1 files changed, 85 insertions, 0 deletions
diff --git a/dom/grid/test/chrome/test_grid_tracks.html b/dom/grid/test/chrome/test_grid_tracks.html
new file mode 100644
index 0000000000..39697ef799
--- /dev/null
+++ b/dom/grid/test/chrome/test_grid_tracks.html
@@ -0,0 +1,85 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<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>
+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>