Function TestHelperPrototypeSurface

deps/v8/test/mjsunit/harmony/iterator-concat.js:7–18

(helper)

// Flags: --js-iterator-sequencing

function TestHelperPrototypeSurface(helper) {
  const proto = Object.getPrototypeOf(helper);
  assertEquals('Iterator Helper', proto[Symbol.toStringTag]);
  assertTrue(Object.hasOwn(proto, 'next'));
  assertTrue(Object.hasOwn(proto, 'return'));
  assertEquals('function', typeof proto.next);
  assertEquals('function', typeof proto.return);
  assertEquals(0, proto.next.length);
  assertEquals(0, proto.return.length);
  assertEquals('next', proto.next.name);
  assertEquals('return', proto.return.name);
}

// --- Test concat helper