1 files changed, 14 insertions, 0 deletions
diff --git a/devtools/platform/tests/xpcshell/head_dbg.js b/devtools/platform/tests/xpcshell/head_dbg.js
new file mode 100644
index 0000000000..48942bdb7a
--- /dev/null
+++ b/devtools/platform/tests/xpcshell/head_dbg.js
@@ -0,0 +1,14 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+function testGlobal(name) {
+  const systemPrincipal = Cc["@mozilla.org/systemprincipal;1"].createInstance(
+    Ci.nsIPrincipal
+  );
+
+  const sandbox = Cu.Sandbox(systemPrincipal);
+  Cu.evalInSandbox("this.__name = '" + name + "'", sandbox);
+  return sandbox;
+}