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brand-checks.any.js
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brand-checks.any.js
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// META: global=worker,jsshell
// META: script=../resources/test-utils.js
'use strict';
let ReadableStreamBYOBReader;
let ReadableByteStreamController;
test(() => {
// It's not exposed globally, but we test a few of its properties here.
ReadableStreamBYOBReader = realRSBYOBReader().constructor;
assert_equals(ReadableStreamBYOBReader.name, 'ReadableStreamBYOBReader', 'ReadableStreamBYOBReader should be set');
}, 'Can get the ReadableStreamBYOBReader constructor indirectly');
test(() => {
// It's not exposed globally, but we test a few of its properties here.
ReadableByteStreamController = realRBSController().constructor;
assert_equals(ReadableByteStreamController.name, 'ReadableByteStreamController',
'ReadableByteStreamController should be set');
}, 'Can get the ReadableByteStreamController constructor indirectly');
function fakeRS() {
return Object.setPrototypeOf({
cancel() { return Promise.resolve(); },
getReader() { return realRSBYOBReader(); },
pipeThrough(obj) { return obj.readable; },
pipeTo() { return Promise.resolve(); },
tee() { return [realRS(), realRS()]; }
}, ReadableStream.prototype);
}
function realRS() {
return new ReadableStream();
}
function fakeRSBYOBReader() {
return Object.setPrototypeOf({
get closed() { return Promise.resolve(); },
cancel() { return Promise.resolve(); },
read() { return Promise.resolve({ value: undefined, done: true }); },
releaseLock() { return; }
}, ReadableStreamBYOBReader.prototype);
}
function realRSBYOBReader() {
return new ReadableStream({ type: 'bytes' }).getReader({ mode: 'byob' });
}
function fakeRBSController() {
return Object.setPrototypeOf({
close() { },
enqueue() { },
error() { }
}, ReadableByteStreamController.prototype);
}
function realRBSController() {
let controller;
new ReadableStream({
start(c) {
controller = c;
},
type: 'bytes'
});
return controller;
}
test(() => {
assert_throws_js(TypeError, () => new ReadableStreamBYOBReader(fakeRS()), 'constructor should throw');
}, 'ReadableStreamBYOBReader enforces a brand check on its argument');
promise_test(t => {
return getterRejectsForAll(t, ReadableStreamBYOBReader.prototype, 'closed',
[fakeRSBYOBReader(), realRS(), realRBSController(), undefined, null]);
}, 'ReadableStreamBYOBReader.prototype.closed enforces a brand check');
promise_test(t => {
return methodRejectsForAll(t, ReadableStreamBYOBReader.prototype, 'cancel',
[fakeRSBYOBReader(), realRS(), realRBSController(), undefined, null]);
}, 'ReadableStreamBYOBReader.prototype.cancel enforces a brand check');
promise_test(t => {
return methodRejectsForAll(t, ReadableStreamBYOBReader.prototype, 'read',
[fakeRSBYOBReader(), realRS(), realRBSController(), undefined, null], [new Uint8Array(1)]);
}, 'ReadableStreamBYOBReader.prototype.read enforces a brand check');
test(() => {
methodThrowsForAll(ReadableStreamBYOBReader.prototype, 'releaseLock',
[fakeRSBYOBReader(), realRS(), realRBSController(), undefined, null]);
}, 'ReadableStreamBYOBReader.prototype.releaseLock enforces a brand check');
test(() => {
assert_throws_js(TypeError, () => new ReadableByteStreamController(fakeRS()),
'Constructing a ReadableByteStreamController should throw');
}, 'ReadableByteStreamController enforces a brand check on its arguments');
test(() => {
assert_throws_js(TypeError, () => new ReadableByteStreamController(realRS()),
'Constructing a ReadableByteStreamController should throw');
}, 'ReadableByteStreamController can\'t be given a fully-constructed ReadableStream');
test(() => {
getterThrowsForAll(ReadableByteStreamController.prototype, 'byobRequest',
[fakeRBSController(), realRS(), realRSBYOBReader(), undefined, null]);
}, 'ReadableByteStreamController.prototype.byobRequest enforces a brand check');
test(() => {
methodThrowsForAll(ReadableByteStreamController.prototype, 'close',
[fakeRBSController(), realRS(), realRSBYOBReader(), undefined, null]);
}, 'ReadableByteStreamController.prototype.close enforces a brand check');
test(() => {
methodThrowsForAll(ReadableByteStreamController.prototype, 'enqueue',
[fakeRBSController(), realRS(), realRSBYOBReader(), undefined, null], [new Uint8Array(1)]);
}, 'ReadableByteStreamController.prototype.enqueue enforces a brand check');
test(() => {
methodThrowsForAll(ReadableByteStreamController.prototype, 'error',
[fakeRBSController(), realRS(), realRSBYOBReader(), undefined, null]);
}, 'ReadableByteStreamController.prototype.error enforces a brand check');
// ReadableStreamBYOBRequest can only be accessed asynchronously, so cram everything into one test.
promise_test(t => {
let ReadableStreamBYOBRequest;
const rs = new ReadableStream({
pull(controller) {
return t.step(() => {
const byobRequest = controller.byobRequest;
ReadableStreamBYOBRequest = byobRequest.constructor;
brandChecks();
byobRequest.respond(1);
});
},
type: 'bytes'
});
const reader = rs.getReader({ mode: 'byob' });
return reader.read(new Uint8Array(1));
function fakeRSBYOBRequest() {
return Object.setPrototypeOf({
get view() {},
respond() {},
respondWithNewView() {}
}, ReadableStreamBYOBRequest.prototype);
}
function brandChecks() {
for (const badController of [fakeRBSController(), realRS(), realRSBYOBReader(), undefined, null]) {
assert_throws_js(TypeError, () => new ReadableStreamBYOBRequest(badController, new Uint8Array(1)),
'ReadableStreamBYOBRequest constructor must throw for an invalid controller argument');
}
getterThrowsForAll(ReadableStreamBYOBRequest.prototype, 'view',
[fakeRSBYOBRequest(), realRS(), realRSBYOBReader(), realRBSController(), undefined, null]);
methodThrowsForAll(ReadableStreamBYOBRequest.prototype, 'respond',
[fakeRSBYOBRequest(), realRS(), realRSBYOBReader(), realRBSController(), undefined, null], [1]);
methodThrowsForAll(ReadableStreamBYOBRequest.prototype, 'respondWithNewView',
[fakeRSBYOBRequest(), realRS(), realRSBYOBReader(), realRBSController(), undefined, null],
[new Uint8Array(1)]);
}
}, 'ReadableStreamBYOBRequest enforces brand checks');