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How to use ReadableStreamDefaultControllerErrorIfNeeded method in wpt

Best JavaScript code snippet using wpt

readable-stream.js

Source:readable-stream.js

...685        assert(controller._pullAgain === false);686        ReadableStreamDefaultControllerCallPullIfNeeded(controller);687      },688      r => {689        ReadableStreamDefaultControllerErrorIfNeeded(controller, r);690      }691    )692    .catch(rethrowAssertionErrorRejection);693  }694  get desiredSize() {695    if (IsReadableStreamDefaultController(this) === false) {696      throw defaultControllerBrandCheckException('desiredSize');697    }698    return ReadableStreamDefaultControllerGetDesiredSize(this);699  }700  close() {701    if (IsReadableStreamDefaultController(this) === false) {702      throw defaultControllerBrandCheckException('close');703    }704    if (this._closeRequested === true) {705      throw new TypeError('The stream has already been closed; do not close it again!');706    }707    const state = this._controlledReadableStream._state;708    if (state !== 'readable') {709      throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);710    }711    ReadableStreamDefaultControllerClose(this);712  }713  enqueue(chunk) {714    if (IsReadableStreamDefaultController(this) === false) {715      throw defaultControllerBrandCheckException('enqueue');716    }717    if (this._closeRequested === true) {718      throw new TypeError('stream is closed or draining');719    }720    const state = this._controlledReadableStream._state;721    if (state !== 'readable') {722      throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);723    }724    return ReadableStreamDefaultControllerEnqueue(this, chunk);725  }726  error(e) {727    if (IsReadableStreamDefaultController(this) === false) {728      throw defaultControllerBrandCheckException('error');729    }730    const stream = this._controlledReadableStream;731    if (stream._state !== 'readable') {732      throw new TypeError(`The stream is ${stream._state} and so cannot be errored`);733    }734    ReadableStreamDefaultControllerError(this, e);735  }736  [InternalCancel](reason) {737    this._queue = [];738    return PromiseInvokeOrNoop(this._underlyingSource, 'cancel', [reason]);739  }740  [InternalPull]() {741    const stream = this._controlledReadableStream;742    if (this._queue.length > 0) {743      const chunk = DequeueValue(this._queue);744      if (this._closeRequested === true && this._queue.length === 0) {745        ReadableStreamClose(stream);746      } else {747        ReadableStreamDefaultControllerCallPullIfNeeded(this);748      }749      return Promise.resolve(CreateIterResultObject(chunk, false));750    }751    const pendingPromise = ReadableStreamAddReadRequest(stream);752    ReadableStreamDefaultControllerCallPullIfNeeded(this);753    return pendingPromise;754  }755}756// Abstract operations for the ReadableStreamDefaultController.757function IsReadableStreamDefaultController(x) {758  if (!typeIsObject(x)) {759    return false;760  }761  if (!Object.prototype.hasOwnProperty.call(x, '_underlyingSource')) {762    return false;763  }764  return true;765}766function ReadableStreamDefaultControllerCallPullIfNeeded(controller) {767  const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);768  if (shouldPull === false) {769    return undefined;770  }771  if (controller._pulling === true) {772    controller._pullAgain = true;773    return undefined;774  }775  assert(controller._pullAgain === false);776  controller._pulling = true;777  const pullPromise = PromiseInvokeOrNoop(controller._underlyingSource, 'pull', [controller]);778  pullPromise.then(779    () => {780      controller._pulling = false;781      if (controller._pullAgain === true) {782        controller._pullAgain = false;783        return ReadableStreamDefaultControllerCallPullIfNeeded(controller);784      }785      return undefined;786    },787    e => {788      ReadableStreamDefaultControllerErrorIfNeeded(controller, e);789    }790  )791  .catch(rethrowAssertionErrorRejection);792  return undefined;793}794function ReadableStreamDefaultControllerShouldCallPull(controller) {795  const stream = controller._controlledReadableStream;796  if (stream._state === 'closed' || stream._state === 'errored') {797    return false;798  }799  if (controller._closeRequested === true) {800    return false;801  }802  if (controller._started === false) {803    return false;804  }805  if (IsReadableStreamLocked(stream) === true && ReadableStreamGetNumReadRequests(stream) > 0) {806    return true;807  }808  const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);809  if (desiredSize > 0) {810    return true;811  }812  return false;813}814// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.815function ReadableStreamDefaultControllerClose(controller) {816  const stream = controller._controlledReadableStream;817  assert(controller._closeRequested === false);818  assert(stream._state === 'readable');819  controller._closeRequested = true;820  if (controller._queue.length === 0) {821    ReadableStreamClose(stream);822  }823}824function ReadableStreamDefaultControllerEnqueue(controller, chunk) {825  const stream = controller._controlledReadableStream;826  assert(controller._closeRequested === false);827  assert(stream._state === 'readable');828  if (IsReadableStreamLocked(stream) === true && ReadableStreamGetNumReadRequests(stream) > 0) {829    ReadableStreamFulfillReadRequest(stream, chunk, false);830  } else {831    let chunkSize = 1;832    if (controller._strategySize !== undefined) {833      const strategySize = controller._strategySize;834      try {835        chunkSize = strategySize(chunk);836      } catch (chunkSizeE) {837        ReadableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);838        throw chunkSizeE;839      }840    }841    try {842      EnqueueValueWithSize(controller._queue, chunk, chunkSize);843    } catch (enqueueE) {844      ReadableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);845      throw enqueueE;846    }847  }848  ReadableStreamDefaultControllerCallPullIfNeeded(controller);849  return undefined;850}851function ReadableStreamDefaultControllerError(controller, e) {852  const stream = controller._controlledReadableStream;853  assert(stream._state === 'readable');854  controller._queue = [];855  ReadableStreamError(stream, e);856}857function ReadableStreamDefaultControllerErrorIfNeeded(controller, e) {858  if (controller._controlledReadableStream._state === 'readable') {859    ReadableStreamDefaultControllerError(controller, e);860  }861}862function ReadableStreamDefaultControllerGetDesiredSize(controller) {863  const queueSize = GetTotalQueueSize(controller._queue);864  return controller._strategyHWM - queueSize;865}866class ReadableStreamBYOBRequest {867  constructor(controller, view) {868    this._associatedReadableByteStreamController = controller;869    this._view = view;870  }871  get view() {...

Using AI Code Generation

1let rs = new ReadableStream({2  start(controller) {3    controller.enqueue('a');4    controller.enqueue('b');5    controller.enqueue('c');6  }7});8let reader = rs.getReader();9let read = reader.read();10read.then(result => {11  console.log(result.value);12  return reader.read();13})14.then(result => {15  console.log(result.value);16  return reader.read();17})18.then(result => {19  console.log(result.value);20  return reader.read();21})22.then(result => {23  console.log(result.done);24});25let rs = new ReadableStream({26  start(controller) {27    controller.enqueue('a');28    controller.enqueue('b');29    controller.enqueue('c');30  }31});32let reader = rs.getReader();33let read = reader.read();34read.then(result => {35  console.log(result.value);36  return reader.read();37})38.then(result => {39  console.log(result.value);40  return reader.read();41})42.then(result => {43  console.log(result.value);44  return reader.read();45})46.then(result => {47  console.log(result.done);48});49let rs = new ReadableStream({50  start(controller) {51    controller.enqueue('a');52    controller.enqueue('b');53    controller.enqueue('c');54  }55});56let reader = rs.getReader();57let read = reader.read();58read.then(result => {59  console.log(result.value);60  return reader.read();61})62.then(result => {63  console.log(result.value);64  return reader.read();65})66.then(result => {67  console.log(result.value);68  return reader.read();69})70.then(result => {71  console.log(result.done);72});73let rs = new ReadableStream({74  start(controller) {75    controller.enqueue('a');76    controller.enqueue('b');77    controller.enqueue('c');78  }79});80let reader = rs.getReader();81let read = reader.read();82read.then(result => {83  console.log(result.value);

Using AI Code Generation

1import { ReadableStream, ReadableStreamDefaultControllerErrorIfNeeded } from 'streams';2const rs = new ReadableStream({3  start(controller) {4    controller.enqueue("a");5    controller.enqueue("b");6    controller.enqueue("c");7    controller.close();8  }9});10const reader = rs.getReader();11reader.read().then(result1 => {12  console.log(result1);13  return reader.read();14}).then(result2 => {15  console.log(result2);16  return reader.read();17}).then(result3 => {18  console.log(result3);19  return reader.read();20}).then(result4 => {21  console.log(result4);22  return reader.read();23}).then(result5 => {24  console.log(result5);25  return reader.read();26}).then(result6 => {27  console.log(result6);28  return reader.read();29}).then(result7 => {30  console.log(result7);31  return reader.read();32}).then(result8 => {33  console.log(result8);34  return reader.read();35}).then(result9 => {36  console.log(result9);37  return reader.read();38}).then(result10 => {39  console.log(result10);40  return reader.read();41}).then(result11 => {42  console.log(result11);43  return reader.read();44}).then(result12 => {45  console.log(result12);46  return reader.read();47}).then(result13 => {48  console.log(result13);49  return reader.read();50}).then(result14 => {51  console.log(result14);52  return reader.read();53}).then(result15 => {54  console.log(result15);55  return reader.read();56}).then(result16 => {57  console.log(result

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue('a');4    controller.enqueue('b');5    controller.enqueue('c');6    controller.close();7  }8});9var reader = rs.getReader();10reader.read().then(function(result1) {11  assert_equals(result1.value, 'a');12  assert_false(result1.done, 'result1.done');13  return reader.read();14}).then(function(result2) {15  assert_equals(result2.value, 'b');16  assert_false(result2.done, 'result2.done');17  return reader.read();18}).then(function(result3) {19  assert_equals(result3.value, 'c');20  assert_false(result3.done, 'result3.done');21  return reader.read();22}).then(function(result4) {23  assert_equals(result4.value, undefined);24  assert_true(result4.done, 'result4.done');25  return reader.closed;26}).then(function() {27  assert_true(true, 'closed fulfilled');28}, function() {29  assert_true(false, 'closed rejected');30}).then($DONE, $DONE);31promise_test(function(t) {32  var rs = new ReadableStream({33    start(controller) {34      controller.enqueue('a');35      controller.enqueue('b');36      controller.close();37    }38  });39  var reader1 = rs.getReader();40  var reader2 = rs.getReader();41  var read1 = reader1.read();42  var read2 = reader2.read();43  return Promise.all([read1, read2]).then(function(results) {44    var result1 = results[0];45    var result2 = results[1];46    assert_equals(result1.value, 'a');47    assert_false(result1.done, 'result1.done');48    assert_equals(result2.value, 'a');49    assert_false(result2.done, 'result2.done');50    return Promise.all([reader1.closed, reader2.closed]);51  });52}, 'ReadableStream with byte source: teeing a readable stream');53test(() => {54  var theError = new Error('boo!');

Using AI Code Generation

1test(() => {2  const rs = new ReadableStream({3    start(controller) {4      controller.error(new Error('a'));5    },6  });7  const reader = rs.getReader();8  return promise_rejects_exactly(new TypeError(), reader.read(), 'read() should reject with a TypeError');9}, 'ReadableStream with a controller that has already errored should not be able to be read from');10test(() => {11  const rs = new ReadableStream({12    start(controller) {13      controller.error(new Error('a'));14    },15  });16  const reader = rs.getReader();17  return promise_rejects_exactly(new TypeError(), reader.read(), 'read() should reject with a TypeError');18}, 'ReadableStream with a controller that has already errored should not be able to be read from');19test(() => {20  const rs = new ReadableStream({21    start(controller) {22      controller.error(new Error('a'));23    },24  });25  const reader = rs.getReader();26  return promise_rejects_exactly(new TypeError(), reader.read(), 'read() should reject with a TypeError');27}, 'ReadableStream with a controller that has already errored should not be able to be read from');28test(() => {29  const rs = new ReadableStream({30    start(controller) {31      controller.error(new Error('a'));32    },33  });34  const reader = rs.getReader();35  return promise_rejects_exactly(new TypeError(), reader.read(), 'read() should reject with a TypeError');36}, 'ReadableStream with a controller that has already errored should not be able to be read from');37test(() => {38  const rs = new ReadableStream({39    start(controller) {40      controller.error(new Error('a'));41    },42  });43  const reader = rs.getReader();44  return promise_rejects_exactly(new TypeError(), reader.read(), 'read() should reject with a TypeError');45}, 'ReadableStream with a controller that has already errored should not be able to be read from');

Using AI Code Generation

1 * @extends {ReadableByteStreamController}2function ReadableByteStreamController() {}3 * @param {*} e4ReadableByteStreamController.prototype.error = function(e) {};5 * @param {*} e6function ReadableStreamDefaultControllerErrorIfNeeded(controller, e) {}7 * @extends {ReadableStreamDefaultController}8function ReadableStreamDefaultController() {}9 * @param {*} e10ReadableStreamDefaultController.prototype.error = function(e) {};11 * @param {*} e12function ReadableStreamDefaultControllerErrorIfNeeded(controller, e) {}13 * @extends {ReadableStreamBYOBRequest}14function ReadableStreamBYOBRequest() {}15 * @param {number} bytesWritten16ReadableStreamBYOBRequest.prototype.respond = function(bytesWritten) {};17 * @param {*} e18ReadableStreamBYOBRequest.prototype.respondWithNewView = function(e) {};19 * @extends {ReadableStreamDefaultController}20function ReadableStreamBYOBRequest() {}21 * @param {*} e22ReadableStreamBYOBRequest.prototype.error = function(e) {};23 * @param {*} e24function ReadableStreamDefaultControllerErrorIfNeeded(controller, e) {}25 * @extends {ReadableStreamDefaultController}26function ReadableStreamDefaultController() {}27 * @param {*} e28ReadableStreamDefaultController.prototype.error = function(e) {};29 * @param {*} e30function ReadableStreamDefaultControllerErrorIfNeeded(controller, e) {}31 * @extends {ReadableStreamDefaultController}32function ReadableStreamDefaultController() {}33 * @param {*} e34ReadableStreamDefaultController.prototype.error = function(e) {};35 * @param {*} e36function ReadableStreamDefaultControllerErrorIfNeeded(controller, e) {}37 * @extends {ReadableStreamDefaultController}38function ReadableStreamDefaultController() {}39 * @param {*} e40ReadableStreamDefaultController.prototype.error = function(e) {};41 * @param {*} e42function ReadableStreamDefaultControllerErrorIfNeeded(controller, e) {}43 * @extends {ReadableStreamDefaultController}44function ReadableStreamDefaultController() {}45 * @param {*} e46ReadableStreamDefaultController.prototype.error = function(e) {};

Using AI Code Generation

1var t = async_test("ReadableStreamDefaultControllerErrorIfNeeded method");2var rs = new ReadableStream({3  start: function(controller) {4    controller.enqueue("a");5    controller.enqueue("b");6    controller.enqueue("c");7  }8});9var reader = rs.getReader();10var i = 0;11var read = function() {12  reader.read().then(function(result) {13    if (result.done) {14      t.done();15      return;16    }17    if (i === 0) {18      i++;19      controller.error(new Error("something went wrong"));20      return;21    }22    assert_equals(result.value, "b");23    read();24  });25};26read();

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