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<!DOCTYPE HTML>
<html>
<head>
  <meta charset=utf-8>
  <title>Bug 892929 test</title>
  <link rel="author" title="John Daggett" href="mailto:jdaggett@mozilla.com">
  <link rel="help" href="http://www.w3.org/TR/css-fonts-3/#om-fontfeaturevalues" />
  <meta name="assert" content="window.CSSFontFeatureValuesRule should only appear when layout.css.font-features.enabled is true" />
  <script type="text/javascript" src="/resources/testharness.js"></script>
  <script type="text/javascript" src="/resources/testharnessreport.js"></script>
  <style type="text/css">
  </style>
</head>
<body>
<div id="log"></div>
<pre id="display"></pre>

<script type="text/javascript">

function testCSSFontFeatureValuesRuleOM() {
  var s = document.documentElement.style;
  var cs = window.getComputedStyle(document.documentElement);

  var hasFFVRule = "CSSFontFeatureValuesRule" in window;
  var hasStyleAlternates = "fontVariantAlternates" in s;
  var hasCompStyleAlternates = "fontVariantAlternates" in cs;

  test(function() {
    assert_equals(hasFFVRule,
                  hasStyleAlternates,
                  "style.fontVariantAlternates " +
                    (hasStyleAlternates ? "available" : "not available") +
                    " but " +
                    "window.CSSFontFeatureValuesRule " +
                    (hasFFVRule ? "available" : "not available") +
                    " - ");
  }, "style.fontVariantAlternates availability matches window.CSSFontFeatureValuesRule availability");

  test(function() {
    assert_equals(hasFFVRule,
                  hasCompStyleAlternates,
                  "computedStyle.fontVariantAlternates " +
                    (hasCompStyleAlternates ? "available" : "not available") +
                    " but " +
                    "window.CSSFontFeatureValuesRule " +
                    (hasFFVRule ? "available" : "not available") +
                    " - ");
  }, "computedStyle.fontVariantAlternates availability matches window.CSSFontFeatureValuesRule availability");

  // if window.CSSFontFeatureValuesRule isn't around, neither should any of the font feature props
  fontFeatureProps = [ "fontKerning", "fontVariantAlternates", "fontVariantCaps", "fontVariantEastAsian",
                       "fontVariantLigatures", "fontVariantNumeric", "fontVariantPosition", "fontSynthesis",
                       "fontFeatureSettings", "fontLanguageOverride" ];

  if (!hasFFVRule) {
    var i;
    for (i = 0; i < fontFeatureProps.length; i++) {
      var prop = fontFeatureProps[i];
      test(function() {
             assert_true(!(prop in s), "window.CSSFontFeatureValuesRule not available but style." + prop + " is available - ");
           }, "style." + prop + " availability");
      test(function() {
             assert_true(!(prop in cs), "window.CSSFontFeatureValuesRule not available but computedStyle." + prop + " is available - ");
           }, "computedStyle." + prop + " availability");
    }
  }

}

testCSSFontFeatureValuesRuleOM();

</script>
</body>
</html>