stream: fix web streams have no Symbol.toStringTag

fix web streams have no Symbol.toStringTag

lib/internal/webstreams/queuingstrategies.js

@@ -60,7 +60,10 @@ const countSizeFunction = ObjectDefineProperty(() => 1, 'name', nameDescriptor);
  * @type {QueuingStrategy}
  */
 class ByteLengthQueuingStrategy {
-  [kType] = 'ByteLengthQueuingStrategy';
+
+  get [kType]() {
+    return 'ByteLengthQueuingStrategy';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 
@@ -116,7 +119,10 @@ ObjectDefineProperties(ByteLengthQueuingStrategy.prototype, {
  * @type {QueuingStrategy}
  */
 class CountQueuingStrategy {
-  [kType] = 'CountQueuingStrategy';
+
+  get [kType]() {
+    return 'CountQueuingStrategy';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 

lib/internal/webstreams/readablestream.js

@@ -204,7 +204,10 @@ const kRelease = Symbol('kRelease');
  */
 
 class ReadableStream {
-  [kType] = 'ReadableStream';
+
+  get [kType]() {
+    return 'ReadableStream';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 
@@ -627,7 +630,10 @@ function TransferredReadableStream() {
 TransferredReadableStream.prototype[kDeserialize] = () => {};
 
 class ReadableStreamBYOBRequest {
-  [kType] = 'ReadableStreamBYOBRequest';
+
+  get [kType]() {
+    return 'ReadableStreamBYOBRequest';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 
@@ -767,7 +773,10 @@ class ReadIntoRequest {
 }
 
 class ReadableStreamDefaultReader {
-  [kType] = 'ReadableStreamDefaultReader';
+
+  get [kType]() {
+    return 'ReadableStreamDefaultReader';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 
@@ -857,7 +866,11 @@ ObjectDefineProperties(ReadableStreamDefaultReader.prototype, {
 });
 
 class ReadableStreamBYOBReader {
-  [kType] = 'ReadableStreamBYOBReader';
+
+  get [kType]() {
+    return 'ReadableStreamBYOBReader';
+  }
+
 
   get [SymbolToStringTag]() { return this[kType]; }
 
@@ -974,7 +987,10 @@ ObjectDefineProperties(ReadableStreamBYOBReader.prototype, {
 });
 
 class ReadableStreamDefaultController {
-  [kType] = 'ReadableStreamDefaultController';
+
+  get [kType]() {
+    return 'ReadableStreamDefaultController';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 
@@ -1046,7 +1062,10 @@ function createReadableStreamDefaultController() {
 }
 
 class ReadableByteStreamController {
-  [kType] = 'ReadableByteStreamController';
+
+  get [kType]() {
+    return 'ReadableByteStreamController';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 

lib/internal/webstreams/transformstream.js

@@ -100,7 +100,10 @@ const assert = require('internal/assert');
  */
 
 class TransformStream {
-  [kType] = 'TransformStream';
+
+  get [kType]() {
+    return 'TransformStream';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 
@@ -259,7 +262,10 @@ function TransferredTransformStream() {
 TransferredTransformStream.prototype[kDeserialize] = () => {};
 
 class TransformStreamDefaultController {
-  [kType] = 'TransformStreamDefaultController';
+
+  get [kType]() {
+    return 'TransformStreamDefaultController';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 

lib/internal/webstreams/writablestream.js

@@ -119,7 +119,10 @@ const kError = Symbol('kError');
  */
 
 class WritableStream {
-  [kType] = 'WritableStream';
+
+  get [kType]() {
+    return 'WritableStream';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 
@@ -346,7 +349,10 @@ function TransferredWritableStream() {
 TransferredWritableStream.prototype[kDeserialize] = () => {};
 
 class WritableStreamDefaultWriter {
-  [kType] = 'WritableStreamDefaultWriter';
+
+  get [kType]() {
+    return 'WritableStreamDefaultWriter';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 
@@ -490,7 +496,10 @@ ObjectDefineProperties(WritableStreamDefaultWriter.prototype, {
 });
 
 class WritableStreamDefaultController {
-  [kType] = 'WritableStreamDefaultController';
+
+  get [kType]() {
+    return 'WritableStreamDefaultController';
+  }
 
   get [SymbolToStringTag]() { return this[kType]; }
 

test/parallel/test-webstream-string-tag.js

@@ -0,0 +1,22 @@
+'use strict';
+
+require('../common');
+
+const assert = require('assert');
+
+assert.strictEqual(WritableStream.prototype[Symbol.toStringTag], 'WritableStream');
+assert.strictEqual(WritableStreamDefaultWriter.prototype[Symbol.toStringTag], 'WritableStreamDefaultWriter');
+assert.strictEqual(WritableStreamDefaultController.prototype[Symbol.toStringTag], 'WritableStreamDefaultController');
+
+assert.strictEqual(ReadableStream.prototype[Symbol.toStringTag], 'ReadableStream');
+assert.strictEqual(ReadableStreamBYOBRequest.prototype[Symbol.toStringTag], 'ReadableStreamBYOBRequest');
+assert.strictEqual(ReadableStreamDefaultReader.prototype[Symbol.toStringTag], 'ReadableStreamDefaultReader');
+assert.strictEqual(ReadableStreamBYOBReader.prototype[Symbol.toStringTag], 'ReadableStreamBYOBReader');
+assert.strictEqual(ReadableStreamDefaultController.prototype[Symbol.toStringTag], 'ReadableStreamDefaultController');
+assert.strictEqual(ReadableByteStreamController.prototype[Symbol.toStringTag], 'ReadableByteStreamController');
+
+assert.strictEqual(ByteLengthQueuingStrategy.prototype[Symbol.toStringTag], 'ByteLengthQueuingStrategy');
+assert.strictEqual(CountQueuingStrategy.prototype[Symbol.toStringTag], 'CountQueuingStrategy');
+
+assert.strictEqual(TransformStream.prototype[Symbol.toStringTag], 'TransformStream');
+assert.strictEqual(TransformStreamDefaultController.prototype[Symbol.toStringTag], 'TransformStreamDefaultController');