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How to use ReadableStreamDefaultReader method in wpt

Best JavaScript code snippet using wpt

default-reader.js

Source:default-reader.js

...8  // It's not exposed globally, but we test a few of its properties here.9  ReadableStreamDefaultReader = (new ReadableStream()).getReader().constructor;10}, 'Can get the ReadableStreamDefaultReader constructor indirectly');11test(() => {12  assert_throws(new TypeError(), () => new ReadableStreamDefaultReader('potato'));13  assert_throws(new TypeError(), () => new ReadableStreamDefaultReader({}));14  assert_throws(new TypeError(), () => new ReadableStreamDefaultReader());15}, 'ReadableStreamDefaultReader constructor should get a ReadableStream object as argument');16test(() => {17  const methods = ['cancel', 'constructor', 'read', 'releaseLock'];18  const properties = methods.concat(['closed']).sort();19  const rsReader = new ReadableStreamDefaultReader(new ReadableStream());20  const proto = Object.getPrototypeOf(rsReader);21  assert_array_equals(Object.getOwnPropertyNames(proto).sort(), properties);22  for (var m of methods) {23    const propDesc = Object.getOwnPropertyDescriptor(proto, m);24    assert_equals(propDesc.enumerable, false, 'method should be non-enumerable');25    assert_equals(propDesc.configurable, true, 'method should be configurable');26    assert_equals(propDesc.writable, true, 'method should be writable');27    assert_equals(typeof rsReader[m], 'function', 'should have be a method');28  }29  const closedPropDesc = Object.getOwnPropertyDescriptor(proto, 'closed');30  assert_equals(closedPropDesc.enumerable, false, 'closed should be non-enumerable');31  assert_equals(closedPropDesc.configurable, true, 'closed should be configurable');32  assert_not_equals(closedPropDesc.get, undefined, 'closed should have a getter');33  assert_equals(closedPropDesc.set, undefined, 'closed should not have a setter');34  assert_equals(rsReader.cancel.length, 1, 'cancel has 1 parameter');35  assert_not_equals(rsReader.closed, undefined, 'has a non-undefined closed property');36  assert_equals(typeof rsReader.closed.then, 'function', 'closed property is thenable');37  assert_equals(typeof rsReader.constructor, 'function', 'has a constructor method');38  assert_equals(rsReader.constructor.length, 1, 'constructor has 1 parameter');39  assert_equals(typeof rsReader.read, 'function', 'has a getReader method');40  assert_equals(rsReader.read.length, 0, 'read has no parameters');41  assert_equals(typeof rsReader.releaseLock, 'function', 'has a releaseLock method');42  assert_equals(rsReader.releaseLock.length, 0, 'releaseLock has no parameters');43}, 'ReadableStreamDefaultReader instances should have the correct list of properties');44test(() => {45  const rsReader = new ReadableStreamDefaultReader(new ReadableStream());46  assert_equals(rsReader.closed, rsReader.closed, 'closed should return the same promise');47}, 'ReadableStreamDefaultReader closed should always return the same promise object');48test(() => {49  const rs = new ReadableStream();50  new ReadableStreamDefaultReader(rs); // Constructing directly the first time should be fine.51  assert_throws(new TypeError(), () => new ReadableStreamDefaultReader(rs),52                'constructing directly the second time should fail');53}, 'Constructing a ReadableStreamDefaultReader directly should fail if the stream is already locked (via direct ' +54   'construction)');55test(() => {56  const rs = new ReadableStream();57  new ReadableStreamDefaultReader(rs); // Constructing directly should be fine.58  assert_throws(new TypeError(), () => rs.getReader(), 'getReader() should fail');59}, 'Getting a ReadableStreamDefaultReader via getReader should fail if the stream is already locked (via direct ' +60   'construction)');61test(() => {62  const rs = new ReadableStream();63  rs.getReader(); // getReader() should be fine.64  assert_throws(new TypeError(), () => new ReadableStreamDefaultReader(rs), 'constructing directly should fail');65}, 'Constructing a ReadableStreamDefaultReader directly should fail if the stream is already locked (via getReader)');66test(() => {67  const rs = new ReadableStream();68  rs.getReader(); // getReader() should be fine.69  assert_throws(new TypeError(), () => rs.getReader(), 'getReader() should fail');70}, 'Getting a ReadableStreamDefaultReader via getReader should fail if the stream is already locked (via getReader)');71test(() => {72  const rs = new ReadableStream({73    start(c) {74      c.close();75    }76  });77  new ReadableStreamDefaultReader(rs); // Constructing directly should not throw.78}, 'Constructing a ReadableStreamDefaultReader directly should be OK if the stream is closed');79test(() => {80  const theError = new Error('don\'t say i didn\'t warn ya');81  const rs = new ReadableStream({82    start(c) {83      c.error(theError);84    }85  });86  new ReadableStreamDefaultReader(rs); // Constructing directly should not throw.87}, 'Constructing a ReadableStreamDefaultReader directly should be OK if the stream is errored');88promise_test(() => {89  let controller;90  const rs = new ReadableStream({91    start(c) {92      controller = c;93    }94  });95  const reader = rs.getReader();96  const promise = reader.read().then(result => {97    assert_object_equals(result, { value: 'a', done: false }, 'read() should fulfill with the enqueued chunk');98  });99  controller.enqueue('a');100  return promise;...

brand-checks.js

Source:brand-checks.js

...19}, 'Can get the ReadableStreamController constructor indirectly');20function fakeReadableStream() {21  return {22    cancel() { return Promise.resolve(); },23    getReader() { return new ReadableStreamDefaultReader(new ReadableStream()); },24    pipeThrough(obj) { return obj.readable; },25    pipeTo() { return Promise.resolve(); },26    tee() { return [realReadableStream(), realReadableStream()]; }27  };28}29function realReadableStream() {30  return new ReadableStream();31}32function fakeReadableStreamDefaultReader() {33  return {34    get closed() { return Promise.resolve(); },35    cancel() { return Promise.resolve(); },36    read() { return Promise.resolve({ value: undefined, done: true }); },37    releaseLock() { return; }38  };39}40function fakeReadableStreamController() {41  return {42    close() { },43    enqueue() { },44    error() { }45  };46}47promise_test(t => {48  return methodRejects(t, ReadableStream.prototype, 'cancel', fakeReadableStream());49}, 'ReadableStream.prototype.cancel enforces a brand check');50test(() => {51  methodThrows(ReadableStream.prototype, 'getReader', fakeReadableStream());52}, 'ReadableStream.prototype.getReader enforces a brand check');53test(() => {54  methodThrows(ReadableStream.prototype, 'tee', fakeReadableStream());55}, 'ReadableStream.prototype.tee enforces a brand check');56test(() => {57  assert_throws(new TypeError(), () => new ReadableStreamDefaultReader(fakeReadableStream()),58                'Constructing a ReadableStreamDefaultReader should throw');59}, 'ReadableStreamDefaultReader enforces a brand check on its argument');60promise_test(t => {61  return Promise.all([62    getterRejects(t, ReadableStreamDefaultReader.prototype, 'closed', fakeReadableStreamDefaultReader()),63    getterRejects(t, ReadableStreamDefaultReader.prototype, 'closed', realReadableStream())64  ]);65}, 'ReadableStreamDefaultReader.prototype.closed enforces a brand check');66promise_test(t => {67  return Promise.all([68    methodRejects(t, ReadableStreamDefaultReader.prototype, 'cancel', fakeReadableStreamDefaultReader()),69    methodRejects(t, ReadableStreamDefaultReader.prototype, 'cancel', realReadableStream())70  ]);71}, 'ReadableStreamDefaultReader.prototype.cancel enforces a brand check');72promise_test(t => {73  return Promise.all([74    methodRejects(t, ReadableStreamDefaultReader.prototype, 'read', fakeReadableStreamDefaultReader()),75    methodRejects(t, ReadableStreamDefaultReader.prototype, 'read', realReadableStream())76  ]);77}, 'ReadableStreamDefaultReader.prototype.read enforces a brand check');78test(() => {79  methodThrows(ReadableStreamDefaultReader.prototype, 'releaseLock', fakeReadableStreamDefaultReader());80  methodThrows(ReadableStreamDefaultReader.prototype, 'releaseLock', realReadableStream());81}, 'ReadableStreamDefaultReader.prototype.releaseLock enforces a brand check');82test(() => {83  assert_throws(new TypeError(), () => new ReadableStreamController(fakeReadableStream()),84                'Constructing a ReadableStreamController should throw');85}, 'ReadableStreamController enforces a brand check on its argument');86test(() => {87  assert_throws(new TypeError(), () => new ReadableStreamController(realReadableStream()),88                'Constructing a ReadableStreamController should throw');89}, 'ReadableStreamController can\'t be given a fully-constructed ReadableStream');90test(() => {91  methodThrows(ReadableStreamController.prototype, 'close', fakeReadableStreamController());92}, 'ReadableStreamController.prototype.close enforces a brand check');93test(() => {...

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue("a");4    controller.enqueue("b");5    controller.enqueue("c");6  }7});8var reader = rs.getReader();9var read = reader.read();10read.then(result => {

Using AI Code Generation

1const { ReadableStream, ReadableStreamDefaultReader } = require('stream/web');2const rs = new ReadableStream({3  start(controller) {4    const reader = new ReadableStreamDefaultReader(rs);5    const read = reader.read();6    const releaseLock = reader.releaseLock();7  },8});9const {10} = require('stream/web');11const {12} = primordials;13const {14  codes: {15  },16} = require('internal/errors');17const {18} = require('internal/util');19const {20} = require('internal/validators');21const {22} = require('internal/abort_controller');23const {24} = require('internal/worker/io');25const {26} = require('internal/streams/destroyed');27const {28} = require('internal/streams/readable-utils');29const {30} = require('internal/streams/writable');31const {32} = require('buffer');33const finished = require('internal/streams/end-of-stream');34const { inspect } = require('internal/util/inspect');35const { validateArrayBufferView } = require('internal/validation');36const { MathFloor, MathMin } = Math;37const { AsyncWrap } = internalBinding('async_wrap');38const { emitDestroy } = require('internal/streams/destroy');39emitExperimentalWarning('stream/web');40const kAbort = Symbol('kAbort');41const kCancel = Symbol('kCancel');42const kCloseSentinel = Symbol('kCloseSentinel');43const kChunk = Symbol('kChunk');44const kErrorSentinel = Symbol('kErrorSentinel');45const kPullSentinel = Symbol('kPullSentinel');46const kStateClosed = Symbol('kStateClosed');

Using AI Code Generation

1const rs = new ReadableStream();2const reader = rs.getReader();3reader.read().then(({ value, done }) => {4  console.log(value);5  console.log(done);6});7const { Readable } = require('stream');8const rs = new Readable();9const reader = rs.getReader();10reader.read().then(({ value, done }) => {11  console.log(value);12  console.log(done);13});14const rs = new ReadableStream();15const reader = rs.getReader();16reader.releaseLock();17reader.read().then(({ value, done }) => {18  console.log(value);19  console.log(done);20});21const { Readable } = require('stream');22const rs = new Readable();23const reader = rs.getReader();24reader.releaseLock();25reader.read().then(({ value, done }) => {26  console.log(value);27  console.log(done);28});29const rs = new ReadableStream();30const reader = rs.getReader();31reader.releaseLock();32reader.releaseLock();33reader.read().then(({ value, done }) => {34  console.log(value);35  console.log(done);36});37const { Readable } = require('stream');38const rs = new Readable();39const reader = rs.getReader();40reader.releaseLock();41reader.releaseLock();42reader.read().then(({ value, done }) => {43  console.log(value);44  console.log(done);45});46const rs = new ReadableStream();47const reader = rs.getReader();48reader.releaseLock();49reader.releaseLock();50reader.releaseLock();51reader.read().then(({ value, done }) => {52  console.log(value);53  console.log(done);54});

Using AI Code Generation

1const { ReadableStream, ReadableStreamDefaultReader } = require('stream/web');2const { createReadStream } = require('fs');3const rs = createReadStream('test.js');4const reader = new ReadableStreamDefaultReader(rs);5reader.read().then(console.log);6const { ReadableStream, ReadableStreamDefaultReader } = require('stream/web');7const { createReadStream } = require('fs');8const rs = createReadStream('test.js');9const reader = rs.getReader();10reader.read().then(console.log);11const { ReadableStream, ReadableStreamDefaultReader } = require('stream/web');12const { createReadStream } = require('fs');13const rs = createReadStream('test.js');14const reader = new ReadableStreamDefaultReader(rs);15reader.read().then(console.log);16const { ReadableStream, ReadableStreamDefaultReader } = require('stream/web');17const { createReadStream } = require('fs');18const rs = createReadStream('test.js');19const reader = rs.getReader();20reader.read().then(console.log);21{ value: <Buffer 2f/2f 20 50 61 74 68 3a 20 74 65 73 74 2e 6a 73 0a 2f 2f 63 6f 64 65 20 74 6f 20 75 73 65 20 52 65 61 64 61 62 6c 65 53 74 72 65 61 6d 44 65 66 61 75 6c 74 52 65 61 64 65 72 20 6d 65 74 68 6f 64 20 6f 66 20 77 70 74 0a 63 6f 6e 73 74 20 7b 20 52 65 61 64 61 62 6c 65 53 74 72 65 61 6d 2c 20

Using AI Code Generation

1import { ReadableStreamDefaultReader } from 'streams';2const reader = new ReadableStreamDefaultReader(stream);3import { ReadableStreamDefaultReader } from 'streams';4const reader = new ReadableStreamDefaultReader(stream);5import { ReadableStreamDefaultReader } from 'streams';6const reader = new ReadableStreamDefaultReader(stream);7import { ReadableStreamDefaultReader } from 'streams';8const reader = new ReadableStreamDefaultReader(stream);9import { ReadableStreamDefaultReader } from 'streams';10const reader = new ReadableStreamDefaultReader(stream);11import { ReadableStreamDefaultReader } from 'streams';12const reader = new ReadableStreamDefaultReader(stream);13import { ReadableStreamDefaultReader } from 'streams';14const reader = new ReadableStreamDefaultReader(stream);15import { ReadableStreamDefaultReader } from 'streams';16const reader = new ReadableStreamDefaultReader(stream);17import { ReadableStreamDefaultReader } from 'streams';18const reader = new ReadableStreamDefaultReader(stream);19import { ReadableStreamDefaultReader } from 'streams';20const reader = new ReadableStreamDefaultReader(stream);21import { ReadableStreamDefaultReader } from 'streams';22const reader = new ReadableStreamDefaultReader(stream);23import { ReadableStreamDefaultReader } from 'streams';24const reader = new ReadableStreamDefaultReader(stream);

Using AI Code Generation

1import { ReadableStreamDefaultReader } from 'web-streams-polyfill/ponyfill';2const reader = new ReadableStreamDefaultReader(stream);3reader.read().then(({ value, done }) => {4  if (done) {5    console.log('The stream was already closed.');6  } else {7    console.log(value);8  }9});10import { ReadableStreamDefaultReader } from 'web-streams-polyfill/ponyfill';11const reader = new ReadableStreamDefaultReader(stream);12reader.read().then(({ value, done }) => {13  if (done) {14    console.log('The stream was already closed.');15  } else {16    console.log(value);17  }18});19import { ReadableStreamDefaultReader } from 'web-streams-polyfill/ponyfill';20const reader = new ReadableStreamDefaultReader(stream);21reader.read().then(({ value, done }) => {22  if (done) {23    console.log('The stream was already closed.');24  } else {25    console.log(value);26  }27});

Using AI Code Generation

1const reader = response.body.getReader();2const result = await reader.read();3console.log(result);4const reader = response.body.getReader();5const result = await reader.read();6console.log(result);7const reader = response.body.getReader();8const result = await reader.read();9console.log(result);10const reader = response.body.getReader();11const result = await reader.read();12console.log(result);13const reader = response.body.getReader();14const result = await reader.read();15console.log(result);16const reader = response.body.getReader();17const result = await reader.read();18console.log(result);19const reader = response.body.getReader();20const result = await reader.read();21console.log(result);22const reader = response.body.getReader();23const result = await reader.read();24console.log(result

Using AI Code Generation

1var reader = stream.getReader();2var readPromise = reader.read();3var closedPromise = reader.closed;4var cancelPromise = reader.cancel('reason');5var releaseLockPromise = reader.releaseLock();6var reader = stream.getReader({ mode: 'byob' });7var readPromise = reader.read(new Uint8Array(32));8var closedPromise = reader.closed;9var cancelPromise = reader.cancel('reason');10var releaseLockPromise = reader.releaseLock();11var controller = stream.getReader().read().controller;12var enqueuePromise = controller.enqueue('chunk');13var closePromise = controller.close();14var errorPromise = controller.error('e');15var request = stream.getReader({ mode: 'byob' }).read(new Uint8Array(32)).request;16var respondPromise = request.respond(32);17var respondWithNewViewPromise = request.respondWithNewView(new Uint8Array(32));18var writer = stream.getWriter();19var writePromise = writer.write('chunk');20var closePromise = writer.close();21var abortPromise = writer.abort('reason');22var releaseLockPromise = writer.releaseLock();

Using AI Code Generation

1var stream = new ReadableStream({2  start(controller) {3    function push() {4      var result = reader.read();5      if (result.done) {6        return;7      }8      controller.enqueue(result.value);9      setTimeout(push, 1000);10    };11    push();12  }13});14var writer = stream.getWriter();15writer.write(1);16writer.write(2);17writer.write(3);18writer.write(4);19writer.write(5);20writer.write(6);21writer.write(7);22writer.write(8);23writer.write(9);24writer.write(10);25writer.write(11);26writer.write(12);27writer.write(13);28writer.write(14);29writer.write(15);30writer.write(16);31writer.write(17);32writer.write(18);33writer.write(19);34writer.write(20);35writer.write(21);36writer.write(22);37writer.write(23);38writer.write(24);39writer.write(25);40writer.write(26);41writer.write(27);42writer.write(28);43writer.write(29);44writer.write(30);45writer.write(31);46writer.write(32);47writer.write(33);48writer.write(34);49writer.write(35);50writer.write(36);51writer.write(37);52writer.write(38);53writer.write(39);54writer.write(40);55writer.write(41);56writer.write(42);57writer.write(43);

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