1 files changed, 49 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/harmony/private-fields-special-object.js b/deps/v8/test/mjsunit/harmony/private-fields-special-object.js
new file mode 100644
index 0000000000..309143d904
--- /dev/null
+++ b/deps/v8/test/mjsunit/harmony/private-fields-special-object.js
@@ -0,0 +1,49 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-private-fields --allow-natives-syntax
+
+async function f(assert) {
+  try {
+    module_namespace_obj = await import('modules-skip-1.js');
+  } catch(e) {
+    %AbortJS(e);
+  }
+
+  class A {
+    constructor(arg) {
+      return arg;
+    }
+  }
+
+  class X extends A {
+    #x = 1;
+
+    constructor(arg) {
+      super(arg);
+    }
+
+    getX(arg) {
+      return arg.#x;
+    }
+
+    setX(arg, val) { arg.#x = val; }
+  }
+
+  let x = new X(module_namespace_obj);
+
+  assert.equals(1, X.prototype.getX(module_namespace_obj));
+  assert.equals(1, X.prototype.getX(module_namespace_obj));
+  assert.equals(1, X.prototype.getX(module_namespace_obj));
+
+  X.prototype.setX(module_namespace_obj, 2);
+  X.prototype.setX(module_namespace_obj, 3);
+  X.prototype.setX(module_namespace_obj, 4);
+}
+
+testAsync(assert => {
+  assert.plan(3);
+
+  f(assert).catch(assert.unreachable);
+}, "private-fields-special-object");