Frame-asyncPromise-03.js

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// Test the promise property on generator function frames.

load(libdir + 'asserts.js');

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

var dbg = Debugger(g);

g.eval(`

function* f() {

  debugger;

  yield;

  debugger;

`);

let frame;

const promises = [];

dbg.onDebuggerStatement = function(f) {

  frame = f;

  promises.push(frame.asyncPromise);

};

const it = g.f();

assertEq(promises.length, 0);

it.next();

assertEq(frame.asyncPromise, undefined);

assertEq(promises.length, 1);

assertEq(promises[0], undefined);

it.next();

// Frame has terminated, so accessing the property throws.

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

assertEq(promises.length, 2);

assertEq(promises[1], undefined);