Frame-olderSavedFrame-01.js

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// An explicit async stack should be available via olderSavedFrame.

// This test makes sure that "main" shows up as an async saved frame

// instead of "older", even though "drainJobQueue()" is running inside of

// "main()" directly.

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

var dbg = new Debugger(g);

let done = false;

dbg.onDebuggerStatement = function (frame) {

  // This frame has an "olderSavedFrame" because "run()" is an async function

  // and those have explicit async stacks attached to them.

  const parent = frame.olderSavedFrame;

  assertEq(typeof parent.source, "string");

  assertEq(parent.line, 12);

  assertEq(parent.column, 3);

  assertEq(parent.asyncCause, "async");

  assertEq(parent.functionDisplayName, "main");

  done = true;

};

g.eval(`

let draining = false;

async function run() {

  await Promise.resolve();

  // Make sure that the test is running within "drainJobQueue()".

  assertEq(draining, true);

  debugger;

(function main() {

  run();

  // Force resumption of the "run" function.

  draining = true;

  drainJobQueue();

  draining = false;

})();

`);

assertEq(done, true);