test_grid_fragmentation.html

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<!DOCTYPE HTML>

<!--

     Any copyright is dedicated to the Public Domain.

     http://creativecommons.org/publicdomain/zero/1.0/

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<html><head>

  <meta charset="utf-8">

  <title>CSS Grid Test: Fragmentation of height:auto grid, not top-of-page</title>

  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1144096">

  <link rel="help" href="https://drafts.csswg.org/css-grid/#pagination">

  <link rel="match" href="grid-fragmentation-001-ref.html">

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />

  <style type="text/css">

html,body {

    color:black; background-color:white; font-size:16px; padding:0; margin:0;

body { overflow:hidden; }

.columns {

  position:relative;

      -ms-columns: 5;

  -webkit-columns: 5;

          columns: 5;

      -ms-column-fill: auto;

  -webkit-column-fill: auto;

          column-fill: auto;

  border: 2px dashed;

  margin-bottom: 5px;

.grid {

  display: grid;

  grid-template-columns: 30px 30px 30px;

  grid-auto-rows: 50px;

  grid-gap: 12px;

  border:5px solid;

  align-content: start;

span { background:lime; border:1px solid black; }

x { display:block; height:20px; }

</style>

<script>

"use strict";

SimpleTest.waitForExplicitFinish();

function runTests() {

  var wrapper = document.getElementById("wrapper");

  var fragments = wrapper.getGridFragments();

  // test fragments of the grid

  is(fragments.length, 2, "Grid is split into two fragments.");

  if (fragments.length == 2) {

    var grid0 = fragments[0];

    var grid1 = fragments[1];

    // test that both fragments have one row track and two lines

    is(grid0.rows.tracks.length, 1, "Fragment 0 has one row track.");

    is(grid0.rows.lines.length, 2, "Fragment 0 has two row lines.");

    is(grid1.rows.tracks.length, 1, "Fragment 1 has one row track.");

    is(grid1.rows.lines.length, 2, "Fragment 1 has two row lines.");

  SimpleTest.finish();

</script>

</head>

<body onLoad="runTests();">

<div class="columns" style="height: 100px/*fragmentainer ends in the last row*/">

<div style="padding-top:10px; background:grey">

<div id="wrapper" class="grid">

<span style="grid-row:span 2"><x></x></span>

<span style="height:60px; background:cyan"><x></x></span>

<span style="align-self:end; background:pink"><x></x></span>

<span style="grid-row:1; height:60px"><x></x></span>

</div></div></div>

</body>

</html>