diff -r 000000000000 -r 6474c204b198 browser/devtools/tilt/test/browser_tilt_picking_delete.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/tilt/test/browser_tilt_picking_delete.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,76 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+let nodeDeleted = false;
+let presenter;
+
+function test() {
+  if (!isTiltEnabled()) {
+    info("Skipping picking delete test because Tilt isn't enabled.");
+    return;
+  }
+  if (!isWebGLSupported()) {
+    info("Skipping picking delete test because WebGL isn't supported.");
+    return;
+  }
+
+  waitForExplicitFinish();
+
+  createTab(function() {
+    createTilt({
+      onTiltOpen: function(instance)
+      {
+        presenter = instance.presenter;
+        Services.obs.addObserver(whenNodeRemoved, NODE_REMOVED, false);
+
+        presenter._onSetupMesh = function() {
+          let p = getPickablePoint(presenter);
+
+          presenter.highlightNodeAt(p[0], p[1], {
+            onpick: function()
+            {
+              ok(presenter._currentSelection > 0,
+                "Highlighting a node didn't work properly.");
+              ok(!presenter._highlight.disabled,
+                "After highlighting a node, it should be highlighted. D'oh.");
+
+              nodeDeleted = true;
+              presenter.deleteNode();
+            }
+          });
+        };
+      }
+    }, false, function suddenDeath()
+    {
+      info("Tilt could not be initialized properly.");
+      cleanup();
+    });
+  });
+}
+
+function whenNodeRemoved() {
+  ok(presenter._currentSelection > 0,
+    "Deleting a node shouldn't change the current selection.");
+  ok(presenter._highlight.disabled,
+    "After deleting a node, it shouldn't be highlighted.");
+
+  let nodeIndex = presenter._currentSelection;
+  let vertices = presenter._meshStacks[0].vertices.components;
+
+  for (let i = 0, k = 36 * nodeIndex; i < 36; i++) {
+    is(vertices[i + k], 0,
+      "The stack vertices weren't degenerated properly.");
+  }
+
+  executeSoon(function() {
+    Services.obs.addObserver(cleanup, DESTROYED, false);
+    Tilt.destroy(Tilt.currentWindowId);
+  });
+}
+
+function cleanup() {
+  if (nodeDeleted) { Services.obs.removeObserver(cleanup, DESTROYED); }
+  gBrowser.removeCurrentTab();
+  finish();
+}