Frame-constructing-03.js

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// Debugger.Frame.prototype.constructing on an async generator.

load(libdir + "asserts.js");

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

const dbg = Debugger(g);

g.eval(`

async function* f() {

  await Promise.resolve();

`);

let frame;

dbg.onEnterFrame = function(f) {

  frame = f;

  assertEq(frame.constructing, false);

};

(async () => {

  const it = g.f();

  assertEq(frame.constructing, false);

  frame = null;

  const promise = it.next();

  assertEq(!!frame, true);

  assertEq(frame.constructing, false);

  await promise;

  // Throws because the frame has terminated.

  assertThrowsInstanceOf(() => frame.constructing, Error);

})();