1 files changed, 39 insertions, 0 deletions
diff --git a/testing/web-platform/tests/streams/transferable/deserialize-error.window.js b/testing/web-platform/tests/streams/transferable/deserialize-error.window.js
new file mode 100644
index 0000000000..64cf2bbfb1
--- /dev/null
+++ b/testing/web-platform/tests/streams/transferable/deserialize-error.window.js
@@ -0,0 +1,39 @@
+// META: script=/common/get-host-info.sub.js
+// META: script=resources/create-wasm-module.js
+// META: timeout=long
+
+const { HTTPS_NOTSAMESITE_ORIGIN } = get_host_info();
+const iframe = document.createElement('iframe');
+iframe.src = `${HTTPS_NOTSAMESITE_ORIGIN}/streams/transferable/resources/deserialize-error-frame.html`;
+
+window.addEventListener('message', async evt => {
+  // Tests are serialized to make the results deterministic.
+  switch (evt.data) {
+    case 'init done': {
+      const ws = new WritableStream();
+      iframe.contentWindow.postMessage(ws, '*', [ws]);
+      return;
+    }
+
+    case 'ws done': {
+      const module = await createWasmModule();
+      const rs = new ReadableStream({
+        start(controller) {
+          controller.enqueue(module);
+        }
+      });
+      iframe.contentWindow.postMessage(rs, '*', [rs]);
+      return;
+    }
+
+    case 'rs done': {
+      iframe.remove();
+    }
+  }
+});
+
+// Need to do this after adding the listener to ensure we catch the first
+// message.
+document.body.appendChild(iframe);
+
+fetch_tests_from_window(iframe.contentWindow);