blob: b1b47f019590849d9e71276a8f76a1b1a7d2bd9e [file] [log] [blame]
'use strict';
if (self.importScripts) {
self.importScripts('/resources/testharness.js');
}
promise_test(() => {
const stream = new ReadableStream({
start(c) {
c.close();
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const view = new Uint8Array([1, 2, 3]);
return reader.read(view).then(({ value, done }) => {
// Sanity checks
assert_true(value instanceof Uint8Array, 'The value read must be a Uint8Array');
assert_not_equals(value, view, 'The value read must not be the *same* Uint8Array');
assert_array_equals(value, [], 'The value read must be an empty Uint8Array, since the stream is closed');
assert_true(done, 'done must be true, since the stream is closed');
// The important assertions
assert_not_equals(value.buffer, view.buffer, 'a different ArrayBuffer must underlie the value');
assert_equals(view.buffer.byteLength, 0, 'the original buffer must be detached');
});
}, 'ReadableStream with byte source: read()ing from a closed stream still transfers the buffer');
promise_test(() => {
const stream = new ReadableStream({
start(c) {
c.enqueue(new Uint8Array([1, 2, 3]));
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const view = new Uint8Array([4, 5, 6]);
return reader.read(view).then(({ value, done }) => {
// Sanity checks
assert_true(value instanceof Uint8Array, 'The value read must be a Uint8Array');
assert_not_equals(value, view, 'The value read must not be the *same* Uint8Array');
assert_array_equals(value, [1, 2, 3], 'The value read must be the enqueued Uint8Array, not the original values');
assert_false(done, 'done must be false, since the stream is not closed');
// The important assertions
assert_not_equals(value.buffer, view.buffer, 'a different ArrayBuffer must underlie the value');
assert_equals(view.buffer.byteLength, 0, 'the original buffer must be detached');
});
}, 'ReadableStream with byte source: read()ing from a stream with queued chunks still transfers the buffer');
test(() => {
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array([1, 2, 3]);
c.enqueue(view);
assert_throws(new TypeError(), () => c.enqueue(view), 'enqueuing an already-detached buffer must throw');
},
type: 'bytes'
});
}, 'ReadableStream with byte source: enqueuing an already-detached buffer throws');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
c.enqueue(new Uint8Array([1, 2, 3]));
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const view = new Uint8Array([4, 5, 6]);
return reader.read(view).then(() => {
// view is now detached
return promise_rejects(t, new TypeError(), reader.read(view),
'read(view) must reject when given an already-detached buffer');
});
}, 'ReadableStream with byte source: reading into an already-detached buffer rejects');
async_test(t => {
const stream = new ReadableStream({
pull: t.step_func_done(c => {
// Detach it by reading into it
reader.read(c.byobRequest.view);
assert_throws(new TypeError(), () => c.byobRequest.respond(1),
'respond() must throw if the corresponding view has become detached');
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
reader.read(new Uint8Array([4, 5, 6]));
}, 'ReadableStream with byte source: respond() throws if the BYOB request\'s buffer has been detached (in the ' +
'readable state)');
async_test(t => {
const stream = new ReadableStream({
pull: t.step_func_done(c => {
// Detach it by reading into it
reader.read(c.byobRequest.view);
c.close();
assert_throws(new TypeError(), () => c.byobRequest.respond(0),
'respond() must throw if the corresponding view has become detached');
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
reader.read(new Uint8Array([4, 5, 6]));
}, 'ReadableStream with byte source: respond() throws if the BYOB request\'s buffer has been detached (in the ' +
'closed state)');
async_test(t => {
const stream = new ReadableStream({
pull: t.step_func_done(c => {
// Detach it by reading into it
const view = new Uint8Array([1, 2, 3]);
reader.read(view);
assert_throws(new TypeError(), () => c.byobRequest.respondWithNewView(view),
'respondWithNewView() must throw if passed a detached view');
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
reader.read(new Uint8Array([4, 5, 6]));
}, 'ReadableStream with byte source: respondWithNewView() throws if the supplied view\'s buffer has been detached ' +
'(in the readable state)');
async_test(t => {
const stream = new ReadableStream({
pull: t.step_func_done(c => {
// Detach it by reading into it
const view = new Uint8Array([1, 2, 3]);
reader.read(view);
c.close();
const zeroLengthView = new Uint8Array(view.buffer, 0, 0);
assert_throws(new TypeError(), () => c.byobRequest.respondWithNewView(zeroLengthView),
'respondWithNewView() must throw if passed a (zero-length) view whose buffer has been detached');
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
reader.read(new Uint8Array([4, 5, 6]));
}, 'ReadableStream with byte source: respondWithNewView() throws if the supplied view\'s buffer has been detached ' +
'(in the closed state)');
done();