css/css-grid/grid-items/grid-items-sizing-alignment-001.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Grid Item Sizing</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<link rel="help" href="https://www.w3.org/TR/css-grid-1/#grid-item-sizing">
<link rel="match" href="grid-items-sizing-alignment-001-ref.html" />
<meta name="assert" content="Checks how alignment properties affect the size of the non-replaced vs replaced grid items.">
<style>
  #grid {
    display: grid;
    grid-auto-rows: 200px;
    grid-template-columns: repeat(3, 200px);
  }
  button {
    margin: 0; /* Prevent WebKit from adding some margin */
  }
</style>

<p>Test passes if it has the same output than the reference.</p>

<div id="grid">
  <button style="align-self: normal; justify-self: normal;">Stretched button (200x200)</button>
  <button style="align-self: stretch; justify-self: stretch;">Stretched button (200x200)</button>
  <button style="align-self: start; justify-self: start;">Regular button</button>
  <img src="support/50x50-green.png" alt="Image download support must be enabled"
    style="align-self: normal; justify-self: normal;" />
  <img src="support/50x50-green.png" alt="Image download support must be enabled"
    style="align-self: stretch; justify-self: stretch;" />
  <img src="support/50x50-green.png" alt="Image download support must be enabled"
    style="align-self: start; justify-self: start;" />
</div>