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<!DOCTYPE html>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=358033
-->
<head>
 <title>Test for Bug 358033</title>
 <script src="/tests/SimpleTest/SimpleTest.js"></script>
 <script src="/tests/SimpleTest/EventUtils.js"></script>
 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=358033">Mozilla Bug 358033</a>
<p id="display"></p>
<div id="content">
<input type="text" id="input1">
</div>
<pre id="test">
<script>
SimpleTest.waitForExplicitFinish();
SimpleTest.waitForFocus(function() {
  let input = document.getElementById("input1");

  input.value = "ABC DEF";
  input.focus();
  input.setSelectionRange(4, 7, "backward");
  synthesizeKey("KEY_Backspace");
  is(input.value, "ABC ", "KEY_Backspace should remove selected string");
  synthesizeKey("Z", { accelKey: true });
  is(input.value, "ABC DEF", "Undo should restore string");
  synthesizeKey("KEY_ArrowLeft", { shiftKey: true });
  synthesizeKey("KEY_ArrowLeft", { shiftKey: true });
  synthesizeKey("KEY_Backspace");

  is(input.value, "AB", "anchor node and focus node should be kept order after undo");

  SimpleTest.finish();
});
</script>
</body>
</html>