throw-closes.js - mozsearch

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// When a generator function throws, the generator is closed.

load(libdir + "asserts.js");

load(libdir + "iteration.js");

// Star generator, next() throws.

function *g() {

    yield 1;

    yield 2;

    throw 3;

    yield 4;

var i = g();

assertIteratorNext(i, 1);

assertIteratorNext(i, 2);

assertThrowsValue(() => i.next(), 3);

assertIteratorDone(i);

assertIteratorDone(i);

// Star generator, throw() throws.

function *h() {

    yield 1;

    yield 2;

var i = h();

assertIteratorNext(i, 1);

assertThrowsValue(() => i.throw(4), 4);

assertIteratorDone(i);

// Star generator, return() throws.

function *h2() {

    try {

	yield 1;

	yield 2;

    } finally {

	throw 6;

var i = h2();

assertIteratorNext(i, 1);

assertThrowsValue(() => i.return(4), 6);

assertIteratorDone(i);