stream: never flatten on toArray

Author: benjamingr

lib/internal/streams/operators.js

@@ -1,7 +1,6 @@
 'use strict';
 
 const { AbortController } = require('internal/abort_controller');
-const { Buffer } = require('buffer');
 
 const {
   codes: {
@@ -185,9 +184,6 @@ async function toArray(options) {
     }
     ArrayPrototypePush(result, val);
   }
-  if (!this.readableObjectMode) {
-    return Buffer.concat(result);
-  }
   return result;
 }
 module.exports.streamReturningOperators = {

test/parallel/test-stream-toArray.js

@@ -24,14 +24,16 @@ const assert = require('assert');
 }
 
 {
-  // Works on a non-object-mode stream and flattens it
+  // Works on a non-object-mode stream
   (async () => {
+    const firstBuffer = Buffer.from([1, 2, 3]);
+    const secondBuffer = Buffer.from([4, 5, 6]);
     const stream = Readable.from(
-      [Buffer.from([1, 2, 3]), Buffer.from([4, 5, 6])]
-      , { objectMode: false });
+      [firstBuffer, secondBuffer],
+      { objectMode: false });
     const result = await stream.toArray();
-    assert.strictEqual(Buffer.isBuffer(result), true);
-    assert.deepStrictEqual(Array.from(result), [1, 2, 3, 4, 5, 6]);
+    assert.strictEqual(Array.isArray(result), true);
+    assert.deepStrictEqual(result, [firstBuffer, secondBuffer]);
   })().then(common.mustCall());
 }