servo/tests/wpt/web-platform-tests/web-bundle/resources/test-helpers.js

// Helper functions used in web-bundle tests.

function addElementAndWaitForLoad(element) {
  return new Promise((resolve, reject) => {
    element.onload = resolve;
    element.onerror = reject;
    document.body.appendChild(element);
  });
}

function addElementAndWaitForError(element) {
  return new Promise((resolve, reject) => {
    element.onload = reject;
    element.onerror = resolve;
    document.body.appendChild(element);
  });
}

function fetchAndWaitForReject(url) {
  return new Promise((resolve, reject) => {
    fetch(url)
      .then(() => {
        reject();
      })
      .catch(() => {
        resolve();
      });
  });
}

function addLinkAndWaitForLoad(url, resources, crossorigin) {
  return new Promise((resolve, reject) => {
    const link = document.createElement("link");
    link.rel = "webbundle";
    link.href = url;
    if (crossorigin) {
      link.crossOrigin = crossorigin;
    }
    for (const resource of resources) {
      link.resources.add(resource);
    }
    link.onload = () => resolve(link);
    link.onerror = () => reject(link);
    document.body.appendChild(link);
  });
}

function addLinkAndWaitForError(url, resources, crossorigin) {
  return new Promise((resolve, reject) => {
    const link = document.createElement("link");
    link.rel = "webbundle";
    link.href = url;
    if (crossorigin) {
      link.crossOrigin = crossorigin;
    }
    for (const resource of resources) {
      link.resources.add(resource);
    }
    link.onload = () => reject(link);
    link.onerror = () => resolve(link);
    document.body.appendChild(link);
  });
}

function addScriptAndWaitForError(url) {
  return new Promise((resolve, reject) => {
    const script = document.createElement("script");
    script.src = url;
    script.onload = reject;
    script.onerror = resolve;
    document.body.appendChild(script);
  });
}