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<title>
  Async Clipboard write ([text/html ClipboardItem]) -> readHtml tests
</title>
<link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">
<body>Body needed for test_driver.click()</body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="resources/user-activation.js"></script>
<script>
'use strict';
// This function removes extra spaces between tags in html. For example, the
// following html: "<p> Hello </p>   <body> World </body>" would turn into this
//           html: "<p> Hello </p> <body> World </body>"
// We remove the extra spaces because in html they are considered equivalent,
// but when we are comparing for equality the spaces make a difference.
function reformatHtml(html) {
  const parser = new DOMParser();
  const parsedHtml = parser.parseFromString(html, 'text/html')

  // FIXME: The specification is ambiguous on what needs to be preserved.
  // see https://github.com/w3c/clipboard-apis/issues/233
  // This is an attempt at a more canonical form.
  // Remove the head - not visible to users.
  // Remove the styling attribute if present.
  const headElement = parsedHtml.head;
  if (headElement) { headElement.remove(); }
  // Remove the eventual style attributes
  const elementsWithStyleAttribute = parsedHtml.querySelectorAll('[style]');
  elementsWithStyleAttribute.forEach((element) => { element.removeAttribute('style'); });
  const htmlString = parsedHtml.documentElement.innerHTML;
  // Remove multiple spaces and returns and replacing by one
  // trim leading and tailing white spaces
  const reformattedString = htmlString.replace(/\>[\s\n]*\</g, '> <').trim();
  return reformattedString;
}

async function readWriteTest(textInput) {
  await tryGrantReadPermission();
  await tryGrantWritePermission();
  const blobInput = new Blob([textInput], {type: 'text/html'});
  const clipboardItem = new ClipboardItem({'text/html': blobInput});
  await waitForUserActivation();
  await navigator.clipboard.write([clipboardItem]);
  await waitForUserActivation();
  const clipboardItems = await navigator.clipboard.read({type: 'text/html'});

  const html = clipboardItems[0];
  assert_equals(html.types.length, 1);
  assert_equals(html.types[0], 'text/html');

  const blobOutput = await html.getType('text/html');
  assert_equals(blobOutput.type, 'text/html');

  const blobText = await (new Response(blobOutput)).text();

  const outputHtml = reformatHtml(blobText);
  const inputHtml = reformatHtml(textInput);
  assert_equals(outputHtml, inputHtml);
}
const testCases = [`<!doctype html> <html> <head> <title>Title of the
                    document</title> </head> <body> <p>Hello World</p>
                    </body> </html>`,
                   '<title>Title of the document</title> <p>Hello World</p>'];

promise_test(async t => {
  for (const testCase of testCases) {
    await readWriteTest(testCase);
  }
}, 'Verify read and write of some text/html content');

</script>