<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=717878 --> <head> <meta charset="utf-8"> <title>Test for Bug 717878</title> <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=717878">Mozilla Bug 717878</a> <p id="display"></p> <div id="content" style="display: none"> </div> <!-- size=10 and monospace font ensure there's no overflow in either direction --> <input id="no-overflow" type="text" size="10" style=" font-family: monospace; font-size: 1em;" value="Short"> <!-- size=10, monospace font, and height=0.5em ensure overflow in both directions --> <input id="overflow" type="text" size="10" style=" font-family: monospace; font-size: 1em; height: 0.5em;" value="This is a long string"> <pre id="test"> <script type="application/javascript"> /** Test for Bug 717878 **/ /** * Test an element's scroll properties for correctness * * @param element Element to test * @param prop Specify the property to test, * i.e. "scrollLeft" or "scrollTop" * @param propMax Specify the scrollMax property to test, * i.e. "scrollLeftMax" or "scrollTopMax" * @param is_overflow Specify whether the element is * scrollable in the above direction */ function test_scroll(element, scroll, scrollMax, is_overflow) { is(element[scroll], 0, element.id + " initial " + scroll + " != 0"); if (is_overflow) { isnot(element[scrollMax], 0, element.id + " " + scrollMax + " == 0"); } else { is(element[scrollMax], 0, element.id + " " + scrollMax + " != 0"); } element[scroll] = 10; if (is_overflow) { isnot(element[scroll], 0, element.id + " unable to scroll " + scroll); } else { is(element[scroll], 0, element.id + " able to scroll " + scroll); } element[scroll] = element[scrollMax]; is(element[scroll], element[scrollMax], element.id + " did not scroll to " + scrollMax); element[scroll] = element[scrollMax] + 10; is(element[scroll], element[scrollMax], element.id + " scrolled past " + scrollMax); } var no_overflow = document.getElementById("no-overflow"); test_scroll(no_overflow, "scrollLeft", "scrollLeftMax", /* is_overflow */ false); test_scroll(no_overflow, "scrollTop", "scrollTopMax", /* is_overflow */ false); var overflow = document.getElementById("overflow"); test_scroll(overflow, "scrollLeft", "scrollLeftMax", /* is_overflow */ true); test_scroll(overflow, "scrollTop", "scrollTopMax", /* is_overflow */ true); </script> </pre> </body> </html>