test_computed_style_in_created_document.html

Enable keyboard shortcuts

<!DOCTYPE html>

<html>

<head>

  <title>Test for bug 1398619</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">

</head>

<body>

<script>

SimpleTest.waitForExplicitFinish();

let referenceFontSize = getComputedStyle(document.body).fontSize;

function checkComputedStyle(desc, doc) {

  try {

    let fontSize = getComputedStyle(doc.body).fontSize;

    is(fontSize, referenceFontSize, `${desc}: get computed font-size`);

  } catch (e) {

    ok(false, `${desc}: fail to get computed font-size, ${e}`);

async function runTest() {

  // DOMParser

    let parser = new DOMParser();

    let doc = parser.parseFromString("<body>", "text/html");

    checkComputedStyle("DOMParser", doc);

  // DOMImplementation

    let doc = document.implementation.createHTMLDocument("");

    checkComputedStyle("DOMImplementation", doc);

  // XMLHttpRequest

    let xhr = new XMLHttpRequest();

    xhr.open("GET", "empty.html");

    xhr.responseType = "document";

    let promise = new Promise(resolve => {

      xhr.onload = resolve;

});

    xhr.send();

    await promise;

    checkComputedStyle("XMLHttpRequest", xhr.responseXML);

runTest()

  .catch(e => ok(false, `Exception: ${e}`))

  .then(() => SimpleTest.finish());

</script>

</body>

</html>