Frame-offset-04.js

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// frame.offset works in async fns.

load(libdir + "asserts.js");

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

var dbg = new Debugger(g);

g.eval(`

async function f() {

  await Promise.resolve();

`);

const ranges = [];

let script;

let frame;

dbg.onEnterFrame = function(f) {

  if (frame) {

    assertEq(f, frame);

    assertEq(f.script, script);

  } else {

    frame = f;

    script = f.script;

    assertEq(frame instanceof Debugger.Frame, true);

    assertEq(script instanceof Debugger.Script, true);

  const range = [script.getOffsetMetadata(frame.offset).lineNumber, null];

  ranges.push(range);

  f.onPop = () => {

    range[1] = script.getOffsetMetadata(frame.offset).lineNumber;

};

};

(async () => {

  const promise = g.f();

  assertEq(ranges.length, 1);

  assertEq(ranges[0][0], 2);

  assertEq(ranges[0][1], 3);

  assertEq(script.getOffsetMetadata(frame.offset).lineNumber, 3);

  await promise;

  assertEq(ranges.length, 2);

  assertEq(ranges[1][0], 3);

  assertEq(ranges[1][1], 4);

  // The frame has finished evaluating, so the callee is no longer accessible.

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

})();