1 files changed, 29 insertions, 0 deletions
diff --git a/layout/style/test/slow_load.sjs b/layout/style/test/slow_load.sjs
new file mode 100644
index 0000000000..3873f466ce
--- /dev/null
+++ b/layout/style/test/slow_load.sjs
@@ -0,0 +1,29 @@
+// Make sure our timer stays alive.
+let gTimer;
+
+function handleRequest(request, response) {
+  let isCss = request.queryString.indexOf("css") != -1;
+
+  response.setHeader("Content-Type", isCss ? "text/css" : "text/plain", false);
+  response.setStatusLine("1.1", 200, "OK");
+  response.processAsync();
+
+  let time = Date.now();
+
+  gTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+  // Wait for 1s before responding; this should usually make sure this load comes in last.
+  gTimer.init(
+    () => {
+      if (isCss) {
+        // FIXME(emilio): This clamps the date to the 32-bit integer range which
+        // is what we use to store the z-index... We don't seem to store f64s
+        // anywhere in the specified values...
+        time = time % (Math.pow(2, 31) - 1);
+        response.write(":root { z-index: " + time + "}");
+      }
+      response.finish();
+    },
+    1000,
+    Ci.nsITimer.TYPE_ONE_SHOT
+  );
+}