1 files changed, 26 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 0000000000..996aa320b9
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_isProxy.js
@@ -0,0 +1,26 @@
+function run_test() {
+  var handler = {
+      get: function(target, name){
+          return name in target?
+              target[name] :
+              37;
+      }
+  };
+
+  var p = new Proxy({}, handler);
+  Assert.ok(Cu.isProxy(p));
+  Assert.ok(!Cu.isProxy({}));
+  Assert.ok(!Cu.isProxy(42));
+
+  sb = new Cu.Sandbox(this,
+                      { wantExportHelpers: true });
+
+  Assert.ok(!Cu.isProxy(sb));
+
+  sb.ok = ok;
+  sb.p = p;
+  Cu.evalInSandbox('ok(isProxy(p));' +
+                   'ok(!isProxy({}));' +
+                   'ok(!isProxy(42));',
+                   sb);
+}