chromium/third_party/blink/web_tests/external/wpt/css/css-grid/layout-algorithm/auto-margins-ignored-during-track-sizing-001.html

<!DOCTYPE html>
<title>CSS Grid: grid items using 'auto' margins.</title>
<link rel="author" title="Javier Fernendez" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-grid/#auto-margins">
<link rel="help" href="https://drafts.csswg.org/css-grid/#layout-algorithm">
<link rel="match" href="references/auto-margins-ignored-during-track-sizing-001-ref.html">
<meta name="assert" content="This test ensures that 'auto' margin is treated as 0px during the tracks sizing algorithm."/>
<style>
body { overflow: hidden; }
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
}
.margin-center {
  margin-top: 10px;
  margin-left: auto;
  margin-right: auto;
}
.i1 { background: magenta;  }
.i2 { background: cyan; }
.i3 { background: yellow; }
.i4 { background: lime; }
</style>
<p>This test pass if the 3 items in the first row have the same size filling the whole viewport's width and the item in the second row is centered in the first column.<p>
<div class="grid">
  <div class="i1">
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  </div>
  <div class="i2">
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  </div>
  <div class="i3">
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  </div>
  <div class="i4 margin-center">Learn More</a>
</div>