lazy-methods-pass-through-lastValue.js

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// |reftest| skip-if(!this.hasOwnProperty('Iterator'))

class TestIterator extends Iterator {

  next(value = "next value") {

    assertEq(arguments.length, 0);

    return {done: false, value};

const methods = [

  iter => iter.map(x => x),

  iter => iter.filter(x => true),

  iter => iter.take(2),

  iter => iter.drop(0),

];

for (const method of methods) {

  const iterator = new TestIterator();

  const iteratorHelper = method(iterator);

  iteratorHelper.next();

  let result = iteratorHelper.next('last value');

  assertEq(result.done, false);

  assertEq(result.value, 'next value');

if (typeof reportCompare == 'function')

  reportCompare(0, 0);