toolkit/components/extensions/test/mochitest/webrequest_test.sys.mjs


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export var webrequest_test = {
  testFetch(url) {
    return fetch(url);
  },

  testXHR(url) {
    return new Promise(resolve => {
      let xhr = new XMLHttpRequest();
      xhr.open("HEAD", url);
      xhr.onload = () => {
        resolve();
      };
      xhr.send();
    });
  },
};