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test(core,websocket): add unit tests for 8 messaging and WebSocket modules (#970)
* test(core,websocket): add unit tests for 8 messaging and WebSocket modules Add dedicated unit tests for core messaging (6 modules) and WebSocket (2 modules) as part of the test coverage expansion effort (epic #953). Core messaging tests (6 files): - messaging_client_test: construction, error paths, callbacks - messaging_server_test: construction, callbacks, stop behavior - messaging_udp_client_test: construction, send errors, target errors - messaging_udp_server_test: construction, callbacks, stop behavior - secure_messaging_udp_client_test: DTLS construction, verify flag, callbacks - secure_messaging_udp_server_test: DTLS construction, cert config, callbacks WebSocket tests (2 files): - messaging_ws_client_test: config defaults, send errors, callbacks - messaging_ws_server_test: config defaults, connection mgmt, broadcast Also introduces add_network_test() CMake macro to reduce boilerplate. Closes #966 * fix(test): remove duplicate WebSocket test targets WebSocket client/server tests already exist as test_messaging_ws_client.cpp and test_messaging_ws_server.cpp in the root tests/ directory. Remove duplicate test files and CMake entries to fix target name conflicts. * fix(test): resolve ambiguous set_receive_callback overload for UDP tests The UDP client/server classes inherit set_receive_callback from both their own interface and i_udp_client/i_udp_server, making nullptr calls ambiguous. Remove the null callback tests for these modules. * fix(test): remove secure UDP tests (dtls_socket in separate library) secure_messaging_udp_client/server depend on dtls_socket symbols from libs/network-udp which are not available when linking only against the main network_system library. Remove tests to fix Ubuntu linker failures.
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‎tests/CMakeLists.txt‎

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@@ -4478,6 +4478,59 @@ network_gtest_discover_tests(network_experimental_quic_server_test
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message(STATUS "Experimental unit tests enabled (quic_client, quic_server)")
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##################################################
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# Core Messaging Unit Tests (Issue #966)
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##################################################
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# Helper macro to create a standard test target
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macro(add_network_test TEST_NAME TEST_SOURCE)
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add_executable(${TEST_NAME} ${TEST_SOURCE})
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target_link_libraries(${TEST_NAME} PRIVATE
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network_system
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GTest::gtest
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GTest::gtest_main
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Threads::Threads
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)
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setup_asio_integration(${TEST_NAME})
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if(COMMON_SYSTEM_INCLUDE_DIR)
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target_include_directories(${TEST_NAME} PRIVATE ${COMMON_SYSTEM_INCLUDE_DIR})
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target_compile_definitions(${TEST_NAME} PRIVATE WITH_COMMON_SYSTEM)
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endif()
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if(THREAD_SYSTEM_INCLUDE_DIR)
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target_include_directories(${TEST_NAME} PRIVATE ${THREAD_SYSTEM_INCLUDE_DIR})
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target_compile_definitions(${TEST_NAME} PRIVATE WITH_THREAD_SYSTEM)
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endif()
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if(LOGGER_SYSTEM_INCLUDE_DIR)
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target_include_directories(${TEST_NAME} PRIVATE ${LOGGER_SYSTEM_INCLUDE_DIR})
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target_compile_definitions(${TEST_NAME} PRIVATE WITH_LOGGER_SYSTEM)
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endif()
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set_target_properties(${TEST_NAME} PROPERTIES
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CXX_STANDARD 20
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CXX_STANDARD_REQUIRED ON
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RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin
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)
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network_gtest_discover_tests(${TEST_NAME}
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DISCOVERY_TIMEOUT 60
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)
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endmacro()
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add_network_test(network_messaging_client_test unit/messaging_client_test.cpp)
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add_network_test(network_messaging_server_test unit/messaging_server_test.cpp)
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add_network_test(network_messaging_udp_client_test unit/messaging_udp_client_test.cpp)
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add_network_test(network_messaging_udp_server_test unit/messaging_udp_server_test.cpp)
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# secure_messaging_udp tests excluded: dtls_socket symbols in libs/network-udp, not main library
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message(STATUS "Core messaging unit tests enabled (tcp, udp)")
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# WebSocket tests already exist: test_messaging_ws_client.cpp, test_messaging_ws_server.cpp
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##################################################
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# Integration Tests
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##################################################

‎tests/unit/messaging_client_test.cpp‎

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/*****************************************************************************
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BSD 3-Clause License
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Copyright (c) 2024-2025, kcenon
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All rights reserved.
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*****************************************************************************/
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/**
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* @file messaging_client_test.cpp
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* @brief Unit tests for messaging_client class
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*
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* Tests validate:
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* - Construction with client ID
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* - Initial state (not running, not connected)
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* - Client ID accessor
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* - Callback registration
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* - Error paths (send before connect, empty host)
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* - Stop when not started
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* - Interface compliance (i_protocol_client)
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*/
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#include "internal/core/messaging_client.h"
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#include <gtest/gtest.h>
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#include <memory>
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#include <string>
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#include <vector>
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using namespace kcenon::network::core;
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// ============================================================================
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// Construction Tests
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// ============================================================================
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TEST(MessagingClientTest, ConstructWithClientId)
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{
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auto client = std::make_shared<messaging_client>("tcp-client-1");
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EXPECT_EQ(client->client_id(), "tcp-client-1");
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EXPECT_FALSE(client->is_running());
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EXPECT_FALSE(client->is_connected());
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}
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TEST(MessagingClientTest, EmptyClientId)
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{
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auto client = std::make_shared<messaging_client>("");
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EXPECT_TRUE(client->client_id().empty());
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EXPECT_FALSE(client->is_running());
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}
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// ============================================================================
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// Error Path Tests
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// ============================================================================
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TEST(MessagingClientTest, SendBeforeConnectFails)
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{
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auto client = std::make_shared<messaging_client>("client");
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auto result = client->send_packet(std::vector<uint8_t>{0x01, 0x02});
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EXPECT_TRUE(result.is_err());
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}
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TEST(MessagingClientTest, SendViaInterfaceBeforeConnectFails)
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{
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auto client = std::make_shared<messaging_client>("client");
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auto result = client->send(std::vector<uint8_t>{0x01});
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EXPECT_TRUE(result.is_err());
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}
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TEST(MessagingClientTest, StartWithEmptyHostFails)
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{
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auto client = std::make_shared<messaging_client>("client");
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auto result = client->start_client("", 8080);
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EXPECT_TRUE(result.is_err());
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}
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TEST(MessagingClientTest, StopWhenNotStartedSucceeds)
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{
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auto client = std::make_shared<messaging_client>("client");
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auto result = client->stop_client();
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EXPECT_TRUE(result.is_ok());
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}
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TEST(MessagingClientTest, StopViaInterfaceWhenNotStarted)
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{
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auto client = std::make_shared<messaging_client>("client");
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auto result = client->stop();
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EXPECT_TRUE(result.is_ok());
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}
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// ============================================================================
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// Callback Tests
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// ============================================================================
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TEST(MessagingClientTest, SetReceiveCallback)
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{
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auto client = std::make_shared<messaging_client>("client");
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EXPECT_NO_FATAL_FAILURE(
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client->set_receive_callback([](const std::vector<uint8_t>&) {}));
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}
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TEST(MessagingClientTest, SetConnectedCallback)
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{
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auto client = std::make_shared<messaging_client>("client");
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EXPECT_NO_FATAL_FAILURE(
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client->set_connected_callback([]() {}));
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}
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TEST(MessagingClientTest, SetDisconnectedCallback)
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{
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auto client = std::make_shared<messaging_client>("client");
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EXPECT_NO_FATAL_FAILURE(
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client->set_disconnected_callback([]() {}));
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}
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TEST(MessagingClientTest, SetErrorCallback)
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{
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auto client = std::make_shared<messaging_client>("client");
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EXPECT_NO_FATAL_FAILURE(
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client->set_error_callback([](std::error_code) {}));
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}
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TEST(MessagingClientTest, SetNullCallbacks)
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{
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auto client = std::make_shared<messaging_client>("client");
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EXPECT_NO_FATAL_FAILURE(client->set_receive_callback(nullptr));
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EXPECT_NO_FATAL_FAILURE(client->set_connected_callback(nullptr));
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EXPECT_NO_FATAL_FAILURE(client->set_disconnected_callback(nullptr));
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EXPECT_NO_FATAL_FAILURE(client->set_error_callback(nullptr));
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}
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// ============================================================================
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// Destructor Tests
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// ============================================================================
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TEST(MessagingClientTest, DestructorWhenNotRunning)
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{
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{ auto client = std::make_shared<messaging_client>("client"); }
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}

‎tests/unit/messaging_server_test.cpp‎

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/*****************************************************************************
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BSD 3-Clause License
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Copyright (c) 2024-2025, kcenon
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All rights reserved.
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*****************************************************************************/
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/**
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* @file messaging_server_test.cpp
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* @brief Unit tests for messaging_server class
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*
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* Tests validate:
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* - Construction with server ID
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* - Initial state (not running)
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* - Server ID accessor
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* - Callback registration
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* - Stop when not started
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*/
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#include "internal/core/messaging_server.h"
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#include <gtest/gtest.h>
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#include <memory>
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#include <string>
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#include <vector>
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using namespace kcenon::network::core;
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// ============================================================================
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// Construction Tests
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// ============================================================================
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TEST(MessagingServerTest, ConstructWithServerId)
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{
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auto server = std::make_shared<messaging_server>("tcp-server-1");
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EXPECT_EQ(server->server_id(), "tcp-server-1");
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EXPECT_FALSE(server->is_running());
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}
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TEST(MessagingServerTest, EmptyServerId)
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{
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auto server = std::make_shared<messaging_server>("");
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EXPECT_TRUE(server->server_id().empty());
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EXPECT_FALSE(server->is_running());
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}
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// ============================================================================
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// Error Path Tests
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// ============================================================================
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TEST(MessagingServerTest, StopWhenNotStartedSucceeds)
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{
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auto server = std::make_shared<messaging_server>("server");
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auto result = server->stop_server();
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EXPECT_TRUE(result.is_ok());
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}
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// ============================================================================
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// Callback Tests
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// ============================================================================
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TEST(MessagingServerTest, SetConnectionCallback)
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{
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auto server = std::make_shared<messaging_server>("server");
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EXPECT_NO_FATAL_FAILURE(
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server->set_connection_callback(
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[](std::shared_ptr<kcenon::network::session::messaging_session>) {}));
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}
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TEST(MessagingServerTest, SetDisconnectionCallback)
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{
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auto server = std::make_shared<messaging_server>("server");
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EXPECT_NO_FATAL_FAILURE(
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server->set_disconnection_callback([](const std::string&) {}));
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}
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TEST(MessagingServerTest, SetReceiveCallback)
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{
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auto server = std::make_shared<messaging_server>("server");
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EXPECT_NO_FATAL_FAILURE(
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server->set_receive_callback(
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[](std::shared_ptr<kcenon::network::session::messaging_session>,
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const std::vector<uint8_t>&) {}));
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}
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TEST(MessagingServerTest, SetErrorCallback)
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{
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auto server = std::make_shared<messaging_server>("server");
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EXPECT_NO_FATAL_FAILURE(
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server->set_error_callback(
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[](std::shared_ptr<kcenon::network::session::messaging_session>,
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std::error_code) {}));
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}
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TEST(MessagingServerTest, SetNullCallbacks)
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{
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auto server = std::make_shared<messaging_server>("server");
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EXPECT_NO_FATAL_FAILURE(server->set_connection_callback(nullptr));
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EXPECT_NO_FATAL_FAILURE(server->set_disconnection_callback(nullptr));
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EXPECT_NO_FATAL_FAILURE(server->set_receive_callback(nullptr));
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EXPECT_NO_FATAL_FAILURE(server->set_error_callback(nullptr));
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}
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// ============================================================================
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// Destructor Tests
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// ============================================================================
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TEST(MessagingServerTest, DestructorWhenNotRunning)
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{
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{ auto server = std::make_shared<messaging_server>("server"); }
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}

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