stream: simplify `.pipe()` and `.unpipe()` in Readable

Now we are using `pipes` and `pipesCount` in Readable state and the
`pipes` value can be a stream or an array of streams. This change
reducing them into one `pipes` value, which is an array of streams.

PR-URL: https://github.com/nodejs/node/pull/28583
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/test/parallel/test-stream2-basic.js b/test/parallel/test-stream2-basic.js
index fa1443fd2a..094ecabd49 100644
--- a/test/parallel/test-stream2-basic.js
+++ b/test/parallel/test-stream2-basic.js
@@ -171,10 +171,10 @@ class TestWriter extends EE {
   w[0].on('write', function() {
     if (--writes === 0) {
       r.unpipe();
-      assert.strictEqual(r._readableState.pipes, null);
+      assert.deepStrictEqual(r._readableState.pipes, []);
       w[0].end();
       r.pipe(w[1]);
-      assert.strictEqual(r._readableState.pipes, w[1]);
+      assert.deepStrictEqual(r._readableState.pipes, [w[1]]);
     }
   });