`
      8 async function f() { await Promise.resolve(); }
      9 `);
     10 
     11 const fObj = dbg.makeGlobalObjectReference(g).makeDebuggeeValue(g.f);
     12 let frame;
     13 let callee;
     14 dbg.onEnterFrame = function(f) {
     15  frame = f;
     16  callee = frame.callee;
     17 };
     18 
     19 const promise = g.f();
     20 
     21 assertEq(frame instanceof Debugger.Frame, true);
     22 assertEq(callee instanceof Debugger.Object, true);
     23 assertEq(callee, fObj);
     24 assertEq(frame.callee, callee);
     25 
     26 const lastFrame = frame;
     27 const lastCallee = callee;
     28 frame = null;
     29 callee = null;
     30 
     31 promise.then(() => {
     32  assertEq(frame, lastFrame);
     33  assertEq(callee, lastCallee);
     34 
     35  // The frame has finished evaluating, so the callee is no longer accessible.
     36  assertThrowsInstanceOf(() => frame.callee, Error);
     37 });