1 files changed, 69 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-stream-readable-no-unneeded-readable.js b/tests/node_compat/test/parallel/test-stream-readable-no-unneeded-readable.js
new file mode 100644
index 000000000..9a96db87d
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-stream-readable-no-unneeded-readable.js
@@ -0,0 +1,69 @@
+// deno-fmt-ignore-file
+// deno-lint-ignore-file
+
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+// Taken from Node 18.12.1
+// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
+
+'use strict';
+const common = require('../common');
+const { Readable, PassThrough } = require('stream');
+
+function test(r) {
+  const wrapper = new Readable({
+    read: () => {
+      let data = r.read();
+
+      if (data) {
+        wrapper.push(data);
+        return;
+      }
+
+      r.once('readable', function() {
+        data = r.read();
+        if (data) {
+          wrapper.push(data);
+        }
+        // else: the end event should fire
+      });
+    },
+  });
+
+  r.once('end', function() {
+    wrapper.push(null);
+  });
+
+  wrapper.resume();
+  wrapper.once('end', common.mustCall());
+}
+
+{
+  const source = new Readable({
+    read: () => {}
+  });
+  source.push('foo');
+  source.push('bar');
+  source.push(null);
+
+  const pt = source.pipe(new PassThrough());
+  test(pt);
+}
+
+{
+  // This is the underlying cause of the above test case.
+  const pushChunks = ['foo', 'bar'];
+  const r = new Readable({
+    read: () => {
+      const chunk = pushChunks.shift();
+      if (chunk) {
+        // synchronous call
+        r.push(chunk);
+      } else {
+        // asynchronous call
+        process.nextTick(() => r.push(null));
+      }
+    },
+  });
+
+  test(r);
+}