1 files changed, 56 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestAutoRef.cpp b/xpcom/tests/gtest/TestAutoRef.cpp
new file mode 100644
index 0000000000..49042e8fbd
--- /dev/null
+++ b/xpcom/tests/gtest/TestAutoRef.cpp
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// vim:cindent:ts=4:et:sw=4:
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsAutoRef.h"
+#include "gtest/gtest.h"
+
+struct TestObjectA {
+public:
+  TestObjectA() : mRefCnt(0) {
+  }
+
+  ~TestObjectA() {
+    EXPECT_EQ(mRefCnt, 0);
+  }
+
+public:
+  int mRefCnt;
+};
+
+template <>
+class nsAutoRefTraits<TestObjectA> : public nsPointerRefTraits<TestObjectA>
+{
+public:
+  static int mTotalRefsCnt;
+
+  static void Release(TestObjectA *ptr) {
+    ptr->mRefCnt--;
+    if (ptr->mRefCnt == 0) {
+      delete ptr;
+    }
+  }
+
+  static void AddRef(TestObjectA *ptr) {
+    ptr->mRefCnt++;
+  }
+};
+
+int nsAutoRefTraits<TestObjectA>::mTotalRefsCnt = 0;
+
+TEST(AutoRef, Assignment)
+{
+  {
+    nsCountedRef<TestObjectA> a(new TestObjectA());
+    ASSERT_EQ(a->mRefCnt, 1);
+
+    nsCountedRef<TestObjectA> b;
+    ASSERT_EQ(b.get(), nullptr);
+
+    a.swap(b);
+    ASSERT_EQ(b->mRefCnt, 1);
+    ASSERT_EQ(a.get(), nullptr);
+  }
+}