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+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+<style>
+body {
+ margin: 40px;
+}
+.wrapper {
+ display: grid;
+ width: 400px;
+ grid-gap: 10px;
+ grid-template-columns: 100px 1fr 1fr 100px;
+ background-color: #f00;
+}
+.box {
+ background-color: #444;
+ color: #fff;
+}
+</style>
+
+<script>
+'use strict';
+
+SimpleTest.waitForExplicitFinish();
+
+function runTests() {
+ var wrapper = document.getElementById("wrapper");
+ var grid = wrapper.getGridFragments()[0];
+ var boxA = document.getElementById("boxA");
+ var boxB = document.getElementById("boxB");
+
+ // test property existence
+ isnot(typeof(grid.cols.tracks), "undefined", "Grid.cols.tracks property exists.");
+ isnot(typeof(grid.rows.tracks), "undefined", "Grid.rows.tracks property exists.");
+
+ if ((typeof(grid.cols.tracks) != "undefined") &&
+ (typeof(grid.rows.tracks) != "undefined")) {
+ // test column and row track counts
+ is(grid.cols.tracks.length, 4,
+ "Grid.cols.tracks property has length that matches grid-template-columns."
+ );
+ is(grid.rows.tracks.length, 2,
+ "Grid.rows.tracks property has length that matches content."
+ );
+
+ if((grid.cols.tracks.length == 4) &&
+ (grid.rows.tracks.length == 2)) {
+ // test column track position
+ is(grid.cols.tracks[1].start, 110, "Grid column track 2 position is as expected.");
+
+ // test column track width
+ is(grid.cols.tracks[0].breadth, boxA.offsetWidth,
+ "Grid column track width (fixed size) matches item width."
+ );
+ is(grid.cols.tracks[1].breadth, boxB.offsetWidth,
+ "Grid column track width (flexible size) matches item width."
+ );
+ is(grid.cols.tracks[1].breadth, grid.cols.tracks[2].breadth,
+ "Grid column track widths with equal proportion flexible size actually are same size."
+ );
+ }
+ }
+
+ SimpleTest.finish();
+}
+</script>
+</head>
+<body onLoad="runTests();">
+
+ <div id="wrapper" class="wrapper">
+ <div id="boxA" class="box a">A</div>
+ <div id="boxB" class="box b">B</div>
+ <div class="box c">C</div>
+ <div class="box d">D</div>
+ <div class="box e">E</div>
+ <div class="box f">F</div>
+ <div class="box g">G</div>
+ <div class="box h">H</div>
+ </div>
+
+</body>
+</html>