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How to use TransformStreamSetBackpressure method in wpt

Best JavaScript code snippet using wpt

transform.js

Source:transform.js

...117    // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.118    stream[kBackpressure] = undefined;119    stream[kBackpressureChangePromise] = undefined;120    stream[kBackpressureChangePromiseResolve] = undefined;121    TransformStreamSetBackpressure(stream, true);122    // Used by IsWritableStream() which is called by SetUpTransformStreamDefaultController().123    stream[kTransformStreamController] = undefined;124  }125  function IsTransformStream(x) {126    if (!typeIsObject(x)) {127      return false;128    }129    if (!Object.prototype.hasOwnProperty.call(x, kTransformStreamController)) {130      return false;131    }132    return true;133  }134  // This is a no-op if both sides are already errored.135  function TransformStreamError(stream, e) {136    ReadableStreamDefaultControllerError(stream[kReadable][kReadableStreamController], e);137    TransformStreamErrorWritableAndUnblockWrite(stream, e);138  }139  function TransformStreamErrorWritableAndUnblockWrite(stream, e) {140    TransformStreamDefaultControllerClearAlgorithms(stream[kTransformStreamController]);141    WritableStreamDefaultControllerErrorIfNeeded(stream[kWritable][kWritableStreamController], e);142    if (stream[kBackpressure] === true) {143      // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()144      // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time145      // _backpressure is set.146      TransformStreamSetBackpressure(stream, false);147    }148  }149  function TransformStreamSetBackpressure(stream, backpressure) {150    // Passes also when called during construction.151    assert(stream[kBackpressure] !== backpressure);152    if (stream[kBackpressureChangePromise] !== undefined) {153      stream[kBackpressureChangePromiseResolve]();154    }155    stream[kBackpressureChangePromise] = new Promise((resolve) => {156      stream[kBackpressureChangePromiseResolve] = resolve;157    });158    stream[kBackpressure] = backpressure;159  }160  // Class TransformStreamDefaultController161  class TransformStreamDefaultController {162    constructor() {163      throw new TypeError('TransformStreamDefaultController instances cannot be created directly');164    }165    get desiredSize() {166      if (IsTransformStreamDefaultController(this) === false) {167        throw defaultControllerBrandCheckException('desiredSize');168      }169      const readableController = this[kControlledTransformStream][kReadable][kReadableStreamController];170      return ReadableStreamDefaultControllerGetDesiredSize(readableController);171    }172    enqueue(chunk) {173      if (IsTransformStreamDefaultController(this) === false) {174        throw defaultControllerBrandCheckException('enqueue');175      }176      TransformStreamDefaultControllerEnqueue(this, chunk);177    }178    error(reason) {179      if (IsTransformStreamDefaultController(this) === false) {180        throw defaultControllerBrandCheckException('error');181      }182      TransformStreamDefaultControllerError(this, reason);183    }184    terminate() {185      if (IsTransformStreamDefaultController(this) === false) {186        throw defaultControllerBrandCheckException('terminate');187      }188      TransformStreamDefaultControllerTerminate(this);189    }190  }191  // Transform Stream Default Controller Abstract Operations192  function IsTransformStreamDefaultController(x) {193    if (!typeIsObject(x)) {194      return false;195    }196    if (!Object.prototype.hasOwnProperty.call(x, kControlledTransformStream)) {197      return false;198    }199    return true;200  }201  function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm) {202    assert(IsTransformStream(stream) === true);203    assert(stream[kTransformStreamController] === undefined);204    controller[kControlledTransformStream] = stream;205    stream[kTransformStreamController] = controller;206    controller[kTransformAlgorithm] = transformAlgorithm;207    controller[kFlushAlgorithm] = flushAlgorithm;208  }209  function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) {210    assert(transformer !== undefined);211    const controller = Object.create(TransformStreamDefaultController.prototype);212    let transformAlgorithm = (chunk) => {213      try {214        TransformStreamDefaultControllerEnqueue(controller, chunk);215        return Promise.resolve();216      } catch (transformResultE) {217        return Promise.reject(transformResultE);218      }219    };220    const transformMethod = transformer.transform;221    if (transformMethod !== undefined) {222      if (typeof transformMethod !== 'function') {223        throw new TypeError('transform is not a method');224      }225      transformAlgorithm = (chunk) => {226        const transformPromise = PromiseCall(transformMethod, transformer, [chunk, controller]);227        return transformPromise.catch((e) => {228          TransformStreamError(stream, e);229          throw e;230        });231      };232    }233    const flushAlgorithm = CreateAlgorithmFromUnderlyingMethod(transformer, 'flush', 0, [controller]);234    SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm);235  }236  function TransformStreamDefaultControllerClearAlgorithms(controller) {237    controller[kTransformAlgorithm] = undefined;238    controller[kFlushAlgorithm] = undefined;239  }240  function TransformStreamDefaultControllerEnqueue(controller, chunk) {241    const stream = controller[kControlledTransformStream];242    const readableController = stream[kReadable][kReadableStreamController];243    if (ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController) === false) {244      throw new TypeError('Readable side is not in a state that permits enqueue');245    }246    // We throttle transform invocations based on the backpressure of the ReadableStream, but we still247    // accept TransformStreamDefaultControllerEnqueue() calls.248    try {249      ReadableStreamDefaultControllerEnqueue(readableController, chunk);250    } catch (e) {251      // This happens when readableStrategy.size() throws.252      TransformStreamErrorWritableAndUnblockWrite(stream, e);253      throw stream[kReadable][kStoredError];254    }255    const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);256    if (backpressure !== stream[kBackpressure]) {257      assert(backpressure === true);258      TransformStreamSetBackpressure(stream, true);259    }260  }261  function TransformStreamDefaultControllerError(controller, e) {262    TransformStreamError(controller[kControlledTransformStream], e);263  }264  function TransformStreamDefaultControllerTerminate(controller) {265    const stream = controller[kControlledTransformStream];266    const readableController = stream[kReadable][kReadableStreamController];267    if (ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController) === true) {268      ReadableStreamDefaultControllerClose(readableController);269    }270    const error = new TypeError('TransformStream terminated');271    TransformStreamErrorWritableAndUnblockWrite(stream, error);272  }273  // TransformStreamDefaultSink Algorithms274  function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) {275    assert(stream[kWritable][kState] === 'writable');276    const controller = stream[kTransformStreamController];277    if (stream[kBackpressure] === true) {278      const backpressureChangePromise = stream[kBackpressureChangePromise];279      assert(backpressureChangePromise !== undefined);280      return backpressureChangePromise281        .then(() => {282          const writable = stream[kWritable];283          const state = writable[kState];284          if (state === 'erroring') {285            throw writable[kStoredError];286          }287          assert(state === 'writable');288          return controller[kTransformAlgorithm](chunk);289        });290    }291    return controller[kTransformAlgorithm](chunk);292  }293  function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) {294    // abort() is not called synchronously, so it is possible for abort() to be called when the stream is already295    // errored.296    TransformStreamError(stream, reason);297    return Promise.resolve();298  }299  function TransformStreamDefaultSinkCloseAlgorithm(stream) {300    // stream[kReadable] cannot change after construction, so caching it across a call to user code is safe.301    const readable = stream[kReadable];302    const controller = stream[kTransformStreamController];303    const flushPromise = controller[kFlushAlgorithm]();304    TransformStreamDefaultControllerClearAlgorithms(controller);305    // Return a promise that is fulfilled with undefined on success.306    return flushPromise.then(() => {307      if (readable[kState] === 'errored') {308        throw readable[kStoredError];309      }310      const readableController = readable[kReadableStreamController];311      if (ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController) === true) {312        ReadableStreamDefaultControllerClose(readableController);313      }314    }).catch((r) => {315      TransformStreamError(stream, r);316      throw readable[kStoredError];317    });318  }319  // TransformStreamDefaultSource Algorithms320  function TransformStreamDefaultSourcePullAlgorithm(stream) {321    // Invariant. Enforced by the promises returned by start() and pull().322    assert(stream[kBackpressure] === true);323    assert(stream[kBackpressureChangePromise] !== undefined);324    TransformStreamSetBackpressure(stream, false);325    // Prevent the next pull() call until there is backpressure.326    return stream[kBackpressureChangePromise];327  }328  namespace.CreateTransformStream = CreateTransformStream;329  namespace.TransformStream = TransformStream;330  // Helper functions for the TransformStreamDefaultController.331  function defaultControllerBrandCheckException(name) {332    return new TypeError(333      `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`,334    );335  }336  // Helper functions for the TransformStream.337  function streamBrandCheckException(name) {338    return new TypeError(...

TransformStream.js

Source:TransformStream.js

...72      this[_writable] = new binding.WritableStream(sink, writableStrategy);73      // this[_backpressure] and this[_backpressureChangePromise]] are already74      // undefined, so save a tiny amount of code by not setting them75      // explicitly.76      TransformStreamSetBackpressure(this, true);77      const startResult = CallOrNoop1(transformer, 'start', controller,78                                      'transformer.start');79      resolvePromise(startPromise, startResult);80    }81    get readable() {82      if (!IsTransformStream(this)) {83        throw new TypeError(streamErrors.illegalInvocation);84      }85      return this[_readable];86    }87    get writable() {88      if (!IsTransformStream(this)) {89        throw new TypeError(streamErrors.illegalInvocation);90      }91      return this[_writable];92    }93  }94  function IsTransformStream(x) {95    return hasOwnPropertyNoThrow(x, _transformStreamController);96  }97  function TransformStreamError(stream, e) {98    const readable = stream[_readable];99    if (binding.IsReadableStreamReadable(readable)) {100      binding.ReadableStreamDefaultControllerError(101          binding.getReadableStreamController(readable), e);102    }103    TransformStreamErrorWritableAndUnblockWrite(stream, e);104  }105  function TransformStreamErrorWritableAndUnblockWrite(stream, e) {106    binding.WritableStreamDefaultControllerErrorIfNeeded(107        binding.getWritableStreamController(stream[_writable]), e);108    if (stream[_backpressure]) {109      TransformStreamSetBackpressure(stream, false);110    }111  }112  function TransformStreamSetBackpressure(stream, backpressure) {113    // assert(114    //     stream[_backpressure] !== backpressure,115    //     'stream.[[backpressure]] is not backpressure');116    if (stream[_backpressureChangePromise] !== undefined) {117      resolvePromise(stream[_backpressureChangePromise], undefined);118    }119    stream[_backpressureChangePromise] = v8.createPromise();120    stream[_backpressure] = backpressure;121  }122  class TransformStreamDefaultController {123    constructor(stream) {124      if (!IsTransformStream(stream)) {125        throw new TypeError(streamErrors.illegalConstructor);126      }127      if (stream[_transformStreamController] !== undefined) {128        throw new TypeError(streamErrors.illegalConstructor);129      }130      this[_controlledTransformStream] = stream;131    }132    get desiredSize() {133      if (!IsTransformStreamDefaultController(this)) {134        throw new TypeError(streamErrors.illegalInvocation);135      }136      const readableController = binding.getReadableStreamController(137          this[_controlledTransformStream][_readable]);138      return binding.ReadableStreamDefaultControllerGetDesiredSize(139          readableController);140    }141    enqueue(chunk) {142      if (!IsTransformStreamDefaultController(this)) {143        throw new TypeError(streamErrors.illegalInvocation);144      }145      TransformStreamDefaultControllerEnqueue(this, chunk);146    }147    error(reason) {148      if (!IsTransformStreamDefaultController(this)) {149        throw new TypeError(streamErrors.illegalInvocation);150      }151      TransformStreamDefaultControllerError(this, reason);152    }153    terminate() {154      if (!IsTransformStreamDefaultController(this)) {155        throw new TypeError(streamErrors.illegalInvocation);156      }157      TransformStreamDefaultControllerTerminate(this);158    }159  }160  function IsTransformStreamDefaultController(x) {161    return hasOwnPropertyNoThrow(x, _controlledTransformStream);162  }163  function TransformStreamDefaultControllerEnqueue(controller, chunk) {164    const stream = controller[_controlledTransformStream];165    const readableController =166          binding.getReadableStreamController(stream[_readable]);167    if (!binding.ReadableStreamDefaultControllerCanCloseOrEnqueue(168        readableController)) {169      throw binding.getReadableStreamEnqueueError(stream[_readable]);170    }171    try {172      binding.ReadableStreamDefaultControllerEnqueue(readableController, chunk);173    } catch (e) {174      TransformStreamErrorWritableAndUnblockWrite(stream, e);175      throw binding.getReadableStreamStoredError(stream[_readable]);176    }177    const backpressure = binding.ReadableStreamDefaultControllerHasBackpressure(178        readableController);179    if (backpressure !== stream[_backpressure]) {180      // assert(backpressure, 'backpressure is true');181      TransformStreamSetBackpressure(stream, true);182    }183  }184  function TransformStreamDefaultControllerError(controller, e) {185    TransformStreamError(controller[_controlledTransformStream], e);186  }187  function TransformStreamDefaultControllerTerminate(controller) {188    const stream = controller[_controlledTransformStream];189    const readableController =190          binding.getReadableStreamController(stream[_readable]);191    if (binding.ReadableStreamDefaultControllerCanCloseOrEnqueue(192        readableController)) {193      binding.ReadableStreamDefaultControllerClose(readableController);194    }195    const error = new TypeError(errStreamTerminated);196    TransformStreamErrorWritableAndUnblockWrite(stream, error);197  }198  class TransformStreamDefaultSink {199    constructor(stream, startPromise) {200      this[_ownerTransformStream] = stream;201      this[_startPromise] = startPromise;202    }203    start() {204      const startPromise = this[_startPromise];205      // Permit GC of the promise.206      this[_startPromise] = undefined;207      return startPromise;208    }209    write(chunk) {210      const stream = this[_ownerTransformStream];211      // assert(212      //     binding.isWritableStreamWritable(stream[_writable]),213      //     `stream.[[writable]][[state]] is "writable"`);214      if (stream[_backpressure]) {215        const backpressureChangePromise = stream[_backpressureChangePromise];216        // assert(217        //     backpressureChangePromise !== undefined,218        //     `backpressureChangePromise is not undefined`);219        return thenPromise(backpressureChangePromise, () => {220          const writable = stream[_writable];221          if (binding.isWritableStreamErroring(writable)) {222            throw binding.getWritableStreamStoredError(writable);223          }224          // assert(225          //     binding.isWritableStreamWritable(writable),226          //     `state is "writable"`);227          return TransformStreamDefaultSinkTransform(this, chunk);228        });229      }230      return TransformStreamDefaultSinkTransform(this, chunk);231    }232    abort() {233      const e = new TypeError(errWritableStreamAborted);234      TransformStreamError(this[_ownerTransformStream], e);235    }236    close() {237      const stream = this[_ownerTransformStream];238      const readable = stream[_readable];239      const flushPromise = PromiseCallOrNoop1(240          stream[_transformer], 'flush', stream[_transformStreamController],241          'transformer.flush');242      return thenPromise(243          flushPromise,244          () => {245            if (binding.IsReadableStreamErrored(readable)) {246              throw binding.getReadableStreamStoredError(readable);247            }248            const readableController =249                  binding.getReadableStreamController(readable);250            if (binding.ReadableStreamDefaultControllerCanCloseOrEnqueue(251                readableController)) {252              binding.ReadableStreamDefaultControllerClose(readableController);253            }254          },255          r => {256            TransformStreamError(stream, r);257            throw binding.getReadableStreamStoredError(readable);258          });259    }260  }261  function TransformStreamDefaultSinkInvokeTransform(stream, chunk) {262    const controller = stream[_transformStreamController];263    const transformer = stream[_transformer];264    const method = transformer.transform;265    if (method === undefined) {266      TransformStreamDefaultControllerEnqueue(controller, chunk);267      return undefined;268    }269    if (typeof method !== 'function') {270      throw new TypeError(templateErrorIsNotAFunction('transform'));271    }272    return Function_call(method, transformer, chunk, controller);273  }274  function TransformStreamDefaultSinkTransform(sink, chunk) {275    const stream = sink[_ownerTransformStream];276    // assert(277    //     !binding.IsReadableStreamErrored(stream[_readable]),278    //     'stream.[[readable]].[[state]] is not "errored"');279    // assert(!stream[_backpressure], 'stream.[[backpressure]] is false');280    let transformPromise;281    try {282      transformPromise = Promise_resolve(283          TransformStreamDefaultSinkInvokeTransform(stream, chunk));284    } catch (e) {285      transformPromise = Promise_reject(e);286    }287    return thenPromise(transformPromise, undefined, e => {288      TransformStreamError(stream, e);289      throw e;290    });291  }292  class TransformStreamDefaultSource {293    constructor(stream, startPromise) {294      this[_ownerTransformStream] = stream;295      this[_startPromise] = startPromise;296    }297    start() {298      const startPromise = this[_startPromise];299      // Permit GC of the promise.300      this[_startPromise] = undefined;301      return startPromise;302    }303    pull() {304      const stream = this[_ownerTransformStream];305      // assert(stream[_backpressure], 'stream.[[backpressure]] is true');306      // assert(307      //     stream[_backpressureChangePromise] !== undefined,308      //     'stream.[[backpressureChangePromise]] is not undefined');309      TransformStreamSetBackpressure(stream, false);310      return stream[_backpressureChangePromise];311    }312    cancel(reason) {313      TransformStreamErrorWritableAndUnblockWrite(314          this[_ownerTransformStream], reason);315    }316  }317  //318  // Additions to the global object319  //320  defineProperty(global, 'TransformStream', {321    value: TransformStream,322    enumerable: false,323    configurable: true,...

Using AI Code Generation

1var t = new TransformStream();2var writer = t.writable.getWriter();3var reader = t.readable.getReader();4writer.write('a');5writer.write('b');6writer.write('c');7writer.write('d');8writer.write('e');9writer.write('f');10writer.write('g');11writer.write('h');12writer.write('i');13writer.write('j');14writer.write('k');15writer.write('l');16writer.write('m');17writer.write('n');18writer.write('o');19writer.write('p');20writer.write('q');21writer.write('r');22writer.write('s');23writer.write('t');24writer.write('u');25writer.write('v');26writer.write('w');27writer.write('x');28writer.write('y');29writer.write('z');30writer.close();31reader.read().then(function (result) {32  console.log(result);33});34t.setBackpressure(true);35reader.read().then(function (result) {36  console.log(result);37});38t.setBackpressure(false);

Using AI Code Generation

1var t = async_test("TransformStreamSetBackpressure method");2var ts = new TransformStream();3var writer = ts.writable.getWriter();4var reader = ts.readable.getReader();5var controller;6  .getWriter()7  .closed.then(t.step_func(function() {8    assert_equals(controller.desiredSize, 0, "desiredSize should be 0");9    t.done();10  }));11writer.write("a");12writer.write("b");13writer.write("c");14writer.write("d");15writer.write("e");16writer.write("f");17writer.write("g");18writer.write("h");19writer.write("i");20writer.write("j");21writer.write("k");22writer.write("l");23writer.write("m");24writer.write("n");25writer.write("o");26writer.write("p");27writer.write("q");28writer.write("r");29writer.write("s");30writer.write("t");31writer.write("u");32writer.write("v");33writer.write("w");34writer.write("x");35writer.write("y");36writer.write("z");37  .getWriter()38  .then(t.step_func(function() {39    assert_equals(controller.desiredSize, 0, "desiredSize should be 0");40    writer.close();41  }));42  .getWriter()43  .then(t.step_func(function() {44    assert_equals(controller.desiredSize, 0, "desiredSize should be 0");45    t.done();46  }));47  .getWriter()48  .then(t.step_func(function() {49    assert_equals(controller.desiredSize, 0, "desiredSize should be 0");50    writer.close();51  }));52  .getWriter()53  .then(t.step_func(function() {54    assert_equals(controller.desiredSize, 0, "desiredSize should be 0");55    t.done();56  }));57  .getWriter()58  .then(t.step_func(function() {59    assert_equals(controller.desiredSize, 0, "desiredSize should be 0");60    writer.close();61  }));62  .getWriter()63  .then(t.step_func(function() {64    assert_equals(controller.desiredSize, 0, "desiredSize should be 0");65    t.done();66  }));

Using AI Code Generation

1const { TransformStream } = require('stream/web');2const { WritableStream, ReadableStream } = require('stream/web');3const { TransformStreamSetBackpressure } = require('stream/web');4const { TransformStreamDefaultControllerEnqueue } = require('stream/web');5const { TransformStreamDefaultControllerError } = require('stream/web');6const { TransformStreamDefaultController } = require('stream/web');7const { TransformStreamDefaultControllerTerminate } = require('stream/web');8const { ByteLengthQueuingStrategy } = require('stream/web');9const { CountQueuingStrategy } = require('stream/web');10const { WritableStreamDefaultControllerError } = require('stream/web');11const { WritableStreamDefaultController } = require('stream/web');12const { WritableStreamDefaultControllerClose } = require('stream/web');13const { WritableStreamDefaultControllerGetDesiredSize } = require('stream/web');14const { WritableStreamDefaultControllerHasBackpressure } = require('stream/web');15const { WritableStreamDefaultControllerWrite } = require('stream/web');16const { ReadableStreamDefaultControllerError } = require('stream/web');17const { ReadableStreamDefaultController } = require('stream/web');18const { ReadableStreamDefaultControllerClose } = require('stream/web');19const { ReadableStreamDefaultControllerEnqueue } = require('stream/web');20const { ReadableStreamDefaultControllerGetDesiredSize } = require('stream/web');21const { ReadableStreamBYOBRequest } = require('stream/web');22const { ReadableStreamBYOBReader } = require('stream/web');23const { ReadableStreamDefaultReader } = require('stream/web');24const { ReadableByteStreamControllerClose } = require('stream/web');25const { ReadableByteStreamControllerEnqueue } = require('stream/web');26const { ReadableByteStreamControllerError } = require('stream/web');27const { ReadableByteStreamController } = require('stream/web');28const { ReadableByteStreamControllerGetDesiredSize } = require('stream/web');29const { ReadableStreamBYOBReaderRead } = require('stream/web');30const { ReadableStreamDefaultReaderRead } = require('stream/web');31const { ReadableStreamGetNumReadRequests } = require('stream/web');32const { ReadableStreamGetNumReadIntoRequests } = require('stream/web');33const { ReadableStreamHasBYOBReader } = require('stream/web');

Using AI Code Generation

1var stream = new TransformStream();2var reader = stream.readable.getReader();3var writer = stream.writable.getWriter();4stream.setBackpressure(false);5writer.write('a');6writer.write('b');7writer.write('c');8reader.read().then(({value, done}) => {9  console.log(value);10  return reader.read();11}).then(({value, done}) => {12  console.log(value);13  return reader.read();14}).then(({value, done}) => {15  console.log(value);16  return reader.read();17}).then(({value, done}) => {18  console.log(done);19});

Using AI Code Generation

1var t = new TransformStream();2t.readable.getReader();3t.writable.getWriter();4t.writable.setBackpressure(true);5var t = new TransformStream();6t.readable.getReader();7t.writable.getWriter();8t.writable.setBackpressure(false);9var t = new TransformStream();10t.readable.getReader();11t.writable.getWriter();12t.writable.setBackpressure('true');13var t = new TransformStream();14t.readable.getReader();15t.writable.getWriter();16t.writable.setBackpressure('false');17var t = new TransformStream();18t.readable.getReader();19t.writable.getWriter();20t.writable.setBackpressure('true');21var t = new TransformStream();22t.readable.getReader();23t.writable.getWriter();24t.writable.setBackpressure('false');25var t = new TransformStream();26t.readable.getReader();27t.writable.getWriter();28t.writable.setBackpressure('true');29var t = new TransformStream();30t.readable.getReader();31t.writable.getWriter();32t.writable.setBackpressure('false');33var t = new TransformStream();34t.readable.getReader();35t.writable.getWriter();36t.writable.setBackpressure('true');37var t = new TransformStream();38t.readable.getReader();39t.writable.getWriter();40t.writable.setBackpressure('false');41var t = new TransformStream();42t.readable.getReader();43t.writable.getWriter();44t.writable.setBackpressure('true');45var t = new TransformStream();46t.readable.getReader();47t.writable.getWriter();48t.writable.setBackpressure('false');49var t = new TransformStream();

Using AI Code Generation

1var test = async_test("TransformStream Set Backpressure method");2test.step(function() {3  var ts = new TransformStream();4  assert_equals(ts.setBackpressure(true), undefined, 'setBackpressure(true) should return undefined');5  assert_equals(ts.setBackpressure(false), undefined, 'setBackpressure(false) should return undefined');6  test.done();7});8promise_test(() => {9  const ts = new TransformStream();10  return Promise.all([11    readableStreamToArray(ts.readable),12    writableStreamDefaultWriterClose(ts.writable.getWriter())13  ]);14}, 'setBackpressure() should not throw when the stream is already errored');15promise_test(() => {16  const ts = new TransformStream();17  const writer = ts.writable.getWriter();18  return Promise.all([19    readableStreamToArray(ts.readable),20    writer.write('a'),21    writer.write('b'),22    writer.write('c'),23    writer.write('d'),24    writer.write('e'),25    writer.write('f'),26    writer.write('g'),27    writer.write('h'),28    writer.write('i'),29    writer.write('j'),30    writer.write('k'),31    writer.write('l'),32    writer.write('m'),33    writer.write('n'),34    writer.write('o'),35    writer.write('p'),36    writer.write('q'),37    writer.write('r'),38    writer.write('s'),39    writer.write('t'),40    writer.write('u'),41    writer.write('v'),42    writer.write('w'),43    writer.write('x'),44    writer.write('y'),45    writer.write('z'),46    writer.close()47  ]);48}, 'setBackpressure() should not throw when the stream is already errored');49promise_test(() => {50  const ts = new TransformStream();51  const writer = ts.writable.getWriter();52  return Promise.all([53    readableStreamToArray(ts.readable),54    writer.write('a'),55    writer.write('b'),56    writer.write('c'),57    writer.write('d'),58    writer.write('e'),59    writer.write('f'),60    writer.write('g'),61    writer.write('h'),62    writer.write('i'),63    writer.write('j'),64    writer.write('k'),65    writer.write('l'),66    writer.write('m'),67    writer.write('n'),68    writer.write('o'),

Using AI Code Generation

1assert_equals(typeof TransformStreamSetBackpressure, 'function', 'TransformStreamSetBackpressure should be a function');2assert_equals(TransformStreamSetBackpressure(), undefined, 'TransformStreamSetBackpressure should return undefined');3assert_equals(TransformStreamSetBackpressure(), undefined, 'TransformStreamSetBackpressure should return undefined when called with no arguments');4assert_throws(new TypeError(), TransformStreamSetBackpressure(1), 'TransformStreamSetBackpressure should throw a TypeError when called with 1 argument');5assert_throws(new TypeError(), TransformStreamSetBackpressure(1, 2), 'TransformStreamSetBackpressure should throw a TypeError when called with 2 arguments');6assert_throws(new TypeError(), TransformStreamSetBackpressure(1, 2, 3), 'TransformStreamSetBackpressure should throw a TypeError when called with 3 arguments');7assert_throws(new TypeError(), TransformStreamSetBackpressure(1, 2, 3, 4), 'TransformStreamSetBackpressure should throw a TypeError when called with 4 arguments');8assert_throws(new TypeError(), TransformStreamSetBackpressure(1, 2, 3, 4, 5), 'TransformStreamSetBackpressure should throw a TypeError when called with 5 arguments');9assert_throws(new TypeError(), TransformStreamSetBackpressure(1, 2, 3, 4, 5, 6), 'TransformStreamSetBackpressure should throw a TypeError when called with 6 arguments');10assert_throws(new TypeError(),

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