How to use byobReaderBrandCheckException method in wpt
Best JavaScript code snippet using wpt
readable-stream.js
Source:readable-stream.js 
...531 this._readIntoRequests = [];532 }533 get closed() {534 if (!IsReadableStreamBYOBReader(this)) {535 return Promise.reject(byobReaderBrandCheckException('closed'));536 }537 return this._closedPromise;538 }539 cancel(reason) {540 if (!IsReadableStreamBYOBReader(this)) {541 return Promise.reject(byobReaderBrandCheckException('cancel'));542 }543 if (this._ownerReadableStream === undefined) {544 return Promise.reject(readerLockException('cancel'));545 }546 return ReadableStreamReaderGenericCancel(this, reason);547 }548 read(view) {549 if (!IsReadableStreamBYOBReader(this)) {550 return Promise.reject(byobReaderBrandCheckException('read'));551 }552 if (this._ownerReadableStream === undefined) {553 return Promise.reject(readerLockException('read from'));554 }555 if (!ArrayBuffer.isView(view)) {556 return Promise.reject(new TypeError('view must be an array buffer view'));557 }558 if (view.byteLength === 0) {559 return Promise.reject(new TypeError('view must have non-zero byteLength'));560 }561 return ReadableStreamBYOBReaderRead(this, view);562 }563 releaseLock() {564 if (!IsReadableStreamBYOBReader(this)) {565 throw byobReaderBrandCheckException('releaseLock');566 }567 if (this._ownerReadableStream === undefined) {568 return;569 }570 if (this._readIntoRequests.length > 0) {571 throw new TypeError('Tried to release a reader lock when that reader has pending read() calls un-settled');572 }573 ReadableStreamReaderGenericRelease(this);574 }575}576// Abstract operations for the readers.577function IsReadableStreamBYOBReader(x) {578 if (!typeIsObject(x)) {579 return false;580 }581 if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {582 return false;583 }584 return true;585}586function IsReadableStreamDefaultReader(x) {587 if (!typeIsObject(x)) {588 return false;589 }590 if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {591 return false;592 }593 return true;594}595function ReadableStreamReaderGenericInitialize(reader, stream) {596 reader._ownerReadableStream = stream;597 stream._reader = reader;598 if (stream._state === 'readable') {599 defaultReaderClosedPromiseInitialize(reader);600 } else if (stream._state === 'closed') {601 defaultReaderClosedPromiseInitializeAsResolved(reader);602 } else {603 assert(stream._state === 'errored', 'state must be errored');604 defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);605 reader._closedPromise.catch(() => {});606 }607}608// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state609// check.610function ReadableStreamReaderGenericCancel(reader, reason) {611 const stream = reader._ownerReadableStream;612 assert(stream !== undefined);613 return ReadableStreamCancel(stream, reason);614}615function ReadableStreamReaderGenericRelease(reader) {616 assert(reader._ownerReadableStream !== undefined);617 assert(reader._ownerReadableStream._reader === reader);618 if (reader._ownerReadableStream._state === 'readable') {619 defaultReaderClosedPromiseReject(620 reader,621 new TypeError('Reader was released and can no longer be used to monitor the stream\'s closedness'));622 } else {623 defaultReaderClosedPromiseResetToRejected(624 reader,625 new TypeError('Reader was released and can no longer be used to monitor the stream\'s closedness'));626 }627 reader._closedPromise.catch(() => {});628 reader._ownerReadableStream._reader = undefined;629 reader._ownerReadableStream = undefined;630}631function ReadableStreamBYOBReaderRead(reader, view) {632 const stream = reader._ownerReadableStream;633 assert(stream !== undefined);634 stream._disturbed = true;635 if (stream._state === 'errored') {636 return Promise.reject(stream._storedError);637 }638 // Controllers must implement this.639 return ReadableByteStreamControllerPullInto(stream._readableStreamController, view);640}641function ReadableStreamDefaultReaderRead(reader) {642 const stream = reader._ownerReadableStream;643 assert(stream !== undefined);644 stream._disturbed = true;645 if (stream._state === 'closed') {646 return Promise.resolve(CreateIterResultObject(undefined, true));647 }648 if (stream._state === 'errored') {649 return Promise.reject(stream._storedError);650 }651 assert(stream._state === 'readable');652 return stream._readableStreamController[InternalPull]();653}654// Controllers655class ReadableStreamDefaultController {656 constructor(stream, underlyingSource, size, highWaterMark) {657 if (IsReadableStream(stream) === false) {658 throw new TypeError('ReadableStreamDefaultController can only be constructed with a ReadableStream instance');659 }660 if (stream._readableStreamController !== undefined) {661 throw new TypeError(662 'ReadableStreamDefaultController instances can only be created by the ReadableStream constructor');663 }664 this._controlledReadableStream = stream;665 this._underlyingSource = underlyingSource;666 this._queue = [];667 this._started = false;668 this._closeRequested = false;669 this._pullAgain = false;670 this._pulling = false;671 const normalizedStrategy = ValidateAndNormalizeQueuingStrategy(size, highWaterMark);672 this._strategySize = normalizedStrategy.size;673 this._strategyHWM = normalizedStrategy.highWaterMark;674 const controller = this;675 const startResult = InvokeOrNoop(underlyingSource, 'start', [this]);676 Promise.resolve(startResult).then(677 () => {678 controller._started = true;679 assert(controller._pulling === false);680 assert(controller._pullAgain === false);681 ReadableStreamDefaultControllerCallPullIfNeeded(controller);682 },683 r => {684 ReadableStreamDefaultControllerErrorIfNeeded(controller, r);685 }686 )687 .catch(rethrowAssertionErrorRejection);688 }689 get desiredSize() {690 if (IsReadableStreamDefaultController(this) === false) {691 throw defaultControllerBrandCheckException('desiredSize');692 }693 return ReadableStreamDefaultControllerGetDesiredSize(this);694 }695 close() {696 if (IsReadableStreamDefaultController(this) === false) {697 throw defaultControllerBrandCheckException('close');698 }699 if (this._closeRequested === true) {700 throw new TypeError('The stream has already been closed; do not close it again!');701 }702 const state = this._controlledReadableStream._state;703 if (state !== 'readable') {704 throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);705 }706 ReadableStreamDefaultControllerClose(this);707 }708 enqueue(chunk) {709 if (IsReadableStreamDefaultController(this) === false) {710 throw defaultControllerBrandCheckException('enqueue');711 }712 if (this._closeRequested === true) {713 throw new TypeError('stream is closed or draining');714 }715 const state = this._controlledReadableStream._state;716 if (state !== 'readable') {717 throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);718 }719 return ReadableStreamDefaultControllerEnqueue(this, chunk);720 }721 error(e) {722 if (IsReadableStreamDefaultController(this) === false) {723 throw defaultControllerBrandCheckException('error');724 }725 const stream = this._controlledReadableStream;726 if (stream._state !== 'readable') {727 throw new TypeError(`The stream is ${stream._state} and so cannot be errored`);728 }729 ReadableStreamDefaultControllerError(this, e);730 }731 [InternalCancel](reason) {732 this._queue = [];733 return PromiseInvokeOrNoop(this._underlyingSource, 'cancel', [reason]);734 }735 [InternalPull]() {736 const stream = this._controlledReadableStream;737 if (this._queue.length > 0) {738 const chunk = DequeueValue(this._queue);739 if (this._closeRequested === true && this._queue.length === 0) {740 ReadableStreamClose(stream);741 } else {742 ReadableStreamDefaultControllerCallPullIfNeeded(this);743 }744 return Promise.resolve(CreateIterResultObject(chunk, false));745 }746 const pendingPromise = ReadableStreamAddReadRequest(stream);747 ReadableStreamDefaultControllerCallPullIfNeeded(this);748 return pendingPromise;749 }750}751// Abstract operations for the ReadableStreamDefaultController.752function IsReadableStreamDefaultController(x) {753 if (!typeIsObject(x)) {754 return false;755 }756 if (!Object.prototype.hasOwnProperty.call(x, '_underlyingSource')) {757 return false;758 }759 return true;760}761function ReadableStreamDefaultControllerCallPullIfNeeded(controller) {762 const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);763 if (shouldPull === false) {764 return undefined;765 }766 if (controller._pulling === true) {767 controller._pullAgain = true;768 return undefined;769 }770 assert(controller._pullAgain === false);771 controller._pulling = true;772 const pullPromise = PromiseInvokeOrNoop(controller._underlyingSource, 'pull', [controller]);773 pullPromise.then(774 () => {775 controller._pulling = false;776 if (controller._pullAgain === true) {777 controller._pullAgain = false;778 return ReadableStreamDefaultControllerCallPullIfNeeded(controller);779 }780 return undefined;781 },782 e => {783 ReadableStreamDefaultControllerErrorIfNeeded(controller, e);784 }785 )786 .catch(rethrowAssertionErrorRejection);787 return undefined;788}789function ReadableStreamDefaultControllerShouldCallPull(controller) {790 const stream = controller._controlledReadableStream;791 if (stream._state === 'closed' || stream._state === 'errored') {792 return false;793 }794 if (controller._closeRequested === true) {795 return false;796 }797 if (controller._started === false) {798 return false;799 }800 if (IsReadableStreamLocked(stream) === true && ReadableStreamGetNumReadRequests(stream) > 0) {801 return true;802 }803 const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);804 if (desiredSize > 0) {805 return true;806 }807 return false;808}809// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.810function ReadableStreamDefaultControllerClose(controller) {811 const stream = controller._controlledReadableStream;812 assert(controller._closeRequested === false);813 assert(stream._state === 'readable');814 controller._closeRequested = true;815 if (controller._queue.length === 0) {816 ReadableStreamClose(stream);817 }818}819function ReadableStreamDefaultControllerEnqueue(controller, chunk) {820 const stream = controller._controlledReadableStream;821 assert(controller._closeRequested === false);822 assert(stream._state === 'readable');823 if (IsReadableStreamLocked(stream) === true && ReadableStreamGetNumReadRequests(stream) > 0) {824 ReadableStreamFulfillReadRequest(stream, chunk, false);825 } else {826 let chunkSize = 1;827 if (controller._strategySize !== undefined) {828 try {829 chunkSize = controller._strategySize(chunk);830 } catch (chunkSizeE) {831 ReadableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);832 throw chunkSizeE;833 }834 }835 try {836 EnqueueValueWithSize(controller._queue, chunk, chunkSize);837 } catch (enqueueE) {838 ReadableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);839 throw enqueueE;840 }841 }842 ReadableStreamDefaultControllerCallPullIfNeeded(controller);843 return undefined;844}845function ReadableStreamDefaultControllerError(controller, e) {846 const stream = controller._controlledReadableStream;847 assert(stream._state === 'readable');848 controller._queue = [];849 ReadableStreamError(stream, e);850}851function ReadableStreamDefaultControllerErrorIfNeeded(controller, e) {852 if (controller._controlledReadableStream._state === 'readable') {853 ReadableStreamDefaultControllerError(controller, e);854 }855}856function ReadableStreamDefaultControllerGetDesiredSize(controller) {857 const queueSize = GetTotalQueueSize(controller._queue);858 return controller._strategyHWM - queueSize;859}860class ReadableStreamBYOBRequest {861 constructor(controller, view) {862 this._associatedReadableByteStreamController = controller;863 this._view = view;864 }865 get view() {866 return this._view;867 }868 respond(bytesWritten) {869 if (IsReadableStreamBYOBRequest(this) === false) {870 throw byobRequestBrandCheckException('respond');871 }872 if (this._associatedReadableByteStreamController === undefined) {873 throw new TypeError('This BYOB request has been invalidated');874 }875 ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);876 }877 respondWithNewView(view) {878 if (IsReadableStreamBYOBRequest(this) === false) {879 throw byobRequestBrandCheckException('respond');880 }881 if (this._associatedReadableByteStreamController === undefined) {882 throw new TypeError('This BYOB request has been invalidated');883 }884 if (!ArrayBuffer.isView(view)) {885 throw new TypeError('You can only respond with array buffer views');886 }887 ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);888 }889}890class ReadableByteStreamController {891 constructor(stream, underlyingByteSource, highWaterMark) {892 if (IsReadableStream(stream) === false) {893 throw new TypeError('ReadableByteStreamController can only be constructed with a ReadableStream instance given ' +894 'a byte source');895 }896 if (stream._readableStreamController !== undefined) {897 throw new TypeError(898 'ReadableByteStreamController instances can only be created by the ReadableStream constructor given a byte ' +899 'source');900 }901 this._controlledReadableStream = stream;902 this._underlyingByteSource = underlyingByteSource;903 this._pullAgain = false;904 this._pulling = false;905 ReadableByteStreamControllerClearPendingPullIntos(this);906 this._queue = [];907 this._totalQueuedBytes = 0;908 this._closeRequested = false;909 this._started = false;910 this._strategyHWM = ValidateAndNormalizeHighWaterMark(highWaterMark);911 const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;912 if (autoAllocateChunkSize !== undefined) {913 if (Number.isInteger(autoAllocateChunkSize) === false || autoAllocateChunkSize <= 0) {914 throw new RangeError('autoAllocateChunkSize must be a positive integer');915 }916 }917 this._autoAllocateChunkSize = autoAllocateChunkSize;918 this._pendingPullIntos = [];919 const controller = this;920 const startResult = InvokeOrNoop(underlyingByteSource, 'start', [this]);921 Promise.resolve(startResult).then(922 () => {923 controller._started = true;924 assert(controller._pulling === false);925 assert(controller._pullAgain === false);926 ReadableByteStreamControllerCallPullIfNeeded(controller);927 },928 r => {929 if (stream._state === 'readable') {930 ReadableByteStreamControllerError(controller, r);931 }932 }933 )934 .catch(rethrowAssertionErrorRejection);935 }936 get byobRequest() {937 if (IsReadableByteStreamController(this) === false) {938 throw byteStreamControllerBrandCheckException('byobRequest');939 }940 if (this._byobRequest === undefined && this._pendingPullIntos.length > 0) {941 const firstDescriptor = this._pendingPullIntos[0];942 const view = new Uint8Array(firstDescriptor.buffer,943 firstDescriptor.byteOffset + firstDescriptor.bytesFilled,944 firstDescriptor.byteLength - firstDescriptor.bytesFilled);945 this._byobRequest = new ReadableStreamBYOBRequest(this, view);946 }947 return this._byobRequest;948 }949 get desiredSize() {950 if (IsReadableByteStreamController(this) === false) {951 throw byteStreamControllerBrandCheckException('desiredSize');952 }953 return ReadableByteStreamControllerGetDesiredSize(this);954 }955 close() {956 if (IsReadableByteStreamController(this) === false) {957 throw byteStreamControllerBrandCheckException('close');958 }959 if (this._closeRequested === true) {960 throw new TypeError('The stream has already been closed; do not close it again!');961 }962 const state = this._controlledReadableStream._state;963 if (state !== 'readable') {964 throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);965 }966 ReadableByteStreamControllerClose(this);967 }968 enqueue(chunk) {969 if (IsReadableByteStreamController(this) === false) {970 throw byteStreamControllerBrandCheckException('enqueue');971 }972 if (this._closeRequested === true) {973 throw new TypeError('stream is closed or draining');974 }975 const state = this._controlledReadableStream._state;976 if (state !== 'readable') {977 throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);978 }979 if (!ArrayBuffer.isView(chunk)) {980 throw new TypeError('You can only enqueue array buffer views when using a ReadableByteStreamController');981 }982 ReadableByteStreamControllerEnqueue(this, chunk);983 }984 error(e) {985 if (IsReadableByteStreamController(this) === false) {986 throw byteStreamControllerBrandCheckException('error');987 }988 const stream = this._controlledReadableStream;989 if (stream._state !== 'readable') {990 throw new TypeError(`The stream is ${stream._state} and so cannot be errored`);991 }992 ReadableByteStreamControllerError(this, e);993 }994 [InternalCancel](reason) {995 if (this._pendingPullIntos.length > 0) {996 const firstDescriptor = this._pendingPullIntos[0];997 firstDescriptor.bytesFilled = 0;998 }999 this._queue = [];1000 this._totalQueuedBytes = 0;1001 return PromiseInvokeOrNoop(this._underlyingByteSource, 'cancel', [reason]);1002 }1003 [InternalPull]() {1004 const stream = this._controlledReadableStream;1005 if (ReadableStreamGetNumReadRequests(stream) === 0) {1006 if (this._totalQueuedBytes > 0) {1007 const entry = this._queue.shift();1008 this._totalQueuedBytes -= entry.byteLength;1009 ReadableByteStreamControllerHandleQueueDrain(this);1010 let view;1011 try {1012 view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);1013 } catch (viewE) {1014 return Promise.reject(viewE);1015 }1016 return Promise.resolve(CreateIterResultObject(view, false));1017 }1018 const autoAllocateChunkSize = this._autoAllocateChunkSize;1019 if (autoAllocateChunkSize !== undefined) {1020 let buffer;1021 try {1022 buffer = new ArrayBuffer(autoAllocateChunkSize);1023 } catch (bufferE) {1024 return Promise.reject(bufferE);1025 }1026 const pullIntoDescriptor = {1027 buffer,1028 byteOffset: 0,1029 byteLength: autoAllocateChunkSize,1030 bytesFilled: 0,1031 elementSize: 1,1032 ctor: Uint8Array,1033 readerType: 'default'1034 };1035 this._pendingPullIntos.push(pullIntoDescriptor);1036 }1037 } else {1038 assert(this._autoAllocateChunkSize === undefined);1039 }1040 const promise = ReadableStreamAddReadRequest(stream);1041 ReadableByteStreamControllerCallPullIfNeeded(this);1042 return promise;1043 }1044}1045// Abstract operations for the ReadableByteStreamController.1046function IsReadableByteStreamController(x) {1047 if (!typeIsObject(x)) {1048 return false;1049 }1050 if (!Object.prototype.hasOwnProperty.call(x, '_underlyingByteSource')) {1051 return false;1052 }1053 return true;1054}1055function IsReadableStreamBYOBRequest(x) {1056 if (!typeIsObject(x)) {1057 return false;1058 }1059 if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {1060 return false;1061 }1062 return true;1063}1064function ReadableByteStreamControllerCallPullIfNeeded(controller) {1065 const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);1066 if (shouldPull === false) {1067 return undefined;1068 }1069 if (controller._pulling === true) {1070 controller._pullAgain = true;1071 return undefined;1072 }1073 assert(controller._pullAgain === false);1074 controller._pulling = true;1075 // TODO: Test controller argument1076 const pullPromise = PromiseInvokeOrNoop(controller._underlyingByteSource, 'pull', [controller]);1077 pullPromise.then(1078 () => {1079 controller._pulling = false;1080 if (controller._pullAgain === true) {1081 controller._pullAgain = false;1082 ReadableByteStreamControllerCallPullIfNeeded(controller);1083 }1084 },1085 e => {1086 if (controller._controlledReadableStream._state === 'readable') {1087 ReadableByteStreamControllerError(controller, e);1088 }1089 }1090 )1091 .catch(rethrowAssertionErrorRejection);1092 return undefined;1093}1094function ReadableByteStreamControllerClearPendingPullIntos(controller) {1095 ReadableByteStreamControllerInvalidateBYOBRequest(controller);1096 controller._pendingPullIntos = [];1097}1098function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) {1099 assert(stream._state !== 'errored', 'state must not be errored');1100 let done = false;1101 if (stream._state === 'closed') {1102 assert(pullIntoDescriptor.bytesFilled === 0);1103 done = true;1104 }1105 const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);1106 if (pullIntoDescriptor.readerType === 'default') {1107 ReadableStreamFulfillReadRequest(stream, filledView, done);1108 } else {1109 assert(pullIntoDescriptor.readerType === 'byob');1110 ReadableStreamFulfillReadIntoRequest(stream, filledView, done);1111 }1112}1113function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) {1114 const bytesFilled = pullIntoDescriptor.bytesFilled;1115 const elementSize = pullIntoDescriptor.elementSize;1116 assert(bytesFilled <= pullIntoDescriptor.byteLength);1117 assert(bytesFilled % elementSize === 0);1118 return new pullIntoDescriptor.ctor(1119 pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize);1120}1121function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) {1122 controller._queue.push({ buffer, byteOffset, byteLength });1123 controller._totalQueuedBytes += byteLength;1124}1125function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) {1126 const elementSize = pullIntoDescriptor.elementSize;1127 const currentAlignedBytes = pullIntoDescriptor.bytesFilled - pullIntoDescriptor.bytesFilled % elementSize;1128 const maxBytesToCopy = Math.min(controller._totalQueuedBytes,1129 pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);1130 const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;1131 const maxAlignedBytes = maxBytesFilled - maxBytesFilled % elementSize;1132 let totalBytesToCopyRemaining = maxBytesToCopy;1133 let ready = false;1134 if (maxAlignedBytes > currentAlignedBytes) {1135 totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;1136 ready = true;1137 }1138 const queue = controller._queue;1139 while (totalBytesToCopyRemaining > 0) {1140 const headOfQueue = queue[0];1141 const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);1142 const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;1143 ArrayBufferCopy(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);1144 if (headOfQueue.byteLength === bytesToCopy) {1145 queue.shift();1146 } else {1147 headOfQueue.byteOffset += bytesToCopy;1148 headOfQueue.byteLength -= bytesToCopy;1149 }1150 controller._totalQueuedBytes -= bytesToCopy;1151 ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);1152 totalBytesToCopyRemaining -= bytesToCopy;1153 }1154 if (ready === false) {1155 assert(controller._totalQueuedBytes === 0, 'queue must be empty');1156 assert(pullIntoDescriptor.bytesFilled > 0);1157 assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize);1158 }1159 return ready;1160}1161function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) {1162 assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos[0] === pullIntoDescriptor);1163 ReadableByteStreamControllerInvalidateBYOBRequest(controller);1164 pullIntoDescriptor.bytesFilled += size;1165}1166function ReadableByteStreamControllerHandleQueueDrain(controller) {1167 assert(controller._controlledReadableStream._state === 'readable');1168 if (controller._totalQueuedBytes === 0 && controller._closeRequested === true) {1169 ReadableStreamClose(controller._controlledReadableStream);1170 } else {1171 ReadableByteStreamControllerCallPullIfNeeded(controller);1172 }1173}1174function ReadableByteStreamControllerInvalidateBYOBRequest(controller) {1175 if (controller._byobRequest === undefined) {1176 return;1177 }1178 controller._byobRequest._associatedReadableByteStreamController = undefined;1179 controller._byobRequest._view = undefined;1180 controller._byobRequest = undefined;1181}1182function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) {1183 assert(controller._closeRequested === false);1184 while (controller._pendingPullIntos.length > 0) {1185 if (controller._totalQueuedBytes === 0) {1186 return;1187 }1188 const pullIntoDescriptor = controller._pendingPullIntos[0];1189 if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) === true) {1190 ReadableByteStreamControllerShiftPendingPullInto(controller);1191 ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableStream, pullIntoDescriptor);1192 }1193 }1194}1195function ReadableByteStreamControllerPullInto(controller, view) {1196 const stream = controller._controlledReadableStream;1197 let elementSize = 1;1198 if (view.constructor !== DataView) {1199 elementSize = view.constructor.BYTES_PER_ELEMENT;1200 }1201 const ctor = view.constructor;1202 const pullIntoDescriptor = {1203 buffer: view.buffer,1204 byteOffset: view.byteOffset,1205 byteLength: view.byteLength,1206 bytesFilled: 0,1207 elementSize,1208 ctor,1209 readerType: 'byob'1210 };1211 if (controller._pendingPullIntos.length > 0) {1212 pullIntoDescriptor.buffer = SameRealmTransfer(pullIntoDescriptor.buffer);1213 controller._pendingPullIntos.push(pullIntoDescriptor);1214 // No ReadableByteStreamControllerCallPullIfNeeded() call since:1215 // - No change happens on desiredSize1216 // - The source has already been notified of that there's at least 1 pending read(view)1217 return ReadableStreamAddReadIntoRequest(stream);1218 }1219 if (stream._state === 'closed') {1220 const emptyView = new view.constructor(view.buffer, view.byteOffset, 0);1221 return Promise.resolve(CreateIterResultObject(emptyView, true));1222 }1223 if (controller._totalQueuedBytes > 0) {1224 if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) === true) {1225 const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);1226 ReadableByteStreamControllerHandleQueueDrain(controller);1227 return Promise.resolve(CreateIterResultObject(filledView, false));1228 }1229 if (controller._closeRequested === true) {1230 const e = new TypeError('Insufficient bytes to fill elements in the given buffer');1231 ReadableByteStreamControllerError(controller, e);1232 return Promise.reject(e);1233 }1234 }1235 pullIntoDescriptor.buffer = SameRealmTransfer(pullIntoDescriptor.buffer);1236 controller._pendingPullIntos.push(pullIntoDescriptor);1237 const promise = ReadableStreamAddReadIntoRequest(stream);1238 ReadableByteStreamControllerCallPullIfNeeded(controller);1239 return promise;1240}1241function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) {1242 firstDescriptor.buffer = SameRealmTransfer(firstDescriptor.buffer);1243 assert(firstDescriptor.bytesFilled === 0, 'bytesFilled must be 0');1244 const stream = controller._controlledReadableStream;1245 while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {1246 const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);1247 ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);1248 }1249}1250function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) {1251 if (pullIntoDescriptor.bytesFilled + bytesWritten > pullIntoDescriptor.byteLength) {1252 throw new RangeError('bytesWritten out of range');1253 }1254 ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);1255 if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize) {1256 // TODO: Figure out whether we should detach the buffer or not here.1257 return;1258 }1259 ReadableByteStreamControllerShiftPendingPullInto(controller);1260 const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;1261 if (remainderSize > 0) {1262 const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;1263 const remainder = pullIntoDescriptor.buffer.slice(end - remainderSize, end);1264 ReadableByteStreamControllerEnqueueChunkToQueue(controller, remainder, 0, remainder.byteLength);1265 }1266 pullIntoDescriptor.buffer = SameRealmTransfer(pullIntoDescriptor.buffer);1267 pullIntoDescriptor.bytesFilled -= remainderSize;1268 ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableStream, pullIntoDescriptor);1269 ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);1270}1271function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {1272 const firstDescriptor = controller._pendingPullIntos[0];1273 const stream = controller._controlledReadableStream;1274 if (stream._state === 'closed') {1275 if (bytesWritten !== 0) {1276 throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');1277 }1278 ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);1279 } else {1280 assert(stream._state === 'readable');1281 ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);1282 }1283}1284function ReadableByteStreamControllerShiftPendingPullInto(controller) {1285 const descriptor = controller._pendingPullIntos.shift();1286 ReadableByteStreamControllerInvalidateBYOBRequest(controller);1287 return descriptor;1288}1289function ReadableByteStreamControllerShouldCallPull(controller) {1290 const stream = controller._controlledReadableStream;1291 if (stream._state !== 'readable') {1292 return false;1293 }1294 if (controller._closeRequested === true) {1295 return false;1296 }1297 if (controller._started === false) {1298 return false;1299 }1300 if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {1301 return true;1302 }1303 if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {1304 return true;1305 }1306 if (ReadableByteStreamControllerGetDesiredSize(controller) > 0) {1307 return true;1308 }1309 return false;1310}1311// A client of ReadableByteStreamController may use these functions directly to bypass state check.1312function ReadableByteStreamControllerClose(controller) {1313 const stream = controller._controlledReadableStream;1314 assert(controller._closeRequested === false);1315 assert(stream._state === 'readable');1316 if (controller._totalQueuedBytes > 0) {1317 controller._closeRequested = true;1318 return;1319 }1320 if (controller._pendingPullIntos.length > 0) {1321 const firstPendingPullInto = controller._pendingPullIntos[0];1322 if (firstPendingPullInto.bytesFilled > 0) {1323 const e = new TypeError('Insufficient bytes to fill elements in the given buffer');1324 ReadableByteStreamControllerError(controller, e);1325 throw e;1326 }1327 }1328 ReadableStreamClose(stream);1329}1330function ReadableByteStreamControllerEnqueue(controller, chunk) {1331 const stream = controller._controlledReadableStream;1332 assert(controller._closeRequested === false);1333 assert(stream._state === 'readable');1334 const buffer = chunk.buffer;1335 const byteOffset = chunk.byteOffset;1336 const byteLength = chunk.byteLength;1337 const transferredBuffer = SameRealmTransfer(buffer);1338 if (ReadableStreamHasDefaultReader(stream) === true) {1339 if (ReadableStreamGetNumReadRequests(stream) === 0) {1340 ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);1341 } else {1342 assert(controller._queue.length === 0);1343 const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);1344 ReadableStreamFulfillReadRequest(stream, transferredView, false);1345 }1346 } else if (ReadableStreamHasBYOBReader(stream) === true) {1347 // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.1348 ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);1349 ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);1350 } else {1351 assert(IsReadableStreamLocked(stream) === false, 'stream must not be locked');1352 ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);1353 }1354}1355function ReadableByteStreamControllerError(controller, e) {1356 const stream = controller._controlledReadableStream;1357 assert(stream._state === 'readable');1358 ReadableByteStreamControllerClearPendingPullIntos(controller);1359 controller._queue = [];1360 ReadableStreamError(stream, e);1361}1362function ReadableByteStreamControllerGetDesiredSize(controller) {1363 return controller._strategyHWM - controller._totalQueuedBytes;1364}1365function ReadableByteStreamControllerRespond(controller, bytesWritten) {1366 bytesWritten = Number(bytesWritten);1367 if (IsFiniteNonNegativeNumber(bytesWritten) === false) {1368 throw new RangeError('bytesWritten must be a finite');1369 }1370 assert(controller._pendingPullIntos.length > 0);1371 ReadableByteStreamControllerRespondInternal(controller, bytesWritten);1372}1373function ReadableByteStreamControllerRespondWithNewView(controller, view) {1374 assert(controller._pendingPullIntos.length > 0);1375 const firstDescriptor = controller._pendingPullIntos[0];1376 if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {1377 throw new RangeError('The region specified by view does not match byobRequest');1378 }1379 if (firstDescriptor.byteLength !== view.byteLength) {1380 throw new RangeError('The buffer of view has different capacity than byobRequest');1381 }1382 firstDescriptor.buffer = view.buffer;1383 ReadableByteStreamControllerRespondInternal(controller, view.byteLength);1384}1385// Helper functions for the ReadableStream.1386function streamBrandCheckException(name) {1387 return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);1388}1389// Helper functions for the readers.1390function readerLockException(name) {1391 return new TypeError('Cannot ' + name + ' a stream using a released reader');1392}1393// Helper functions for the ReadableStreamDefaultReader.1394function defaultReaderBrandCheckException(name) {1395 return new TypeError(1396 `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);1397}1398function defaultReaderClosedPromiseInitialize(reader) {1399 reader._closedPromise = new Promise((resolve, reject) => {1400 reader._closedPromise_resolve = resolve;1401 reader._closedPromise_reject = reject;1402 });1403}1404function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) {1405 reader._closedPromise = Promise.reject(reason);1406 reader._closedPromise_resolve = undefined;1407 reader._closedPromise_reject = undefined;1408}1409function defaultReaderClosedPromiseInitializeAsResolved(reader) {1410 reader._closedPromise = Promise.resolve(undefined);1411 reader._closedPromise_resolve = undefined;1412 reader._closedPromise_reject = undefined;1413}1414function defaultReaderClosedPromiseReject(reader, reason) {1415 assert(reader._closedPromise_resolve !== undefined);1416 assert(reader._closedPromise_reject !== undefined);1417 reader._closedPromise_reject(reason);1418 reader._closedPromise_resolve = undefined;1419 reader._closedPromise_reject = undefined;1420}1421function defaultReaderClosedPromiseResetToRejected(reader, reason) {1422 assert(reader._closedPromise_resolve === undefined);1423 assert(reader._closedPromise_reject === undefined);1424 reader._closedPromise = Promise.reject(reason);1425}1426function defaultReaderClosedPromiseResolve(reader) {1427 assert(reader._closedPromise_resolve !== undefined);1428 assert(reader._closedPromise_reject !== undefined);1429 reader._closedPromise_resolve(undefined);1430 reader._closedPromise_resolve = undefined;1431 reader._closedPromise_reject = undefined;1432}1433// Helper functions for the ReadableStreamDefaultReader.1434function byobReaderBrandCheckException(name) {1435 return new TypeError(1436 `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);1437}1438// Helper functions for the ReadableStreamDefaultController.1439function defaultControllerBrandCheckException(name) {1440 return new TypeError(1441 `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);1442}1443// Helper functions for the ReadableStreamBYOBRequest.1444function byobRequestBrandCheckException(name) {1445 return new TypeError(1446 `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);1447}1448// Helper functions for the ReadableByteStreamController....
byob-reader.ts
Source:byob-reader.ts
...101 * the reader's lock is released before the stream finishes closing.102 */103 get closed(): Promise<void> {104 if (!IsReadableStreamBYOBReader(this)) {105 return promiseRejectedWith(byobReaderBrandCheckException('closed'));106 }107 return this._closedPromise;108 }109 /**110 * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.111 */112 cancel(reason: any = undefined): Promise<void> {113 if (!IsReadableStreamBYOBReader(this)) {114 return promiseRejectedWith(byobReaderBrandCheckException('cancel'));115 }116 if (this._ownerReadableStream === undefined) {117 return promiseRejectedWith(readerLockException('cancel'));118 }119 return ReadableStreamReaderGenericCancel(this, reason);120 }121 /**122 * Attempts to reads bytes into view, and returns a promise resolved with the result.123 *124 * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.125 */126 read<T extends ArrayBufferView>(view: T): Promise<ReadableStreamBYOBReadResult<T>> {127 if (!IsReadableStreamBYOBReader(this)) {128 return promiseRejectedWith(byobReaderBrandCheckException('read'));129 }130 if (!ArrayBuffer.isView(view)) {131 return promiseRejectedWith(new TypeError('view must be an array buffer view'));132 }133 if (view.byteLength === 0) {134 return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));135 }136 if (view.buffer.byteLength === 0) {137 return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));138 }139 if (this._ownerReadableStream === undefined) {140 return promiseRejectedWith(readerLockException('read from'));141 }142 let resolvePromise!: (result: ReadableStreamBYOBReadResult<T>) => void;143 let rejectPromise!: (reason: any) => void;144 const promise = newPromise<ReadableStreamBYOBReadResult<T>>((resolve, reject) => {145 resolvePromise = resolve;146 rejectPromise = reject;147 });148 const readIntoRequest: ReadIntoRequest<T> = {149 _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),150 _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),151 _errorSteps: e => rejectPromise(e)152 };153 ReadableStreamBYOBReaderRead(this, view, readIntoRequest);154 return promise;155 }156 /**157 * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.158 * If the associated stream is errored when the lock is released, the reader will appear errored in the same way159 * from now on; otherwise, the reader will appear closed.160 *161 * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by162 * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to163 * do so will throw a `TypeError` and leave the reader locked to the stream.164 */165 releaseLock(): void {166 if (!IsReadableStreamBYOBReader(this)) {167 throw byobReaderBrandCheckException('releaseLock');168 }169 if (this._ownerReadableStream === undefined) {170 return;171 }172 if (this._readIntoRequests.length > 0) {173 throw new TypeError('Tried to release a reader lock when that reader has pending read() calls un-settled');174 }175 ReadableStreamReaderGenericRelease(this);176 }177}178Object.defineProperties(ReadableStreamBYOBReader.prototype, {179 cancel: { enumerable: true },180 read: { enumerable: true },181 releaseLock: { enumerable: true },182 closed: { enumerable: true }183});184if (typeof Symbol.toStringTag === 'symbol') {185 Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {186 value: 'ReadableStreamBYOBReader',187 configurable: true188 });189}190// Abstract operations for the readers.191export function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {192 if (!typeIsObject(x)) {193 return false;194 }195 if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {196 return false;197 }198 return true;199}200function ReadableStreamBYOBReaderRead<T extends ArrayBufferView>(reader: ReadableStreamBYOBReader,201 view: T,202 readIntoRequest: ReadIntoRequest<T>): void {203 const stream = reader._ownerReadableStream;204 assert(stream !== undefined);205 stream._disturbed = true;206 if (stream._state === 'errored') {207 readIntoRequest._errorSteps(stream._storedError);208 } else {209 ReadableByteStreamControllerPullInto(210 stream._readableStreamController as ReadableByteStreamController,211 view,212 readIntoRequest213 );214 }215}216// Helper functions for the ReadableStreamBYOBReader.217function byobReaderBrandCheckException(name: string): TypeError {218 return new TypeError(219 `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);...
Using AI Code Generation
1function byobReaderBrandCheckException() {2 var byobReader = new ReadableStream({3 start(controller) {4 controller.enqueue(new Uint8Array(1));5 }6 }).getReader({mode: 'byob'});7 var view = new Uint8Array(1);8 byobReader.read(view);9 byobReader.read(view);10}11function byobReaderReadIntoException() {12 var byobReader = new ReadableStream({13 start(controller) {14 controller.enqueue(new Uint8Array(1));15 }16 }).getReader({mode: 'byob'});17 var view = new Uint8Array(1);18 byobReader.read(view);19 byobReader.read(view);20}21function byobReaderReadIntoException() {22 var byobReader = new ReadableStream({23 start(controller) {24 controller.enqueue(new Uint8Array(1));25 }26 }).getReader({mode: 'byob'});27 var view = new Uint8Array(1);28 byobReader.read(view);29 byobReader.read(view);30}31function byobReaderReadIntoException() {32 var byobReader = new ReadableStream({33 start(controller) {34 controller.enqueue(new Uint8Array(1));35 }36 }).getReader({mode: 'byob'});37 var view = new Uint8Array(1);38 byobReader.read(view);39 byobReader.read(view);40}41function byobReaderReadIntoException() {42 var byobReader = new ReadableStream({43 start(controller) {44 controller.enqueue(new Uint8Array(1));45 }46 }).getReader({mode: 'byob'});47 var view = new Uint8Array(1);48 byobReader.read(view);49 byobReader.read(view);50}51function byobReaderReadIntoException() {
Using AI Code Generation
1function byobReaderBrandCheckException() {2 return new ReadableStream({3 start(controller) {4 const view = new Uint8Array([1, 2, 3]).buffer;5 const reader = controller.byobRequest.getReader();6 assert_throws_js(TypeError, () => reader.read(view));7 }8 });9}10function byobRequestBrandCheckException() {11 return new ReadableStream({12 start(controller) {13 const view = new Uint8Array([1, 2, 3]).buffer;14 const reader = controller.byobRequest.getReader();15 assert_throws_js(TypeError, () => reader.read(view));16 }17 });18}19function byobRequestBrandCheckException() {20 return new ReadableStream({21 start(controller) {22 const view = new Uint8Array([1, 2, 3]).buffer;23 const reader = controller.byobRequest.getReader();24 assert_throws_js(TypeError, () => reader.read(view));25 }26 });27}28function byobRequestBrandCheckException() {29 return new ReadableStream({30 start(controller) {31 const view = new Uint8Array([1, 2, 3]).buffer;32 const reader = controller.byobRequest.getReader();33 assert_throws_js(TypeError, () => reader.read(view));34 }35 });36}37function byobRequestBrandCheckException() {38 return new ReadableStream({39 start(controller) {40 const view = new Uint8Array([1, 2, 3]).buffer;41 const reader = controller.byobRequest.getReader();42 assert_throws_js(TypeError, () => reader.read(view));43 }44 });45}46function byobRequestBrandCheckException() {47 return new ReadableStream({48 start(controller) {49 const view = new Uint8Array([1, 2, 3]).buffer;
Using AI Code Generation
1function byobReaderBrandCheckException(t) {2 const controller = new ReadableStreamDefaultController({});3 assert_throws_js(TypeError, () => {4 controller.byobRequest;5 }, 'byobRequest getter should throw a TypeError');6}7function byobReaderBrandCheckException(t) {8 const controller = new ReadableStreamDefaultController({});9 assert_throws_js(TypeError, () => {10 controller.byobRequest;11 }, 'byobRequest getter should throw a TypeError');12}13function byobReaderBrandCheckException(t) {14 const controller = new ReadableStreamDefaultController({});15 assert_throws_js(TypeError, () => {16 controller.byobRequest;17 }, 'byobRequest getter should throw a TypeError');18}19function byobReaderBrandCheckException(t) {20 const controller = new ReadableStreamDefaultController({});21 assert_throws_js(TypeError, () => {22 controller.byobRequest;23 }, 'byobRequest getter should throw a TypeError');24}25function byobReaderBrandCheckException(t) {26 const controller = new ReadableStreamDefaultController({});27 assert_throws_js(TypeError, () => {28 controller.byobRequest;29 }, 'byobRequest getter should throw a TypeError');30}31function byobReaderBrandCheckException(t) {32 const controller = new ReadableStreamDefaultController({});33 assert_throws_js(TypeError, () => {34 controller.byobRequest;35 }, 'byobRequest getter should throw a TypeError');36}37function byobReaderBrandCheckException(t) {38 const controller = new ReadableStreamDefaultController({});39 assert_throws_js(TypeError, () => {40 controller.byobRequest;41 }, 'byobRequest getter should throw a TypeError');42}43function byobReaderBrandCheckException(t) {44 const controller = new ReadableStreamDefaultController({});45 assert_throws_js(TypeError, () => {
Using AI Code Generation
1var decoder = new TextDecoder();2var bytes = new Uint8Array([0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A]);3var string = decoder.decode(bytes);4var decoder = new TextDecoder();5var bytes = new Uint8Array([0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A]);6var string = decoder.decode(bytes);7var decoder = new TextDecoder();8var bytes = new Uint8Array([0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
Using AI Code Generation
1var test = async_test("BYOB reader brand check exception test");2test.step(function() {3 var controller;4 var reader = new ReadableStream({5 start: function(c) {6 controller = c;7 }8 }).getReader({mode: "byob"});9 var view = new Uint8Array(1);10 var promise = reader.read(view);11 promise.catch(function() {12 test.done();13 });14 controller.error();15});16var test = async_test("BYOB reader brand check exception test");17test.step(function() {18 var controller;19 var reader = new ReadableStream({20 start: function(c) {21 controller = c;22 }23 }).getReader({mode: "byob"});24 var view = new Uint8Array(1);25 var promise = reader.read(view);26 promise.catch(function() {27 test.done();28 });29 controller.error();30});31var test = async_test("BYOB reader brand check exception test");32test.step(function() {33 var controller;34 var reader = new ReadableStream({35 start: function(c) {36 controller = c;37 }38 }).getReader({mode: "byob"});39 var view = new Uint8Array(1);40 var promise = reader.read(view);41 promise.catch(function() {42 test.done();43 });44 controller.error();45});46var test = async_test("BYOB reader brand check exception test");47test.step(function() {48 var controller;49 var reader = new ReadableStream({50 start: function(c) {51 controller = c;52 }53 }).getReader({mode: "byob"});54 var view = new Uint8Array(1);
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