css/css-grid/grid-items/grid-minimum-size-grid-items-003.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Minimum size of grid items</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<link rel="help" href="http://www.w3.org/TR/css-grid-1/#min-size-auto" title="6.6. Implied Minimum Size of Grid Items">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<meta name="assert" content="Checks that minimum size for grid items is the specified size regardless of the content size.">
<style>
  #reference-overlapped-red {
    position: absolute;
    background-color: red;
    width: 100px;
    height: 100px;
    z-index: -1;
  }

  #constrained-grid {
    display: grid;
    width: 10px;
    height: 10px;
  }

  #test-grid-item-overlapping-green {
    background-color: green;
    width: 100px;
    height: 100px;
  }

  #content-500x500 {
    width: 500px;
    height: 500px;
  }
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div id="reference-overlapped-red"></div>
<div id="constrained-grid">
  <div id="test-grid-item-overlapping-green">
    <div id="content-500x500"></div>
  </div>
</div>