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<!doctype html>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<link rel="author" title="Richard Townsend" href="Richard.Townsend@arm.com" />
<link rel="help" href="https://drafts.csswg.org/css-tables-3/#computing-column-measures" />
<style type="text/css">
td {
padding: 0;
}
div {
/* Bug does not happen when the table's containing block is less
than (100+200+300)=600px, so make sure sure that it's larger. */
width: 750px;
}
</style>
<div>
<h1>Width Distribution</h1>
<h4>"Computing column measures"</h4>
<p>This is testing that the table's auto columns are correctly recalculated after removing and adding a <code>col</code> element.
<a href="https://www.w3.org/TR/CSS2/tables.html#auto-table-layout">Spec Text</a></p>
<hr/>
<table id="one" style="border: 1px solid orange">
<colgroup>
<col style="width: 100px" />
<col style="width: 200px" />
<col style="width: 300px;" id="hideable" />
</colgroup>
<tr>
<td>100</td>
<td>200</td>
<td>300</td>
</tr>
</table>
<table id="two" style="border: 1px solid orange">
<colgroup>
<col style="width: 100px; display: none;" id="displayable" />
<col style="width: 200px;" />
<col style="width: auto;" />
</colgroup>
<tr>
<td>100</td>
<td>200</td>
<td>300</td>
</tr>
</table>
<table id="ref" style="border: 1px solid orange">
<colgroup>
<col style="width: 100px;" />
<col style="width: 200px;" />
<col style="width: auto;" />
</colgroup>
<tr>
<td>100</td>
<td>200</td>
<td>300</td>
</tr>
</table>
</div>
<script>
test(function() {
var one = document.getElementById('one');
var two = document.getElementById('two');
var ref = document.getElementById('ref');
// Force initial layout.
assert_greater_than(one.offsetWidth, ref.offsetWidth);
// Display two's colgroup and hide one's.
document.getElementById('displayable').style.display = 'table-column';
document.getElementById('hideable').style.display = 'none';
// Both tables should now match the reference.
assert_equals(one.offsetWidth, ref.offsetWidth);
assert_equals(two.offsetWidth, ref.offsetWidth);
}, "Table recalculations should match the reference");
</script>
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