iter-value-unspecified.js

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// Copyright (C) 2013 the V8 project authors. All rights reserved.

// This code is governed by the BSD license found in the LICENSE file.

/*---

es6id: 25.2

description: >

    When the `next` method of a generator-produced iterable is invoked without

    an argument, the corresponding `yield` expression should be evaluated as

    `undefined`.

features: [generators]

---*/

function* g() { actual = yield; }

var iter = g();

var actual, result;

result = iter.next();

assert.sameValue(result.value, undefined);

assert.sameValue(result.done, false);

assert.sameValue(actual, undefined);

result = iter.next();

assert.sameValue(result.value, undefined);

assert.sameValue(result.done, true);

assert.sameValue(actual, undefined);

reportCompare(0, 0);