test_bug509244.html (1097B)
1 <!DOCTYPE HTML> 2 <html> 3 <!-- 4 https://bugzilla.mozilla.org/show_bug.cgi?id=509244 5 --> 6 <head> 7 <title>Test for Bug 509244</title> 8 <script src="/tests/SimpleTest/SimpleTest.js"></script> 9 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> 10 </head> 11 <body> 12 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=509244">Mozilla Bug 509244</a> 13 <p id="display">A</p> 14 <div id="content" style="display: none"> 15 16 </div> 17 <pre id="test"> 18 <script type="application/javascript"> 19 20 /** Test for Bug 509244 */ 21 22 function flush() { document.documentElement.offsetHeight; } 23 24 var text = document.getElementById("display"); 25 26 // layout text, caching monospace font 27 text.style.fontFamily = "monospace"; 28 flush(); 29 // relayout text so that monospace font is no longer used (but cached) 30 text.style.fontFamily = "sans-serif"; 31 flush(); 32 33 // flush cache 34 SpecialPowers.Services.obs.notifyObservers(null, "memory-pressure", "heap-minimize"); 35 36 // reuse font that was flushed from cache 37 text.style.fontFamily = "monospace"; 38 flush(); 39 40 ok(true, "not crashed"); 41 42 </script> 43 </pre> 44 </body> 45 </html>