LayoutTests/transitions/transition-display-property.html

<style>
test { transition:0.1s; display:block; height:100px; border: 2px solid green; }
.animate { display:inline-block; height:10px; width:10px; }
</style>
<test></test>
<script>
var test = document.querySelector("test");
var count = 0;
function testUntilComplete()
{
    if (test.offsetWidth == 10 || ++count == 10)
        testRunner.notifyDone();
    else
        setTimeout(testUntilComplete, 0.1);
}

if (window.testRunner) {
    testRunner.waitUntilDone();
    testUntilComplete();
}
test.offsetWidth;
test.className = "animate";
</script>