// META: global=window,worker,shadowrealm
// META: script=../resources/rs-utils.js
// META: script=../resources/test-utils.js
'use strict';
const error1 = new Error('error1');
error1.name = 'error1';
test(() => {
assert_throws_js(TypeError, () => new ReadableStream().getReader({ mode: 'byob' }));
}, 'getReader({mode: "byob"}) throws on non-bytes streams');
test(() => {
// Constructing ReadableStream with an empty underlying byte source object as parameter shouldn't throw.
new ReadableStream({ type: 'bytes' }).getReader({ mode: 'byob' });
// Constructor must perform ToString(type).
new ReadableStream({ type: { toString() {return 'bytes';} } })
.getReader({ mode: 'byob' });
new ReadableStream({ type: { toString: null, valueOf() {return 'bytes';} } })
.getReader({ mode: 'byob' });
}, 'ReadableStream with byte source can be constructed with no errors');
test(() => {
const ReadableStreamBYOBReader = new ReadableStream({ type: 'bytes' }).getReader({ mode: 'byob' }).constructor;
const rs = new ReadableStream({ type: 'bytes' });
let reader = rs.getReader({ mode: { toString() { return 'byob'; } } });
assert_true(reader instanceof ReadableStreamBYOBReader, 'must give a BYOB reader');
reader.releaseLock();
reader = rs.getReader({ mode: { toString: null, valueOf() {return 'byob';} } });
assert_true(reader instanceof ReadableStreamBYOBReader, 'must give a BYOB reader');
reader.releaseLock();
reader = rs.getReader({ mode: 'byob', notmode: 'ignored' });
assert_true(reader instanceof ReadableStreamBYOBReader, 'must give a BYOB reader');
}, 'getReader({mode}) must perform ToString()');
promise_test(() => {
let startCalled = false;
let startCalledBeforePull = false;
let desiredSize;
let controller;
let resolveTestPromise;
const testPromise = new Promise(resolve => {
resolveTestPromise = resolve;
});
new ReadableStream({
start(c) {
controller = c;
startCalled = true;
},
pull() {
startCalledBeforePull = startCalled;
desiredSize = controller.desiredSize;
resolveTestPromise();
},
type: 'bytes'
}, {
highWaterMark: 256
});
return testPromise.then(() => {
assert_true(startCalledBeforePull, 'start should be called before pull');
assert_equals(desiredSize, 256, 'desiredSize should equal highWaterMark');
});
}, 'ReadableStream with byte source: Construct and expect start and pull being called');
promise_test(() => {
let pullCount = 0;
let checkedNoPull = false;
let resolveTestPromise;
const testPromise = new Promise(resolve => {
resolveTestPromise = resolve;
});
let resolveStartPromise;
new ReadableStream({
start() {
return new Promise(resolve => {
resolveStartPromise = resolve;
});
},
pull() {
if (checkedNoPull) {
resolveTestPromise();
}
++pullCount;
},
type: 'bytes'
}, {
highWaterMark: 256
});
Promise.resolve().then(() => {
assert_equals(pullCount, 0);
checkedNoPull = true;
resolveStartPromise();
});
return testPromise;
}, 'ReadableStream with byte source: No automatic pull call if start doesn\'t finish');
test(() => {
assert_throws_js(Error, () => new ReadableStream({ start() { throw new Error(); }, type:'bytes' }),
'start() can throw an exception with type: bytes');
}, 'ReadableStream with byte source: start() throws an exception');
promise_test(t => {
new ReadableStream({
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
}, {
highWaterMark: 0
});
return Promise.resolve();
}, 'ReadableStream with byte source: Construct with highWaterMark of 0');
test(() => {
new ReadableStream({
start(c) {
assert_equals(c.desiredSize, 10, 'desiredSize must start at the highWaterMark');
c.close();
assert_equals(c.desiredSize, 0, 'after closing, desiredSize must be 0');
},
type: 'bytes'
}, {
highWaterMark: 10
});
}, 'ReadableStream with byte source: desiredSize when closed');
test(() => {
new ReadableStream({
start(c) {
assert_equals(c.desiredSize, 10, 'desiredSize must start at the highWaterMark');
c.error();
assert_equals(c.desiredSize, null, 'after erroring, desiredSize must be null');
},
type: 'bytes'
}, {
highWaterMark: 10
});
}, 'ReadableStream with byte source: desiredSize when errored');
promise_test(t => {
const stream = new ReadableStream({
type: 'bytes'
});
const reader = stream.getReader();
reader.releaseLock();
return promise_rejects_js(t, TypeError, reader.closed, 'closed must reject');
}, 'ReadableStream with byte source: getReader(), then releaseLock()');
promise_test(t => {
const stream = new ReadableStream({
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
reader.releaseLock();
return promise_rejects_js(t, TypeError, reader.closed, 'closed must reject');
}, 'ReadableStream with byte source: getReader() with mode set to byob, then releaseLock()');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
c.close();
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader();
return reader.closed.then(() => {
assert_throws_js(TypeError, () => stream.getReader(), 'getReader() must throw');
});
}, 'ReadableStream with byte source: Test that closing a stream does not release a reader automatically');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
c.close();
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.closed.then(() => {
assert_throws_js(TypeError, () => stream.getReader({ mode: 'byob' }), 'getReader() must throw');
});
}, 'ReadableStream with byte source: Test that closing a stream does not release a BYOB reader automatically');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
c.error(error1);
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader();
return promise_rejects_exactly(t, error1, reader.closed, 'closed must reject').then(() => {
assert_throws_js(TypeError, () => stream.getReader(), 'getReader() must throw');
});
}, 'ReadableStream with byte source: Test that erroring a stream does not release a reader automatically');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
c.error(error1);
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return promise_rejects_exactly(t, error1, reader.closed, 'closed must reject').then(() => {
assert_throws_js(TypeError, () => stream.getReader({ mode: 'byob' }), 'getReader() must throw');
});
}, 'ReadableStream with byte source: Test that erroring a stream does not release a BYOB reader automatically');
promise_test(async t => {
const stream = new ReadableStream({
type: 'bytes'
});
const reader = stream.getReader();
const read = reader.read();
reader.releaseLock();
await promise_rejects_js(t, TypeError, read, 'pending read must reject');
}, 'ReadableStream with byte source: releaseLock() on ReadableStreamDefaultReader must reject pending read()');
promise_test(async t => {
const stream = new ReadableStream({
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const read = reader.read(new Uint8Array(1));
reader.releaseLock();
await promise_rejects_js(t, TypeError, read, 'pending read must reject');
}, 'ReadableStream with byte source: releaseLock() on ReadableStreamBYOBReader must reject pending read()');
promise_test(() => {
let pullCount = 0;
const stream = new ReadableStream({
pull() {
++pullCount;
},
type: 'bytes'
}, {
highWaterMark: 8
});
stream.getReader();
assert_equals(pullCount, 0, 'No pull as start() just finished and is not yet reflected to the state of the stream');
return Promise.resolve().then(() => {
assert_equals(pullCount, 1, 'pull must be invoked');
});
}, 'ReadableStream with byte source: Automatic pull() after start()');
promise_test(() => {
let pullCount = 0;
const stream = new ReadableStream({
pull() {
++pullCount;
},
type: 'bytes'
}, {
highWaterMark: 0
});
const reader = stream.getReader();
reader.read();
assert_equals(pullCount, 0, 'No pull as start() just finished and is not yet reflected to the state of the stream');
return Promise.resolve().then(() => {
assert_equals(pullCount, 1, 'pull must be invoked');
});
}, 'ReadableStream with byte source: Automatic pull() after start() and read()');
// View buffers are detached after pull() returns, so record the information at the time that pull() was called.
function extractViewInfo(view) {
return {
constructor: view.constructor,
bufferByteLength: view.buffer.byteLength,
byteOffset: view.byteOffset,
byteLength: view.byteLength
};
}
promise_test(() => {
let pullCount = 0;
let controller;
const byobRequests = [];
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
const byobRequest = controller.byobRequest;
const view = byobRequest.view;
byobRequests[pullCount] = {
nonNull: byobRequest !== null,
viewNonNull: view !== null,
viewInfo: extractViewInfo(view)
};
if (pullCount === 0) {
view[0] = 0x01;
byobRequest.respond(1);
} else if (pullCount === 1) {
view[0] = 0x02;
view[1] = 0x03;
byobRequest.respond(2);
}
++pullCount;
},
type: 'bytes',
autoAllocateChunkSize: 16
}, {
highWaterMark: 0
});
const reader = stream.getReader();
const p0 = reader.read();
const p1 = reader.read();
assert_equals(pullCount, 0, 'No pull() as start() just finished and is not yet reflected to the state of the stream');
return Promise.resolve().then(() => {
assert_equals(pullCount, 1, 'pull() must have been invoked once');
const byobRequest = byobRequests[0];
assert_true(byobRequest.nonNull, 'first byobRequest must not be null');
assert_true(byobRequest.viewNonNull, 'first byobRequest.view must not be null');
const viewInfo = byobRequest.viewInfo;
assert_equals(viewInfo.constructor, Uint8Array, 'first view.constructor should be Uint8Array');
assert_equals(viewInfo.bufferByteLength, 16, 'first view.buffer.byteLength should be 16');
assert_equals(viewInfo.byteOffset, 0, 'first view.byteOffset should be 0');
assert_equals(viewInfo.byteLength, 16, 'first view.byteLength should be 16');
return p0;
}).then(result => {
assert_equals(pullCount, 2, 'pull() must have been invoked twice');
const value = result.value;
assert_not_equals(value, undefined, 'first read should have a value');
assert_equals(value.constructor, Uint8Array, 'first value should be a Uint8Array');
assert_equals(value.buffer.byteLength, 16, 'first value.buffer.byteLength should be 16');
assert_equals(value.byteOffset, 0, 'first value.byteOffset should be 0');
assert_equals(value.byteLength, 1, 'first value.byteLength should be 1');
assert_equals(value[0], 0x01, 'first value[0] should be 0x01');
const byobRequest = byobRequests[1];
assert_true(byobRequest.nonNull, 'second byobRequest must not be null');
assert_true(byobRequest.viewNonNull, 'second byobRequest.view must not be null');
const viewInfo = byobRequest.viewInfo;
assert_equals(viewInfo.constructor, Uint8Array, 'second view.constructor should be Uint8Array');
assert_equals(viewInfo.bufferByteLength, 16, 'second view.buffer.byteLength should be 16');
assert_equals(viewInfo.byteOffset, 0, 'second view.byteOffset should be 0');
assert_equals(viewInfo.byteLength, 16, 'second view.byteLength should be 16');
return p1;
}).then(result => {
assert_equals(pullCount, 2, 'pull() should only be invoked twice');
const value = result.value;
assert_not_equals(value, undefined, 'second read should have a value');
assert_equals(value.constructor, Uint8Array, 'second value should be a Uint8Array');
assert_equals(value.buffer.byteLength, 16, 'second value.buffer.byteLength should be 16');
assert_equals(value.byteOffset, 0, 'second value.byteOffset should be 0');
assert_equals(value.byteLength, 2, 'second value.byteLength should be 2');
assert_equals(value[0], 0x02, 'second value[0] should be 0x02');
assert_equals(value[1], 0x03, 'second value[1] should be 0x03');
});
}, 'ReadableStream with byte source: autoAllocateChunkSize');
promise_test(() => {
let pullCount = 0;
let controller;
const byobRequests = [];
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
const byobRequest = controller.byobRequest;
const view = byobRequest.view;
byobRequests[pullCount] = {
nonNull: byobRequest !== null,
viewNonNull: view !== null,
viewInfo: extractViewInfo(view)
};
if (pullCount === 0) {
view[0] = 0x01;
byobRequest.respond(1);
} else if (pullCount === 1) {
view[0] = 0x02;
view[1] = 0x03;
byobRequest.respond(2);
}
++pullCount;
},
type: 'bytes',
autoAllocateChunkSize: 16
}, {
highWaterMark: 0
});
const reader = stream.getReader();
return reader.read().then(result => {
const value = result.value;
assert_not_equals(value, undefined, 'first read should have a value');
assert_equals(value.constructor, Uint8Array, 'first value should be a Uint8Array');
assert_equals(value.buffer.byteLength, 16, 'first value.buffer.byteLength should be 16');
assert_equals(value.byteOffset, 0, 'first value.byteOffset should be 0');
assert_equals(value.byteLength, 1, 'first value.byteLength should be 1');
assert_equals(value[0], 0x01, 'first value[0] should be 0x01');
const byobRequest = byobRequests[0];
assert_true(byobRequest.nonNull, 'first byobRequest must not be null');
assert_true(byobRequest.viewNonNull, 'first byobRequest.view must not be null');
const viewInfo = byobRequest.viewInfo;
assert_equals(viewInfo.constructor, Uint8Array, 'first view.constructor should be Uint8Array');
assert_equals(viewInfo.bufferByteLength, 16, 'first view.buffer.byteLength should be 16');
assert_equals(viewInfo.byteOffset, 0, 'first view.byteOffset should be 0');
assert_equals(viewInfo.byteLength, 16, 'first view.byteLength should be 16');
reader.releaseLock();
const byobReader = stream.getReader({ mode: 'byob' });
return byobReader.read(new Uint8Array(32));
}).then(result => {
const value = result.value;
assert_not_equals(value, undefined, 'second read should have a value');
assert_equals(value.constructor, Uint8Array, 'second value should be a Uint8Array');
assert_equals(value.buffer.byteLength, 32, 'second value.buffer.byteLength should be 32');
assert_equals(value.byteOffset, 0, 'second value.byteOffset should be 0');
assert_equals(value.byteLength, 2, 'second value.byteLength should be 2');
assert_equals(value[0], 0x02, 'second value[0] should be 0x02');
assert_equals(value[1], 0x03, 'second value[1] should be 0x03');
const byobRequest = byobRequests[1];
assert_true(byobRequest.nonNull, 'second byobRequest must not be null');
assert_true(byobRequest.viewNonNull, 'second byobRequest.view must not be null');
const viewInfo = byobRequest.viewInfo;
assert_equals(viewInfo.constructor, Uint8Array, 'second view.constructor should be Uint8Array');
assert_equals(viewInfo.bufferByteLength, 32, 'second view.buffer.byteLength should be 32');
assert_equals(viewInfo.byteOffset, 0, 'second view.byteOffset should be 0');
assert_equals(viewInfo.byteLength, 32, 'second view.byteLength should be 32');
assert_equals(pullCount, 2, 'pullCount should be 2');
});
}, 'ReadableStream with byte source: Mix of auto allocate and BYOB');
promise_test(() => {
let pullCount = 0;
const stream = new ReadableStream({
pull() {
++pullCount;
},
type: 'bytes'
}, {
highWaterMark: 0
});
const reader = stream.getReader();
reader.read(new Uint8Array(8));
assert_equals(pullCount, 0, 'No pull as start() just finished and is not yet reflected to the state of the stream');
return Promise.resolve().then(() => {
assert_equals(pullCount, 1, 'pull must be invoked');
});
}, 'ReadableStream with byte source: Automatic pull() after start() and read(view)');
promise_test(() => {
let pullCount = 0;
let controller;
let desiredSizeInStart;
let desiredSizeInPull;
const stream = new ReadableStream({
start(c) {
c.enqueue(new Uint8Array(16));
desiredSizeInStart = c.desiredSize;
controller = c;
},
pull() {
++pullCount;
if (pullCount === 1) {
desiredSizeInPull = controller.desiredSize;
}
},
type: 'bytes'
}, {
highWaterMark: 8
});
return Promise.resolve().then(() => {
assert_equals(pullCount, 0, 'No pull as the queue was filled by start()');
assert_equals(desiredSizeInStart, -8, 'desiredSize after enqueue() in start()');
const reader = stream.getReader();
const promise = reader.read();
assert_equals(pullCount, 1, 'The first pull() should be made on read()');
assert_equals(desiredSizeInPull, 8, 'desiredSize in pull()');
return promise.then(result => {
assert_false(result.done, 'result.done');
const view = result.value;
assert_equals(view.constructor, Uint8Array, 'view.constructor');
assert_equals(view.buffer.byteLength, 16, 'view.buffer');
assert_equals(view.byteOffset, 0, 'view.byteOffset');
assert_equals(view.byteLength, 16, 'view.byteLength');
});
});
}, 'ReadableStream with byte source: enqueue(), getReader(), then read()');
promise_test(() => {
let controller;
const stream = new ReadableStream({
start(c) {
controller = c;
},
type: 'bytes'
});
const reader = stream.getReader();
const promise = reader.read().then(result => {
assert_false(result.done);
const view = result.value;
assert_equals(view.constructor, Uint8Array);
assert_equals(view.buffer.byteLength, 1);
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 1);
});
controller.enqueue(new Uint8Array(1));
return promise;
}, 'ReadableStream with byte source: Push source that doesn\'t understand pull signal');
test(() => {
assert_throws_js(TypeError, () => new ReadableStream({
pull: 'foo',
type: 'bytes'
}), 'constructor should throw');
}, 'ReadableStream with byte source: pull() function is not callable');
promise_test(() => {
const stream = new ReadableStream({
start(c) {
c.enqueue(new Uint16Array(16));
},
type: 'bytes'
});
const reader = stream.getReader();
return reader.read().then(result => {
assert_false(result.done);
const view = result.value;
assert_equals(view.constructor, Uint8Array);
assert_equals(view.buffer.byteLength, 32);
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 32);
});
}, 'ReadableStream with byte source: enqueue() with Uint16Array, getReader(), then read()');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array(16);
view[0] = 0x01;
view[8] = 0x02;
c.enqueue(view);
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const byobReader = stream.getReader({ mode: 'byob' });
return byobReader.read(new Uint8Array(8)).then(result => {
assert_false(result.done, 'done');
const view = result.value;
assert_equals(view.constructor, Uint8Array, 'value.constructor');
assert_equals(view.buffer.byteLength, 8, 'value.buffer.byteLength');
assert_equals(view.byteOffset, 0, 'value.byteOffset');
assert_equals(view.byteLength, 8, 'value.byteLength');
assert_equals(view[0], 0x01);
byobReader.releaseLock();
const reader = stream.getReader();
return reader.read();
}).then(result => {
assert_false(result.done, 'done');
const view = result.value;
assert_equals(view.constructor, Uint8Array, 'value.constructor');
assert_equals(view.buffer.byteLength, 16, 'value.buffer.byteLength');
assert_equals(view.byteOffset, 8, 'value.byteOffset');
assert_equals(view.byteLength, 8, 'value.byteLength');
assert_equals(view[0], 0x02);
});
}, 'ReadableStream with byte source: enqueue(), read(view) partially, then read()');
promise_test(t => {
let controller;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader();
controller.enqueue(new Uint8Array(16));
controller.close();
return reader.read().then(result => {
assert_false(result.done, 'done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'byteOffset');
assert_equals(view.byteLength, 16, 'byteLength');
return reader.read();
}).then(result => {
assert_true(result.done, 'done');
assert_equals(result.value, undefined, 'value');
});
}, 'ReadableStream with byte source: getReader(), enqueue(), close(), then read()');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
c.enqueue(new Uint8Array(16));
c.close();
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader();
return reader.read().then(result => {
assert_false(result.done, 'done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'byteOffset');
assert_equals(view.byteLength, 16, 'byteLength');
return reader.read();
}).then(result => {
assert_true(result.done, 'done');
assert_equals(result.value, undefined, 'value');
});
}, 'ReadableStream with byte source: enqueue(), close(), getReader(), then read()');
promise_test(() => {
let controller;
let byobRequest;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
controller.enqueue(new Uint8Array(16));
byobRequest = controller.byobRequest;
},
type: 'bytes'
});
const reader = stream.getReader();
return reader.read().then(result => {
assert_false(result.done, 'done');
assert_equals(result.value.byteLength, 16, 'byteLength');
assert_equals(byobRequest, null, 'byobRequest must be null');
});
}, 'ReadableStream with byte source: Respond to pull() by enqueue()');
promise_test(() => {
let pullCount = 0;
let controller;
let byobRequest;
const desiredSizes = [];
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
byobRequest = controller.byobRequest;
desiredSizes.push(controller.desiredSize);
controller.enqueue(new Uint8Array(1));
desiredSizes.push(controller.desiredSize);
controller.enqueue(new Uint8Array(1));
desiredSizes.push(controller.desiredSize);
++pullCount;
},
type: 'bytes'
}, {
highWaterMark: 0
});
const reader = stream.getReader();
const p0 = reader.read();
const p1 = reader.read();
const p2 = reader.read();
// Respond to the first pull call.
controller.enqueue(new Uint8Array(1));
assert_equals(pullCount, 0, 'pullCount after the enqueue() outside pull');
return Promise.all([p0, p1, p2]).then(result => {
assert_equals(pullCount, 1, 'pullCount after completion of all read()s');
assert_equals(result[0].done, false, 'result[0].done');
assert_equals(result[0].value.byteLength, 1, 'result[0].value.byteLength');
assert_equals(result[1].done, false, 'result[1].done');
assert_equals(result[1].value.byteLength, 1, 'result[1].value.byteLength');
assert_equals(result[2].done, false, 'result[2].done');
assert_equals(result[2].value.byteLength, 1, 'result[2].value.byteLength');
assert_equals(byobRequest, null, 'byobRequest should be null');
assert_equals(desiredSizes[0], 0, 'desiredSize on pull should be 0');
assert_equals(desiredSizes[1], 0, 'desiredSize after 1st enqueue() should be 0');
assert_equals(desiredSizes[2], 0, 'desiredSize after 2nd enqueue() should be 0');
assert_equals(pullCount, 1, 'pull() should only be called once');
});
}, 'ReadableStream with byte source: Respond to pull() by enqueue() asynchronously');
promise_test(() => {
let pullCount = 0;
let byobRequest;
const desiredSizes = [];
const stream = new ReadableStream({
pull(c) {
byobRequest = c.byobRequest;
desiredSizes.push(c.desiredSize);
if (pullCount < 3) {
c.enqueue(new Uint8Array(1));
} else {
c.close();
}
++pullCount;
},
type: 'bytes'
}, {
highWaterMark: 256
});
const reader = stream.getReader();
const p0 = reader.read();
const p1 = reader.read();
const p2 = reader.read();
assert_equals(pullCount, 0, 'No pull as start() just finished and is not yet reflected to the state of the stream');
return Promise.all([p0, p1, p2]).then(result => {
assert_equals(pullCount, 4, 'pullCount after completion of all read()s');
assert_equals(result[0].done, false, 'result[0].done');
assert_equals(result[0].value.byteLength, 1, 'result[0].value.byteLength');
assert_equals(result[1].done, false, 'result[1].done');
assert_equals(result[1].value.byteLength, 1, 'result[1].value.byteLength');
assert_equals(result[2].done, false, 'result[2].done');
assert_equals(result[2].value.byteLength, 1, 'result[2].value.byteLength');
assert_equals(byobRequest, null, 'byobRequest should be null');
assert_equals(desiredSizes[0], 256, 'desiredSize on pull should be 256');
assert_equals(desiredSizes[1], 256, 'desiredSize after 1st enqueue() should be 256');
assert_equals(desiredSizes[2], 256, 'desiredSize after 2nd enqueue() should be 256');
assert_equals(desiredSizes[3], 256, 'desiredSize after 3rd enqueue() should be 256');
});
}, 'ReadableStream with byte source: Respond to multiple pull() by separate enqueue()');
promise_test(() => {
let controller;
let pullCount = 0;
const byobRequestDefined = [];
let byobRequestViewDefined;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
byobRequestDefined.push(controller.byobRequest !== null);
const initialByobRequest = controller.byobRequest;
const view = controller.byobRequest.view;
view[0] = 0x01;
controller.byobRequest.respond(1);
byobRequestDefined.push(controller.byobRequest !== null);
byobRequestViewDefined = initialByobRequest.view !== null;
++pullCount;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint8Array(1)).then(result => {
assert_false(result.done, 'result.done');
assert_equals(result.value.byteLength, 1, 'result.value.byteLength');
assert_equals(result.value[0], 0x01, 'result.value[0]');
assert_equals(pullCount, 1, 'pull() should be called only once');
assert_true(byobRequestDefined[0], 'byobRequest must not be null before respond()');
assert_false(byobRequestDefined[1], 'byobRequest must be null after respond()');
assert_false(byobRequestViewDefined, 'view of initial byobRequest must be null after respond()');
});
}, 'ReadableStream with byte source: read(view), then respond()');
promise_test(() => {
let controller;
let pullCount = 0;
const byobRequestDefined = [];
let byobRequestViewDefined;
const stream = new ReadableStream({
start(c) {
controller = c;
},
async pull() {
byobRequestDefined.push(controller.byobRequest !== null);
const initialByobRequest = controller.byobRequest;
const transferredView = await transferArrayBufferView(controller.byobRequest.view);
transferredView[0] = 0x01;
controller.byobRequest.respondWithNewView(transferredView);
byobRequestDefined.push(controller.byobRequest !== null);
byobRequestViewDefined = initialByobRequest.view !== null;
++pullCount;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint8Array(1)).then(result => {
assert_false(result.done, 'result.done');
assert_equals(result.value.byteLength, 1, 'result.value.byteLength');
assert_equals(result.value[0], 0x01, 'result.value[0]');
assert_equals(pullCount, 1, 'pull() should be called only once');
assert_true(byobRequestDefined[0], 'byobRequest must not be null before respondWithNewView()');
assert_false(byobRequestDefined[1], 'byobRequest must be null after respondWithNewView()');
assert_false(byobRequestViewDefined, 'view of initial byobRequest must be null after respondWithNewView()');
});
}, 'ReadableStream with byte source: read(view), then respondWithNewView() with a transferred ArrayBuffer');
promise_test(() => {
let controller;
let byobRequestWasDefined;
let incorrectRespondException;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
byobRequestWasDefined = controller.byobRequest !== null;
try {
controller.byobRequest.respond(2);
} catch (e) {
incorrectRespondException = e;
}
controller.byobRequest.respond(1);
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint8Array(1)).then(() => {
assert_true(byobRequestWasDefined, 'byobRequest should be non-null');
assert_not_equals(incorrectRespondException, undefined, 'respond() must throw');
assert_equals(incorrectRespondException.name, 'RangeError', 'respond() must throw a RangeError');
});
}, 'ReadableStream with byte source: read(view), then respond() with too big value');
promise_test(() => {
let pullCount = 0;
let controller;
let byobRequest;
let viewInfo;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
++pullCount;
byobRequest = controller.byobRequest;
const view = byobRequest.view;
viewInfo = extractViewInfo(view);
view[0] = 0x01;
view[1] = 0x02;
view[2] = 0x03;
controller.byobRequest.respond(3);
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint16Array(2)).then(result => {
assert_equals(pullCount, 1);
assert_false(result.done, 'done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'byteOffset');
assert_equals(view.byteLength, 2, 'byteLength');
const dataView = new DataView(view.buffer, view.byteOffset, view.byteLength);
assert_equals(dataView.getUint16(0), 0x0102);
return reader.read(new Uint8Array(1));
}).then(result => {
assert_equals(pullCount, 1);
assert_not_equals(byobRequest, null, 'byobRequest must not be null');
assert_equals(viewInfo.constructor, Uint8Array, 'view.constructor should be Uint8Array');
assert_equals(viewInfo.bufferByteLength, 4, 'view.buffer.byteLength should be 4');
assert_equals(viewInfo.byteOffset, 0, 'view.byteOffset should be 0');
assert_equals(viewInfo.byteLength, 4, 'view.byteLength should be 4');
assert_false(result.done, 'done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'byteOffset');
assert_equals(view.byteLength, 1, 'byteLength');
assert_equals(view[0], 0x03);
});
}, 'ReadableStream with byte source: respond(3) to read(view) with 2 element Uint16Array enqueues the 1 byte ' +
'remainder');
promise_test(t => {
const stream = new ReadableStream({
start(controller) {
const view = new Uint8Array(16);
view[15] = 0x01;
controller.enqueue(view);
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint8Array(16)).then(result => {
assert_false(result.done);
const view = result.value;
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 16);
assert_equals(view[15], 0x01);
});
}, 'ReadableStream with byte source: enqueue(), getReader(), then read(view)');
promise_test(t => {
let cancelCount = 0;
let reason;
const passedReason = new TypeError('foo');
const stream = new ReadableStream({
start(c) {
c.enqueue(new Uint8Array(16));
},
pull: t.unreached_func('pull() should not be called'),
cancel(r) {
if (cancelCount === 0) {
reason = r;
}
++cancelCount;
},
type: 'bytes'
});
const reader = stream.getReader();
return reader.cancel(passedReason).then(result => {
assert_equals(result, undefined);
assert_equals(cancelCount, 1);
assert_equals(reason, passedReason, 'reason should equal the passed reason');
});
}, 'ReadableStream with byte source: enqueue(), getReader(), then cancel() (mode = not BYOB)');
promise_test(t => {
let cancelCount = 0;
let reason;
const passedReason = new TypeError('foo');
const stream = new ReadableStream({
start(c) {
c.enqueue(new Uint8Array(16));
},
pull: t.unreached_func('pull() should not be called'),
cancel(r) {
if (cancelCount === 0) {
reason = r;
}
++cancelCount;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.cancel(passedReason).then(result => {
assert_equals(result, undefined);
assert_equals(cancelCount, 1);
assert_equals(reason, passedReason, 'reason should equal the passed reason');
});
}, 'ReadableStream with byte source: enqueue(), getReader(), then cancel() (mode = BYOB)');
promise_test(t => {
let cancelCount = 0;
let reason;
const passedReason = new TypeError('foo');
let controller;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull: t.unreached_func('pull() should not be called'),
cancel(r) {
if (cancelCount === 0) {
reason = r;
}
++cancelCount;
return 'bar';
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const readPromise = reader.read(new Uint8Array(1)).then(result => {
assert_true(result.done, 'result.done');
assert_equals(result.value, undefined, 'result.value');
});
const cancelPromise = reader.cancel(passedReason).then(result => {
assert_equals(result, undefined, 'cancel() return value should be fulfilled with undefined');
assert_equals(cancelCount, 1, 'cancel() should be called only once');
assert_equals(reason, passedReason, 'reason should equal the passed reason');
});
return Promise.all([readPromise, cancelPromise]);
}, 'ReadableStream with byte source: getReader(), read(view), then cancel()');
promise_test(() => {
let pullCount = 0;
let controller;
let byobRequest;
const viewInfos = [];
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
byobRequest = controller.byobRequest;
viewInfos.push(extractViewInfo(controller.byobRequest.view));
controller.enqueue(new Uint8Array(1));
viewInfos.push(extractViewInfo(controller.byobRequest.view));
++pullCount;
},
type: 'bytes'
});
return Promise.resolve().then(() => {
assert_equals(pullCount, 0, 'No pull() as no read(view) yet');
const reader = stream.getReader({ mode: 'byob' });
const promise = reader.read(new Uint16Array(1)).then(result => {
assert_true(result.done, 'result.done');
assert_equals(result.value, undefined, 'result.value');
});
assert_equals(pullCount, 1, '1 pull() should have been made in response to partial fill by enqueue()');
assert_not_equals(byobRequest, null, 'byobRequest should not be null');
assert_equals(viewInfos[0].byteLength, 2, 'byteLength before enqueue() should be 2');
assert_equals(viewInfos[1].byteLength, 1, 'byteLength after enqueue() should be 1');
reader.cancel();
assert_equals(pullCount, 1, 'pull() should only be called once');
return promise;
});
}, 'ReadableStream with byte source: cancel() with partially filled pending pull() request');
promise_test(() => {
let controller;
let pullCalled = false;
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array(8);
view[7] = 0x01;
c.enqueue(view);
controller = c;
},
pull() {
pullCalled = true;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const buffer = new ArrayBuffer(16);
return reader.read(new Uint8Array(buffer, 8, 8)).then(result => {
assert_false(result.done);
assert_false(pullCalled, 'pull() must not have been called');
const view = result.value;
assert_equals(view.constructor, Uint8Array);
assert_equals(view.buffer.byteLength, 16);
assert_equals(view.byteOffset, 8);
assert_equals(view.byteLength, 8);
assert_equals(view[7], 0x01);
});
}, 'ReadableStream with byte source: enqueue(), getReader(), then read(view) where view.buffer is not fully ' +
'covered by view');
promise_test(() => {
let controller;
let pullCalled = false;
const stream = new ReadableStream({
start(c) {
let view;
view = new Uint8Array(16);
view[15] = 123;
c.enqueue(view);
view = new Uint8Array(8);
view[7] = 111;
c.enqueue(view);
controller = c;
},
pull() {
pullCalled = true;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint8Array(24)).then(result => {
assert_false(result.done, 'done');
assert_false(pullCalled, 'pull() must not have been called');
const view = result.value;
assert_equals(view.byteOffset, 0, 'byteOffset');
assert_equals(view.byteLength, 24, 'byteLength');
assert_equals(view[15], 123, 'Contents are set from the first chunk');
assert_equals(view[23], 111, 'Contents are set from the second chunk');
});
}, 'ReadableStream with byte source: Multiple enqueue(), getReader(), then read(view)');
promise_test(() => {
let pullCalled = false;
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array(16);
view[15] = 0x01;
c.enqueue(view);
},
pull() {
pullCalled = true;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint8Array(24)).then(result => {
assert_false(result.done);
assert_false(pullCalled, 'pull() must not have been called');
const view = result.value;
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 16);
assert_equals(view[15], 0x01);
});
}, 'ReadableStream with byte source: enqueue(), getReader(), then read(view) with a bigger view');
promise_test(() => {
let pullCalled = false;
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array(16);
view[7] = 0x01;
view[15] = 0x02;
c.enqueue(view);
},
pull() {
pullCalled = true;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint8Array(8)).then(result => {
assert_false(result.done, 'done');
const view = result.value;
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 8);
assert_equals(view[7], 0x01);
return reader.read(new Uint8Array(8));
}).then(result => {
assert_false(result.done, 'done');
assert_false(pullCalled, 'pull() must not have been called');
const view = result.value;
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 8);
assert_equals(view[7], 0x02);
});
}, 'ReadableStream with byte source: enqueue(), getReader(), then read(view) with smaller views');
promise_test(() => {
let controller;
let viewInfo;
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array(1);
view[0] = 0xff;
c.enqueue(view);
controller = c;
},
pull() {
if (controller.byobRequest === null) {
return;
}
const view = controller.byobRequest.view;
viewInfo = extractViewInfo(view);
view[0] = 0xaa;
controller.byobRequest.respond(1);
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint16Array(1)).then(result => {
assert_false(result.done);
const view = result.value;
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 2);
const dataView = new DataView(view.buffer, view.byteOffset, view.byteLength);
assert_equals(dataView.getUint16(0), 0xffaa);
assert_equals(viewInfo.constructor, Uint8Array, 'view.constructor should be Uint8Array');
assert_equals(viewInfo.bufferByteLength, 2, 'view.buffer.byteLength should be 2');
assert_equals(viewInfo.byteOffset, 1, 'view.byteOffset should be 1');
assert_equals(viewInfo.byteLength, 1, 'view.byteLength should be 1');
});
}, 'ReadableStream with byte source: enqueue() 1 byte, getReader(), then read(view) with Uint16Array');
promise_test(() => {
let pullCount = 0;
let controller;
let byobRequest;
let viewInfo;
let desiredSize;
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array(3);
view[0] = 0x01;
view[2] = 0x02;
c.enqueue(view);
controller = c;
},
pull() {
byobRequest = controller.byobRequest;
const view = controller.byobRequest.view;
viewInfo = extractViewInfo(view);
view[0] = 0x03;
controller.byobRequest.respond(1);
desiredSize = controller.desiredSize;
++pullCount;
},
type: 'bytes'
});
// Wait for completion of the start method to be reflected.
return Promise.resolve().then(() => {
const reader = stream.getReader({ mode: 'byob' });
const promise = reader.read(new Uint16Array(2)).then(result => {
assert_false(result.done, 'done');
const view = result.value;
assert_equals(view.constructor, Uint16Array, 'constructor');
assert_equals(view.buffer.byteLength, 4, 'buffer.byteLength');
assert_equals(view.byteOffset, 0, 'byteOffset');
assert_equals(view.byteLength, 2, 'byteLength');
const dataView = new DataView(view.buffer, view.byteOffset, view.byteLength);
assert_equals(dataView.getUint16(0), 0x0100, 'contents are set');
const p = reader.read(new Uint16Array(1));
assert_equals(pullCount, 1);
return p;
}).then(result => {
assert_false(result.done, 'done');
const view = result.value;
assert_equals(view.buffer.byteLength, 2, 'buffer.byteLength');
assert_equals(view.byteOffset, 0, 'byteOffset');
assert_equals(view.byteLength, 2, 'byteLength');
const dataView = new DataView(view.buffer, view.byteOffset, view.byteLength);
assert_equals(dataView.getUint16(0), 0x0203, 'contents are set');
assert_not_equals(byobRequest, null, 'byobRequest must not be null');
assert_equals(viewInfo.constructor, Uint8Array, 'view.constructor should be Uint8Array');
assert_equals(viewInfo.bufferByteLength, 2, 'view.buffer.byteLength should be 2');
assert_equals(viewInfo.byteOffset, 1, 'view.byteOffset should be 1');
assert_equals(viewInfo.byteLength, 1, 'view.byteLength should be 1');
assert_equals(desiredSize, 0, 'desiredSize should be zero');
});
assert_equals(pullCount, 0);
return promise;
});
}, 'ReadableStream with byte source: enqueue() 3 byte, getReader(), then read(view) with 2-element Uint16Array');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array(1);
view[0] = 0xff;
c.enqueue(view);
c.close();
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return promise_rejects_js(t, TypeError, reader.read(new Uint16Array(1)), 'read(view) must fail')
.then(() => promise_rejects_js(t, TypeError, reader.closed, 'reader.closed should reject'));
}, 'ReadableStream with byte source: read(view) with Uint16Array on close()-d stream with 1 byte enqueue()-d must ' +
'fail');
promise_test(t => {
let controller;
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array(1);
view[0] = 0xff;
c.enqueue(view);
controller = c;
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const readPromise = reader.read(new Uint16Array(1));
assert_throws_js(TypeError, () => controller.close(), 'controller.close() must throw');
return promise_rejects_js(t, TypeError, readPromise, 'read(view) must fail')
.then(() => promise_rejects_js(t, TypeError, reader.closed, 'reader.closed must reject'));
}, 'ReadableStream with byte source: A stream must be errored if close()-d before fulfilling read(view) with ' +
'Uint16Array');
test(() => {
let controller;
new ReadableStream({
start(c) {
controller = c;
},
type: 'bytes'
});
// Enqueue a chunk so that the stream doesn't get closed. This is to check duplicate close() calls are rejected
// even if the stream has not yet entered the closed state.
const view = new Uint8Array(1);
controller.enqueue(view);
controller.close();
assert_throws_js(TypeError, () => controller.close(), 'controller.close() must throw');
}, 'ReadableStream with byte source: Throw if close()-ed more than once');
test(() => {
let controller;
new ReadableStream({
start(c) {
controller = c;
},
type: 'bytes'
});
// Enqueue a chunk so that the stream doesn't get closed. This is to check enqueue() after close() is rejected
// even if the stream has not yet entered the closed state.
const view = new Uint8Array(1);
controller.enqueue(view);
controller.close();
assert_throws_js(TypeError, () => controller.enqueue(view), 'controller.close() must throw');
}, 'ReadableStream with byte source: Throw on enqueue() after close()');
promise_test(() => {
let controller;
let byobRequest;
let viewInfo;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
byobRequest = controller.byobRequest;
const view = controller.byobRequest.view;
viewInfo = extractViewInfo(view);
view[15] = 0x01;
controller.byobRequest.respond(16);
controller.close();
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint8Array(16)).then(result => {
assert_false(result.done);
const view = result.value;
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 16);
assert_equals(view[15], 0x01);
return reader.read(new Uint8Array(16));
}).then(result => {
assert_true(result.done);
const view = result.value;
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 0);
assert_not_equals(byobRequest, null, 'byobRequest must not be null');
assert_equals(viewInfo.constructor, Uint8Array, 'view.constructor should be Uint8Array');
assert_equals(viewInfo.bufferByteLength, 16, 'view.buffer.byteLength should be 16');
assert_equals(viewInfo.byteOffset, 0, 'view.byteOffset should be 0');
assert_equals(viewInfo.byteLength, 16, 'view.byteLength should be 16');
});
}, 'ReadableStream with byte source: read(view), then respond() and close() in pull()');
promise_test(() => {
let pullCount = 0;
let controller;
const viewInfos = [];
const viewInfosAfterRespond = [];
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
if (controller.byobRequest === null) {
return;
}
for (let i = 0; i < 4; ++i) {
const view = controller.byobRequest.view;
viewInfos.push(extractViewInfo(view));
view[0] = 0x01;
controller.byobRequest.respond(1);
viewInfosAfterRespond.push(extractViewInfo(view));
}
++pullCount;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint32Array(1)).then(result => {
assert_false(result.done, 'result.done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'result.value.byteOffset');
assert_equals(view.byteLength, 4, 'result.value.byteLength');
assert_equals(view[0], 0x01010101, 'result.value[0]');
assert_equals(pullCount, 1, 'pull() should only be called once');
for (let i = 0; i < 4; ++i) {
assert_equals(viewInfos[i].constructor, Uint8Array, 'view.constructor should be Uint8Array');
assert_equals(viewInfos[i].bufferByteLength, 4, 'view.buffer.byteLength should be 4');
assert_equals(viewInfos[i].byteOffset, i, 'view.byteOffset should be i');
assert_equals(viewInfos[i].byteLength, 4 - i, 'view.byteLength should be 4 - i');
assert_equals(viewInfosAfterRespond[i].bufferByteLength, 0, 'view.buffer should be transferred after respond()');
}
});
}, 'ReadableStream with byte source: read(view) with Uint32Array, then fill it by multiple respond() calls');
promise_test(() => {
let pullCount = 0;
let controller;
const viewInfos = [];
const viewInfosAfterEnqueue = [];
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
if (controller.byobRequest === null) {
return;
}
for (let i = 0; i < 4; ++i) {
const view = controller.byobRequest.view;
viewInfos.push(extractViewInfo(view));
controller.enqueue(new Uint8Array([0x01]));
viewInfosAfterEnqueue.push(extractViewInfo(view));
}
++pullCount;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return reader.read(new Uint32Array(1)).then(result => {
assert_false(result.done, 'result.done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'result.value.byteOffset');
assert_equals(view.byteLength, 4, 'result.value.byteLength');
assert_equals(view[0], 0x01010101, 'result.value[0]');
assert_equals(pullCount, 1, 'pull() should only be called once');
for (let i = 0; i < 4; ++i) {
assert_equals(viewInfos[i].constructor, Uint8Array, 'view.constructor should be Uint8Array');
assert_equals(viewInfos[i].bufferByteLength, 4, 'view.buffer.byteLength should be 4');
assert_equals(viewInfos[i].byteOffset, i, 'view.byteOffset should be i');
assert_equals(viewInfos[i].byteLength, 4 - i, 'view.byteLength should be 4 - i');
assert_equals(viewInfosAfterEnqueue[i].bufferByteLength, 0, 'view.buffer should be transferred after enqueue()');
}
});
}, 'ReadableStream with byte source: read(view) with Uint32Array, then fill it by multiple enqueue() calls');
promise_test(() => {
let pullCount = 0;
let controller;
let byobRequest;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
byobRequest = controller.byobRequest;
++pullCount;
},
type: 'bytes'
});
const reader = stream.getReader();
const p0 = reader.read().then(result => {
assert_equals(pullCount, 1);
controller.enqueue(new Uint8Array(2));
// Since the queue has data no less than HWM, no more pull.
assert_equals(pullCount, 1);
assert_false(result.done);
const view = result.value;
assert_equals(view.constructor, Uint8Array);
assert_equals(view.buffer.byteLength, 1);
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 1);
});
assert_equals(pullCount, 0, 'No pull should have been made since the startPromise has not yet been handled');
const p1 = reader.read().then(result => {
assert_equals(pullCount, 1);
assert_false(result.done);
const view = result.value;
assert_equals(view.constructor, Uint8Array);
assert_equals(view.buffer.byteLength, 2);
assert_equals(view.byteOffset, 0);
assert_equals(view.byteLength, 2);
assert_equals(byobRequest, null, 'byobRequest must be null');
});
assert_equals(pullCount, 0, 'No pull should have been made since the startPromise has not yet been handled');
controller.enqueue(new Uint8Array(1));
assert_equals(pullCount, 0, 'No pull should have been made since the startPromise has not yet been handled');
return Promise.all([p0, p1]);
}, 'ReadableStream with byte source: read() twice, then enqueue() twice');
promise_test(t => {
let controller;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const p0 = reader.read(new Uint8Array(16)).then(result => {
assert_true(result.done, '1st read: done');
const view = result.value;
assert_equals(view.buffer.byteLength, 16, '1st read: buffer.byteLength');
assert_equals(view.byteOffset, 0, '1st read: byteOffset');
assert_equals(view.byteLength, 0, '1st read: byteLength');
});
const p1 = reader.read(new Uint8Array(32)).then(result => {
assert_true(result.done, '2nd read: done');
const view = result.value;
assert_equals(view.buffer.byteLength, 32, '2nd read: buffer.byteLength');
assert_equals(view.byteOffset, 0, '2nd read: byteOffset');
assert_equals(view.byteLength, 0, '2nd read: byteLength');
});
controller.close();
controller.byobRequest.respond(0);
return Promise.all([p0, p1]);
}, 'ReadableStream with byte source: Multiple read(view), close() and respond()');
promise_test(t => {
let controller;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const p0 = reader.read(new Uint8Array(16)).then(result => {
assert_false(result.done, '1st read: done');
const view = result.value;
assert_equals(view.buffer.byteLength, 16, '1st read: buffer.byteLength');
assert_equals(view.byteOffset, 0, '1st read: byteOffset');
assert_equals(view.byteLength, 16, '1st read: byteLength');
});
const p1 = reader.read(new Uint8Array(16)).then(result => {
assert_false(result.done, '2nd read: done');
const view = result.value;
assert_equals(view.buffer.byteLength, 16, '2nd read: buffer.byteLength');
assert_equals(view.byteOffset, 0, '2nd read: byteOffset');
assert_equals(view.byteLength, 8, '2nd read: byteLength');
});
controller.enqueue(new Uint8Array(24));
return Promise.all([p0, p1]);
}, 'ReadableStream with byte source: Multiple read(view), big enqueue()');
promise_test(t => {
let controller;
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
let bytesRead = 0;
function pump() {
return reader.read(new Uint8Array(7)).then(result => {
if (result.done) {
assert_equals(bytesRead, 1024);
return undefined;
}
bytesRead += result.value.byteLength;
return pump();
});
}
const promise = pump();
controller.enqueue(new Uint8Array(512));
controller.enqueue(new Uint8Array(512));
controller.close();
return promise;
}, 'ReadableStream with byte source: Multiple read(view) and multiple enqueue()');
promise_test(t => {
let pullCalled = false;
const stream = new ReadableStream({
pull(controller) {
pullCalled = true;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return promise_rejects_js(t, TypeError, reader.read(), 'read() must fail')
.then(() => assert_false(pullCalled, 'pull() must not have been called'));
}, 'ReadableStream with byte source: read(view) with passing undefined as view must fail');
promise_test(t => {
const stream = new ReadableStream({
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return promise_rejects_js(t, TypeError, reader.read({}), 'read(view) must fail');
}, 'ReadableStream with byte source: read(view) with passing an empty object as view must fail');
promise_test(t => {
const stream = new ReadableStream({
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return promise_rejects_js(t, TypeError,
reader.read({ buffer: new ArrayBuffer(10), byteOffset: 0, byteLength: 10 }),
'read(view) must fail');
}, 'ReadableStream with byte source: Even read(view) with passing ArrayBufferView like object as view must fail');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
c.error(error1);
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader();
return promise_rejects_exactly(t, error1, reader.read(), 'read() must fail');
}, 'ReadableStream with byte source: read() on an errored stream');
promise_test(t => {
let controller;
const stream = new ReadableStream({
start(c) {
controller = c;
},
type: 'bytes'
});
const reader = stream.getReader();
const promise = promise_rejects_exactly(t, error1, reader.read(), 'read() must fail');
controller.error(error1);
return promise;
}, 'ReadableStream with byte source: read(), then error()');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
c.error(error1);
},
pull: t.unreached_func('pull() should not be called'),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return promise_rejects_exactly(t, error1, reader.read(new Uint8Array(1)), 'read() must fail');
}, 'ReadableStream with byte source: read(view) on an errored stream');
promise_test(t => {
let controller;
const stream = new ReadableStream({
start(c) {
controller = c;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const promise = promise_rejects_exactly(t, error1, reader.read(new Uint8Array(1)), 'read() must fail');
controller.error(error1);
return promise;
}, 'ReadableStream with byte source: read(view), then error()');
promise_test(t => {
let controller;
let byobRequest;
const testError = new TypeError('foo');
const stream = new ReadableStream({
start(c) {
controller = c;
},
pull() {
byobRequest = controller.byobRequest;
throw testError;
},
type: 'bytes'
});
const reader = stream.getReader();
const promise = promise_rejects_exactly(t, testError, reader.read(), 'read() must fail');
return promise_rejects_exactly(t, testError, promise.then(() => reader.closed))
.then(() => assert_equals(byobRequest, null, 'byobRequest must be null'));
}, 'ReadableStream with byte source: Throwing in pull function must error the stream');
promise_test(t => {
let byobRequest;
const stream = new ReadableStream({
pull(controller) {
byobRequest = controller.byobRequest;
controller.error(error1);
throw new TypeError('foo');
},
type: 'bytes'
});
const reader = stream.getReader();
return promise_rejects_exactly(t, error1, reader.read(), 'read() must fail')
.then(() => promise_rejects_exactly(t, error1, reader.closed, 'closed must fail'))
.then(() => assert_equals(byobRequest, null, 'byobRequest must be null'));
}, 'ReadableStream with byte source: Throwing in pull in response to read() must be ignored if the stream is ' +
'errored in it');
promise_test(t => {
let byobRequest;
const testError = new TypeError('foo');
const stream = new ReadableStream({
pull(controller) {
byobRequest = controller.byobRequest;
throw testError;
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return promise_rejects_exactly(t, testError, reader.read(new Uint8Array(1)), 'read(view) must fail')
.then(() => promise_rejects_exactly(t, testError, reader.closed, 'reader.closed must reject'))
.then(() => assert_not_equals(byobRequest, null, 'byobRequest must not be null'));
}, 'ReadableStream with byte source: Throwing in pull in response to read(view) function must error the stream');
promise_test(t => {
let byobRequest;
const stream = new ReadableStream({
pull(controller) {
byobRequest = controller.byobRequest;
controller.error(error1);
throw new TypeError('foo');
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
return promise_rejects_exactly(t, error1, reader.read(new Uint8Array(1)), 'read(view) must fail')
.then(() => promise_rejects_exactly(t, error1, reader.closed, 'closed must fail'))
.then(() => assert_not_equals(byobRequest, null, 'byobRequest must not be null'));
}, 'ReadableStream with byte source: Throwing in pull in response to read(view) must be ignored if the stream is ' +
'errored in it');
promise_test(() => {
let byobRequest;
const rs = new ReadableStream({
pull(controller) {
byobRequest = controller.byobRequest;
byobRequest.respond(4);
},
type: 'bytes'
});
const reader = rs.getReader({ mode: 'byob' });
const view = new Uint8Array(16);
return reader.read(view).then(() => {
assert_throws_js(TypeError, () => byobRequest.respond(4), 'respond() should throw a TypeError');
});
}, 'calling respond() twice on the same byobRequest should throw');
promise_test(() => {
let byobRequest;
const newView = () => new Uint8Array(16);
const rs = new ReadableStream({
pull(controller) {
byobRequest = controller.byobRequest;
byobRequest.respondWithNewView(newView());
},
type: 'bytes'
});
const reader = rs.getReader({ mode: 'byob' });
return reader.read(newView()).then(() => {
assert_throws_js(TypeError, () => byobRequest.respondWithNewView(newView()),
'respondWithNewView() should throw a TypeError');
});
}, 'calling respondWithNewView() twice on the same byobRequest should throw');
promise_test(() => {
let controller;
let byobRequest;
let resolvePullCalledPromise;
const pullCalledPromise = new Promise(resolve => {
resolvePullCalledPromise = resolve;
});
let resolvePull;
const rs = new ReadableStream({
start(c) {
controller = c;
},
pull(c) {
byobRequest = c.byobRequest;
resolvePullCalledPromise();
return new Promise(resolve => {
resolvePull = resolve;
});
},
type: 'bytes'
});
const reader = rs.getReader({ mode: 'byob' });
const readPromise = reader.read(new Uint8Array(16));
return pullCalledPromise.then(() => {
controller.close();
byobRequest.respond(0);
resolvePull();
return readPromise.then(() => {
assert_throws_js(TypeError, () => byobRequest.respond(0), 'respond() should throw');
});
});
}, 'calling respond(0) twice on the same byobRequest should throw even when closed');
promise_test(() => {
let controller;
let byobRequest;
let resolvePullCalledPromise;
const pullCalledPromise = new Promise(resolve => {
resolvePullCalledPromise = resolve;
});
let resolvePull;
const rs = new ReadableStream({
start(c) {
controller = c;
},
pull(c) {
byobRequest = c.byobRequest;
resolvePullCalledPromise();
return new Promise(resolve => {
resolvePull = resolve;
});
},
type: 'bytes'
});
const reader = rs.getReader({ mode: 'byob' });
const readPromise = reader.read(new Uint8Array(16));
return pullCalledPromise.then(() => {
const cancelPromise = reader.cancel('meh');
assert_throws_js(TypeError, () => byobRequest.respond(0), 'respond() should throw');
resolvePull();
return Promise.all([readPromise, cancelPromise]);
});
}, 'calling respond() should throw when canceled');
promise_test(async t => {
let resolvePullCalledPromise;
const pullCalledPromise = new Promise(resolve => {
resolvePullCalledPromise = resolve;
});
let resolvePull;
const rs = new ReadableStream({
pull() {
resolvePullCalledPromise();
return new Promise(resolve => {
resolvePull = resolve;
});
},
type: 'bytes'
});
const reader = rs.getReader({ mode: 'byob' });
const read = reader.read(new Uint8Array(16));
await pullCalledPromise;
resolvePull();
await delay(0);
reader.releaseLock();
await promise_rejects_js(t, TypeError, read, 'pending read should reject');
}, 'pull() resolving should not resolve read()');
promise_test(() => {
// Tests https://github.com/whatwg/streams/issues/686
let controller;
const rs = new ReadableStream({
autoAllocateChunkSize: 128,
start(c) {
controller = c;
},
type: 'bytes'
});
const readPromise = rs.getReader().read();
const br = controller.byobRequest;
controller.close();
br.respond(0);
return readPromise;
}, 'ReadableStream with byte source: default reader + autoAllocateChunkSize + byobRequest interaction');
test(() => {
assert_throws_js(TypeError, () => new ReadableStream({ autoAllocateChunkSize: 0, type: 'bytes' }),
'controller cannot be setup with autoAllocateChunkSize = 0');
}, 'ReadableStream with byte source: autoAllocateChunkSize cannot be 0');
test(() => {
const ReadableStreamBYOBReader = new ReadableStream({ type: 'bytes' }).getReader({ mode: 'byob' }).constructor;
const stream = new ReadableStream({ type: 'bytes' });
new ReadableStreamBYOBReader(stream);
}, 'ReadableStreamBYOBReader can be constructed directly');
test(() => {
const ReadableStreamBYOBReader = new ReadableStream({ type: 'bytes' }).getReader({ mode: 'byob' }).constructor;
assert_throws_js(TypeError, () => new ReadableStreamBYOBReader({}), 'constructor must throw');
}, 'ReadableStreamBYOBReader constructor requires a ReadableStream argument');
test(() => {
const ReadableStreamBYOBReader = new ReadableStream({ type: 'bytes' }).getReader({ mode: 'byob' }).constructor;
const stream = new ReadableStream({ type: 'bytes' });
stream.getReader();
assert_throws_js(TypeError, () => new ReadableStreamBYOBReader(stream), 'constructor must throw');
}, 'ReadableStreamBYOBReader constructor requires an unlocked ReadableStream');
test(() => {
const ReadableStreamBYOBReader = new ReadableStream({ type: 'bytes' }).getReader({ mode: 'byob' }).constructor;
const stream = new ReadableStream();
assert_throws_js(TypeError, () => new ReadableStreamBYOBReader(stream), 'constructor must throw');
}, 'ReadableStreamBYOBReader constructor requires a ReadableStream with type "bytes"');
test(() => {
assert_throws_js(RangeError, () => new ReadableStream({ type: 'bytes' }, {
size() {
return 1;
}
}), 'constructor should throw for size function');
assert_throws_js(RangeError,
() => new ReadableStream({ type: 'bytes' }, new CountQueuingStrategy({ highWaterMark: 1 })),
'constructor should throw when strategy is CountQueuingStrategy');
assert_throws_js(RangeError,
() => new ReadableStream({ type: 'bytes' }, new ByteLengthQueuingStrategy({ highWaterMark: 512 })),
'constructor should throw when strategy is ByteLengthQueuingStrategy');
class HasSizeMethod {
size() {}
}
assert_throws_js(RangeError, () => new ReadableStream({ type: 'bytes' }, new HasSizeMethod()),
'constructor should throw when size on the prototype chain');
}, 'ReadableStream constructor should not accept a strategy with a size defined if type is "bytes"');
promise_test(async t => {
const stream = new ReadableStream({
pull: t.step_func(c => {
const view = new Uint8Array(c.byobRequest.view.buffer, 0, 1);
view[0] = 1;
c.byobRequest.respondWithNewView(view);
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const result = await reader.read(new Uint8Array([4, 5, 6]));
assert_false(result.done, 'result.done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'result.value.byteOffset');
assert_equals(view.byteLength, 1, 'result.value.byteLength');
assert_equals(view[0], 1, 'result.value[0]');
assert_equals(view.buffer.byteLength, 3, 'result.value.buffer.byteLength');
assert_array_equals([...new Uint8Array(view.buffer)], [1, 5, 6], 'result.value.buffer');
}, 'ReadableStream with byte source: respondWithNewView() with a smaller view');
promise_test(async t => {
const stream = new ReadableStream({
pull: t.step_func(c => {
const view = new Uint8Array(c.byobRequest.view.buffer, 0, 0);
c.close();
c.byobRequest.respondWithNewView(view);
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const result = await reader.read(new Uint8Array([4, 5, 6]));
assert_true(result.done, 'result.done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'result.value.byteOffset');
assert_equals(view.byteLength, 0, 'result.value.byteLength');
assert_equals(view.buffer.byteLength, 3, 'result.value.buffer.byteLength');
assert_array_equals([...new Uint8Array(view.buffer)], [4, 5, 6], 'result.value.buffer');
}, 'ReadableStream with byte source: respondWithNewView() with a zero-length view (in the closed state)');
promise_test(async t => {
let controller;
let resolvePullCalledPromise;
const pullCalledPromise = new Promise(resolve => {
resolvePullCalledPromise = resolve;
});
const stream = new ReadableStream({
start: t.step_func((c) => {
controller = c;
}),
pull: t.step_func(() => {
resolvePullCalledPromise();
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const readPromise = reader.read(new Uint8Array([4, 5, 6]));
await pullCalledPromise;
// Transfer the original BYOB request's buffer, and respond with a new view on that buffer
const transferredView = await transferArrayBufferView(controller.byobRequest.view);
const newView = transferredView.subarray(0, 1);
newView[0] = 42;
controller.byobRequest.respondWithNewView(newView);
const result = await readPromise;
assert_false(result.done, 'result.done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'result.value.byteOffset');
assert_equals(view.byteLength, 1, 'result.value.byteLength');
assert_equals(view[0], 42, 'result.value[0]');
assert_equals(view.buffer.byteLength, 3, 'result.value.buffer.byteLength');
assert_array_equals([...new Uint8Array(view.buffer)], [42, 5, 6], 'result.value.buffer');
}, 'ReadableStream with byte source: respondWithNewView() with a transferred non-zero-length view ' +
'(in the readable state)');
promise_test(async t => {
let controller;
let resolvePullCalledPromise;
const pullCalledPromise = new Promise(resolve => {
resolvePullCalledPromise = resolve;
});
const stream = new ReadableStream({
start: t.step_func((c) => {
controller = c;
}),
pull: t.step_func(() => {
resolvePullCalledPromise();
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const readPromise = reader.read(new Uint8Array([4, 5, 6]));
await pullCalledPromise;
// Transfer the original BYOB request's buffer, and respond with an empty view on that buffer
const transferredView = await transferArrayBufferView(controller.byobRequest.view);
const newView = transferredView.subarray(0, 0);
controller.close();
controller.byobRequest.respondWithNewView(newView);
const result = await readPromise;
assert_true(result.done, 'result.done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'result.value.byteOffset');
assert_equals(view.byteLength, 0, 'result.value.byteLength');
assert_equals(view.buffer.byteLength, 3, 'result.value.buffer.byteLength');
assert_array_equals([...new Uint8Array(view.buffer)], [4, 5, 6], 'result.value.buffer');
}, 'ReadableStream with byte source: respondWithNewView() with a transferred zero-length view ' +
'(in the closed state)');
promise_test(async t => {
let controller;
let pullCount = 0;
const rs = new ReadableStream({
type: 'bytes',
autoAllocateChunkSize: 10,
start: t.step_func((c) => {
controller = c;
}),
pull: t.step_func(() => {
++pullCount;
})
});
await flushAsyncEvents();
assert_equals(pullCount, 0, 'pull() must not have been invoked yet');
const reader1 = rs.getReader();
const read1 = reader1.read();
assert_equals(pullCount, 1, 'pull() must have been invoked once');
const byobRequest1 = controller.byobRequest;
assert_equals(byobRequest1.view.byteLength, 10, 'first byobRequest.view.byteLength');
// enqueue() must discard the auto-allocated BYOB request
controller.enqueue(new Uint8Array([1, 2, 3]));
assert_equals(byobRequest1.view, null, 'first byobRequest must be invalidated after enqueue()');
const result1 = await read1;
assert_false(result1.done, 'first result.done');
const view1 = result1.value;
assert_equals(view1.byteOffset, 0, 'first result.value.byteOffset');
assert_equals(view1.byteLength, 3, 'first result.value.byteLength');
assert_array_equals([...new Uint8Array(view1.buffer)], [1, 2, 3], 'first result.value.buffer');
reader1.releaseLock();
// read(view) should work after discarding the auto-allocated BYOB request
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint8Array([4, 5, 6]));
assert_equals(pullCount, 2, 'pull() must have been invoked twice');
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2.view.byteOffset, 0, 'second byobRequest.view.byteOffset');
assert_equals(byobRequest2.view.byteLength, 3, 'second byobRequest.view.byteLength');
assert_array_equals([...new Uint8Array(byobRequest2.view.buffer)], [4, 5, 6], 'second byobRequest.view.buffer');
byobRequest2.respond(3);
assert_equals(byobRequest2.view, null, 'second byobRequest must be invalidated after respond()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
const view2 = result2.value;
assert_equals(view2.byteOffset, 0, 'second result.value.byteOffset');
assert_equals(view2.byteLength, 3, 'second result.value.byteLength');
assert_array_equals([...new Uint8Array(view2.buffer)], [4, 5, 6], 'second result.value.buffer');
reader2.releaseLock();
assert_equals(pullCount, 2, 'pull() must only have been invoked twice');
}, 'ReadableStream with byte source: enqueue() discards auto-allocated BYOB request');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader({ mode: 'byob' });
const read1 = reader1.read(new Uint8Array([1, 2, 3]));
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array([1, 2, 3]), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint8Array([4, 5, 6]));
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
assert_equals(controller.byobRequest, byobRequest1, 'byobRequest should be unchanged');
assert_array_equals([...new Uint8Array(byobRequest1.view.buffer)], [1, 2, 3], 'byobRequest.view.buffer should be unchanged');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// respond() should fulfill the *second* read() request
byobRequest1.view[0] = 11;
byobRequest1.respond(1);
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2, null, 'byobRequest should be null after respond()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([11, 5, 6]).subarray(0, 1), 'second result.value');
}, 'ReadableStream with byte source: releaseLock() with pending read(view), read(view) on second reader, respond()');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader({ mode: 'byob' });
const read1 = reader1.read(new Uint8Array([1, 2, 3]));
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array([1, 2, 3]), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint16Array(1));
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
assert_equals(controller.byobRequest, byobRequest1, 'byobRequest should be unchanged');
assert_array_equals([...new Uint8Array(byobRequest1.view.buffer)], [1, 2, 3], 'byobRequest.view.buffer should be unchanged');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// respond(1) should partially fill the second read(), but not yet fulfill it
byobRequest1.view[0] = 0x11;
byobRequest1.respond(1);
// second BYOB request should use remaining buffer from the second read()
const byobRequest2 = controller.byobRequest;
assert_not_equals(byobRequest2, null, 'second byobRequest should exist');
assert_typed_array_equals(byobRequest2.view, new Uint8Array([0x11, 0]).subarray(1, 2), 'second byobRequest.view');
// second respond(1) should fill the read request and fulfill it
byobRequest2.view[0] = 0x22;
byobRequest2.respond(1);
const result2 = await read2;
assert_false(result2.done, 'second result.done');
const view2 = result2.value;
assert_equals(view2.byteOffset, 0, 'second result.value.byteOffset');
assert_equals(view2.byteLength, 2, 'second result.value.byteLength');
const dataView2 = new DataView(view2.buffer, view2.byteOffset, view2.byteLength);
assert_equals(dataView2.getUint16(0), 0x1122, 'second result.value[0]');
}, 'ReadableStream with byte source: releaseLock() with pending read(view), read(view) on second reader with ' +
'1 element Uint16Array, respond(1)');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader({ mode: 'byob' });
const read1 = reader1.read(new Uint8Array([1, 2, 3]));
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array([1, 2, 3]), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint8Array([4, 5]));
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
assert_equals(controller.byobRequest, byobRequest1, 'byobRequest should be unchanged');
assert_array_equals([...new Uint8Array(byobRequest1.view.buffer)], [1, 2, 3], 'byobRequest.view.buffer should be unchanged');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// respond(3) should fulfill the second read(), and put 1 remaining byte in the queue
byobRequest1.view[0] = 6;
byobRequest1.view[1] = 7;
byobRequest1.view[2] = 8;
byobRequest1.respond(3);
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2, null, 'byobRequest should be null after respond()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([6, 7]), 'second result.value');
// third read() should fulfill with the remaining byte
const result3 = await reader2.read(new Uint8Array([0, 0, 0]));
assert_false(result3.done, 'third result.done');
assert_typed_array_equals(result3.value, new Uint8Array([8, 0, 0]).subarray(0, 1), 'third result.value');
}, 'ReadableStream with byte source: releaseLock() with pending read(view), read(view) on second reader with ' +
'2 element Uint8Array, respond(3)');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader({ mode: 'byob' });
const read1 = reader1.read(new Uint8Array([1, 2, 3]));
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array([1, 2, 3]), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint8Array([4, 5, 6]));
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// respondWithNewView() should fulfill the *second* read() request
byobRequest1.view[0] = 11;
byobRequest1.view[1] = 12;
byobRequest1.respondWithNewView(byobRequest1.view.subarray(0, 2));
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2, null, 'byobRequest should be null after respondWithNewView()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([11, 12, 6]).subarray(0, 2), 'second result.value');
}, 'ReadableStream with byte source: releaseLock() with pending read(view), read(view) on second reader, respondWithNewView()');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader({ mode: 'byob' });
const read1 = reader1.read(new Uint8Array([1, 2, 3]));
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array([1, 2, 3]), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint8Array([4, 5, 6]));
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// enqueue() should fulfill the *second* read() request
controller.enqueue(new Uint8Array([11, 12]));
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2, null, 'byobRequest should be null after enqueue()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([11, 12, 6]).subarray(0, 2), 'second result.value');
}, 'ReadableStream with byte source: releaseLock() with pending read(view), read(view) on second reader, enqueue()');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader({ mode: 'byob' });
const read1 = reader1.read(new Uint8Array([1, 2, 3]));
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array([1, 2, 3]), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint8Array([4, 5, 6]));
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// close() followed by respond(0) should fulfill the second read()
controller.close();
byobRequest1.respond(0);
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2, null, 'byobRequest should be null after respond()');
const result2 = await read2;
assert_true(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([4, 5, 6]).subarray(0, 0), 'second result.value');
}, 'ReadableStream with byte source: releaseLock() with pending read(view), read(view) on second reader, ' +
'close(), respond(0)');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
autoAllocateChunkSize: 4,
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader();
const read1 = reader1.read();
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array(4), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader();
const read2 = reader2.read();
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// respond() should fulfill the *second* read() request
byobRequest1.view[0] = 11;
byobRequest1.respond(1);
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2, null, 'byobRequest should be null after respond()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([11, 0, 0, 0]).subarray(0, 1), 'second result.value');
}, 'ReadableStream with byte source: autoAllocateChunkSize, releaseLock() with pending read(), read() on second reader, respond()');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
autoAllocateChunkSize: 4,
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader();
const read1 = reader1.read();
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array(4), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader();
const read2 = reader2.read();
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// enqueue() should fulfill the *second* read() request
controller.enqueue(new Uint8Array([11]));
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2, null, 'byobRequest should be null after enqueue()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([11]), 'second result.value');
}, 'ReadableStream with byte source: autoAllocateChunkSize, releaseLock() with pending read(), read() on second reader, enqueue()');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
autoAllocateChunkSize: 4,
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader();
const read1 = reader1.read();
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array(4), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint8Array([4, 5, 6]));
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// respond() should fulfill the *second* read() request
byobRequest1.view[0] = 11;
byobRequest1.respond(1);
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2, null, 'byobRequest should be null after respond()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([11, 5, 6]).subarray(0, 1), 'second result.value');
}, 'ReadableStream with byte source: autoAllocateChunkSize, releaseLock() with pending read(), read(view) on second reader, respond()');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
autoAllocateChunkSize: 4,
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader();
const read1 = reader1.read();
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array(4), 'first byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint8Array([4, 5, 6]));
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// enqueue() should fulfill the *second* read() request
controller.enqueue(new Uint8Array([11]));
const byobRequest2 = controller.byobRequest;
assert_equals(byobRequest2, null, 'byobRequest should be null after enqueue()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([11, 5, 6]).subarray(0, 1), 'second result.value');
}, 'ReadableStream with byte source: autoAllocateChunkSize, releaseLock() with pending read(), read(view) on second reader, enqueue()');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader({ mode: 'byob' });
const read1 = reader1.read(new Uint16Array(1));
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array([0, 0]), 'first byobRequest.view');
// respond(1) should partially fill the first read(), but not yet fulfill it
byobRequest1.view[0] = 0x11;
byobRequest1.respond(1);
const byobRequest2 = controller.byobRequest;
assert_not_equals(byobRequest2, null, 'second byobRequest should exist');
assert_typed_array_equals(byobRequest2.view, new Uint8Array([0x11, 0]).subarray(1, 2), 'second byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader({ mode: 'byob' });
const read2 = reader2.read(new Uint16Array(1));
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
assert_equals(controller.byobRequest, byobRequest2, 'byobRequest should be unchanged');
assert_typed_array_equals(byobRequest2.view, new Uint8Array([0x11, 0]).subarray(1, 2), 'byobRequest.view should be unchanged');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// second respond(1) should fill the read request and fulfill it
byobRequest2.view[0] = 0x22;
byobRequest2.respond(1);
assert_equals(controller.byobRequest, null, 'byobRequest should be invalidated after second respond()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
const view2 = result2.value;
assert_equals(view2.byteOffset, 0, 'second result.value.byteOffset');
assert_equals(view2.byteLength, 2, 'second result.value.byteLength');
const dataView2 = new DataView(view2.buffer, view2.byteOffset, view2.byteLength);
assert_equals(dataView2.getUint16(0), 0x1122, 'second result.value[0]');
}, 'ReadableStream with byte source: read(view) with 1 element Uint16Array, respond(1), releaseLock(), read(view) on ' +
'second reader with 1 element Uint16Array, respond(1)');
promise_test(async t => {
let controller;
const rs = new ReadableStream({
type: 'bytes',
start: t.step_func((c) => {
controller = c;
})
});
await flushAsyncEvents();
const reader1 = rs.getReader({ mode: 'byob' });
const read1 = reader1.read(new Uint16Array(1));
const byobRequest1 = controller.byobRequest;
assert_not_equals(byobRequest1, null, 'first byobRequest should exist');
assert_typed_array_equals(byobRequest1.view, new Uint8Array([0, 0]), 'first byobRequest.view');
// respond(1) should partially fill the first read(), but not yet fulfill it
byobRequest1.view[0] = 0x11;
byobRequest1.respond(1);
const byobRequest2 = controller.byobRequest;
assert_not_equals(byobRequest2, null, 'second byobRequest should exist');
assert_typed_array_equals(byobRequest2.view, new Uint8Array([0x11, 0]).subarray(1, 2), 'second byobRequest.view');
// releaseLock() should reject the pending read, but *not* invalidate the BYOB request
reader1.releaseLock();
const reader2 = rs.getReader();
const read2 = reader2.read();
assert_not_equals(controller.byobRequest, null, 'byobRequest should not be invalidated after releaseLock()');
assert_equals(controller.byobRequest, byobRequest2, 'byobRequest should be unchanged');
assert_typed_array_equals(byobRequest2.view, new Uint8Array([0x11, 0]).subarray(1, 2), 'byobRequest.view should be unchanged');
await promise_rejects_js(t, TypeError, read1, 'pending read must reject after releaseLock()');
// enqueue() should fulfill the read request and put remaining byte in the queue
controller.enqueue(new Uint8Array([0x22]));
assert_equals(controller.byobRequest, null, 'byobRequest should be invalidated after second respond()');
const result2 = await read2;
assert_false(result2.done, 'second result.done');
assert_typed_array_equals(result2.value, new Uint8Array([0x11]), 'second result.value');
const result3 = await reader2.read();
assert_false(result3.done, 'third result.done');
assert_typed_array_equals(result3.value, new Uint8Array([0x22]), 'third result.value');
}, 'ReadableStream with byte source: read(view) with 1 element Uint16Array, respond(1), releaseLock(), read() on ' +
'second reader, enqueue()');
promise_test(async t => {
// Tests https://github.com/nodejs/node/issues/41886
const stream = new ReadableStream({
type: 'bytes',
autoAllocateChunkSize: 10,
pull: t.step_func((c) => {
const newView = new Uint8Array(c.byobRequest.view.buffer, 0, 3);
newView.set([20, 21, 22]);
c.byobRequest.respondWithNewView(newView);
})
});
const reader = stream.getReader();
const result = await reader.read();
assert_false(result.done, 'result.done');
const view = result.value;
assert_equals(view.byteOffset, 0, 'result.value.byteOffset');
assert_equals(view.byteLength, 3, 'result.value.byteLength');
assert_equals(view.buffer.byteLength, 10, 'result.value.buffer.byteLength');
assert_array_equals([...new Uint8Array(view)], [20, 21, 22], 'result.value');
}, 'ReadableStream with byte source: autoAllocateChunkSize, read(), respondWithNewView()');
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