From 3bdcaf1cf62d3d5aaef026f726776e47bb37542b Mon Sep 17 00:00:00 2001
From: Taym Haddadi <haddadi.taym@gmail.com>
Date: Tue, 15 Apr 2025 22:44:06 +0200
Subject: [PATCH] Add pipeTo with different readers type

Signed-off-by: Taym Haddadi <haddadi.taym@gmail.com>
---
 .../mozilla/stream/pipeTo-reader-locks.any.js | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 tests/wpt/mozilla/tests/mozilla/stream/pipeTo-reader-locks.any.js

diff --git a/tests/wpt/mozilla/tests/mozilla/stream/pipeTo-reader-locks.any.js b/tests/wpt/mozilla/tests/mozilla/stream/pipeTo-reader-locks.any.js
new file mode 100644
index 00000000000..e4ef1799ff0
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/stream/pipeTo-reader-locks.any.js
@@ -0,0 +1,33 @@
+'use strict';
+
+promise_test(t => {
+    const rs = new ReadableStream();
+    const ws = new WritableStream();
+
+    rs.getReader();
+
+    assert_true(rs.locked, 'sanity check: the ReadableStream starts locked');
+    assert_false(ws.locked, 'sanity check: the WritableStream does not start locked');
+
+    return promise_rejects_js(t, TypeError, rs.pipeTo(ws)).then(() => {
+        assert_false(ws.locked, 'the WritableStream must still be unlocked');
+    });
+
+}, 'pipeTo must fail if the ReadableStream is locked with a Default reader, and not lock the WritableStream');
+
+
+promise_test(t => {
+    const rs = new ReadableStream({
+        type: 'bytes',
+        pull(controller) {
+            // No chunks are enqueued; the stream remains readable but empty.
+        }
+    });
+    const ws = new WritableStream();
+    rs.getReader({ mode: 'byob' });
+    assert_true(rs.locked, 'sanity check: the ReadableStream is locked by the BYOB reader');
+    assert_false(ws.locked, 'sanity check: the WritableStream starts unlocked');
+    return promise_rejects_js(t, TypeError, rs.pipeTo(ws)).then(() => {
+        assert_false(ws.locked, 'the WritableStream must remain unlocked after pipeTo rejection');
+    });
+}, 'pipeTo must fail if the ReadableStream is locked with a BYOB reader, and must not lock the WritableStream');