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// Copyright 2018 Valerie Young. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-asyncgenerator-prototype-throw
description: throw rejects promise when `this` value is not an async generator
info: |
AsyncGenerator.prototype.throw ( exception )
1. Let generator be the this value.
2. Let completion be Completion{[[Type]]: throw, [[Value]]: exception,
[[Target]]: empty}.
3. Return ! AsyncGeneratorEnqueue(generator, completion).
AsyncGeneratorEnqueue ( generator, completion )
...
3. If Type(generator) is not Object, or if generator does not have an
[[AsyncGeneratorState]] internal slot, then
a. Let badGeneratorError be a newly created TypeError object.
b. Perform ! Call(promiseCapability.[[Reject]], undefined, « badGeneratorError »).
c. Return promiseCapability.[[Promise]].
flags: [async]
features: [async-iteration]
---*/
async function* g() {}
var AsyncGeneratorPrototype = Object.getPrototypeOf(g).prototype;
function* syncGenerator() {}
var syncIterator = syncGenerator()
var testPromises = [
AsyncGeneratorPrototype.throw.call({}).then(
function () {
throw new Test262Error("AsyncGeneratorPrototype.throw should reject promise" +
" when `this` value is an object");
},
function (e) {
if (!(e instanceof TypeError)) {
throw new Test262Error("(object) expected TypeError but got " + e);
}
}
),
AsyncGeneratorPrototype.throw.call(function() {}).then(
function () {
throw new Test262Error("AsyncGeneratorPrototype.throw should reject promise" +
" when `this` value is a function");
},
function (e) {
if (!(e instanceof TypeError)) {
throw new Test262Error("(function) expected TypeError but got " + e);
}
}
),
AsyncGeneratorPrototype.throw.call(g).then(
function () {
throw new Test262Error("AsyncGeneratorPrototype.throw should reject promise" +
" when `this` value is an async generator function");
},
function (e) {
if (!(e instanceof TypeError)) {
throw new Test262Error("(async generator function) expected TypeError but got " + e);
}
}
),
AsyncGeneratorPrototype.throw.call(g.prototype).then(
function () {
throw new Test262Error("AsyncGeneratorPrototype.throw should reject promise" +
" when `this` value is an async generator function prototype object");
},
function (e) {
if (!(e instanceof TypeError)) {
throw new Test262Error("(async generator function prototype) expected TypeError but got " + e);
}
},
),
AsyncGeneratorPrototype.throw.call(syncIterator).then(
function () {
throw new Test262Error("AsyncGeneratorPrototype.throw should reject promise" +
" when `this` value is a generator");
},
function (e) {
if (!(e instanceof TypeError)) {
throw new Test262Error("(generator) expected TypeError but got " + e);
}
}
)
]
Promise.all(testPromises).then(() => {}).then($DONE, $DONE)
|
