How to use ReadableByteStreamControllerRespondInternal method in wpt

Best JavaScript code snippet using wpt

ReadableByteStreamInternals.js

Source:ReadableByteStreamInternals.js

1/*2 * Copyright (C) 2016 Canon Inc. All rights reserved.3 *4 * Redistribution and use in source and binary forms, with or without5 * modification, are permitted provided that the following conditions6 * are met:7 * 1. Redistributions of source code must retain the above copyright8 *    notice, this list of conditions and the following disclaimer.9 * 2. Redistributions in binary form must reproduce the above copyright10 *    notice, this list of conditions and the following disclaimer in the11 *    documentation and/or other materials provided with the distribution.12 *13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.24 */25// @conditional=ENABLE(STREAMS_API)26// @internal27function privateInitializeReadableByteStreamController(stream, underlyingByteSource, highWaterMark)28{29    "use strict";30    if (!@isReadableStream(stream))31        @throwTypeError("ReadableByteStreamController needs a ReadableStream");32    // readableStreamController is initialized with null value.33    if (stream.@readableStreamController !== null)34        @throwTypeError("ReadableStream already has a controller");35    this.@controlledReadableStream = stream;36    this.@underlyingByteSource = underlyingByteSource;37    this.@pullAgain = false;38    this.@pulling = false;39    @readableByteStreamControllerClearPendingPullIntos(this);40    this.@queue = [];41    this.@totalQueuedBytes = 0;42    this.@started = false;43    this.@closeRequested = false;44    let hwm = @Number(highWaterMark);45    if (@isNaN(hwm) || hwm < 0)46        @throwRangeError("highWaterMark value is negative or not a number");47    this.@strategyHWM = hwm;48    let autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;49    if (autoAllocateChunkSize !== @undefined) {50        autoAllocateChunkSize = @Number(autoAllocateChunkSize);51        if (autoAllocateChunkSize <= 0 || autoAllocateChunkSize === @Number.POSITIVE_INFINITY || autoAllocateChunkSize === @Number.NEGATIVE_INFINITY)52            @throwRangeError("autoAllocateChunkSize value is negative or equal to positive or negative infinity");53    }54    this.@autoAllocateChunkSize = autoAllocateChunkSize;55    this.@pendingPullIntos = [];56    const controller = this;57    const startResult = @promiseInvokeOrNoopNoCatch(underlyingByteSource, "start", [this]).@then(() => {58        controller.@started = true;59        @assert(!controller.@pulling);60        @assert(!controller.@pullAgain);61        @readableByteStreamControllerCallPullIfNeeded(controller);62    }, (error) => {63        if (stream.@state === @streamReadable)64            @readableByteStreamControllerError(controller, error);65    });66    this.@cancel = @readableByteStreamControllerCancel;67    this.@pull = @readableByteStreamControllerPull;68    return this;69}70function privateInitializeReadableStreamBYOBRequest(controller, view)71{72    "use strict";73    this.@associatedReadableByteStreamController = controller;74    this.@view = view;75}76function isReadableByteStreamController(controller)77{78    "use strict";79    // Same test mechanism as in isReadableStreamDefaultController (ReadableStreamInternals.js).80    // See corresponding function for explanations.81    return @isObject(controller) && !!controller.@underlyingByteSource;82}83function isReadableStreamBYOBRequest(byobRequest)84{85    "use strict";86    // Same test mechanism as in isReadableStreamDefaultController (ReadableStreamInternals.js).87    // See corresponding function for explanations.88    return @isObject(byobRequest) && !!byobRequest.@associatedReadableByteStreamController;89}90function isReadableStreamBYOBReader(reader)91{92    "use strict";93    // FIXME: Since BYOBReader is not yet implemented, always return false.94    // To be implemented at the same time as BYOBReader (see isReadableStreamDefaultReader95    // to apply same model).96    return false;97}98function readableByteStreamControllerCancel(controller, reason)99{100    "use strict";101    if (controller.@pendingPullIntos.length > 0)102        controller.@pendingPullIntos[0].bytesFilled = 0;103    controller.@queue = [];104    controller.@totalQueuedBytes = 0;105    return @promiseInvokeOrNoop(controller.@underlyingByteSource, "cancel", [reason]);106}107function readableByteStreamControllerError(controller, e)108{109    "use strict";110    @assert(controller.@controlledReadableStream.@state === @streamReadable);111    @readableByteStreamControllerClearPendingPullIntos(controller);112    controller.@queue = [];113    @readableStreamError(controller.@controlledReadableStream, e);114}115function readableByteStreamControllerClose(controller)116{117    "use strict";118    @assert(!controller.@closeRequested);119    @assert(controller.@controlledReadableStream.@state === @streamReadable);120    if (controller.@totalQueuedBytes > 0) {121        controller.@closeRequested = true;122        return;123    }124    if (controller.@pendingPullIntos.length > 0) {125        if (controller.@pendingPullIntos[0].bytesFilled > 0) {126            const e = new @TypeError("Close requested while there remain pending bytes");127            @readableByteStreamControllerError(controller, e);128            throw e;129        }130    }131    @readableStreamClose(controller.@controlledReadableStream);132}133function readableByteStreamControllerClearPendingPullIntos(controller)134{135    "use strict";136    // FIXME: To be implemented in conjunction with ReadableStreamBYOBRequest.137}138function readableByteStreamControllerGetDesiredSize(controller)139{140   "use strict";141   return controller.@strategyHWM - controller.@totalQueuedBytes;142}143function readableStreamHasBYOBReader(stream)144{145    "use strict";146    return stream.@reader !== @undefined && @isReadableStreamBYOBReader(stream.@reader);147}148function readableStreamHasDefaultReader(stream)149{150    "use strict";151    return stream.@reader !== @undefined && @isReadableStreamDefaultReader(stream.@reader);152}153function readableByteStreamControllerHandleQueueDrain(controller) {154    "use strict";155    @assert(controller.@controlledReadableStream.@state === @streamReadable);156    if (!controller.@totalQueuedBytes && controller.@closeRequested)157        @readableStreamClose(controller.@controlledReadableStream);158    else159        @readableByteStreamControllerCallPullIfNeeded(controller);160}161function readableByteStreamControllerPull(controller)162{163    "use strict";164    const stream = controller.@controlledReadableStream;165    @assert(@readableStreamHasDefaultReader(stream));166    if (controller.@totalQueuedBytes > 0) {167        @assert(stream.@reader.@readRequests.length === 0);168        const entry = controller.@queue.@shift();169        controller.@totalQueuedBytes -= entry.byteLength;170        @readableByteStreamControllerHandleQueueDrain(controller);171        let view;172        try {173            view = new @Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);174        } catch (error) {175            return @Promise.@reject(error);176        }177        return @Promise.@resolve({value: view, done: false});178    }179    if (controller.@autoAllocateChunkSize !== @undefined) {180        let buffer;181        try {182            buffer = new @ArrayBuffer(controller.@autoAllocateChunkSize);183        } catch (error) {184            return @Promise.@reject(error);185        }186        const pullIntoDescriptor = {187            buffer,188            byteOffset: 0,189            byteLength: controller.@autoAllocateChunkSize,190            bytesFilled: 0,191            elementSize: 1,192            ctor: @Uint8Array,193            readerType: 'default'194        };195        controller.@pendingPullIntos.@push(pullIntoDescriptor);196    }197    const promise = @readableStreamAddReadRequest(stream);198    @readableByteStreamControllerCallPullIfNeeded(controller);199    return promise;200}201function readableByteStreamControllerShouldCallPull(controller)202{203    "use strict";204    const stream = controller.@controlledReadableStream;205    if (stream.@state !== @streamReadable)206        return false;207    if (controller.@closeRequested)208        return false;209    if (!controller.@started)210        return false;211    if (@readableStreamHasDefaultReader(stream) && stream.@reader.@readRequests.length > 0)212        return true;213    if (@readableStreamHasBYOBReader(stream) && stream.@reader.@readIntoRequests.length > 0)214        return true;215    if (@readableByteStreamControllerGetDesiredSize(controller) > 0)216        return true;217    return false;218}219function readableByteStreamControllerCallPullIfNeeded(controller)220{221    "use strict";222    if (!@readableByteStreamControllerShouldCallPull(controller))223        return;224    if (controller.@pulling) {225        controller.@pullAgain = true;226        return;227    }228    @assert(!controller.@pullAgain);229    controller.@pulling = true;230    @promiseInvokeOrNoop(controller.@underlyingByteSource, "pull", [controller]).@then(() => {231        controller.@pulling = false;232        if (controller.@pullAgain) {233            controller.@pullAgain = false;234            @readableByteStreamControllerCallPullIfNeeded(controller);235        }236    }, (error) => {237        if (controller.@controlledReadableStream.@state === @streamReadable)238            @readableByteStreamControllerError(controller, error);239    });240}241function transferBufferToCurrentRealm(buffer)242{243    "use strict";244    // FIXME: Determine what should be done here exactly (what is already existing in current245    // codebase and what has to be added). According to spec, Transfer operation should be246    // performed in order to transfer buffer to current realm. For the moment, simply return247    // received buffer.248    return buffer;249}250function readableByteStreamControllerEnqueue(controller, chunk)251{252    "use strict";253    const stream = controller.@controlledReadableStream;254    @assert(!controller.@closeRequested);255    @assert(stream.@state === @streamReadable);256    const buffer = chunk.buffer;257    const byteOffset = chunk.byteOffset;258    const byteLength = chunk.byteLength;259    const transferredBuffer = @transferBufferToCurrentRealm(buffer);260    if (@readableStreamHasDefaultReader(stream)) {261        if (!stream.@reader.@readRequests.length)262            @readableByteStreamControllerEnqueueChunk(controller, transferredBuffer, byteOffset, byteLength);263        else {264            @assert(!controller.@queue.length);265            let transferredView = new @Uint8Array(transferredBuffer, byteOffset, byteLength);266            @readableStreamFulfillReadRequest(stream, transferredView, false);267        }268        return;269    }270    if (@readableStreamHasBYOBReader(stream)) {271        // FIXME: To be implemented once ReadableStreamBYOBReader has been implemented (for the moment,272        // test cannot be true).273        @throwTypeError("ReadableByteStreamController enqueue operation has no support for BYOB reader");274        return;275    }276    @assert(!@isReadableStreamLocked(stream));277    @readableByteStreamControllerEnqueueChunk(controller, transferredBuffer, byteOffset, byteLength);278}279// Spec name: readableByteStreamControllerEnqueueChunkToQueue.280function readableByteStreamControllerEnqueueChunk(controller, buffer, byteOffset, byteLength)281{282    "use strict";283    controller.@queue.@push({284        buffer: buffer,285        byteOffset: byteOffset,286        byteLength: byteLength287    });288    controller.@totalQueuedBytes += byteLength;289}290function readableByteStreamControllerRespondWithNewView(controller, view)291{292    "use strict";293    @assert(controller.@pendingPullIntos.length > 0);294    let firstDescriptor = controller.@pendingPullIntos[0];295    if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset)296        @throwRangeError("Invalid value for view.byteOffset");297    if (firstDescriptor.byteLength !== view.byteLength)298        @throwRangeError("Invalid value for view.byteLength");299    firstDescriptor.buffer = view.buffer;300    @readableByteStreamControllerRespondInternal(controller, view.byteLength);301}302function readableByteStreamControllerRespond(controller, bytesWritten)303{304    "use strict";305    bytesWritten = @Number(bytesWritten);306    if (@isNaN(bytesWritten) || bytesWritten === @Number.POSITIVE_INFINITY || bytesWritten < 0 )307        @throwRangeError("bytesWritten has an incorrect value");308    @assert(controller.@pendingPullIntos.length > 0);309    @readableByteStreamControllerRespondInternal(controller, bytesWritten);310}311function readableByteStreamControllerRespondInternal(controller, bytesWritten)312{313    "use strict";314    let firstDescriptor = controller.@pendingPullIntos[0];315    let stream = controller.@controlledReadableStream;316    if (stream.@state === @streamClosed) {317        if (bytesWritten !== 0)318            @throwTypeError("bytesWritten is different from 0 even though stream is closed");319        @readableByteStreamControllerRespondInClosedState(controller, firstDescriptor);320    } else {321        @assert(stream.@state === @streamReadable);322        @readableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);323    }324}325function readableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor)326{327    "use strict";328    if (pullIntoDescriptor.bytesFilled + bytesWritten > pullIntoDescriptor.byteLength)329        @throwRangeError("bytesWritten value is too great");330    @assert(controller.@pendingPullIntos.length === 0 || controller.@pendingPullIntos[0] === pullIntoDescriptor);331    @readableByteStreamControllerInvalidateBYOBRequest(controller);332    pullIntoDescriptor.bytesFilled += bytesWritten;333    if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize)334        return;335    @readableByteStreamControllerShiftPendingDescriptor(controller);336    const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;337    if (remainderSize > 0) {338        const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;339        const remainder = @cloneArrayBuffer(pullIntoDescriptor.buffer, end - remainderSize, remainderSize);340        @readableByteStreamControllerEnqueueChunk(controller, remainder, 0, remainder.byteLength);341    }342    pullIntoDescriptor.buffer = @transferBufferToCurrentRealm(pullIntoDescriptor.buffer);343    pullIntoDescriptor.bytesFilled -= remainderSize;344    @readableByteStreamControllerCommitDescriptor(controller.@controlledReadableStream, pullIntoDescriptor);345    @readableByteStreamControllerProcessPullDescriptors(controller);346}347function readableByteStreamControllerRespondInClosedState(controller, firstDescriptor)348{349    "use strict";350    firstDescriptor.buffer = @transferBufferToCurrentRealm(firstDescriptor.buffer);351    @assert(firstDescriptor.bytesFilled === 0);352    // FIXME: Spec does not describe below test. However, only ReadableStreamBYOBReader has a readIntoRequests353    // property. This issue has been reported through WHATWG/streams GitHub354    // (https://github.com/whatwg/streams/issues/686), but no solution has been provided for the moment.355    // Therefore, below test is added as a temporary fix.356    if (!@isReadableStreamBYOBReader(controller.@reader))357        return;358    while (controller.@reader.@readIntoRequests.length > 0) {359        let pullIntoDescriptor = @readableByteStreamControllerShiftPendingDescriptor(controller);360        @readableByteStreamControllerCommitDescriptor(controller.@controlledReadableStream, pullIntoDescriptor);361    }362}363// Spec name: readableByteStreamControllerProcessPullIntoDescriptorsUsingQueue (shortened for readability).364function readableByteStreamControllerProcessPullDescriptors(controller)365{366    "use strict";367    @assert(!controller.@closeRequested);368    while (controller.@pendingPullIntos.length > 0) {369        if (controller.@totalQueuedBytes === 0)370            return;371        let pullIntoDescriptor = controller.@pendingPullIntos[0];372        if (@readableByteStreamControllerFillDescriptorFromQueue(controller, pullIntoDescriptor)) {373            @readableByteStreamControllerShiftPendingDescriptor(controller);374            @readableByteStreamControllerCommitDescriptor(controller.@controlledReadableStream, pullIntoDescriptor);375        }376    }377}378// Spec name: readableByteStreamControllerFillPullIntoDescriptorFromQueue (shortened for readability).379function readableByteStreamControllerFillDescriptorFromQueue(controller, pullIntoDescriptor)380{381    "use strict";382    const currentAlignedBytes = pullIntoDescriptor.bytesFilled - (pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize);383    const maxBytesToCopy = controller.@totalQueuedBytes < pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled ?384                controller.@totalQueuedBytes : pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled;385    const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;386    const maxAlignedBytes = maxBytesFilled - (maxBytesFilled % pullIntoDescriptor.elementSize);387    let totalBytesToCopyRemaining = maxBytesToCopy;388    let ready = false;389    if (maxAlignedBytes > currentAlignedBytes) {390        totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;391        ready = true;392    }393    while (totalBytesToCopyRemaining > 0) {394        let headOfQueue = controller.@queue[0];395        const bytesToCopy = totalBytesToCopyRemaining < headOfQueue.byteLength ? totalBytesToCopyRemaining : headOfQueue.byteLength;396        // Copy appropriate part of pullIntoDescriptor.buffer to headOfQueue.buffer.397        // Remark: this implementation is not completely aligned on the definition of CopyDataBlockBytes398        // operation of ECMAScript (the case of Shared Data Block is not considered here, but it doesn't seem to be an issue).399        let fromIndex = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;400        let count = bytesToCopy;401        let toIndex = headOfQueue.byteOffset;402        while (count > 0) {403            headOfQueue.buffer[toIndex] = pullIntoDescriptor.buffer[fromIndex];404            toIndex++;405            fromIndex++;406            count--;407        }408        if (headOfQueue.byteLength === bytesToCopy)409            controller.@queue.@shift();410        else {411            headOfQueue.byteOffset += bytesToCopy;412            headOfQueue.byteLength -= bytesToCopy;413        }414        controller.@totalQueuedBytes -= bytesToCopy;415        @assert(controller.@pendingPullIntos.length === 0 || controller.@pendingPullIntos[0] === pullIntoDescriptor);416        @readableByteStreamControllerInvalidateBYOBRequest(controller);417        pullIntoDescriptor.bytesFilled += bytesToCopy;418        totalBytesToCopyRemaining -= bytesToCopy;419    }420    if (!ready) {421        @assert(controller.@totalQueuedBytes === 0);422        @assert(pullIntoDescriptor.bytesFilled > 0);423        @assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize);424    }425    return ready;426}427// Spec name: readableByteStreamControllerShiftPendingPullInto (renamed for consistency).428function readableByteStreamControllerShiftPendingDescriptor(controller)429{430    "use strict";431    let descriptor = controller.@pendingPullIntos.@shift();432    @readableByteStreamControllerInvalidateBYOBRequest(controller);433    return descriptor;434}435function readableByteStreamControllerInvalidateBYOBRequest(controller)436{437    "use strict";438    if (controller.@byobRequest === @undefined)439        return;440    controller.@byobRequest.@associatedReadableByteStreamController = @undefined;441    controller.@byobRequest.@view = @undefined;442    controller.@byobRequest = @undefined;443}444// Spec name: readableByteStreamControllerCommitPullIntoDescriptor (shortened for readability).445function readableByteStreamControllerCommitDescriptor(stream, pullIntoDescriptor)446{447    "use strict";448    @assert(stream.@state !== @streamErrored);449    let done = false;450    if (stream.@state === @streamClosed) {451        @assert(!pullIntoDescriptor.bytesFilled);452        done = true;453    }454    let filledView = @readableByteStreamControllerConvertDescriptor(pullIntoDescriptor);455    if (pullIntoDescriptor.readerType === "default")456        @readableStreamFulfillReadRequest(stream, filledView, done);457    else {458        @assert(pullIntoDescriptor.readerType === "byob");459        @readableStreamFulfillReadIntoRequest(stream, filledView, done);460    }461}462// Spec name: readableByteStreamControllerConvertPullIntoDescriptor (shortened for readability).463function readableByteStreamControllerConvertDescriptor(pullIntoDescriptor)464{465    "use strict";466    @assert(pullIntoDescriptor.bytesFilled <= pullIntoDescriptor.byteLength);467    @assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);468    return new pullIntoDescriptor.ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, pullIntoDescriptor.bytesFilled / pullIntoDescriptor.elementSize);469}470function readableStreamFulfillReadIntoRequest(stream, chunk, done)471{472    "use strict";473    stream.@reader.@readIntoRequests.@shift().@resolve.@call(@undefined, {value: chunk, done: done});...

Using AI Code Generation

1var rs = new ReadableStream({2    start(controller) {3        controller.enqueue(new Uint8Array([1, 2, 3, 4, 5]));4        controller.close();5    }6});7var reader = rs.getReader();8reader.read().then(function(result) {9    console.log(result.value);10    console.log(result.done);11});12var rs = new ReadableStream({13    start(controller) {14        controller.enqueue(new Uint8Array([1, 2, 3, 4, 5]));15        controller.close();16    }17});18var reader = rs.getReader();19reader.read().then(function(result) {20    console.log(result.value);21    console.log(result.done);22});23var rs = new ReadableStream({24    start(controller) {25        controller.enqueue(new Uint8Array([1, 2, 3, 4, 5]));26        controller.close();27    }28});29var reader = rs.getReader();30reader.read().then(function(result) {31    console.log(result.value);32    console.log(result.done);33});34var rs = new ReadableStream({35    start(controller) {36        controller.enqueue(new Uint8Array([1, 2, 3, 4, 5]));37        controller.close();38    }39});40var reader = rs.getReader();41reader.read().then(function(result) {42    console.log(result.value);43    console.log(result.done);44});45var rs = new ReadableStream({46    start(controller) {47        controller.enqueue(new Uint8Array([1, 2, 3, 4, 5]));48        controller.close();49    }50});51var reader = rs.getReader({ mode: 'byob' });52var view = new Uint8Array(1);53reader.read(view).then(function(result) {54    console.log(result.value);55    console.log(result.done);56});

Using AI Code Generation

1var rs = new ReadableStream({2  pull: function(c) {3    c.enqueue('a');4    c.enqueue('b');5    c.enqueue('c');6  }7});8rs.getReader().read().then(function(result) {9  assert_equals(result.value, 'a');10  assert_false(result.done);11  return rs.getReader().read();12}).then(function(result) {13  assert_equals(result.value, 'b');14  assert_false(result.done);15  return rs.getReader().read();16}).then(function(result) {17  assert_equals(result.value, 'c');18  assert_false(result.done);19  return rs.getReader().read();20}).then(function(result) {21  assert_equals(result.value, undefined);22  assert_true(result.done);23}).catch(unreached_rejection(t));24var rs = new ReadableStream({25  pull: function(c) {26    var buffer = new Uint8Array(3);27    buffer[0] = 0x61;28    buffer[1] = 0x62;29    buffer[2] = 0x63;30    c.enqueue(buffer);31  }32});33rs.getReader().read().then(function(result) {34  assert_equals(result.value[0], 0x61);35  assert_equals(result.value[1], 0x62);36  assert_equals(result.value[2], 0x63);37  assert_false(result.done);38  return rs.getReader().read();39}).then(function(result) {40  assert_equals(result.value, undefined);41  assert_true(result.done);42}).catch(unreached_rejection(t));43var rs = new ReadableStream({44  pull: function(c) {45    var buffer = new Uint8Array(3);46    buffer[0] = 0x61;47    buffer[1] = 0x62;48    buffer[2] = 0x63;49    c.enqueue(buffer);50    c.close();51  }52});53rs.getReader().read().then(function(result) {54  assert_equals(result.value[0], 0x61);55  assert_equals(result.value[1], 0x62);56  assert_equals(result.value[2], 0x63);57  assert_false(result.done);58  return rs.getReader().read();59}).then

Using AI Code Generation

1const rs = new ReadableStream({2  start(controller) {3    controller.enqueue('a');4    controller.enqueue('b');5    controller.enqueue('c');6  }7});8const reader = rs.getReader();9const read = async () => {10  const result = await reader.read();11  if (!result.done) {12    console.log(result.value);13    await new Promise(resolve => setTimeout(resolve, 1000));14    read();15  }16};17read();18const rs = new ReadableStream({19  pull(controller) {20    controller.enqueue(new Uint8Array([0, 1, 2]).buffer);21    controller.close();22  }23});24const reader = rs.getReader();25const read = async () => {26  const result = await reader.read();27  if (!result.done) {28    console.log(result.value);29    await new Promise(resolve => setTimeout(resolve, 1000));30    read();31  }32};33read();34const rs = new ReadableStream({35  pull(controller) {36    controller.enqueue(new Uint8Array([0, 1, 2]).buffer);37    controller.close();38  }39});40const reader = rs.getReader();41const read = async () => {42  const result = await reader.read();43  if (!result.done) {44    console.log(result.value);45    await new Promise(resolve => setTimeout(resolve, 1000));46    read();47  }48};49read();50const rs = new ReadableStream({51  pull(controller) {52    controller.error();53  }54});55const reader = rs.getReader();56const read = async () => {57  const result = await reader.read();58  if (!result.done) {59    console.log(result.value);60    await new Promise(resolve => setTimeout(resolve, 1000));61    read();62  }63};64read();65const rs = new ReadableStream({66  pull(controller) {67    controller.enqueue(new Uint8Array([0, 1, 2]).buffer);68    controller.close();69  }70});71const reader = rs.getReader({ mode

Using AI Code Generation

1var assert = require('assert');2var BYOBRequest = require('../byob-request.js');3var ReadableByteStreamController = require('../readable-byte-stream-controller.js');4var ReadableStream = require('../readable-stream.js');5var ReadableStreamBYOBRequest = require('../readable-stream-byob-request.js');6var ReadableStreamDefaultController = require('../readable-stream-default-controller.js');7var ReadableStreamDefaultReader = require('../readable-stream-default-reader.js');8var ReadableStreamBYOBReader = require('../readable-stream-byob-reader.js');9var ReadableStreamTee = require('../readable-stream-tee.js');10var ReadableStreamDefaultControllerClose = require('../readable-stream-default-controller-close.js');11var ReadableStreamDefaultControllerEnqueue = require('../readable-stream-default-controller-enqueue

Using AI Code Generation

1var rs = new ReadableStream({2    start: function (c) {3        var controller = c;4        controller.enqueue(new Uint8Array([0x01, 0x02, 0x03]));5        controller.close();6    }7});8var reader = rs.getReader();9var readPromise = reader.read();10readPromise.then(function (result) {11    assert_true(result.done, 'done');12    assert_array_equals(new Uint8Array(result.value), new Uint8Array([0x01, 0x02, 0x03]), 'value');13    test.done();14});15Error: Assertion failed: The stream (in state readable) is not in the readable state and cannot be closed

Using AI Code Generation

1test(() => {2  const rs = new ReadableStream({3    pull(controller) {4      controller.enqueue([0x00, 0x01, 0x02]);5      controller.close();6    }7  });8  const reader = rs.getReader();9  return reader.read().then(result => {10    assert_false(result.done);11    assert_array_equals(result.value, [0x00, 0x01, 0x02]);12    return reader.read();13  }).then(result => {14    assert_true(result.done);15    assert_array_equals(result.value, []);16  });17}, 'ReadableByteStreamControllerRespondInternal should work');18test(() => {19  const rs = new ReadableStream({20    pull(controller) {21      controller.enqueue('a');22      controller.close();23    }24  });25  const reader = rs.getReader();26  return reader.read().then(result => {27    assert_false(result.done);28    assert_equals(result.value, 'a');29    return reader.read();30  }).then(result => {31    assert_true(result.done);32    assert_equals(result.value, undefined);33  });34}, 'ReadableStreamDefaultControllerRespond should work');35test(() => {36  const rs = new ReadableStream({37    pull(controller) {38      controller.enqueue('a');39      controller.close();40    }41  });42  const reader = rs.getReader();43  return reader.read().then(result => {44    assert_false(result.done);45    assert_equals(result.value, 'a');46    return reader.read();47  }).then(result => {48    assert_true(result.done);49    assert_equals(result.value, undefined);50  });51}, 'ReadableStreamDefaultControllerRespondInternal should work');52test(() => {53  const rs = new ReadableStream({54    pull(controller) {55      const view = new Uint8Array([0x00, 0x01, 0x02]).buffer;56      controller.enqueue(view);57      controller.close();58    }59  });60  const reader = rs.getReader();61  return reader.read().then(result => {62    assert_false(result.done);

Using AI Code Generation

1const {ReadableStream,ReadableStreamController} = require('stream/web');2const {ReadableByteStreamController} = require('stream/web');3const rs = new ReadableStream({4  pull(controller) {5    ReadableByteStreamControllerRespondInternal(controller, 1, true);6  }7});8const reader = rs.getReader();9reader.read().then(10  result => console.log(result),11  error => console.error(error)12);13const {ReadableStream,ReadableStreamController} = require('stream/web');14const {ReadableByteStreamController} = require('stream/web');15const rs = new ReadableStream({16  pull(controller) {17    ReadableByteStreamControllerRespondInternal(controller, 1, false);18  }19});20const reader = rs.getReader();21reader.read().then(22  result => console.log(result),23  error => console.error(error)24);25const {ReadableStream,ReadableStreamController} = require('stream/web');26const {ReadableByteStreamController} = require('stream/web');27const rs = new ReadableStream({28  pull(controller) {29    ReadableByteStreamControllerRespondInternal(controller, 1, true);30  }31});32const reader = rs.getReader();33reader.read().then(34  result => console.log(result),35  error => console.error(error)36);37const {ReadableStream,ReadableStreamController} = require('stream/web');38const {ReadableByteStreamController} = require('stream/web');39const rs = new ReadableStream({40  pull(controller) {41    ReadableByteStreamControllerRespondInternal(controller, 1, false);42  }43});44const reader = rs.getReader();45reader.read().then(46  result => console.log(result),47  error => console.error(error)48);

Using AI Code Generation

1const rs = new ReadableStream({2  start(c) {3    c.enqueue('a');4    c.close();5  }6});7rs.getReader().read().then(() => {8  rs.getReader().releaseLock();9  rs.getReader().read();10});11function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {12  if (controller._pendingPullIntos.length === 0) {13    throw new TypeError('Assertion failed: _pendingPullIntos.length > 0');14  }15  ReadableByteStreamControllerRespondInternal(controller, bytesWritten);16}17function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {18  const firstDescriptor = controller._pendingPullIntos[0];19  if (bytesWritten === 0) {20    throw new TypeError('Assertion failed: bytesWritten > 0');21  }22  ReadableByteStreamControllerRespondInternal(controller, bytesWritten);23}24function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {25  const firstDescriptor = controller._pendingPullIntos[0];26  if (bytesWritten > firstDescriptor.bytesFilled + firstDescriptor.byobRequest._view.byteLength) {27    throw new TypeError('Assertion failed: bytesWritten <= BYOBRequest.view.byteLength');28  }29  ReadableByteStreamControllerRespondInternal(controller, bytesWritten);30}31function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {32  const firstDescriptor = controller._pendingPullIntos[0];33  if (bytesWritten > firstDescriptor.bytesFilled + firstDescriptor.byobRequest._view.byteLength) {34    throw new TypeError('Assertion failed: bytesWritten <= BYOBRequest.view.byteLength');35  }36  ReadableByteStreamControllerRespondInternal(controller, bytesWritten);37}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.