[eclipse-iceoryx#264] Basic test setup created

iceoryx2-ffi/cxx/include/iox2/config.hpp

@@ -13,6 +13,7 @@
 #ifndef IOX2_CONFIG_HPP
 #define IOX2_CONFIG_HPP
 
+#include "iox/expected.hpp"
 #include "iox/file_name.hpp"
 #include "iox2/internal/iceoryx2.hpp"
 
@@ -23,7 +24,7 @@ namespace config {
 class Global {
   public:
     auto prefix() && -> const char*;
-    auto set_prefix(const char* value) &&;
+    void set_prefix(const iox::FileName& value) &&;
 
   private:
     friend class ::iox2::Config;

iceoryx2-ffi/cxx/src/config.cpp

@@ -91,9 +91,9 @@ auto Global::prefix() && -> const char* {
     return iox2_config_global_prefix(ref_handle);
 }
 
-auto Global::set_prefix(const char* value) && {
+void Global::set_prefix(const iox::FileName& value) && {
     auto* ref_handle = iox2_cast_config_ref_h(m_config->m_handle);
-    iox2_config_global_set_prefix(ref_handle, value);
+    iox2_config_global_set_prefix(ref_handle, value.as_string().c_str());
 }
 } // namespace config
 } // namespace iox2

iceoryx2-ffi/cxx/tests/src/config_tests.cpp

@@ -0,0 +1,27 @@
+// Copyright (c) 2024 Contributors to the Eclipse Foundation
+//
+// See the NOTICE file(s) distributed with this work for additional
+// information regarding copyright ownership.
+//
+// This program and the accompanying materials are made available under the
+// terms of the Apache Software License 2.0 which is available at
+// https://www.apache.org/licenses/LICENSE-2.0, or the MIT license
+// which is available at https://opensource.org/licenses/MIT.
+//
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+#include "iox2/config.hpp"
+
+#include "test.hpp"
+
+namespace {
+using namespace iox2;
+
+TEST(Config, global_prefix_works) {
+    const auto test_value = iox::FileName::create("oh_my_dot").expect("");
+    auto config = Config();
+
+    config.global().set_prefix(test_value);
+    ASSERT_THAT(config.global().prefix(), StrEq(test_value.as_string().c_str()));
+}
+} // namespace