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test-whatwg-readablestream.js
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1747 lines (1479 loc) · 39.9 KB
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// Flags: --expose-internals --no-warnings
'use strict';
const common = require('../common');
const { isDisturbed, isErrored, isReadable } = require('stream');
const assert = require('assert');
const {
isPromise,
} = require('util/types');
const {
setImmediate: delay
} = require('timers/promises');
const {
ByteLengthQueuingStrategy,
CountQueuingStrategy,
ReadableStream,
ReadableStreamDefaultReader,
ReadableStreamDefaultController,
ReadableByteStreamController,
ReadableStreamBYOBReader,
ReadableStreamBYOBRequest,
WritableStream,
} = require('stream/web');
const {
readableStreamPipeTo,
readableStreamTee,
readableByteStreamControllerConvertPullIntoDescriptor,
readableStreamDefaultControllerEnqueue,
readableByteStreamControllerEnqueue,
readableStreamDefaultControllerCanCloseOrEnqueue,
readableByteStreamControllerClose,
readableByteStreamControllerRespond,
readableStreamReaderGenericRelease,
} = require('internal/webstreams/readablestream');
const {
kState
} = require('internal/webstreams/util');
const {
createReadStream,
readFileSync,
} = require('fs');
const {
Buffer,
} = require('buffer');
const {
kTransfer,
} = require('internal/worker/js_transferable');
const {
inspect,
} = require('util');
{
const r = new ReadableStream();
assert.strictEqual(typeof r.locked, 'boolean');
assert.strictEqual(typeof r.cancel, 'function');
assert.strictEqual(typeof r.getReader, 'function');
assert.strictEqual(typeof r.pipeThrough, 'function');
assert.strictEqual(typeof r.pipeTo, 'function');
assert.strictEqual(typeof r.tee, 'function');
['', null, 'asdf'].forEach((mode) => {
assert.throws(() => r.getReader({ mode }), {
code: 'ERR_INVALID_ARG_VALUE',
});
});
[1, 'asdf'].forEach((options) => {
assert.throws(() => r.getReader(options), {
code: 'ERR_INVALID_ARG_TYPE',
});
});
assert(!r.locked);
r.getReader();
assert(r.locked);
}
{
// Throw error and return rejected promise in `cancel()` method
// would execute same cleanup code
const r1 = new ReadableStream({
cancel: () => {
return Promise.reject('Cancel Error');
},
});
r1.cancel().finally(common.mustCall(() => {
const controllerState = r1[kState].controller[kState];
assert.strictEqual(controllerState.pullAlgorithm, undefined);
assert.strictEqual(controllerState.cancelAlgorithm, undefined);
assert.strictEqual(controllerState.sizeAlgorithm, undefined);
})).catch(() => {});
const r2 = new ReadableStream({
cancel() {
throw new Error('Cancel Error');
}
});
r2.cancel().finally(common.mustCall(() => {
const controllerState = r2[kState].controller[kState];
assert.strictEqual(controllerState.pullAlgorithm, undefined);
assert.strictEqual(controllerState.cancelAlgorithm, undefined);
assert.strictEqual(controllerState.sizeAlgorithm, undefined);
})).catch(() => {});
}
{
const source = {
start: common.mustCall((controller) => {
assert(controller instanceof ReadableStreamDefaultController);
}),
pull: common.mustCall((controller) => {
assert(controller instanceof ReadableStreamDefaultController);
}),
cancel: common.mustNotCall(),
};
new ReadableStream(source);
}
{
const source = {
start: common.mustCall(async (controller) => {
assert(controller instanceof ReadableStreamDefaultController);
}),
pull: common.mustCall(async (controller) => {
assert(controller instanceof ReadableStreamDefaultController);
}),
cancel: common.mustNotCall(),
};
new ReadableStream(source);
}
{
const source = {
start: common.mustCall((controller) => {
assert(controller instanceof ReadableByteStreamController);
}),
pull: common.mustNotCall(),
cancel: common.mustNotCall(),
type: 'bytes',
};
new ReadableStream(source);
}
{
const source = {
start: common.mustCall(async (controller) => {
assert(controller instanceof ReadableByteStreamController);
}),
pull: common.mustNotCall(),
cancel: common.mustNotCall(),
type: 'bytes',
};
new ReadableStream(source);
}
{
const source = {
start: common.mustCall(async (controller) => {
assert(controller instanceof ReadableByteStreamController);
}),
pull: common.mustCall(async (controller) => {
assert(controller instanceof ReadableByteStreamController);
}),
cancel: common.mustNotCall(),
type: 'bytes',
};
new ReadableStream(source, { highWaterMark: 10 });
}
{
new ReadableStream({});
new ReadableStream([]);
new ReadableStream({}, null);
new ReadableStream({}, {});
new ReadableStream({}, []);
}
['a', false, 1, null].forEach((source) => {
assert.throws(() => {
new ReadableStream(source);
}, {
code: 'ERR_INVALID_ARG_TYPE',
});
});
['a', false, 1].forEach((strategy) => {
assert.throws(() => {
new ReadableStream({}, strategy);
}, {
code: 'ERR_INVALID_ARG_TYPE',
});
});
['a', {}, false].forEach((size) => {
assert.throws(() => {
new ReadableStream({}, { size });
}, {
code: 'ERR_INVALID_ARG_TYPE',
});
});
['a', {}].forEach((highWaterMark) => {
assert.throws(() => {
new ReadableStream({}, { highWaterMark });
}, {
code: 'ERR_INVALID_ARG_VALUE',
});
assert.throws(() => {
new ReadableStream({ type: 'bytes' }, { highWaterMark });
}, {
code: 'ERR_INVALID_ARG_VALUE',
});
});
[-1, NaN].forEach((highWaterMark) => {
assert.throws(() => {
new ReadableStream({}, { highWaterMark });
}, {
code: 'ERR_INVALID_ARG_VALUE',
});
assert.throws(() => {
new ReadableStream({ type: 'bytes' }, { highWaterMark });
}, {
code: 'ERR_INVALID_ARG_VALUE',
});
});
{
new ReadableStream({}, new ByteLengthQueuingStrategy({ highWaterMark: 1 }));
new ReadableStream({}, new CountQueuingStrategy({ highWaterMark: 1 }));
}
{
const strategy = new ByteLengthQueuingStrategy({ highWaterMark: 1 });
assert.strictEqual(strategy.highWaterMark, 1);
assert.strictEqual(strategy.size(new ArrayBuffer(10)), 10);
const { size } = strategy;
assert.strictEqual(size(new ArrayBuffer(10)), 10);
}
{
const strategy = new CountQueuingStrategy({ highWaterMark: 1 });
assert.strictEqual(strategy.highWaterMark, 1);
assert.strictEqual(strategy.size(new ArrayBuffer(10)), 1);
const { size } = strategy;
assert.strictEqual(size(new ArrayBuffer(10)), 1);
}
{
const r = new ReadableStream({
async start() {
throw new Error('boom');
}
});
setImmediate(common.mustCall(() => {
assert.strictEqual(r[kState].state, 'errored');
assert.match(r[kState].storedError?.message, /boom/);
}));
}
{
const data = Buffer.from('hello');
const r = new ReadableStream({
start(controller) {
controller.enqueue(data);
controller.close();
},
});
(async function read() {
const reader = r.getReader();
let res = await reader.read();
if (res.done) return;
const buf = Buffer.from(res.value);
assert.strictEqual(buf.toString(), data.toString());
res = await reader.read();
assert(res.done);
})().then(common.mustCall());
}
{
const r = new ReadableStream({
start(controller) {
controller.close();
},
});
(async function read() {
const reader = r.getReader();
const res = await reader.read();
assert(res.done);
})().then(common.mustCall());
}
assert.throws(() => {
new ReadableStream({
get start() { throw new Error('boom1'); }
}, {
get size() { throw new Error('boom2'); }
});
}, /boom2/);
{
const stream = new ReadableStream();
const reader = stream.getReader();
assert(stream.locked);
assert.strictEqual(reader[kState].stream, stream);
assert.strictEqual(stream[kState].reader, reader);
assert.throws(() => stream.getReader(), {
code: 'ERR_INVALID_STATE',
});
assert(reader instanceof ReadableStreamDefaultReader);
assert(isPromise(reader.closed));
assert.strictEqual(typeof reader.cancel, 'function');
assert.strictEqual(typeof reader.read, 'function');
assert.strictEqual(typeof reader.releaseLock, 'function');
const read1 = reader.read();
const read2 = reader.read();
assert.rejects(read1, () => true).then(common.mustCall());
assert.rejects(read2, () => true).then(common.mustCall());
assert.notStrictEqual(read1, read2);
assert.strictEqual(reader[kState].readRequests.length, 2);
delay().then(common.mustCall());
assert(stream.locked);
reader.releaseLock();
assert(!stream.locked);
}
{
const stream = new ReadableStream();
const reader = stream.getReader();
const closedBefore = reader.closed;
assert(stream.locked);
reader.releaseLock();
assert(!stream.locked);
const closedAfter = reader.closed;
assert.strictEqual(closedBefore, closedAfter);
assert.rejects(reader.read(), {
code: 'ERR_INVALID_STATE',
}).then(common.mustCall());
assert.rejects(closedBefore, {
code: 'ERR_INVALID_STATE',
}).then(common.mustCall());
}
{
const stream = new ReadableStream();
const iterable = stream.values();
readableStreamReaderGenericRelease(stream[kState].reader);
assert.rejects(iterable.next(), {
code: 'ERR_INVALID_STATE',
}).then(common.mustCall());
}
{
const stream = new ReadableStream();
const iterable = stream.values();
readableStreamReaderGenericRelease(stream[kState].reader);
assert.rejects(iterable.return(), {
code: 'ERR_INVALID_STATE',
}).then(common.mustCall());
}
{
const stream = new ReadableStream({
start(controller) {
controller.enqueue(Buffer.from('hello'));
}
});
const reader = stream.getReader();
assert.rejects(stream.cancel(), {
code: 'ERR_INVALID_STATE',
}).then(common.mustCall());
reader.cancel();
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, undefined);
assert(done);
}));
}
{
const stream = new ReadableStream({
start(controller) {
controller.close();
}
});
assert(!stream.locked);
const cancel1 = stream.cancel();
const cancel2 = stream.cancel();
assert.notStrictEqual(cancel1, cancel2);
Promise.all([cancel1, cancel2]).then(common.mustCall((res) => {
assert.deepStrictEqual(res, [undefined, undefined]);
}));
}
{
const stream = new ReadableStream({
start(controller) {
controller.close();
}
});
stream.getReader().releaseLock();
stream.getReader().releaseLock();
stream.getReader();
}
{
const stream = new ReadableStream({
start(controller) {
controller.close();
}
});
stream.getReader();
assert.throws(() => stream.getReader(), {
code: 'ERR_INVALID_STATE',
});
}
{
const stream = new ReadableStream({
start(controller) {
controller.close();
},
});
const reader = stream.getReader();
reader.closed.then(common.mustCall());
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, undefined);
assert(done);
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, undefined);
assert(done);
}));
}));
}
{
const stream = new ReadableStream({
start(controller) {
controller.close();
},
});
const reader = stream.getReader();
const closedBefore = reader.closed;
reader.releaseLock();
const closedAfter = reader.closed;
assert.notStrictEqual(closedBefore, closedAfter);
closedBefore.then(common.mustCall());
assert.rejects(closedAfter, {
code: 'ERR_INVALID_STATE',
}).then(common.mustCall());
}
{
let c;
const stream = new ReadableStream({
start(controller) {
c = controller;
},
});
const reader = stream.getReader();
c.close();
const closedBefore = reader.closed;
reader.releaseLock();
const closedAfter = reader.closed;
assert.notStrictEqual(closedBefore, closedAfter);
closedBefore.then(common.mustCall());
assert.rejects(closedAfter, {
code: 'ERR_INVALID_STATE',
}).then(common.mustCall());
}
{
const stream = new ReadableStream({
start(controller) {
controller.close();
},
});
const reader = stream.getReader();
const cancel1 = reader.cancel();
const cancel2 = reader.cancel();
const closed = reader.closed;
assert.notStrictEqual(cancel1, cancel2);
assert.notStrictEqual(cancel1, closed);
assert.notStrictEqual(cancel2, closed);
Promise.all([cancel1, cancel2]).then(common.mustCall((res) => {
assert.deepStrictEqual(res, [undefined, undefined]);
}));
}
{
let c;
const stream = new ReadableStream({
start(controller) {
c = controller;
},
});
const reader = stream.getReader();
c.close();
const cancel1 = reader.cancel();
const cancel2 = reader.cancel();
const closed = reader.closed;
assert.notStrictEqual(cancel1, cancel2);
assert.notStrictEqual(cancel1, closed);
assert.notStrictEqual(cancel2, closed);
Promise.all([cancel1, cancel2]).then(common.mustCall((res) => {
assert.deepStrictEqual(res, [undefined, undefined]);
}));
}
{
const stream = new ReadableStream();
const cancel1 = stream.cancel();
const cancel2 = stream.cancel();
assert.notStrictEqual(cancel1, cancel2);
Promise.all([cancel1, cancel2]).then(common.mustCall((res) => {
assert.deepStrictEqual(res, [undefined, undefined]);
}));
stream.getReader().read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, undefined);
assert(done);
}));
}
{
const error = new Error('boom');
const stream = new ReadableStream({
start(controller) {
controller.error(error);
}
});
stream.getReader().releaseLock();
const reader = stream.getReader();
assert.rejects(reader.closed, error).then(common.mustCall());
assert.rejects(reader.read(), error).then(common.mustCall());
assert.rejects(reader.read(), error).then(common.mustCall());
}
{
const error = new Error('boom');
const stream = new ReadableStream({
start(controller) {
controller.error(error);
}
});
const reader = stream.getReader();
const cancel1 = reader.cancel();
const cancel2 = reader.cancel();
assert.notStrictEqual(cancel1, cancel2);
assert.rejects(cancel1, error).then(common.mustCall());
assert.rejects(cancel2, error).then(common.mustCall());
}
{
const error = new Error('boom');
const stream = new ReadableStream({
async start(controller) {
throw error;
}
});
stream.getReader().releaseLock();
const reader = stream.getReader();
assert.rejects(reader.closed, error).then(common.mustCall());
assert.rejects(reader.read(), error).then(common.mustCall());
assert.rejects(reader.read(), error).then(common.mustCall());
}
{
const buf1 = Buffer.from('hello');
const buf2 = Buffer.from('there');
let doClose;
const stream = new ReadableStream({
start(controller) {
controller.enqueue(buf1);
controller.enqueue(buf2);
doClose = controller.close.bind(controller);
}
});
const reader = stream.getReader();
doClose();
reader.read().then(common.mustCall(({ value, done }) => {
assert.deepStrictEqual(value, buf1);
assert(!done);
reader.read().then(common.mustCall(({ value, done }) => {
assert.deepStrictEqual(value, buf2);
assert(!done);
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, undefined);
assert(done);
}));
}));
}));
}
{
const buf1 = Buffer.from('hello');
const buf2 = Buffer.from('there');
const stream = new ReadableStream({
start(controller) {
controller.enqueue(buf1);
controller.enqueue(buf2);
}
});
const reader = stream.getReader();
reader.read().then(common.mustCall(({ value, done }) => {
assert.deepStrictEqual(value, buf1);
assert(!done);
reader.read().then(common.mustCall(({ value, done }) => {
assert.deepStrictEqual(value, buf2);
assert(!done);
reader.read().then(common.mustNotCall('never settling promise expected'));
delay().then(common.mustCall());
}));
}));
}
{
const stream = new ReadableStream({
start(controller) {
controller.enqueue('a');
controller.enqueue('b');
controller.close();
}
});
const { 0: s1, 1: s2 } = stream.tee();
assert(s1 instanceof ReadableStream);
assert(s2 instanceof ReadableStream);
async function read(stream) {
const reader = stream.getReader();
assert.deepStrictEqual(
await reader.read(), { value: 'a', done: false });
assert.deepStrictEqual(
await reader.read(), { value: 'b', done: false });
assert.deepStrictEqual(
await reader.read(), { value: undefined, done: true });
}
Promise.all([
read(s1),
read(s2),
]).then(common.mustCall());
}
{
const error = new Error('boom');
const stream = new ReadableStream({
start(controller) {
controller.enqueue('a');
controller.enqueue('b');
},
pull() { throw error; }
});
const { 0: s1, 1: s2 } = stream.tee();
assert(stream.locked);
assert(s1 instanceof ReadableStream);
assert(s2 instanceof ReadableStream);
const reader1 = s1.getReader();
const reader2 = s2.getReader();
const closed1 = reader1.closed;
const closed2 = reader2.closed;
assert.notStrictEqual(closed1, closed2);
assert.rejects(closed1, error).then(common.mustCall());
assert.rejects(closed2, error).then(common.mustCall());
reader1.read();
}
{
const stream = new ReadableStream({
start(controller) {
controller.enqueue('a');
controller.enqueue('b');
controller.close();
}
});
const { 0: s1, 1: s2 } = stream.tee();
assert(s1 instanceof ReadableStream);
assert(s2 instanceof ReadableStream);
s2.cancel();
async function read(stream, canceled = false) {
const reader = stream.getReader();
if (!canceled) {
assert.deepStrictEqual(
await reader.read(), { value: 'a', done: false });
assert.deepStrictEqual(
await reader.read(), { value: 'b', done: false });
}
assert.deepStrictEqual(
await reader.read(), { value: undefined, done: true });
}
Promise.all([
read(s1),
read(s2, true),
]).then(common.mustCall());
}
{
const error1 = new Error('boom1');
const error2 = new Error('boom2');
const stream = new ReadableStream({
cancel: common.mustCall((reason) => {
assert.deepStrictEqual(reason, [error1, error2]);
}),
});
const { 0: s1, 1: s2 } = stream.tee();
s1.cancel(error1);
s2.cancel(error2);
}
{
const error1 = new Error('boom1');
const error2 = new Error('boom2');
const stream = new ReadableStream({
cancel: common.mustCall((reason) => {
assert.deepStrictEqual(reason, [error1, error2]);
}),
});
const { 0: s1, 1: s2 } = stream.tee();
s2.cancel(error2);
s1.cancel(error1);
}
{
const error = new Error('boom1');
const stream = new ReadableStream({
cancel() {
throw error;
}
});
const { 0: s1, 1: s2 } = stream.tee();
assert.rejects(s1.cancel(), error).then(common.mustCall());
assert.rejects(s2.cancel(), error).then(common.mustCall());
}
{
const error = new Error('boom1');
let c;
const stream = new ReadableStream({
start(controller) {
c = controller;
}
});
const { 0: s1, 1: s2 } = stream.tee();
c.error(error);
assert.rejects(s1.cancel(), error).then(common.mustCall());
assert.rejects(s2.cancel(), error).then(common.mustCall());
}
{
const error = new Error('boom1');
let c;
const stream = new ReadableStream({
start(controller) {
c = controller;
}
});
const { 0: s1, 1: s2 } = stream.tee();
const reader1 = s1.getReader();
const reader2 = s2.getReader();
assert.rejects(reader1.closed, error).then(common.mustCall());
assert.rejects(reader2.closed, error).then(common.mustCall());
assert.rejects(reader1.read(), error).then(common.mustCall());
assert.rejects(reader2.read(), error).then(common.mustCall());
setImmediate(() => c.error(error));
}
{
let pullCount = 0;
const stream = new ReadableStream({
pull(controller) {
if (pullCount)
controller.enqueue(pullCount);
pullCount++;
},
});
const reader = stream.getReader();
queueMicrotask(common.mustCall(() => {
assert.strictEqual(pullCount, 1);
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, 1);
assert(!done);
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, 2);
assert(!done);
}));
}));
}));
}
{
const stream = new ReadableStream({
start(controller) {
controller.enqueue('a');
},
pull: common.mustCall(),
});
stream.getReader().read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, 'a');
assert(!done);
}));
}
{
const stream = new ReadableStream({
start(controller) {
controller.enqueue('a');
controller.enqueue('b');
},
pull: common.mustCall(),
});
const reader = stream.getReader();
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, 'a');
assert(!done);
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, 'b');
assert(!done);
}));
}));
}
{
const stream = new ReadableStream({
start(controller) {
controller.enqueue('a');
controller.enqueue('b');
controller.close();
},
pull: common.mustNotCall(),
});
const reader = stream.getReader();
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, 'a');
assert(!done);
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, 'b');
assert(!done);
reader.read().then(common.mustCall(({ value, done }) => {
assert.strictEqual(value, undefined);
assert(done);
}));
}));
}));
}
{
let res;
let promise;
let calls = 0;
const stream = new ReadableStream({
pull(controller) {
controller.enqueue(++calls);
promise = new Promise((resolve) => res = resolve);
return promise;
}
});
const reader = stream.getReader();
(async () => {
await reader.read();
assert.strictEqual(calls, 1);
await delay();
assert.strictEqual(calls, 1);
res();
await delay();
assert.strictEqual(calls, 2);
})().then(common.mustCall());
}
{
const stream = new ReadableStream({
start(controller) {
controller.enqueue('a');
controller.enqueue('b');
controller.enqueue('c');
},
pull: common.mustCall(4),
}, {
highWaterMark: Infinity,
size() { return 1; }
});
const reader = stream.getReader();
(async () => {
await delay();
await reader.read();
await reader.read();
await reader.read();
})().then(common.mustCall());
}
{
const stream = new ReadableStream({
start(controller) {
controller.enqueue('a');
controller.enqueue('b');
controller.enqueue('c');
controller.close();
},