test_supports_rules.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=649740

-->

<head>

  <title>Test for Bug 649740</title>

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

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

  <style id="style">

  </style>

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=649740">Mozilla Bug 649740</a>

<p id="display1"></p>

<p id="display2"></p>

<pre id="test">

<script type="application/javascript">

/** Test for Bug 649740 **/

function condition(s) {

  return s.replace(/^@supports\s*/, '').replace(/ \s*{\s*}\s*$/, '');

var styleSheetText =

  "@supports(color: green){ }\n" +

  "@supports (color: green) { }\n" +

  "@supports ((color: green)) { }\n" +

  "@supports (color: green) and (color: blue) { }\n" +

  "@supports ( Font:  20px serif ! Important)  { }";

function runTest() {

  var style = document.getElementById("style");

  style.textContent = styleSheetText;

  var sheet = style.sheet;

  is(condition(sheet.cssRules[0].cssText), "(color: green)");

  is(condition(sheet.cssRules[1].cssText), "(color: green)");

  is(condition(sheet.cssRules[2].cssText), "((color: green))");

  is(condition(sheet.cssRules[3].cssText), "(color: green) and (color: blue)");

  is(condition(sheet.cssRules[4].cssText), "( Font:  20px serif ! Important)");

  var cs1 = getComputedStyle(document.getElementById("display1"), "");

  var cs2 = getComputedStyle(document.getElementById("display2"), "");

  function check_balanced_condition(condition_inner, expected_match) {

    style.textContent = "#display1, #display2 { text-decoration: overline }\n" +

                        "@supports " + condition_inner + "{\n" +

                        "  #display1 { text-decoration: line-through }\n" +

                        "}\n" +

                        "#display2 { text-decoration: underline }\n";

    is(cs1.textDecorationLine,

       expected_match ? "line-through" : "overline",

       "@supports condition \"" + condition_inner + "\" should " +

       (expected_match ? "" : "NOT ") + "match");

    is(cs2.textDecorationLine, "underline",

       "@supports condition \"" + condition_inner + "\" should be balanced");

  check_balanced_condition("not (color: green)", false);

  check_balanced_condition("not (colour: green)", true);

  check_balanced_condition("not(color: green)", false);

  check_balanced_condition("not(colour: green)", false);

  check_balanced_condition("not/* */(color: green)", false);

  check_balanced_condition("not/* */(colour: green)", true);

  check_balanced_condition("not /* */ (color: green)", false);

  check_balanced_condition("not /* */ (colour: green)", true);

  check_balanced_condition("(color: green) and (color: blue)", true);

  check_balanced_condition("(color: green) /* */ /* */ and /* */ /* */ (color: blue)", true);

  check_balanced_condition("(color: green) and(color: blue)", false);

  check_balanced_condition("(color: green) and/* */(color: blue)", true);

  check_balanced_condition("(color: green)and (color: blue)", true);

  check_balanced_condition("(color: green) or (color: blue)", true);

  check_balanced_condition("(color: green) /* */ /* */ or /* */ /* */ (color: blue)", true);

  check_balanced_condition("(color: green) or(color: blue)", false);

  check_balanced_condition("(color: green) or/* */(color: blue)", true);

  check_balanced_condition("(color: green)or (color: blue)", true);

  SimpleTest.finish();

SimpleTest.waitForExplicitFinish();

runTest();

</script>

</pre>

</body>

</html>