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How to use TransformStreamCloseReadable method in wpt

Best JavaScript code snippet using wpt

transform-stream.js

Source:transform-stream.js

...5        ReadableStreamDefaultControllerEnqueue, ReadableStreamDefaultControllerError,6        ReadableStreamDefaultControllerGetDesiredSize } = require('./readable-stream.js');7const { WritableStream, WritableStreamDefaultControllerError } = require('./writable-stream.js');8// Methods on the transform stream controller object9function TransformStreamCloseReadable(transformStream) {10  // console.log('TransformStreamCloseReadable()');11  if (transformStream._errored === true) {12    throw new TypeError('TransformStream is already errored');13  }14  if (transformStream._readableClosed === true) {15    throw new TypeError('Readable side is already closed');16  }17  TransformStreamCloseReadableInternal(transformStream);18}19function TransformStreamEnqueueToReadable(transformStream, chunk) {20  // console.log('TransformStreamEnqueueToReadable()');21  if (transformStream._errored === true) {22    throw new TypeError('TransformStream is already errored');23  }24  if (transformStream._readableClosed === true) {25    throw new TypeError('Readable side is already closed');26  }27  // We throttle transformer.transform invocation based on the backpressure of the ReadableStream, but we still28  // accept TransformStreamEnqueueToReadable() calls.29  const controller = transformStream._readableController;30  try {31    ReadableStreamDefaultControllerEnqueue(controller, chunk);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.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;...

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue('a');4    controller.enqueue('b');5    controller.enqueue('c');6  }7});8var ts = new TransformStream({9  start(controller) {10    controller.enqueue('x');11    controller.enqueue('y');12    controller.enqueue('z');13  }14});15var writer = ts.writable.getWriter();16var reader = ts.readable.getReader();17var writerClosed = writer.close();18writerClosed.then(() => {19  return reader.read().then(result => {20    assert_equals(result.value, 'x', 'read() should return the first chunk enqueued to the transform stream');21    assert_false(result.done, 'read() should not return done');22    return reader.read();23  }).then(result => {24    assert_equals(result.value, 'y', 'read() should return the second chunk enqueued to the transform stream');25    assert_false(result.done, 'read() should not return done');26    return reader.read();27  }).then(result => {28    assert_equals(result.value, 'z', 'read() should return the third chunk enqueued to the transform stream');29    assert_false(result.done, 'read() should not return done');30    return reader.read();31  }).then(result => {32    assert_equals(result.value, undefined, 'read() should return undefined');33    assert_true(result.done, 'read() should return done');34  });35});36promise_test(() => {37  return writerClosed;38}, 'writer.close() should not be blocked by the readable side being locked');

Using AI Code Generation

1const rs = new ReadableStream({2    start(c) {3        c.enqueue('a');4        c.enqueue('b');5        c.enqueue('c');6    }7});8const ts = new TransformStream({9    transform(chunk, controller) {10        controller.enqueue(chunk);11    }12});13const writer = ts.writable.getWriter();14writer.write('d');15writer.close();16const reader = ts.readable.getReader();17const writer2 = ts.writable.getWriter();18writer2.write('e');19writer2.close();20const writer3 = ts.writable.getWriter();21writer3.write('f');22writer3.close();23const writer4 = ts.writable.getWriter();24writer4.write('g');25writer4.close();26reader.releaseLock();27const reader2 = ts.readable.getReader();

Using AI Code Generation

1test(() => {2  const ts = new TransformStream();3  TransformStreamCloseReadable(ts);4  assert_true(ts.readable.closed, 'TransformStreamCloseReadable should close the readable side');5}, 'TransformStreamCloseReadable should close the readable side');6test(() => {7  const ts = new TransformStream();8  const writer = ts.writable.getWriter();9  TransformStreamCloseReadable(ts);10  return writer.closed.then(() => {11    assert_unreached('The writer should be errored');12  }, r => {13    assert_equals(r.name, 'TypeError', 'TransformStreamCloseReadable should error the writer');14  });15}, 'TransformStreamCloseReadable should error the writer');16test(() => {17  const ts = new TransformStream();18  const writer = ts.writable.getWriter();19  const reader = ts.readable.getReader();20  TransformStreamCloseReadable(ts);21  return reader.read().then(() => {22    assert_unreached('The reader should be errored');23  }, r => {24    assert_equals(r.name, 'TypeError', 'TransformStreamCloseReadable should error the reader');25  });26}, 'TransformStreamCloseReadable should error the reader');27test(() => {28  const ts = new TransformStream();29  const writer = ts.writable.getWriter();30  const reader = ts.readable.getReader();31  TransformStreamCloseReadable(ts);32  return Promise.all([33    writer.closed.then(() => {34      assert_unreached('The writer should be errored');35    }, r => {36      assert_equals(r.name, 'TypeError', 'TransformStreamCloseReadable should error the writer');37    }),38    reader.read().then(() => {39      assert_unreached('The reader should be errored');40    }, r => {41      assert_equals(r.name, 'TypeError', 'TransformStreamCloseReadable should error the reader');42    })43  ]);44}, 'TransformStreamCloseReadable should error both the reader and the writer');45'use strict';46function TransformStreamCloseReadable(stream) {47  stream._readableClosedPromise.catch(() => {});48  stream._readableController.error(new TypeError('Readable side is closed'));49}50'use strict';51function TransformStreamCloseReadable(stream) {

Using AI Code Generation

1var rs = new ReadableStream({2  pull(c) {3    c.enqueue('a');4    c.close();5  }6});7var ws = new WritableStream({8  write(chunk) {9    return new Promise(resolve => {10      setTimeout(resolve, 1000);11    });12  }13});14var ts = new TransformStream({15  transform(chunk, controller) {16    controller.enqueue(chunk);17  }18});19var writer = ws.getWriter();20var reader = rs.getReader();21var transformer = ts.readable.getWriter();22var readable = ts.readable;23var writable = ts.writable;24var writer1 = writable.getWriter();25var reader1 = readable.getReader();26reader.read().then(function(result) {27  console.log(result);28  writer1.write(result.value);29  return reader1.read();30}).then(function(result) {31  console.log(result);32  writer1.close();33  return reader1.closed;34}).then(function(result) {35  console.log(result);36  return writer.ready;37}).then(function(result) {38  console.log(result);39  return writer.write('b');40}).then(function(result) {41  console.log(result);42  return writer.close();43}).then(function(result) {44  console.log(result);45  return reader.closed;46}).then(function(result) {47  console.log(result);48});

Using AI Code Generation

1const { TransformStreamCloseReadable } = testUtils;2const ts = new TransformStream();3TransformStreamCloseReadable(ts);4ts.readable.getReader().closed.then(() => console.log('closed'));5ts.readable.getReader().read().then(result => console.log(result));6const { TransformStreamCloseReadable } = testUtils;7const ts = new TransformStream();8TransformStreamCloseReadable(ts);9ts.readable.getReader().closed.then(() => console.log('closed'));10ts.readable.getReader().read().then(result => console.log(result));11const { TransformStreamCloseReadable } = testUtils;12const ts = new TransformStream();13TransformStreamCloseReadable(ts);14ts.readable.getReader().closed.then(() => console.log('closed'));15ts.readable.getReader().read().then(result => console.log(result));16const { TransformStreamCloseReadable } = testUtils;17const ts = new TransformStream();18TransformStreamCloseReadable(ts);19ts.readable.getReader().closed.then(() => console.log('closed'));20ts.readable.getReader().read().then(result => console.log(result));21const { TransformStreamCloseReadable } = testUtils;22const ts = new TransformStream();23TransformStreamCloseReadable(ts);24ts.readable.getReader().closed.then(() => console.log('closed'));25ts.readable.getReader().read().then(result => console.log(result));26const { TransformStreamCloseReadable } = testUtils;27const ts = new TransformStream();28TransformStreamCloseReadable(ts);29ts.readable.getReader().closed.then(() => console.log('closed'));30ts.readable.getReader().read().then(result => console.log(result));31const { TransformStreamCloseReadable } = testUtils;32const ts = new TransformStream();33TransformStreamCloseReadable(ts);

Using AI Code Generation

1import assert from "/resources/testharness.js";2import { TransformStream, TransformStreamCloseReadable } from "../resources/transform-stream.js";3const ts = new TransformStream();4TransformStreamCloseReadable(ts);5assert_equals(ts.readable.getReader().closed, undefined, 'closed should be undefined');6assert_equals(ts.readable.getReader().closed, undefined, 'closed should be undefined');7import assert from "/resources/testharness.js";8import { TransformStream, TransformStreamCloseWritable } from "../resources/transform-stream.js";9const ts = new TransformStream();10TransformStreamCloseWritable(ts);11assert_equals(ts.writable.getWriter().closed, undefined, 'closed should be undefined');12assert_equals(ts.writable.getWriter().closed, undefined, 'closed should be undefined');13import assert from "/resources/testharness.js";14import { TransformStream, TransformStreamErrorReadable } from "../resources/transform-stream.js";15const ts = new TransformStream();16TransformStreamErrorReadable(ts, new Error('boo'));17assert_equals(ts.readable.getReader().closed, undefined, 'closed should be undefined');18assert_equals(ts.readable.getReader().closed, undefined, 'closed should be undefined');19import assert from "/resources/testharness.js";20import { TransformStream, TransformStreamErrorWritable } from "../resources/transform-stream.js";21const ts = new TransformStream();22TransformStreamErrorWritable(ts, new Error('boo'));23assert_equals(ts.writable.getWriter().closed, undefined, 'closed should be undefined');24assert_equals(ts.writable.getWriter().closed, undefined, 'closed should be undefined');25import assert from "/resources/testharness.js";26import { TransformStream, TransformStreamSetBackpressure } from "../resources/transform-stream.js";27const ts = new TransformStream();28TransformStreamSetBackpressure(ts, true);29assert_equals(ts.readable.getReader().closed, undefined, 'closed should be undefined');30assert_equals(ts.readable.getReader().closed

Using AI Code Generation

1var readable = null;2var writable = new WritableStream();3var transformer = new Transformer();4var ts = new TransformStream(transformer, writable, readable);5var rs = ts.readable;6var ws = ts.writable;7TransformStreamCloseReadable(rs);8assert_equals(rs.locked, false, 'readable is not locked');

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