1 files changed, 29 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_isProxy.js b/js/xpconnect/tests/unit/test_isProxy.js
new file mode 100644
index 000000000..7cc526226
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_isProxy.js
@@ -0,0 +1,29 @@
+function run_test() {
+  var Cu = Components.utils;
+
+  var handler = {
+      get: function(target, name){
+          return name in target?
+              target[name] :
+              37;
+      }
+  };
+
+  var p = new Proxy({}, handler);
+  do_check_true(Cu.isProxy(p));
+  do_check_false(Cu.isProxy({}));
+  do_check_false(Cu.isProxy(42));
+
+  sb = new Cu.Sandbox(this,
+                      { wantExportHelpers: true });
+
+  do_check_false(Cu.isProxy(sb));
+
+  sb.do_check_true = do_check_true;
+  sb.do_check_false = do_check_false;
+  sb.p = p;
+  Cu.evalInSandbox('do_check_true(isProxy(p));' +
+                   'do_check_false(isProxy({}));' +
+                   'do_check_false(isProxy(42));',
+                   sb);
+}