src/third_party/web_platform_tests/vibration/silent-ignore.html

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  <head>
    <meta charset='utf-8'/>
    <title>Vibration API: test that calls to vibrate() are silently ignored when the device cannot vibrate</title>
    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
    <meta name='flags' content='dom, no-vibrator'/>
    <meta name='assert' content='If the device does not provide a vibration mechanism, or it is disabled, the user agent must silently ignore any invocations of the vibrate() method.'/>
    <link rel='stylesheet' href='/resources/testharness.css' media='all'/>
  </head>
  <body>
    <h1>Description</h1>
    <p>
      <strong>This test is only useful on devices that do not have vibration capability</strong>.
      If your device supports vibration, then <strong>skip</strong> this test. An implementation
      supporting this API but running on a device that cannot vibrate must silently ignore the
      call (we test that it doesn't throw).
    </p>
    <div id='log'></div>
    <script src='/resources/testharness.js'></script>
    <script src='/resources/testharnessreport.js'></script>
    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
    <script>
      if (undefined !== navigator.vibrate) {
          test(function () {
              assert_true(navigator.vibrate(1000), "vibrate() returns true when vibration is not supported");
          }, "Calling vibrate returns true");
      }
    </script>
  </body>
</html>