stream: deprecate asIndexedPairs

doc/api/stream.md

@@ -2453,6 +2453,11 @@ await Readable.from([1, 2, 3, 4]).take(2).toArray(); // [1, 2]
 added:
   - v17.5.0
   - v16.15.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/48102
+    description: Using the `asIndexedPairs` method emits a runtime warning that
+                  it will be removed in a future version.
 -->
 
 > Stability: 1 - Experimental

lib/internal/streams/operators.js

@@ -23,6 +23,7 @@ const {
   addAbortSignalNoValidate,
 } = require('internal/streams/add-abort-signal');
 const { isWritable, isNodeStream } = require('internal/streams/utils');
+const { deprecate } = require('internal/util');
 
 const {
   ArrayPrototypePush,
@@ -420,7 +421,7 @@ function take(number, options = undefined) {
 }
 
 module.exports.streamReturningOperators = {
-  asIndexedPairs,
+  asIndexedPairs: deprecate(asIndexedPairs, 'readable.asIndexedPairs will be removed in a future version.'),
   drop,
   filter,
   flatMap,

test/parallel/test-stream-iterator-helpers-test262-tests.mjs

@@ -60,8 +60,6 @@ import assert from 'assert';
   }
   // asIndexedPairs/length.js
   assert.strictEqual(Readable.prototype.asIndexedPairs.length, 0);
-  // asIndexedPairs/name.js
-  assert.strictEqual(Readable.prototype.asIndexedPairs.name, 'asIndexedPairs');
   const descriptor = Object.getOwnPropertyDescriptor(
     Readable.prototype,
     'asIndexedPairs'