<!DOCTYPE HTML> <html> <!-- Test that setVisible() changes a process's priority. --> <head> <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script> <script type="application/javascript" src="../browserElementTestHelpers.js"></script> <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/> </head> <body> <script type="application/javascript;version=1.7"> "use strict"; SimpleTest.waitForExplicitFinish(); browserElementTestHelpers.setEnabledPref(true); browserElementTestHelpers.enableProcessPriorityManager(); function runTest() { var iframe = document.createElement('iframe'); iframe.setAttribute('mozbrowser', true); iframe.src = browserElementTestHelpers.emptyPage1; var childID = null; Promise.all([ expectOnlyOneProcessCreated('FOREGROUND').then(function(chid) { childID = chid; }), expectMozbrowserEvent(iframe, 'loadend') ]).then(function() { // Mark the frame as not visible. This should cause its priority to drop // to BACKGROUND. var p = expectPriorityChange(childID, 'BACKGROUND'); iframe.setVisible(false); return p; }).then(function() { // Mark the frame as visible again. This should cause its priority change // back to FOREGROUND. var p = expectPriorityChange(childID, 'FOREGROUND'); iframe.setVisible(true); return p; }).then(SimpleTest.finish); document.body.appendChild(iframe); } addEventListener('testready', runTest); </script> </body> </html>