feature(testing-automation): unit tests with Google Framework (#3273)

src/cmake/googletest-download.cmake

@@ -0,0 +1,20 @@
+# code copied from https://crascit.com/2015/07/25/cmake-gtest/
+cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
+
+project(googletest-download NONE)
+
+include(ExternalProject)
+
+ExternalProject_Add(
+        googletest
+        SOURCE_DIR "@GOOGLETEST_DOWNLOAD_ROOT@/googletest-src"
+        BINARY_DIR "@GOOGLETEST_DOWNLOAD_ROOT@/googletest-build"
+        GIT_REPOSITORY
+        https://github.com/google/googletest.git
+        GIT_TAG
+        release-1.10.0
+        CONFIGURE_COMMAND ""
+        BUILD_COMMAND ""
+        INSTALL_COMMAND ""
+        TEST_COMMAND ""
+)

src/cmake/googletest.cmake

@@ -0,0 +1,32 @@
+# the following code to fetch googletest
+# is inspired by and adapted after https://crascit.com/2015/07/25/cmake-gtest/
+# download and unpack googletest at configure time
+
+macro(fetch_googletest _download_module_path _download_root)
+    set(GOOGLETEST_DOWNLOAD_ROOT ${_download_root})
+    configure_file(
+            ${_download_module_path}/googletest-download.cmake
+            ${_download_root}/CMakeLists.txt
+            @ONLY
+    )
+    unset(GOOGLETEST_DOWNLOAD_ROOT)
+
+    execute_process(
+            COMMAND
+            "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
+            WORKING_DIRECTORY
+            ${_download_root}
+    )
+    execute_process(
+            COMMAND
+            "${CMAKE_COMMAND}" --build .
+            WORKING_DIRECTORY
+            ${_download_root}
+    )
+
+    # adds the targers: gtest, gtest_main, gmock, gmock_main
+    add_subdirectory(
+            ${_download_root}/googletest-src
+            ${_download_root}/googletest-build
+    )
+endmacro()

src/cmake/showoptions.cmake

@@ -40,6 +40,12 @@ else()
   message("* Build map/vmap tools            : No  (default)")
 endif()
 
+if( UNIT_TESTS )
+  message("* Build unit tests                : Yes")
+else()
+  message("* Build unit tests                : No  (default)")
+endif()
+
 if( USE_COREPCH )
   message("* Build core w/PCH                : Yes (default)")
 else()

src/test/CMakeLists.txt

@@ -0,0 +1,23 @@
+CollectSourceFiles(
+        ${CMAKE_CURRENT_SOURCE_DIR}
+        PRIVATE_SOURCES
+)
+
+add_executable(
+        unit_tests
+        ${PRIVATE_SOURCES}
+)
+
+target_link_libraries(
+        unit_tests
+        gtest_main
+        game
+        game-interface
+)
+
+add_test(
+        NAME
+        unit
+        COMMAND
+        ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/unit_tests
+)

src/test/server/game/Miscellaneous/FormulasTest.cpp

@@ -0,0 +1,13 @@
+#include "gtest/gtest.h"
+#include "Formulas.h"
+
+TEST(FormulasTest, hk_honor_at_level)
+{
+    EXPECT_EQ(acore::Honor::hk_honor_at_level(80), 124);
+    EXPECT_EQ(acore::Honor::hk_honor_at_level(80, 2), 248);
+    EXPECT_EQ(acore::Honor::hk_honor_at_level(80, 0.5), 62);
+    EXPECT_EQ(acore::Honor::hk_honor_at_level(1), 2);
+    EXPECT_EQ(acore::Honor::hk_honor_at_level(1, 10), 16);
+    EXPECT_EQ(acore::Honor::hk_honor_at_level(2), 4);
+    EXPECT_EQ(acore::Honor::hk_honor_at_level(3), 5);
+}