mozilla-central/testing/web-platform/tests/streams/readable-streams/owning-type.any.js (file symbol)

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Test Info:

// META: global=window,worker,shadowrealm
// META: script=../resources/test-utils.js
// META: script=../resources/rs-utils.js
'use strict';
test(() => {
new ReadableStream({ type: 'owning' }); // ReadableStream constructed with 'owning' type
}, 'ReadableStream can be constructed with owning type');
test(() => {
let startCalled = false;
const source = {
start(controller) {
assert_equals(this, source, 'source is this during start');
assert_true(controller instanceof ReadableStreamDefaultController, 'default controller');
startCalled = true;
},
type: 'owning'
};
new ReadableStream(source);
assert_true(startCalled);
}, 'ReadableStream of type owning should call start with a ReadableStreamDefaultController');
test(() => {
let startCalled = false;
const source = {
start(controller) {
controller.enqueue("a", { transfer: [] });
controller.enqueue("a", { transfer: undefined });
startCalled = true;
},
type: 'owning'
};
new ReadableStream(source);
assert_true(startCalled);
}, 'ReadableStream should be able to call enqueue with an empty transfer list');
test(() => {
let startCalled = false;
const uint8Array = new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8]);
const buffer = uint8Array.buffer;
let source = {
start(controller) {
startCalled = true;
assert_throws_js(TypeError, () => { controller.enqueue(buffer, { transfer : [ buffer ] }); }, "transfer list is not empty");
}
};
new ReadableStream(source);
assert_true(startCalled);
startCalled = false;
source = {
start(controller) {
startCalled = true;
assert_throws_js(TypeError, () => { controller.enqueue(buffer, { get transfer() { throw new TypeError(); } }) }, "getter throws");
}
};
new ReadableStream(source);
assert_true(startCalled);
}, 'ReadableStream should check transfer parameter');
promise_test(async () => {
const uint8Array = new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8]);
const buffer = uint8Array.buffer;
buffer.test = 1;
const source = {
start(controller) {
assert_equals(buffer.byteLength, 8);
controller.enqueue(buffer, { transfer : [ buffer ] });
assert_equals(buffer.byteLength, 0);
assert_equals(buffer.test, 1);
},
type: 'owning'
};
const stream = new ReadableStream(source);
const reader = stream.getReader();
const chunk = await reader.read();
assert_not_equals(chunk.value, buffer);
assert_equals(chunk.value.byteLength, 8);
assert_equals(chunk.value.test, undefined);
}, 'ReadableStream of type owning should transfer enqueued chunks');