css/css-grid/grid-definition/grid-auto-repeat-min-size-003.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Auto repeat tracks and percentage min sizes with percentage track sizes</title>
<link rel="author" title="Jacques Newman" href="mailto:janewman@microsoft.com">
<link rel="help" href="https://drafts.csswg.org/css-grid-1/#auto-repeat">
<meta name="assert"
  content="This test checks that auto repeat tracks can use percentage track
  size when only a min size is available to compute the number of tracks.">
<link rel="stylesheet" href="/css/support/grid.css">
<style>
  .grid {
    position: relative;
    display: inline-grid;
    grid-template-columns: repeat(auto-fill, 25%);
    grid-auto-rows: 100px;
    min-width: 50%;
    float: left;
  }

  .wrapper {
    width: 600px;
  }

  #cell {
    background: lime;
  }
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>

<body onload="checkLayout('.grid');">

  <div id="log"></div>

  <div class="wrapper">
    <div class="grid" data-expected-width="300" data-expected-height="200">
      <div id="cell" data-expected-width="75">Cell 1</div>
      <div id="cell" data-expected-width="75">Cell 2</div>
      <div id="cell" data-expected-width="75">Cell 3</div>
      <div id="cell" data-expected-width="75">Cell 4</div>
      <div id="cell" data-expected-width="75">Cell 5</div>
    </div>
  </div>