tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

Frame-asyncPromise-03.js (711B)

      1 // Test the promise property on generator function frames.
      2 
      3 load(libdir + 'asserts.js');
      4 
      5 var g = newGlobal({ newCompartment: true });
      6 var dbg = Debugger(g);
      7 g.eval(`
      8 function* f() {
      9  debugger;
     10  yield;
     11  debugger;
     12 }
     13 `);
     14 
     15 let frame;
     16 const promises = [];
     17 dbg.onDebuggerStatement = function(f) {
     18  frame = f;
     19  promises.push(frame.asyncPromise);
     20 };
     21 
     22 const it = g.f();
     23 
     24 assertEq(promises.length, 0);
     25 
     26 it.next();
     27 
     28 assertEq(frame.asyncPromise, undefined);
     29 
     30 assertEq(promises.length, 1);
     31 assertEq(promises[0], undefined);
     32 
     33 it.next();
     34 
     35 // Frame has terminated, so accessing the property throws.
     36 assertThrowsInstanceOf(() => frame.asyncPromise, Error);
     37 
     38 assertEq(promises.length, 2);
     39 assertEq(promises[1], undefined);