chromium/third_party/blink/web_tests/editing/input/keyboard_event_without_focus.html

<!doctype html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../assert_selection.js"></script>
<script>
test(() => {
  if (!window.eventSender) {
    assert_unreached('This test requires eventSender.');
    return;
  }

  assert_selection(
    '<input value="x"><input type="checkbox">',
    selection => {
      const document = selection.document;
      const textField = document.querySelector('input');
      textField.select();
      document.querySelector('input[type=checkbox]').focus();
      eventSender.keyDown('a');
      // Insert |textField.value| to HTML for verification
      textField.appendChild(document.createTextNode(textField.value));
    },
    '|<input value="x">x</input><input type="checkbox">',
    'unfocused text field should not insert a charcter by keyboard event');

  assert_selection(
    '<div contenteditable>|</div><input type="checkbox">',
    selection => {
      const document = selection.document;
      document.querySelector('input[type=checkbox]').focus();
      eventSender.keyDown('a');
    },
    '<div contenteditable>|</div><input type="checkbox">',
    'unfocused content editable should not insert a charcter by keyboard event');
  }, 'Keyboard event without focus should not insert a character.');
</script>