LayoutTests/fast/multicol/gap-non-negative.html

<p>
    Test for <i><a href="rdar://problem/5962118">rdar://problem/5962118</a> Crash in RenderBlock::calcColumnWidth()</i>.
</p>
<p>
    This tests that the <tt>column-gap</tt> property does not allow negative values.
</p>
<p id = "result"></p>
<div id="target" style="-webkit-column-count: 4; -webkit-column-gap: -10px;"></div>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();

    var style = getComputedStyle(document.getElementById("target"));
    var columnGap = style.getPropertyValue("-webkit-column-gap");
    document.getElementById("result").innerText = (columnGap == "0" || columnGap == "normal") ? "PASS" : "FAIL: column-gap is " + columnGap;
</script>