streams/transferable/deserialize-error.window.js

// 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);