Frame-older-generators-05.js

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// Test that Debugger.Frame.prototype.older works on suspended async generators.

load(libdir + "asserts.js");

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

const dbg = new Debugger(g);

g.eval(`

async function* f() {

  await Promise.resolve();

`);

let frame;

dbg.onEnterFrame = f => {

  frame = f;

  dbg.onEnterFrame = undefined;

};

(async () => {

  const it = g.f();

  assertEq(frame.older, null);

  const promise = it.next();

  assertEq(frame.older, null);

  await promise;

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

})();