tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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Frame-callee-04.js (1028B)

      1 // Frame.prototype.callee for an async generator 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 it = 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 let lastFrame = frame;
     27 let lastCallee = callee;
     28 frame = null;
     29 callee = null;
     30 
     31 const promise = it.next();
     32 
     33 assertEq(callee, fObj);
     34 assertEq(frame.callee, callee);
     35 
     36 lastFrame = frame;
     37 lastCallee = callee;
     38 frame = null;
     39 callee = null;
     40 
     41 promise.then(() => {
     42  assertEq(frame, lastFrame);
     43  assertEq(callee, lastCallee);
     44 
     45  // The frame has finished evaluating, so the callee is no longer accessible.
     46  assertThrowsInstanceOf(() => frame.callee, Error);
     47 });