test_meta_viewport4.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"/>

  <meta name="viewport" content="initial-scale=1.0, user-scalable=no">

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

</head>

<body>

  <p>initial-scale=1.0, user-scalable=no</p>

  <script type="application/javascript">

    "use strict";

    add_task(async function test1() {

      await SpecialPowers.pushPrefEnv(scaleRatio(1.0));

      let info = getViewportInfo(800, 480);

      is(info.defaultZoom, 1,     "initial zoom is set explicitly");

      is(info.width,       800,   "width fits the initial zoom level");

      is(info.height,      480,   "height fits the initial zoom level");

      is(info.autoSize,    true,  "initial-scale=1 enables autoSize");

      is(info.allowZoom,   false, "zooming is explicitly disabled");

      info = getViewportInfo(480, 800);

      is(info.defaultZoom, 1,     "initial zoom is still set explicitly");

      is(info.width,       480,   "width changes to match the displayWidth");

      is(info.height,      800,   "height changes to match the displayHeight");

});

    add_task(async function test2() {

      await SpecialPowers.pushPrefEnv(scaleRatio(1.5));

      let info = getViewportInfo(800, 480);

      is(info.defaultZoom, 1.5,   "initial zoom is adjusted for device pixel ratio");

      is(info.width,       533,   "width fits the initial zoom");

      is(info.height,      320,   "height fits the initial zoom");

});

  </script>

</body>

</html>