js/src/jit-test/tests/debug/Frame-script-05.js


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// Frame.prototype.script for async function frames.

load(libdir + "asserts.js");

var g = newGlobal({ newCompartment: true });
var dbg = new Debugger(g);
g.eval(`
async function f() {
  await Promise.resolve()
}
`);

let frame;
let script;
dbg.onEnterFrame = function(f) {
  frame = f;
  script = frame.script;
};

const promise = g.f();

assertEq(frame instanceof Debugger.Frame, true);
assertEq(script instanceof Debugger.Script, true);
assertEq(frame.script, script);

const lastFrame = frame;
const lastScript = script;
frame = null;
script = null;

promise.then(() => {
  assertEq(frame, lastFrame);
  assertEq(script, lastScript);

  // The frame has finished evaluating, so the script is no longer accessible.
  assertThrowsInstanceOf(() => frame.script, Error);
});