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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=904810
-->
<head>
  <title>Test for Bug 904810</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="text/javascript" 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=904810">Mozilla Bug 904810</a>
<p id="display">
<textarea dir="ltr" id="textarea904810">
first line
second line
third line
</textarea></p>
<div id="content" style="display: none">
  
</div>
<pre id="test">
<script type="application/javascript">

/** Test for Bug 904810 **/

SimpleTest.waitForExplicitFinish();

// We intermittently trigger two "Wrong parent style context" assertions
// on B2G emulator builds (bug XXXXXXX).  The two frames that get incorrect
// style context parents are scroll bar parts in the <textarea>.
SimpleTest.expectAssertions(0, 2);

SimpleTest.waitForFocus(function test() {
  function shiftLeft(i) {
    for ( ; i > 0; --i)
      synthesizeKey("VK_LEFT", {shiftKey:true});
  }

  function shiftRight(i) {
    for ( ; i > 0; --i)
      synthesizeKey("VK_RIGHT", {shiftKey:true});
  }

  const isWindows = /WINNT/.test(SpecialPowers.OS);
  
  var textarea = document.getElementById('textarea904810');
  textarea.focus();

  // Testing VK_DOWN with forward selection
  textarea.selectionStart = 1;
  textarea.selectionEnd = 1;
  shiftRight(7);
  synthesizeKey("VK_DOWN", {});
  if (isWindows) {
    is(textarea.selectionStart, 19, "caret moved to next line below selection end");
    is(textarea.selectionEnd, 19, "caret moved to next line below selection end");
  } else {
    is(textarea.selectionStart, 8, "caret moved to visual end of selection");
    is(textarea.selectionEnd, 8, "caret moved to visual end of selection");
  }

  // Testing VK_DOWN with backward selection
  textarea.selectionStart = 8;
  textarea.selectionEnd = 8;
  shiftLeft(7);
  synthesizeKey("VK_DOWN", {});
  if (isWindows) {
    is(textarea.selectionStart, 12, "caret moved to next line below selection start");
    is(textarea.selectionEnd, 12, "caret moved to next line below selection start");
  } else {
    is(textarea.selectionStart, 8, "caret moved to visual end of selection");
    is(textarea.selectionEnd, 8, "caret moved to visual end of selection");
  }

  // Testing VK_UP with forward selection
  textarea.selectionStart = 12;
  textarea.selectionEnd = 12;
  shiftRight(7);
  synthesizeKey("VK_UP", {});
  var result = textarea.selectionEnd
  if (isWindows) {
    is(textarea.selectionStart, 8, "caret moved to previous line above selection end");
    is(textarea.selectionEnd, 8, "caret moved to previous line above selection end");
  } else {
    is(textarea.selectionStart, 12, "caret moved to visual start of selection");
    is(textarea.selectionEnd, 12, "caret moved to visual start of selection");
  }

  // Testing VK_UP with backward selection
  textarea.selectionStart = 19;
  textarea.selectionEnd = 19;
  shiftLeft(7);
  synthesizeKey("VK_UP", {});
  var result = textarea.selectionEnd
  if (isWindows) {
    is(textarea.selectionStart, 1, "caret moved to previous line above selection start");
    is(textarea.selectionEnd, 1, "caret moved to previous line above selection start");
  } else {
    is(textarea.selectionStart, 12, "caret moved to visual start of selection");
    is(textarea.selectionEnd, 12, "caret moved to visual start of selection");
  }

 

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