<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>meta viewport test</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <meta name="viewport" content="width=320">
  <script src="viewport_helpers.js"></script>
</head>
<body>
  <p>width=320</p>
  <script type="application/javascript">
    "use strict";

    add_task(async function test1() {
      await SpecialPowers.pushPrefEnv(scaleRatio(1.0));

      let info = getViewportInfo(800, 80);
      is(info.defaultZoom, 2.5,   "initial zoom fits the displayWidth");
      is(info.width,       320,   "width is set explicitly");
      is(info.height,      40,   "height is at the absolute minimum");
      is(info.autoSize,    false, "width=device-width enables autoSize");
      is(info.allowZoom,   true,  "zooming is enabled by default");

      info = getViewportInfo(480, 800);
      is(info.defaultZoom, 1.5,   "initial zoom fits the new displayWidth");
      is(info.width,       320,   "explicit width is unchanged");
      is(info.height,      533,   "height changes proportional to displayHeight");
    });

    add_task(async function test2() {
      await SpecialPowers.pushPrefEnv(scaleRatio(1.5));

      // With an explicit width in CSS px, the scaleRatio has no effect.
      let info = getViewportInfo(800, 80);
      is(info.defaultZoom, 2.5,   "initial zoom still fits the displayWidth");
      is(info.width,       320,   "width is still set explicitly");
      is(info.height,      40,   "height is still minimum height");
    });
  </script>
</body>
</html>
