css/css-multicol/multicol-width-004.html

<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>CSS Multi-column Layout Test: Test width:min-content for a multi-column container with column-span:all children</title>
  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
  <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#column-span">
  <link rel="help" href="https://drafts.csswg.org/css-sizing-3/#sizing-properties">
  <link rel="match" href="multicol-width-004-ref.html">
  <meta name="assert" content="This test checks the width:min-content for a multi-column container is calculated correctly.">

  <style>
  article {
    width: min-content;
    border: 1px solid black;
    column-gap: 10px;
  }
  .block {
    width: 100px;
    background-color: yellow;
  }
  .spanner {
    column-span: all;
    background-color: lime;
  }
  </style>

  <!-- Case 1: column-width is specified, and spanner's width is less than
       column-width, so <article>'s expected width is 80px. -->
  <article style="column-width: 80px;">
    <div class="block">block1</div>
    <div class="spanner" style="width: 50px;">spanner</div>
    <div class="block">block2</div>
  </article>
  <br>

  <!-- Case 2: like case 1, but spanner's width is larger than column-width.
       Thus <article>'s expected width is 150px; -->
  <article style="column-width: 80px;">
    <div class="block">block1</div>
    <div class="spanner" style="width: 150px;">spanner</div>
    <div class="block">block2</div>
  </article>
  <br>

  <!-- Case 3: column-count is specified. Thus <article>'s expected width is two
       column boxes wide plus the column-gap, i.e. 100px*2 + 10px = 210px. -->
  <article style="column-count: 2;">
    <div class="block">block1</div>
    <div class="spanner">spanner</div>
    <div class="block">block2</div>
  </article>
  <br>

  <!-- Case 4: like case 3, but the spanner's width is larger. Thus <article>'s
       expected width is 250px. -->
  <article style="column-count: 2;">
    <div class="block">block1</div>
    <div class="spanner" style="width: 250px;">spanner</div>
    <div class="block">block2</div>
  </article>
</html>