1 files changed, 24 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_components.js b/js/xpconnect/tests/unit/test_components.js
new file mode 100644
index 0000000000..e019b78f8f
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_components.js
@@ -0,0 +1,24 @@
+function run_test() {
+  var sb1 = Cu.Sandbox("http://www.blah.com");
+  var sb2 = Cu.Sandbox(this);
+  var rv;
+
+  // non-chrome accessing chrome Components
+  sb1.C = Components;
+  checkThrows("C.interfaces", sb1);
+  checkThrows("C.utils", sb1);
+  checkThrows("C.classes", sb1);
+
+  // non-chrome accessing own Components: shouldn't exist.
+  Assert.equal(Cu.evalInSandbox("typeof Components", sb1), 'undefined');
+
+  // chrome accessing chrome
+  sb2.C = Components;
+  rv = Cu.evalInSandbox("C.utils", sb2);
+  Assert.equal(rv, Cu);
+}
+
+function checkThrows(expression, sb) {
+  var result = Cu.evalInSandbox('(function() { try { ' + expression + '; return "allowed"; } catch (e) { return e.toString(); }})();', sb);
+  Assert.ok(!!/denied/.exec(result));
+}