paste-drop-linebreak-into-text-input.html

<!DOCTYPE html>
<title>Pasting or dropping a line break into text input should not submit the form</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../../resources/ahem.js"></script>

<pre id="source" style="font: 20px/1 Ahem">foo
bar</pre>

<form id="form">
  <input id="target" type="text" value="abc">
</form>

<script>
let formSubmitted = false;
form.onsubmit = event => {
  event.preventDefault();
  formSubmitted = true;
}

const sourceText = source.firstChild;

promise_test(async test => {
  test.add_cleanup(async () => formSubmitted = false);

  // Select the line break
  getSelection().setBaseAndExtent(sourceText, 3, sourceText, 4);

  document.execCommand('copy');
  target.focus();
  document.execCommand('paste');

  // Give non-conformant UA some time to asynchronously dispatch 'submit' event
  await new Promise(resolve => test.step_timeout(resolve, 100));
  assert_false(formSubmitted);
}, 'Pasting line break into text input should not submit the form');

promise_test(async test => {
  assert_own_property(window, 'eventSender',
                      'This test needs eventSender to emulate drag and drop');
  test.add_cleanup(async () => formSubmitted = false);

  await document.fonts.ready;

  // Select the line break
  getSelection().setBaseAndExtent(sourceText, 3, sourceText, 4);

  // Drag from the selection highlight
  const startX = source.offsetLeft + 65;
  const startY = source.offsetTop + 5;
  eventSender.mouseMoveTo(startX, startY);
  eventSender.mouseDown();
  eventSender.leapForward(100);

  // Drop inside the text input
  const endX = target.offsetLeft + target.offsetWidth / 2;
  const endY = target.offsetTop + target.offsetHeight / 2;
  eventSender.mouseMoveTo(endX, endY);
  eventSender.mouseUp();

  // Give non-conformant UA some time to asynchronously dispatch 'submit' event
  await new Promise(resolve => test.step_timeout(resolve, 100));
  assert_false(formSubmitted);
}, 'Drag-and-dropping line break into text input should not submit the form');
</script>
chromium/third_party/blink/web_tests/editing/pasteboard/paste-drop-linebreak-into-text-input.html
