chrome/test/data/prerender/prerender_visibility.html

   1 <html>
   2 <!--
   3 This test checks the visibility API when a prerendered page is displayed.
   4 -->
   5 <head>
   6 <title>Prerender Visibility</title>
   7
   8 <script src="prerender_visibility_shared.js"></script>
   9
  10 <script>
  11 // Checks that no visibility change events have occurred, current visibility
  12 // state is "prerender", and visibility state while the page was loading was
  13 // also "prerender".
  14 function DidPrerenderPass() {
  15   return visibilityStates.length == 1 &&
  16          hiddenValues.length == 1 &&
  17          visibilityStates[0] == 'prerender' &&
  18          hiddenValues[0] == true &&
  19          document.visibilityState == 'prerender' &&
  20          document.hidden == true;
  21 }
  22
  23 // Checks that we've only had three visibility states:
  24 //   prerender -> hidden -> visible.
  25 // Also checks current visibility state.
  26 function DidDisplayPass() {
  27   return visibilityStates.length == 3 &&
  28          hiddenValues.length == 3 &&
  29          visibilityStates[1] == 'hidden' &&
  30          hiddenValues[1] == true &&
  31          visibilityStates[2] == 'visible' &&
  32          hiddenValues[2] == false &&
  33          document.visibilityState == 'visible' &&
  34          document.hidden == false;
  35 }
  36 </script>
  37
  38 </head>
  39 <body></body>
  40 </html>