How to use TransformStreamErrorIfNeeded method in wpt

Best JavaScript code snippet using wpt

transform-stream.js

Source:transform-stream.js

...32  } catch (e) {33    // This happens when readableStrategy.size() throws.34    // The ReadableStream has already errored itself.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....

transform-stream-polyfill.js

Source:transform-stream-polyfill.js

...31  } catch (e) {32    // This happens when readableStrategy.size() throws.33    // The ReadableStream has already errored itself.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....

Using AI Code Generation

1var ts = new TransformStream();2var writer = ts.writable.getWriter();3writer.write("a");4writer.write("b");5writer.write("c");6writer.write("d");7writer.write("e");8writer.write("f");9writer.write("g");10writer.write("h");11writer.write("i");12writer.write("j");13writer.write("k");14writer.write("l");15writer.write("m");16writer.write("n");17writer.write("o");18writer.write("p");19writer.write("q");20writer.write("r");21writer.write("s");22writer.write("t");23writer.write("u");24writer.write("v");25writer.write("w");26writer.write("x");27writer.write("y");28writer.write("z");29writer.write("A");30writer.write("B");31writer.write("C");32writer.write("D");33writer.write("E");34writer.write("F");35writer.write("G");36writer.write("H");37writer.write("I");38writer.write("J");39writer.write("K");40writer.write("L");41writer.write("M");42writer.write("N");43writer.write("O");44writer.write("P");45writer.write("Q");46writer.write("R");47writer.write("S");48writer.write("T");49writer.write("U");50writer.write("V");51writer.write("W");52writer.write("X");53writer.write("Y");54writer.write("Z");55writer.write("0");56writer.write("1");57writer.write("2");58writer.write("3");59writer.write("4");60writer.write("5");61writer.write("6");62writer.write("7");63writer.write("8");64writer.write("9");65writer.write("!");66writer.write("@");67writer.write("#");68writer.write("$");69writer.write("%");70writer.write("^");71writer.write("&");72writer.write("*");73writer.write("(");74writer.write(")");75writer.write("-");76writer.write("_");77writer.write("+");78writer.write("=");79writer.write("`");80writer.write("~");81writer.write("'");82writer.write('"');83writer.write(";");84writer.write(":");85writer.write("/");86writer.write("?");87writer.write(">");88writer.write("<");89writer.write(",");90writer.write(".");91writer.write("[");92writer.write("]");93writer.write("{");94writer.write("}");95writer.write("\\");96writer.write("|");97writer.write(" ");98writer.close();99var reader = ts.readable.getReader();100reader.read().then(function(result) {101  assert_equals(result.value, "a");102  return reader.read();103}).then(function(result) {104  assert_equals(result.value

Using AI Code Generation

1import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';2import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';3import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';4import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';5import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';6import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';7import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';8import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';9import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';10import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';11import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';12import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';13import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';14import { TransformStreamErrorIfNeeded } from '/streams/resources/transform-stream-error-if-needed.js';15import { TransformStreamErrorIfNeeded } from

Using AI Code Generation

1var t = new TransformStream();2var writer = t.writable.getWriter();3var reader = t.readable.getReader();4writer.write('a');5writer.close();6reader.read().then(function(result) {7    assert_equals(result.value, 'a');8    assert_equals(result.done, false);9    return reader.read();10}).then(function(result) {11    assert_equals(result.value, undefined);12    assert_equals(result.done, true);13    t.readable.cancel();14    t.writable.abort();15    t.readable.getReader().closed.then(function() {16        done();17    });18}).catch(unreached_rejection(t));19var t = new TransformStream();

Using AI Code Generation

1var t = new TransformStream();2var writer = t.writable.getWriter();3writer.write("a");4writer.write("b");5writer.close();6writer.write("c");7var reader = t.readable.getReader();8reader.read().then(function(result) {9  console.log(result.value);10  return reader.read();11}).then(function(result) {12  console.log(result.value);13  return reader.read();14}).then(function(result) {15  console.log(result.done);16});

Using AI Code Generation

1const { TransformStream } = require("stream/web");2const ts = new TransformStream({3  transform(chunk, controller) {4    controller.enqueue(chunk);5  },6});7ts.readable.pipeTo(ts.writable);8ts.readable.cancel();

Using AI Code Generation

1importScripts("TransformStreamErrorIfNeeded.js");2var t = new TransformStream();3t.writable.write(1);4t.writable.write(2);5t.writable.write(3);6t.writable.write(4);7t.writable.write(5);8t.writable.write(6);9t.writable.write(7);10t.writable.write(8);11t.writable.write(9);12t.writable.write(10);13t.writable.write(11);14t.writable.write(12);15t.writable.write(13);16t.writable.write(14);17t.writable.write(15);18t.writable.write(16);19t.writable.write(17);20t.writable.write(18);21t.writable.write(19);22t.writable.write(20);23t.writable.write(21);24t.writable.write(22);25t.writable.write(23);26t.writable.write(24);27t.writable.write(25);28t.writable.write(26);29t.writable.write(27);30t.writable.write(28);31t.writable.write(29);32t.writable.write(30);33t.writable.write(31);34t.writable.write(32);35t.writable.write(33);36t.writable.write(34);37t.writable.write(35);38t.writable.write(36);39t.writable.write(37);40t.writable.write(38);41t.writable.write(39);42t.writable.write(40);43t.writable.write(41);44t.writable.write(42);45t.writable.write(43);46t.writable.write(44);47t.writable.write(45);48t.writable.write(46);49t.writable.write(47);50t.writable.write(48);51t.writable.write(49);52t.writable.write(50);53t.writable.write(51);54t.writable.write(52);55t.writable.write(53);56t.writable.write(54);57t.writable.write(55);58t.writable.write(56);59t.writable.write(57);60t.writable.write(58);61t.writable.write(59);62t.writable.write(60);63t.writable.write(61);64t.writable.write(62);65t.writable.write(63);66t.writable.write(64);67t.writable.write(65);68t.writable.write(66);69t.writable.write(67);70t.writable.write(68);71t.writable.write(69

Using AI Code Generation

1import {TransformStreamErrorIfNeeded} from "./wpt/resources/testharness.js";2import {TransformStream} from "./wpt/resources/testharness.js";3import {ReadableStream} from "./wpt/resources/testharness.js";4import {WritableStream} from "./wpt/resources/testharness.js";5const {test} = await import("./wpt/resources/testharness.js");6const {promise_rejects} = await import("./wpt/resources/testharness.js");7const {promise_rejects_exactly} = await import("./wpt/resources/testharness.js");8const {promise_rejects_js} = await import("./wpt/resources/testharness.js");9const {promise_rejects_dom} = await import("./wpt/resources/testharness.js");10const {assert_array_equals} = await import("./wpt/resources/testharness.js");11const {assert_equals} = await import("./wpt/resources/testharness.js");12const {assert_true} = await import("./wpt/resources/testharness.js");13const {assert_false} = await import("./wpt/resources/testharness.js");14const {assert_throws} = await import("./wpt/resources/testharness.js");15const {assert_throws_js} = await import("./wpt/resources/testharness.js");16const {assert_throws_exactly} = await import("./wpt/resources/testharness.js");17const {assert_throws_dom} = await import("./wpt/resources/testharness.js");18const {assert_throws_exactly_js} = await import("./wpt/resources/testharness.js");19const {assert_throws_exactly_dom} = await import("./wpt/resources/testharness.js");20const {assert_throws_exactly_type} = await import("./wpt/resources/testharness.js");21const {assert_throws_type} = await import("./wpt/resources/testharness.js");22const {assert_throws_type_dom} = await import("./wpt/resources/testharness.js");23const {assert_throws_type_js} = await import("./wpt/resources/testharness.js");24const {assert_throws_code} = await import("./wpt/resources/testharness.js");25const {assert_throws_code_js} = await import("./wpt/resources/testharness.js");26const {assert_throws_code_dom} = await import("./wpt/resources/testharness.js");27const {assert_throws_code_exactly} =

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.