+/*
+ * Copyright 2004-present Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <folly/lang/ColdClass.h>
+
+#include <folly/portability/GTest.h>
+#include <type_traits>
+
+using folly::ColdClass;
+
+TEST(ColdClass, inheritance) {
+ // The only verifiable property of ColdClass is that it must not disrupt the
+ // default constructor/destructor, default copy/move constructors and default
+ // copy/move assignment operators when a class derives from it.
+ struct TestStruct : ColdClass {};
+ EXPECT_TRUE(std::is_nothrow_default_constructible<TestStruct>::value);
+ EXPECT_TRUE(std::is_trivially_copy_constructible<TestStruct>::value);
+ EXPECT_TRUE(std::is_trivially_move_constructible<TestStruct>::value);
+ EXPECT_TRUE(std::is_trivially_copy_assignable<TestStruct>::value);
+ EXPECT_TRUE(std::is_trivially_move_assignable<TestStruct>::value);
+ EXPECT_TRUE(std::is_trivially_destructible<TestStruct>::value);
+ // Same again, but private inheritance. Should make no difference.
+ class TestClass : ColdClass {};
+ EXPECT_TRUE(std::is_nothrow_default_constructible<TestClass>::value);
+ EXPECT_TRUE(std::is_trivially_copy_constructible<TestClass>::value);
+ EXPECT_TRUE(std::is_trivially_move_constructible<TestClass>::value);
+ EXPECT_TRUE(std::is_trivially_copy_assignable<TestClass>::value);
+ EXPECT_TRUE(std::is_trivially_move_assignable<TestClass>::value);
+ EXPECT_TRUE(std::is_trivially_destructible<TestClass>::value);
+}