test_meta_viewport0.html

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<!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"/>

  <script src="viewport_helpers.js"></script>

</head>

<body>

  <p>No &lt;meta name="viewport"&gt; tag</p>

  <script type="application/javascript">

    "use strict";

    add_task(async function test1() {

      await SpecialPowers.pushPrefEnv(scaleRatio(1.0));

      let info = getViewportInfo(800, 480);

      fuzzeq(info.defaultZoom, 0.25, "initial scale is clamped to the default mimumim scale");

      fuzzeq(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,       980,      "width is the default width");

      is(info.height,      588,      "height is proportional to displayHeight");

      is(info.autoSize,    false,    "autoSize is disabled by default");

      is(info.allowZoom,   true,     "zooming is enabled by default");

      info = getViewportInfo(490, 600);

      is(info.width,       980,     "width is still the default width");

      is(info.height,      1200,    "height is proportional to the new displayHeight");

});

    add_task(async function test2() {

      await SpecialPowers.pushPrefEnv(scaleRatio(1.5));

      let info = getViewportInfo(800, 480);

      is(info.width,       980,     "width is still the default width");

      is(info.height,      588,     "height is still proportional to displayHeight");

});

  </script>

</body>

</html>