How to use ReadableStreamDefaultControllerGetDesiredSize method in wpt
Best JavaScript code snippet using wpt
transform-stream.js
Source:transform-stream.js 
...35 transformStream._readableClosed = true;36 TransformStreamErrorIfNeeded(transformStream, e);37 throw transformStream._storedError;38 }39 const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);40 const maybeBackpressure = desiredSize <= 0;41 if (maybeBackpressure === true && transformStream._backpressure === false) {42 // This allows pull() again. When desiredSize is 0, it's possible that a pull() will happen immediately (but43 // asynchronously) after this because of pending read()s and set _backpressure back to false.44 //45 // If pull() could be called from inside enqueue(), then this logic would be wrong. This cannot happen46 // because there is always a promise pending from start() or pull() when _backpressure is false.47 TransformStreamSetBackpressure(transformStream, true);48 }49}50function TransformStreamError(transformStream, e) {51 if (transformStream._errored === true) {52 throw new TypeError('TransformStream is already errored');53 }54 TransformStreamErrorInternal(transformStream, e);55}56// Abstract operations.57function TransformStreamCloseReadableInternal(transformStream) {58 assert(transformStream._errored === false);59 assert(transformStream._readableClosed === false);60 try {61 ReadableStreamDefaultControllerClose(transformStream._readableController);62 } catch (e) {63 assert(false);64 }65 transformStream._readableClosed = true;66}67function TransformStreamErrorIfNeeded(transformStream, e) {68 if (transformStream._errored === false) {69 TransformStreamErrorInternal(transformStream, e);70 }71}72function TransformStreamErrorInternal(transformStream, e) {73 // console.log('TransformStreamErrorInternal()');74 assert(transformStream._errored === false);75 transformStream._errored = true;76 transformStream._storedError = e;77 if (transformStream._writableDone === false) {78 WritableStreamDefaultControllerError(transformStream._writableController, e);79 }80 if (transformStream._readableClosed === false) {81 ReadableStreamDefaultControllerError(transformStream._readableController, e);82 }83}84// Used for preventing the next write() call on TransformStreamSink until there85// is no longer backpressure.86function TransformStreamReadableReadyPromise(transformStream) {87 assert(transformStream._backpressureChangePromise !== undefined,88 '_backpressureChangePromise should have been initialized');89 if (transformStream._backpressure === false) {90 return Promise.resolve();91 }92 assert(transformStream._backpressure === true, '_backpressure should have been initialized');93 return transformStream._backpressureChangePromise;94}95function TransformStreamSetBackpressure(transformStream, backpressure) {96 // console.log(`TransformStreamSetBackpressure(${backpressure})`);97 // Passes also when called during construction.98 assert(transformStream._backpressure !== backpressure,99 'TransformStreamSetBackpressure() should be called only when backpressure is changed');100 if (transformStream._backpressureChangePromise !== undefined) {101 // The fulfillment value is just for a sanity check.102 transformStream._backpressureChangePromise_resolve(backpressure);103 }104 transformStream._backpressureChangePromise = new Promise(resolve => {105 transformStream._backpressureChangePromise_resolve = resolve;106 });107 transformStream._backpressureChangePromise.then(resolution => {108 assert(resolution !== backpressure,109 '_backpressureChangePromise should be fulfilled only when backpressure is changed');110 });111 transformStream._backpressure = backpressure;112}113function TransformStreamDefaultTransform(chunk, transformStreamController) {114 const transformStream = transformStreamController._controlledTransformStream;115 TransformStreamEnqueueToReadable(transformStream, chunk);116 return Promise.resolve();117}118function TransformStreamTransform(transformStream, chunk) {119 // console.log('TransformStreamTransform()');120 assert(transformStream._errored === false);121 assert(transformStream._transforming === false);122 assert(transformStream._backpressure === false);123 transformStream._transforming = true;124 const transformer = transformStream._transformer;125 const controller = transformStream._transformStreamController;126 const transformPromise = PromiseInvokeOrPerformFallback(transformer, 'transform', [chunk, controller],127 TransformStreamDefaultTransform, [chunk, controller]);128 return transformPromise.then(129 () => {130 transformStream._transforming = false;131 return TransformStreamReadableReadyPromise(transformStream);132 },133 e => {134 TransformStreamErrorIfNeeded(transformStream, e);135 return Promise.reject(e);136 });137}138function IsTransformStreamDefaultController(x) {139 if (!typeIsObject(x)) {140 return false;141 }142 if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {143 return false;144 }145 return true;146}147function IsTransformStream(x) {148 if (!typeIsObject(x)) {149 return false;150 }151 if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {152 return false;153 }154 return true;155}156class TransformStreamSink {157 constructor(transformStream, startPromise) {158 this._transformStream = transformStream;159 this._startPromise = startPromise;160 }161 start(c) {162 const transformStream = this._transformStream;163 transformStream._writableController = c;164 return this._startPromise.then(() => TransformStreamReadableReadyPromise(transformStream));165 }166 write(chunk) {167 // console.log('TransformStreamSink.write()');168 const transformStream = this._transformStream;169 return TransformStreamTransform(transformStream, chunk);170 }171 abort() {172 const transformStream = this._transformStream;173 transformStream._writableDone = true;174 TransformStreamErrorInternal(transformStream, new TypeError('Writable side aborted'));175 }176 close() {177 // console.log('TransformStreamSink.close()');178 const transformStream = this._transformStream;179 assert(transformStream._transforming === false);180 transformStream._writableDone = true;181 const flushPromise = PromiseInvokeOrNoop(transformStream._transformer,182 'flush', [transformStream._transformStreamController]);183 // Return a promise that is fulfilled with undefined on success.184 return flushPromise.then(() => {185 if (transformStream._errored === true) {186 return Promise.reject(transformStream._storedError);187 }188 if (transformStream._readableClosed === false) {189 TransformStreamCloseReadableInternal(transformStream);190 }191 return Promise.resolve();192 }).catch(r => {193 TransformStreamErrorIfNeeded(transformStream, r);194 return Promise.reject(transformStream._storedError);195 });196 }197}198class TransformStreamSource {199 constructor(transformStream, startPromise) {200 this._transformStream = transformStream;201 this._startPromise = startPromise;202 }203 start(c) {204 const transformStream = this._transformStream;205 transformStream._readableController = c;206 return this._startPromise.then(() => {207 // Prevent the first pull() call until there is backpressure.208 assert(transformStream._backpressureChangePromise !== undefined,209 '_backpressureChangePromise should have been initialized');210 if (transformStream._backpressure === true) {211 return Promise.resolve();212 }213 assert(transformStream._backpressure === false, '_backpressure should have been initialized');214 return transformStream._backpressureChangePromise;215 });216 }217 pull() {218 // console.log('TransformStreamSource.pull()');219 const transformStream = this._transformStream;220 // Invariant. Enforced by the promises returned by start() and pull().221 assert(transformStream._backpressure === true, 'pull() should be never called while _backpressure is false');222 assert(transformStream._backpressureChangePromise !== undefined,223 '_backpressureChangePromise should have been initialized');224 TransformStreamSetBackpressure(transformStream, false);225 // Prevent the next pull() call until there is backpressure.226 return transformStream._backpressureChangePromise;227 }228 cancel() {229 const transformStream = this._transformStream;230 transformStream._readableClosed = true;231 TransformStreamErrorInternal(transformStream, new TypeError('Readable side canceled'));232 }233}234class TransformStreamDefaultController {235 constructor(transformStream) {236 if (IsTransformStream(transformStream) === false) {237 throw new TypeError('TransformStreamDefaultController can only be ' +238 'constructed with a TransformStream instance');239 }240 if (transformStream._transformStreamController !== undefined) {241 throw new TypeError('TransformStreamDefaultController instances can ' +242 'only be created by the TransformStream constructor');243 }244 this._controlledTransformStream = transformStream;245 }246 get desiredSize() {247 if (IsTransformStreamDefaultController(this) === false) {248 throw defaultControllerBrandCheckException('desiredSize');249 }250 const transformStream = this._controlledTransformStream;251 const readableController = transformStream._readableController;252 return ReadableStreamDefaultControllerGetDesiredSize(readableController);253 }254 enqueue(chunk) {255 if (IsTransformStreamDefaultController(this) === false) {256 throw defaultControllerBrandCheckException('enqueue');257 }258 TransformStreamEnqueueToReadable(this._controlledTransformStream, chunk);259 }260 close() {261 if (IsTransformStreamDefaultController(this) === false) {262 throw defaultControllerBrandCheckException('close');263 }264 TransformStreamCloseReadable(this._controlledTransformStream);265 }266 error(reason) {267 if (IsTransformStreamDefaultController(this) === false) {268 throw defaultControllerBrandCheckException('error');269 }270 TransformStreamError(this._controlledTransformStream, reason);271 }272}273class TransformStream {274 constructor(transformer = {}) {275 this._transformer = transformer;276 const { readableStrategy, writableStrategy } = transformer;277 this._transforming = false;278 this._errored = false;279 this._storedError = undefined;280 this._writableController = undefined;281 this._readableController = undefined;282 this._transformStreamController = undefined;283 this._writableDone = false;284 this._readableClosed = false;285 this._backpressure = undefined;286 this._backpressureChangePromise = undefined;287 this._backpressureChangePromise_resolve = undefined;288 this._transformStreamController = new TransformStreamDefaultController(this);289 let startPromise_resolve;290 const startPromise = new Promise(resolve => {291 startPromise_resolve = resolve;292 });293 const source = new TransformStreamSource(this, startPromise);294 this._readable = new ReadableStream(source, readableStrategy);295 const sink = new TransformStreamSink(this, startPromise);296 this._writable = new WritableStream(sink, writableStrategy);297 assert(this._writableController !== undefined);298 assert(this._readableController !== undefined);299 const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(this._readableController);300 // Set _backpressure based on desiredSize. As there is no read() at this point, we can just interpret301 // desiredSize being non-positive as backpressure.302 TransformStreamSetBackpressure(this, desiredSize <= 0);303 const transformStream = this;304 const startResult = InvokeOrNoop(transformer, 'start',305 [transformStream._transformStreamController]);306 startPromise_resolve(startResult);307 startPromise.catch(e => {308 // The underlyingSink and underlyingSource will error the readable and writable ends on their own.309 if (transformStream._errored === false) {310 transformStream._errored = true;311 transformStream._storedError = e;312 }313 });...
transform-stream-polyfill.js
Source:transform-stream-polyfill.js
...34 transformStream._readableClosed = true;35 TransformStreamErrorIfNeeded(transformStream, e);36 throw transformStream._storedError;37 }38 const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);39 const maybeBackpressure = desiredSize <= 0;40 if (maybeBackpressure === true && transformStream._backpressure === false) {41 // This allows pull() again. When desiredSize is 0, it's possible that a pull() will happen immediately (but42 // asynchronously) after this because of pending read()s and set _backpressure back to false.43 //44 // If pull() could be called from inside enqueue(), then this logic would be wrong. This cannot happen45 // because there is always a promise pending from start() or pull() when _backpressure is false.46 TransformStreamSetBackpressure(transformStream, true);47 }48}49function TransformStreamError(transformStream, e) {50 if (transformStream._errored === true) {51 throw new TypeError('TransformStream is already errored');52 }53 TransformStreamErrorInternal(transformStream, e);54}55// Abstract operations.56function TransformStreamCloseReadableInternal(transformStream) {57 ReadableStreamDefaultControllerClose(transformStream._readableController);58 transformStream._readableClosed = true;59}60function TransformStreamErrorIfNeeded(transformStream, e) {61 if (transformStream._errored === false) {62 TransformStreamErrorInternal(transformStream, e);63 }64}65function TransformStreamErrorInternal(transformStream, e) {66 transformStream._errored = true;67 transformStream._storedError = e;68 if (transformStream._writableDone === false) {69 WritableStreamDefaultControllerError(transformStream._writableController, e);70 }71 if (transformStream._readableClosed === false) {72 ReadableStreamDefaultControllerError(transformStream._readableController, e);73 }74}75// Used for preventing the next write() call on TransformStreamSink until there76// is no longer backpressure.77function TransformStreamReadableReadyPromise(transformStream) {78 if (transformStream._backpressure === false) {79 return Promise.resolve();80 }81 return transformStream._backpressureChangePromise;82}83function TransformStreamSetBackpressure(transformStream, backpressure) {84 // Passes also when called during construction.85 if (transformStream._backpressureChangePromise !== undefined) {86 // The fulfillment value is just for a sanity check.87 transformStream._backpressureChangePromise_resolve(backpressure);88 }89 transformStream._backpressureChangePromise = new Promise(resolve => {90 transformStream._backpressureChangePromise_resolve = resolve;91 });92 transformStream._backpressureChangePromise.then(resolution => {93 });94 transformStream._backpressure = backpressure;95}96function TransformStreamDefaultTransform(chunk, transformStreamController) {97 const transformStream = transformStreamController._controlledTransformStream;98 TransformStreamEnqueueToReadable(transformStream, chunk);99 return Promise.resolve();100}101function TransformStreamTransform(transformStream, chunk) {102 transformStream._transforming = true;103 const transformer = transformStream._transformer;104 const controller = transformStream._transformStreamController;105 const transformPromise = PromiseInvokeOrPerformFallback(transformer, 'transform', [chunk, controller],106 TransformStreamDefaultTransform, [chunk, controller]);107 return transformPromise.then(108 () => {109 transformStream._transforming = false;110 return TransformStreamReadableReadyPromise(transformStream);111 },112 e => {113 TransformStreamErrorIfNeeded(transformStream, e);114 return Promise.reject(e);115 });116}117function IsTransformStreamDefaultController(x) {118 if (!typeIsObject(x)) {119 return false;120 }121 if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {122 return false;123 }124 return true;125}126function IsTransformStream(x) {127 if (!typeIsObject(x)) {128 return false;129 }130 if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {131 return false;132 }133 return true;134}135class TransformStreamSink {136 constructor(transformStream, startPromise) {137 this._transformStream = transformStream;138 this._startPromise = startPromise;139 }140 start(c) {141 const transformStream = this._transformStream;142 transformStream._writableController = c;143 return this._startPromise.then(() => TransformStreamReadableReadyPromise(transformStream));144 }145 write(chunk) {146 const transformStream = this._transformStream;147 return TransformStreamTransform(transformStream, chunk);148 }149 abort() {150 const transformStream = this._transformStream;151 transformStream._writableDone = true;152 TransformStreamErrorInternal(transformStream, new TypeError('Writable side aborted'));153 }154 close() {155 const transformStream = this._transformStream;156 transformStream._writableDone = true;157 const flushPromise = PromiseInvokeOrNoop(transformStream._transformer,158 'flush', [transformStream._transformStreamController]);159 // Return a promise that is fulfilled with undefined on success.160 return flushPromise.then(() => {161 if (transformStream._errored === true) {162 return Promise.reject(transformStream._storedError);163 }164 if (transformStream._readableClosed === false) {165 TransformStreamCloseReadableInternal(transformStream);166 }167 return Promise.resolve();168 }).catch(r => {169 TransformStreamErrorIfNeeded(transformStream, r);170 return Promise.reject(transformStream._storedError);171 });172 }173}174class TransformStreamSource {175 constructor(transformStream, startPromise) {176 this._transformStream = transformStream;177 this._startPromise = startPromise;178 }179 start(c) {180 const transformStream = this._transformStream;181 transformStream._readableController = c;182 return this._startPromise.then(() => {183 // Prevent the first pull() call until there is backpressure.184 if (transformStream._backpressure === true) {185 return Promise.resolve();186 }187 return transformStream._backpressureChangePromise;188 });189 }190 pull() {191 const transformStream = this._transformStream;192 // Invariant. Enforced by the promises returned by start() and pull().193 TransformStreamSetBackpressure(transformStream, false);194 // Prevent the next pull() call until there is backpressure.195 return transformStream._backpressureChangePromise;196 }197 cancel() {198 const transformStream = this._transformStream;199 transformStream._readableClosed = true;200 TransformStreamErrorInternal(transformStream, new TypeError('Readable side canceled'));201 }202}203class TransformStreamDefaultController {204 constructor(transformStream) {205 if (IsTransformStream(transformStream) === false) {206 throw new TypeError('TransformStreamDefaultController can only be ' +207 'constructed with a TransformStream instance');208 }209 if (transformStream._transformStreamController !== undefined) {210 throw new TypeError('TransformStreamDefaultController instances can ' +211 'only be created by the TransformStream constructor');212 }213 this._controlledTransformStream = transformStream;214 }215 get desiredSize() {216 if (IsTransformStreamDefaultController(this) === false) {217 throw defaultControllerBrandCheckException('desiredSize');218 }219 const transformStream = this._controlledTransformStream;220 const readableController = transformStream._readableController;221 return ReadableStreamDefaultControllerGetDesiredSize(readableController);222 }223 enqueue(chunk) {224 if (IsTransformStreamDefaultController(this) === false) {225 throw defaultControllerBrandCheckException('enqueue');226 }227 TransformStreamEnqueueToReadable(this._controlledTransformStream, chunk);228 }229 close() {230 if (IsTransformStreamDefaultController(this) === false) {231 throw defaultControllerBrandCheckException('close');232 }233 TransformStreamCloseReadable(this._controlledTransformStream);234 }235 error(reason) {236 if (IsTransformStreamDefaultController(this) === false) {237 throw defaultControllerBrandCheckException('error');238 }239 TransformStreamError(this._controlledTransformStream, reason);240 }241}242class TransformStream {243 constructor(transformer = {}) {244 this._transformer = transformer;245 const { readableStrategy, writableStrategy } = transformer;246 this._transforming = false;247 this._errored = false;248 this._storedError = undefined;249 this._writableController = undefined;250 this._readableController = undefined;251 this._transformStreamController = undefined;252 this._writableDone = false;253 this._readableClosed = false;254 this._backpressure = undefined;255 this._backpressureChangePromise = undefined;256 this._backpressureChangePromise_resolve = undefined;257 this._transformStreamController = new TransformStreamDefaultController(this);258 let startPromise_resolve;259 const startPromise = new Promise(resolve => {260 startPromise_resolve = resolve;261 });262 const source = new TransformStreamSource(this, startPromise);263 this._readable = new ReadableStream(source, readableStrategy);264 const sink = new TransformStreamSink(this, startPromise);265 this._writable = new WritableStream(sink, writableStrategy);266 const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(this._readableController);267 // Set _backpressure based on desiredSize. As there is no read() at this point, we can just interpret268 // desiredSize being non-positive as backpressure.269 TransformStreamSetBackpressure(this, desiredSize <= 0);270 const transformStream = this;271 const startResult = InvokeOrNoop(transformer, 'start',272 [transformStream._transformStreamController]);273 startPromise_resolve(startResult);274 startPromise.catch(e => {275 // The underlyingSink and underlyingSource will error the readable and writable ends on their own.276 if (transformStream._errored === false) {277 transformStream._errored = true;278 transformStream._storedError = e;279 }280 });281 }282 get readable() {283 if (IsTransformStream(this) === false) {284 throw streamBrandCheckException('readable');285 }286 return this._readable;287 }288 get writable() {289 if (IsTransformStream(this) === false) {290 throw streamBrandCheckException('writable');291 }292 return this._writable;293 }294}295// Helper functions for the TransformStreamDefaultController.296function defaultControllerBrandCheckException(name) {297 return new TypeError(298 `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);299}300// Stubs for abstract operations used from ReadableStream and WritableStream.301function ReadableStreamDefaultControllerEnqueue(controller, chunk) {302 controller.enqueue(chunk);303}304function ReadableStreamDefaultControllerGetDesiredSize(controller) {305 return controller.desiredSize;306}307function ReadableStreamDefaultControllerClose(controller) {308 controller.close();309}310function ReadableStreamDefaultControllerError(controller, e) {311 controller.error(e);312}313function WritableStreamDefaultControllerError(controller, e) {314 controller.error(e);315}316// Helper functions for the TransformStream.317function streamBrandCheckException(name) {318 return new TypeError(...
transform_stream_default_controller.ts
Source:transform_stream_default_controller.ts
1// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.2import {3 FlushAlgorithm,4 isTransformStreamDefaultController,5 readableStreamDefaultControllerGetDesiredSize,6 setFunctionName,7 TransformAlgorithm,8 transformStreamDefaultControllerEnqueue,9 transformStreamDefaultControllerError,10 transformStreamDefaultControllerTerminate,11} from "./internals.ts";12import { ReadableStreamDefaultControllerImpl } from "./readable_stream_default_controller.ts";13import * as sym from "./symbols.ts";14import { TransformStreamImpl } from "./transform_stream.ts";15import { customInspect } from "../console.ts";16// eslint-disable-next-line @typescript-eslint/no-explicit-any17export class TransformStreamDefaultControllerImpl<I = any, O = any>18 implements TransformStreamDefaultController<O> {19 [sym.controlledTransformStream]: TransformStreamImpl<I, O>;20 [sym.flushAlgorithm]: FlushAlgorithm;21 [sym.transformAlgorithm]: TransformAlgorithm<I>;22 private constructor() {23 throw new TypeError(24 "TransformStreamDefaultController's constructor cannot be called."25 );26 }27 get desiredSize(): number | null {28 if (!isTransformStreamDefaultController(this)) {29 throw new TypeError("Invalid TransformStreamDefaultController.");30 }31 const readableController = this[sym.controlledTransformStream][32 sym.readable33 ][sym.readableStreamController];34 return readableStreamDefaultControllerGetDesiredSize(35 readableController as ReadableStreamDefaultControllerImpl<O>36 );37 }38 enqueue(chunk: O): void {39 if (!isTransformStreamDefaultController(this)) {40 throw new TypeError("Invalid TransformStreamDefaultController.");41 }42 transformStreamDefaultControllerEnqueue(this, chunk);43 }44 // eslint-disable-next-line @typescript-eslint/no-explicit-any45 error(reason?: any): void {46 if (!isTransformStreamDefaultController(this)) {47 throw new TypeError("Invalid TransformStreamDefaultController.");48 }49 transformStreamDefaultControllerError(this, reason);50 }51 terminate(): void {52 if (!isTransformStreamDefaultController(this)) {53 throw new TypeError("Invalid TransformStreamDefaultController.");54 }55 transformStreamDefaultControllerTerminate(this);56 }57 [customInspect](): string {58 return `${this.constructor.name} { desiredSize: ${String(59 this.desiredSize60 )} }`;61 }62}63setFunctionName(64 TransformStreamDefaultControllerImpl,65 "TransformStreamDefaultController"...
Using AI Code Generation
1import { ReadableStream, ReadableStreamDefaultControllerGetDesiredSize } from 'streams';2const rs = new ReadableStream({3 start(controller) {4 controller.enqueue('a');5 controller.enqueue('b');6 controller.enqueue('c');7 console.log(ReadableStreamDefaultControllerGetDesiredSize(controller));8 }9});10rs.getReader().read().then(result => {11 console.log(result);12 return rs.getReader().read();13}).then(result => {14 console.log(result);15 return rs.getReader().read();16}).then(result => {17 console.log(result);18 return rs.getReader().read();19}).then(result => {20 console.log(result);21});22import { ReadableStream } from 'streams';23const rs = new ReadableStream({24 start(controller) {25 controller.enqueue('a');26 controller.enqueue('b');27 controller.enqueue('c');28 console.log(controller.desiredSize);29 }30});31rs.getReader().read().then(result => {32 console.log(result);33 return rs.getReader().read();34}).then(result => {35 console.log(result);36 return rs.getReader().read();37}).then(result => {38 console.log(result);39 return rs.getReader().read();40}).then(result => {41 console.log(result);42});43import { ReadableStream } from 'streams';44const rs = new ReadableStream({45 start(controller) {46 controller.enqueue('a');47 controller.enqueue('b');48 controller.enqueue('c');49 console.log(controller.desiredSize);
Using AI Code Generation
1test(() => {2 let rs = new ReadableStream({3 start(controller) {4 assert_equals(controller.desiredSize, 1);5 controller.enqueue('a');6 assert_equals(controller.desiredSize, 0);7 controller.enqueue('b');8 assert_equals(controller.desiredSize, -1);9 controller.close();10 assert_equals(controller.desiredSize, 0);11 }12 });13}, 'ReadableStreamDefaultController.desiredSize should be correct');14test(() => {15 let rs = new ReadableStream({16 start(controller) {17 controller.close();18 assert_throws(new TypeError(), () => controller.close());19 }20 });21}, 'ReadableStreamDefaultController.close should throw if the stream is already closed');22test(() => {23 let rs = new ReadableStream({24 start(controller) {25 controller.enqueue('a');26 assert_throws(new TypeError(), () => controller.enqueue('b'));27 }28 });29}, 'ReadableStreamDefaultController.enqueue should throw if the stream is already closed');30test(() => {31 let rs = new ReadableStream({32 start(controller) {33 controller.error();34 assert_throws(new TypeError(), () => controller.error());35 }36 });37}, 'ReadableStreamDefaultController.error should throw if the stream is already errored');38test(() => {39 let rs = new ReadableStream({40 start(controller) {41 controller.error();42 assert_throws(new TypeError(), () => controller.error());43 }44 });45}, 'ReadableStreamDefaultController.error should throw if the stream is already errored');46test(() => {47 let rs = new ReadableStream({48 start(controller) {49 controller.error();50 assert_throws(new TypeError(), () => controller.error());51 }52 });53}, 'ReadableStreamDefaultController.error should throw if the stream is already errored');
Using AI Code Generation
1test(function() {2 const rs = new ReadableStream({3 start(controller) {4 assert_equals(controller.desiredSize, 1, 'desiredSize should be 1');5 },6 });7}, 'ReadableStreamDefaultControllerGetDesiredSize method should return the desired size');8test(function() {9 const rs = new ReadableStream({10 start(controller) {11 assert_equals(controller.desiredSize, 1, 'desiredSize should be 1');12 },13 });14}, 'ReadableStreamDefaultControllerGetDesiredSize method should return the desired size');15test(function() {16 const rs = new ReadableStream({17 start(controller) {18 assert_equals(controller.desiredSize, 1, 'desiredSize should be 1');19 },20 });21}, 'ReadableStreamDefaultControllerGetDesiredSize method should return the desired size');22test(function() {23 const rs = new ReadableStream({24 start(controller) {25 assert_equals(controller.desiredSize, 1, 'desiredSize should be 1');26 },27 });28}, 'ReadableStreamDefaultControllerGetDesiredSize method should return the desired size');29test(function() {30 const rs = new ReadableStream({31 start(controller) {32 assert_equals(controller.desiredSize, 1, 'desiredSize should be 1');33 },34 });35}, 'ReadableStreamDefaultControllerGetDesiredSize method should return the desired size');36test(function() {37 const rs = new ReadableStream({38 start(controller) {39 assert_equals(controller.desiredSize, 1, 'desiredSize should be 1');40 },41 });42}, 'ReadableStreamDefaultControllerGetDesiredSize method should return the desired size');43test(function() {
Using AI Code Generation
1 var rs = new ReadableStream({2 start(c) {3 var desiredSize = c.desiredSize;4 assert_equals(desiredSize, 1, 'The initial desired size should be 1');5 }6 });7 var reader = rs.getReader();8 var chunk = new Uint8Array([0x61]);9 reader.read().then(function(result) {10 assert_equals(result.value, chunk, 'The chunk read should be the same one written');11 assert_false(result.done, 'done');12 });13 reader.releaseLock();14 rs.cancel();15 rs = new ReadableStream({16 start(c) {17 c.enqueue(chunk);18 var desiredSize = c.desiredSize;19 assert_equals(desiredSize, 0, 'The desired size should be 0 after enqueueing a chunk');20 }21 });22 reader = rs.getReader();23 reader.read().then(function(result) {24 assert_equals(result.value, chunk, 'The chunk read should be the same one written');25 assert_false(result.done, 'done');26 });27 reader.releaseLock();28 rs.cancel();29 rs = new ReadableStream({30 start(c) {31 c.enqueue(chunk);32 c.close();33 var desiredSize = c.desiredSize;34 assert_equals(desiredSize, 0, 'The desired size should be 0 after enqueueing a chunk and closing');35 }36 });37 reader = rs.getReader();38 reader.read().then(function(result) {39 assert_equals(result.value, chunk, 'The chunk read should be the same one written');40 assert_false(result.done, 'done');41 });42 reader.releaseLock();43 rs.cancel();44 rs = new ReadableStream({45 start(c) {46 c.enqueue(chunk);47 c.error();48 var desiredSize = c.desiredSize;49 assert_equals(desiredSize, 0, 'The desired size should be 0 after enqueueing a chunk and erroring');50 }51 });52 reader = rs.getReader();53 reader.read().then(function(result) {54 assert_equals(result.value, chunk, 'The chunk read should be the same one written');55 assert_false(result.done, 'done');56 });57 reader.releaseLock();58 rs.cancel();59 rs = new ReadableStream({60 start(c) {61 c.enqueue(chunk);62 c.error(new Error('boo'));
Using AI Code Generation
1var rs = new ReadableStream({2 start: function (controller) {3 controller.enqueue(new Uint8Array([0x01, 0x02]));4 controller.close();5 }6});7var reader = rs.getReader();8var controller = reader._readableStreamController;9var desiredSize = controller.desiredSize;10assert_equals(desiredSize, 2, 'The desired size must be 2');11reader.releaseLock();12var rs = new ReadableStream({13 start: function (controller) {14 controller.enqueue(new Uint8Array([0x01, 0x02]));15 controller.close();16 }17});18var reader = rs.getReader();19var controller = reader._readableStreamController;20var desiredSize = controller.desiredSize;21assert_equals(desiredSize, 2, 'The desired size must be 2');22reader.releaseLock();23var rs = new ReadableStream({24 start: function (controller) {25 controller.enqueue(new Uint8Array([0x01, 0x02]));26 controller.close();27 }28});29var reader = rs.getReader();30var controller = reader._readableStreamController;31var desiredSize = controller.desiredSize;32assert_equals(desiredSize, 2, 'The desired size must be 2');33reader.releaseLock();34var rs = new ReadableStream({35 start: function (controller) {
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- Jest Tutorial
- Playwright Tutorial
- Cypress Tutorial
- PyTest Tutorial
YouTube
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
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