<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>replace meta viewport content</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <meta id="viewport" name="viewport" content="width=device-width, initial-scale=1">
  <script src="viewport_helpers.js"></script>
</head>
<body>
  <script type="application/javascript">
    "use strict";

    add_task(async function replace_content() {
      await SpecialPowers.pushPrefEnv(scaleRatio(1.0));

      let info = getViewportInfo(800, 480);
      info = getViewportInfo(800, 480);
      is(info.defaultZoom, 1, "initial zoom is 1");
      is(info.width, 800, "width should be 800");
      is(info.height, 480, "height should be 480");

      // Now the content has only 'width=1080'.
      // eslint-disable-next-line no-undef
      viewport.setAttribute("content", "width=1080");
      info = getViewportInfo(800, 480);

      fuzzeq(info.defaultZoom, 800/1080, "initial scale is calculated by the given width");
      is(info.minZoom, 0.25, "minimum scale defaults to the absolute minimum");
      is(info.maxZoom, 10, "maximum scale defaults to the absolute maximum");
      is(info.width, 1080, "width is the given width");
      is(info.height, 480*1080/800, "height is proportional to displayHeight");
      is(info.autoSize, false, "autoSize is disabled by default");
      is(info.allowZoom, true, "zooming is enabled by default");
    });
  </script>
</body>
</html>
