diff -r 000000000000 -r 6474c204b198 browser/devtools/framework/test/browser_toolbox_tool_ready.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/framework/test/browser_toolbox_tool_ready.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,40 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  addTab().then(function(data) {
+    data.target.makeRemote().then(performChecks.bind(null, data));
+  }).then(null, console.error);
+
+  function performChecks(data) {
+    let toolIds = gDevTools.getToolDefinitionArray()
+                    .filter(def => def.isTargetSupported(data.target))
+                    .map(def => def.id);
+
+    let open = function(index) {
+      let toolId = toolIds[index];
+
+      info("About to open " + index + "/" + toolId);
+      gDevTools.showToolbox(data.target, toolId).then(function(toolbox) {
+        ok(toolbox, "toolbox exists for " + toolId);
+        is(toolbox.currentToolId, toolId, "currentToolId should be " + toolId);
+
+        let panel = toolbox.getCurrentPanel();
+        ok(panel.isReady, toolId + " panel should be ready");
+
+        let nextIndex = index + 1;
+        if (nextIndex >= toolIds.length) {
+          toolbox.destroy().then(function() {
+            gBrowser.removeCurrentTab();
+            finish();
+          });
+        }
+        else {
+          open(nextIndex);
+        }
+      }, console.error);
+    };
+
+    open(0);
+  }
+}