devtools/server/tests/chrome/test_css-logic-media-queries.html


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<!DOCTYPE HTML>
<html>
<!--
Test that css-logic handles media-queries correctly
-->
<head>
  <meta charset="utf-8">
  <title>Test css-logic media-queries</title>
  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
  <style>
    div {
      width: 1000px;
      height: 100px;
      background-color: #f00;
    }

    @media screen and (min-width: 1px) {
      div {
        width: 200px;
      }
    }
  </style>
</head>
<body>
  <div></div>
  <script type="application/javascript">
  "use strict";

  window.onload = function() {
    const {require} = ChromeUtils.importESModule("resource://devtools/shared/loader/Loader.sys.mjs");
    const {CssLogic} = require("devtools/server/actors/inspector/css-logic");

    SimpleTest.waitForExplicitFinish();

    const div = document.querySelector("div");
    const cssLogic = new CssLogic();
    cssLogic.highlight(div);
    cssLogic.processMatchedSelectors();

    const _strings = Services.strings
      .createBundle("chrome://devtools-shared/locale/styleinspector.properties");

    const inline = _strings.GetStringFromName("rule.sourceInline");

    const source1 = inline + ":2";
    const source2 = inline + ":9 @media screen and (min-width: 1px)";
    is(cssLogic._matchedRules[0][0].source, source1,
      "rule.source gives correct output for rule 1");
    is(cssLogic._matchedRules[1][0].source, source2,
      "rule.source gives correct output for rule 2");

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