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How to use TransformStreamEnqueueToReadable method in wpt
Best JavaScript code snippet using wpt
transformstream.js
Source:transformstream.js 
...8 throw new TypeError('Readable side is already closed');9 }10 TransformStreamCloseReadableInternal(transformStream);11}12function TransformStreamEnqueueToReadable(transformStream, chunk) {13 // console.log('TransformStreamEnqueueToReadable()');14 if (transformStream._errored === true) {15 throw new TypeError('TransformStream is already errored');16 }17 if (transformStream._readableClosed === true) {18 throw new TypeError('Readable side is already closed');19 }20 // We throttle transformer.transform invocation based on the backpressure of the ReadableStream, but we still21 // accept TransformStreamEnqueueToReadable() calls.22 const controller = transformStream._readableController;23 try {24 ReadableStreamDefaultControllerEnqueue(controller, chunk);25 } catch (e) {26 // This happens when readableStrategy.size() throws.27 // The ReadableStream has already errored itself.28 transformStream._readableClosed = true;29 TransformStreamErrorIfNeeded(transformStream, e);30 throw transformStream._storedError;31 }32 const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);33 const maybeBackpressure = desiredSize <= 0;34 if (maybeBackpressure === true && transformStream._backpressure === false) {35 // This allows pull() again. When desiredSize is 0, it's possible that a pull() will happen immediately (but36 // asynchronously) after this because of pending read()s and set _backpressure back to false.37 //38 // If pull() could be called from inside enqueue(), then this logic would be wrong. This cannot happen39 // because there is always a promise pending from start() or pull() when _backpressure is false.40 TransformStreamSetBackpressure(transformStream, true);41 }42}43function TransformStreamError(transformStream, e) {44 if (transformStream._errored === true) {45 throw new TypeError('TransformStream is already errored');46 }47 TransformStreamErrorInternal(transformStream, e);48}49// Abstract operations.50function TransformStreamCloseReadableInternal(transformStream) {51 assert(transformStream._errored === false);52 assert(transformStream._readableClosed === false);53 try {54 ReadableStreamDefaultControllerClose(transformStream._readableController);55 } catch (e) {56 assert(false);57 }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 // console.log('TransformStreamErrorInternal()');67 assert(transformStream._errored === false);68 transformStream._errored = true;69 transformStream._storedError = e;70 if (transformStream._writableDone === false) {71 WritableStreamDefaultControllerError(transformStream._writableController, e);72 }73 if (transformStream._readableClosed === false) {74 ReadableStreamDefaultControllerError(transformStream._readableController, e);75 }76}77// Used for preventing the next write() call on TransformStreamSink until there78// is no longer backpressure.79function TransformStreamReadableReadyPromise(transformStream) {80 assert(transformStream._backpressureChangePromise !== undefined,81 '_backpressureChangePromise should have been initialized');82 if (transformStream._backpressure === false) {83 return Promise.resolve();84 }85 assert(transformStream._backpressure === true, '_backpressure should have been initialized');86 return transformStream._backpressureChangePromise;87}88function TransformStreamSetBackpressure(transformStream, backpressure) {89 // console.log(`TransformStreamSetBackpressure(${backpressure})`);90 // Passes also when called during construction.91 assert(transformStream._backpressure !== backpressure,92 'TransformStreamSetBackpressure() should be called only when backpressure is changed');93 if (transformStream._backpressureChangePromise !== undefined) {94 // The fulfillment value is just for a sanity check.95 transformStream._backpressureChangePromise_resolve(backpressure);96 }97 transformStream._backpressureChangePromise = new Promise(resolve => {98 transformStream._backpressureChangePromise_resolve = resolve;99 });100 transformStream._backpressureChangePromise.then(resolution => {101 assert(resolution !== backpressure,102 '_backpressureChangePromise should be fulfilled only when backpressure is changed');103 });104 transformStream._backpressure = backpressure;105}106function TransformStreamDefaultTransform(chunk, transformStreamController) {107 const transformStream = transformStreamController._controlledTransformStream;108 TransformStreamEnqueueToReadable(transformStream, chunk);109 return Promise.resolve();110}111function TransformStreamTransform(transformStream, chunk) {112 // console.log('TransformStreamTransform()');113 assert(transformStream._errored === false);114 assert(transformStream._transforming === false);115 assert(transformStream._backpressure === false);116 transformStream._transforming = true;117 const transformer = transformStream._transformer;118 const controller = transformStream._transformStreamController;119 const transformPromise = PromiseInvokeOrPerformFallback(transformer, 'transform', [chunk, controller],120 TransformStreamDefaultTransform, [chunk, controller]);121 return transformPromise.then(122 () => {123 transformStream._transforming = false;124 return TransformStreamReadableReadyPromise(transformStream);125 },126 e => {127 TransformStreamErrorIfNeeded(transformStream, e);128 return Promise.reject(e);129 });130}131function IsTransformStreamDefaultController(x) {132 if (!typeIsObject(x)) {133 return false;134 }135 if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {136 return false;137 }138 return true;139}140function IsTransformStream(x) {141 if (!typeIsObject(x)) {142 return false;143 }144 if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {145 return false;146 }147 return true;148}149class TransformStreamSink {150 constructor(transformStream, startPromise) {151 this._transformStream = transformStream;152 this._startPromise = startPromise;153 }154 start(c) {155 const transformStream = this._transformStream;156 transformStream._writableController = c;157 return this._startPromise.then(() => TransformStreamReadableReadyPromise(transformStream));158 }159 write(chunk) {160 // console.log('TransformStreamSink.write()');161 const transformStream = this._transformStream;162 return TransformStreamTransform(transformStream, chunk);163 }164 abort() {165 const transformStream = this._transformStream;166 transformStream._writableDone = true;167 TransformStreamErrorInternal(transformStream, new TypeError('Writable side aborted'));168 }169 close() {170 // console.log('TransformStreamSink.close()');171 const transformStream = this._transformStream;172 assert(transformStream._transforming === false);173 transformStream._writableDone = true;174 const flushPromise = PromiseInvokeOrNoop(transformStream._transformer,175 'flush', [transformStream._transformStreamController]);176 // Return a promise that is fulfilled with undefined on success.177 return flushPromise.then(() => {178 if (transformStream._errored === true) {179 return Promise.reject(transformStream._storedError);180 }181 if (transformStream._readableClosed === false) {182 TransformStreamCloseReadableInternal(transformStream);183 }184 return Promise.resolve();185 }).catch(r => {186 TransformStreamErrorIfNeeded(transformStream, r);187 return Promise.reject(transformStream._storedError);188 });189 }190}191class TransformStreamSource {192 constructor(transformStream, startPromise) {193 this._transformStream = transformStream;194 this._startPromise = startPromise;195 }196 start(c) {197 const transformStream = this._transformStream;198 transformStream._readableController = c;199 return this._startPromise.then(() => {200 // Prevent the first pull() call until there is backpressure.201 assert(transformStream._backpressureChangePromise !== undefined,202 '_backpressureChangePromise should have been initialized');203 if (transformStream._backpressure === true) {204 return Promise.resolve();205 }206 assert(transformStream._backpressure === false, '_backpressure should have been initialized');207 return transformStream._backpressureChangePromise;208 });209 }210 pull() {211 // console.log('TransformStreamSource.pull()');212 const transformStream = this._transformStream;213 // Invariant. Enforced by the promises returned by start() and pull().214 assert(transformStream._backpressure === true, 'pull() should be never called while _backpressure is false');215 assert(transformStream._backpressureChangePromise !== undefined,216 '_backpressureChangePromise should have been initialized');217 TransformStreamSetBackpressure(transformStream, false);218 // Prevent the next pull() call until there is backpressure.219 return transformStream._backpressureChangePromise;220 }221 cancel() {222 const transformStream = this._transformStream;223 transformStream._readableClosed = true;224 TransformStreamErrorInternal(transformStream, new TypeError('Readable side canceled'));225 }226}227class TransformStreamDefaultController {228 constructor(transformStream) {229 if (IsTransformStream(transformStream) === false) {230 throw new TypeError('TransformStreamDefaultController can only be ' +231 'constructed with a TransformStream instance');232 }233 if (transformStream._transformStreamController !== undefined) {234 throw new TypeError('TransformStreamDefaultController instances can ' +235 'only be created by the TransformStream constructor');236 }237 this._controlledTransformStream = transformStream;238 }239 get desiredSize() {240 if (IsTransformStreamDefaultController(this) === false) {241 throw defaultControllerBrandCheckException('desiredSize');242 }243 const transformStream = this._controlledTransformStream;244 const readableController = transformStream._readableController;245 return ReadableStreamDefaultControllerGetDesiredSize(readableController);246 }247 enqueue(chunk) {248 if (IsTransformStreamDefaultController(this) === false) {249 throw defaultControllerBrandCheckException('enqueue');250 }251 TransformStreamEnqueueToReadable(this._controlledTransformStream, chunk);252 }253 close() {254 if (IsTransformStreamDefaultController(this) === false) {255 throw defaultControllerBrandCheckException('close');256 }257 TransformStreamCloseReadable(this._controlledTransformStream);258 }259 error(reason) {260 if (IsTransformStreamDefaultController(this) === false) {261 throw defaultControllerBrandCheckException('error');262 }263 TransformStreamError(this._controlledTransformStream, reason);264 }265}...
transform-stream.js
Source:transform-stream.js
...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}...
Using AI Code Generation
1var ts = new TransformStream();2var writer = ts.writable.getWriter();3var reader = ts.readable.getReader();4TransformStreamEnqueueToReadable(ts, 'Hello');5TransformStreamEnqueueToReadable(ts, 'world');6reader.read().then(function(result) {7 return reader.read();8}).then(function(result) {9 return reader.read();10}).then(function(result) {11});12function TransformStreamEnqueueToReadable(stream, chunk) {13 var reader = stream.readable.getReader();14 var writer = stream.writable.getWriter();15 writer.write(chunk);16 return reader.read();17}
Using AI Code Generation
1var rs = new ReadableStream({2 start: function(controller) {3 }4});5var ws = new WritableStream({6 start: function(controller) {7 }8});9var ts = new TransformStream({10 start: function(controller) {11 }12});13var writer = ws.getWriter();14var reader = rs.getReader();15var transform = ts.getTransform();16var writer = ts.writable.getWriter();17var reader = ts.readable.getReader();18var writer = ts.writable.getWriter();19var reader = ts.readable.getReader();
Using AI Code Generation
1const { TransformStreamEnqueueToReadable } = await import('./resources/test-utils.js');2const ts = new TransformStream({3 transform(chunk, controller) {4 }5});6TransformStreamEnqueueToReadable(ts.readable, 'a');7TransformStreamEnqueueToReadable(ts.readable, 'b');8TransformStreamEnqueueToReadable(ts.readable, 'c');9const reader = ts.readable.getReader();10import { TransformStreamEnqueueToReadable } from './resources/test-utils.js';11const ts = new TransformStream({12 transform(chunk, controller) {13 }14});15TransformStreamEnqueueToReadable(ts.readable, 'a');16TransformStreamEnqueueToReadable(ts.readable, 'b');17TransformStreamEnqueueToReadable(ts.readable, 'c');18const reader = ts.readable.getReader();19TransformStreamEnqueueToReadable ( readable , chunk )20const ts = new TransformStream({21 transform(chunk, controller) {22 }23});24TransformStreamEnqueueToReadable(ts.readable, 'a');25TransformStreamEnqueueToReadable(ts.readable, 'b');26TransformStreamEnqueueToReadable(ts.readable, 'c');27const reader = ts.readable.getReader();
Using AI Code Generation
1import { TransformStreamEnqueueToReadable } from "./wpt.js";2const ts = new TransformStream();3const reader = ts.readable.getReader();4const writer = ts.writable.getWriter();5TransformStreamEnqueueToReadable(ts, "hello");6export function TransformStreamEnqueueToReadable(ts, chunk) {7 ts.readable._underlyingSource.controller.enqueue(chunk);8}9TransformStreamErrorReadable()10TransformStreamErrorReadable(ts, e)11import { TransformStreamErrorReadable } from "./wpt.js";12const ts = new TransformStream();13const reader = ts.readable.getReader();14const writer = ts.writable.getWriter();15TransformStreamErrorReadable(ts, new Error("error"));16export function TransformStreamErrorReadable(ts, e) {17 ts.readable._underlyingSource.controller.error(e);18}19TransformStreamErrorWritable()20TransformStreamErrorWritable(ts, e)
Using AI Code Generation
1var wpt = require('web-platform-test');2var TransformStreamEnqueueToReadable = wpt.TransformStreamEnqueueToReadable;3var TransformStreamEnqueueToReadable = wpt.TransformStreamEnqueueToReadable;4TransformStreamEnqueueToReadable(readableStream, chunk)5var wpt = require('web-platform-test');6var TransformStreamEnqueueToReadable = wpt.TransformStreamEnqueueToReadable;7var readableStream = new ReadableStream();8TransformStreamEnqueueToReadable(readableStream, 'chunk');
Using AI Code Generation
1function testEnqueueToReadable() {2 let rs = new ReadableStream();3 let writer = rs.getWriter();4 let chunk = 'chunk';5 TransformStreamEnqueueToReadable(writer, chunk);6 let result = writer.read();7 assert_equals(result.value, chunk);8 assert_false(result.done);9}10function testEnqueueToWritable() {11 let ts = new TransformStream();12 let writer = ts.writable.getWriter();13 let chunk = 'chunk';14 TransformStreamEnqueueToWritable(writer, chunk);15 let result = writer.read();16 assert_equals(result.value, chunk);17 assert_false(result.done);18}19function testErrorReadable() {20 let rs = new ReadableStream();21 let writer = rs.getWriter();22 let e = new Error('error');23 TransformStreamErrorReadable(writer, e);24 let result = writer.read();25 assert_true(result.done);26 assert_equals(result.value, e);27}28function testErrorWritable() {29 let ts = new TransformStream();30 let writer = ts.writable.getWriter();31 let e = new Error('error');32 TransformStreamErrorWritable(writer, e);33 let result = writer.read();34 assert_true(result.done);35 assert_equals(result.value, e);36}37function testGetReadable() {38 let ts = new TransformStream();39 let rs = TransformStreamGetReadable(ts);40 assert_true(rs instanceof ReadableStream);41}42function testGetTransformer() {43 let ts = new TransformStream();44 let transformer = TransformStreamGetTransformer(ts);45 assert_true(transformer instanceof Object);46}47function testGetWritable() {48 let ts = new TransformStream();49 let ws = TransformStreamGetWritable(ts);50 assert_true(ws instanceof WritableStream);51}
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