stream: add test for multiple .push(null)

PR-URL: #29645
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Yongsheng Zhang <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>

Author: ckarande

test/parallel/test-stream-readable-ended.js

@@ -31,3 +31,16 @@ const assert = require('assert');
     assert.strictEqual(readable.readableEnded, false);
   }));
 }
+
+// Verifies no `error` triggered on multiple .push(null) invocations
+{
+  const readable = new Readable();
+
+  readable.on('readable', () => { readable.read(); });
+  readable.on('error', common.mustNotCall());
+  readable.on('end', common.mustCall());
+
+  readable.push('a');
+  readable.push(null);
+  readable.push(null);
+}