css/css-grid/alignment/grid-alignment-style-changes-002.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Changing Self-Alignment properties to interfere in Baseline Alignment</title>
<link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-grid-1/#grid-align">
<link rel="help" href="https://drafts.csswg.org/css-align-3/#self-alignment">
<link rel="help" href="https://drafts.csswg.org/css-align-3/#align-self-property">
<link rel="help" href="https://drafts.csswg.org/css-align-3/#typedef-baseline-position">
<meta name="assert" content="Changing the 'align-self' property's value of a grid item to 'baseline' will include such item into a baseline context, which implies recomputing all the baseline offsets and aligning the items in such context.">
<style>
#container {
  position: relative;
  display: inline-grid;
  grid: 100px / 50px 50px 50px;
  background: grey;
  align-items: baseline;
}
#item1 {
  height: 20px;
  background: blue;
}
#item2 {
  height: 50px;
  background: green;
  align-self: center;
}
#item3 {
  height: 30px;
  background: red;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script src="support/style-change.js"></script>
<script>
function runTest() {
    let before = {
        item1: {"data-offset-y": 10 },
        item2: {"data-offset-y": 25 },
        item3: {"data-offset-y": 0  }
    };

    let after = {
        item1: {"data-offset-y": 30 },
        item2: {"data-offset-y": 0  },
        item3: {"data-offset-y": 20 }
    };

    evaluateStyleChangeMultiple("before", before);
    item2.style.alignSelf = "baseline";
    evaluateStyleChangeMultiple("after", after);
    done();
}
</script>
<body onload="runTest()">
    <div id="container">
        <div id="item1" data-expected-width="50" data-expected-height="20" data-offset-x="0"></div>
        <div id="item2" data-expected-width="50" data-expected-height="50" data-offset-x="50"></div>
        <div id="item3" data-expected-width="50" data-expected-height="30" data-offset-x="100"></div>
    </div>
    <div id="log"></div>
</body>