test_input_value_set_preserve_undo.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<head>

  <title>Test for bug 2069367</title>

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

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

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

</head>

<body>

<input id="with-attribute" preserveundohistory="">

<script>

SimpleTest.waitForExplicitFinish();

SimpleTest.waitForFocus(() => {

  let input = document.getElementById("with-attribute");

  input.focus();

  input.value = "abc";

  input.value = "def";

  let ctrl = navigator.platform.startsWith("Mac") ? { metaKey: true }

                                                  : { ctrlKey: true };

  synthesizeKey("z", ctrl);

  isnot(input.value, "abc",

        "preserveundohistory has no effect in a content document");

  SimpleTest.finish();

});

</script>

</body>

</html>