1 files changed, 55 insertions, 0 deletions
diff --git a/testing/web-platform/tests/streams/readable-byte-streams/respond-after-enqueue.any.js b/testing/web-platform/tests/streams/readable-byte-streams/respond-after-enqueue.any.js
new file mode 100644
index 0000000000..b93cec9739
--- /dev/null
+++ b/testing/web-platform/tests/streams/readable-byte-streams/respond-after-enqueue.any.js
@@ -0,0 +1,55 @@
+// META: global=window,worker
+
+'use strict';
+
+// Repro for Blink bug https://crbug.com/1255762.
+promise_test(async () => {
+  const rs = new ReadableStream({
+    type: 'bytes',
+    autoAllocateChunkSize: 10,
+    pull(controller) {
+      controller.enqueue(new Uint8Array([1, 2, 3]));
+      controller.byobRequest.respond(10);
+    }
+  });
+
+  const reader = rs.getReader();
+  const {value, done} = await reader.read();
+  assert_false(done, 'done should not be true');
+  assert_array_equals(value, [1, 2, 3], 'value should be 3 bytes');
+}, 'byobRequest.respond() after enqueue() should not crash');
+
+promise_test(async () => {
+  const rs = new ReadableStream({
+    type: 'bytes',
+    autoAllocateChunkSize: 10,
+    pull(controller) {
+      const byobRequest = controller.byobRequest;
+      controller.enqueue(new Uint8Array([1, 2, 3]));
+      byobRequest.respond(10);
+    }
+  });
+
+  const reader = rs.getReader();
+  const {value, done} = await reader.read();
+  assert_false(done, 'done should not be true');
+  assert_array_equals(value, [1, 2, 3], 'value should be 3 bytes');
+}, 'byobRequest.respond() with cached byobRequest after enqueue() should not crash');
+
+promise_test(async () => {
+  const rs = new ReadableStream({
+    type: 'bytes',
+    autoAllocateChunkSize: 10,
+    pull(controller) {
+      controller.enqueue(new Uint8Array([1, 2, 3]));
+      controller.byobRequest.respond(2);
+    }
+  });
+
+  const reader = rs.getReader();
+  const [read1, read2] = await Promise.all([reader.read(), reader.read()]);
+  assert_false(read1.done, 'read1.done should not be true');
+  assert_array_equals(read1.value, [1, 2, 3], 'read1.value should be 3 bytes');
+  assert_false(read2.done, 'read2.done should not be true');
+  assert_array_equals(read2.value, [0, 0], 'read2.value should be 2 bytes');
+}, 'byobRequest.respond() after enqueue() with double read should not crash');