Frame-older-generators-03.js

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

load(libdir + "asserts.js");

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

const dbg = new Debugger(g);

g.eval(`

function* f() {}

`);

let frame;

dbg.onEnterFrame = f => {

  frame = f;

  dbg.onEnterFrame = undefined;

};

const it = g.f();

assertEq(frame.older, null);

it.next();

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