iox-eclipse-iceoryx#1640 Polymorphic handler test

Signed-off-by: Matthias Killat <[email protected]>

iceoryx_hoofs/include/iceoryx_hoofs/design_pattern/polymorphic_handler.hpp

@@ -5,7 +5,8 @@
 #include <mutex>
 #include <type_traits>
 
-namespace eh
+// TODO: change namespace? but DesignPattern is a bad namespace name ...
+namespace iox
 {
 // we lose generality now wrt. the interface (require activate, deactivate etc. in the interface)
 template <typename Interface, typename Default>

iceoryx_hoofs/test/moduletests/test_polymorphic_handler.cpp

@@ -0,0 +1,96 @@
+// Copyright (c) 2022 by Apex.AI Inc. All rights reserved.
+//
+// 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.
+//
+// SPDX-License-Identifier: Apache-2.0
+
+#include "iceoryx_hoofs/design_pattern/polymorphic_handler.hpp"
+
+#include "test.hpp"
+#include <iostream>
+
+namespace
+{
+using namespace ::testing;
+
+// intentionally not defined in Foo (cannot be used in tests there)
+constexpr uint32_t DEFAULT_VALUE{66};
+
+struct Foo
+{
+    Foo()
+    {
+        ++numDefaultCtorCalls;
+    }
+
+    explicit Foo(uint32_t v)
+        : value(v)
+    {
+        ++numCtorCalls;
+    }
+
+    Foo(const Foo&) = delete;
+    Foo(Foo&&) = delete;
+    Foo& operator=(const Foo&) = delete;
+    Foo& operator=(Foo&&) = delete;
+
+    ~Foo()
+    {
+        ++numDtorCalls;
+    }
+
+    uint32_t value{DEFAULT_VALUE};
+
+    static uint32_t numDefaultCtorCalls;
+    static uint32_t numCtorCalls;
+    static uint32_t numDtorCalls;
+
+    static void reset()
+    {
+        numDefaultCtorCalls = 0;
+        numCtorCalls = 0;
+        numDtorCalls = 0;
+    }
+};
+
+uint32_t Foo::numDefaultCtorCalls;
+uint32_t Foo::numCtorCalls;
+uint32_t Foo::numDtorCalls;
+
+using TestHandler = iox::PolymorphicHandler<Foo, Foo>;
+
+class PolymorphicHandler_test : public Test
+{
+  public:
+    void SetUp() override
+    {
+        internal::CaptureStderr();
+        Foo::reset();
+    }
+
+    void TearDown() override
+    {
+        std::string output = internal::GetCapturedStderr();
+        if (Test::HasFailure())
+        {
+            std::cout << output << std::endl;
+        }
+    }
+};
+
+TEST_F(PolymorphicHandler, create)
+{
+    ::testing::Test::RecordProperty("TEST_ID", "123");
+}
+
+} // namespace