test: add dummy tests

CMakeLists.txt

@@ -10,6 +10,12 @@ list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")
 include(ExportCompileCommands)
 include(sccache)
 
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+  include(CTest)
+endif()
+
+include(FetchContent)
+
 configure_file("${PROJECT_SOURCE_DIR}/include/version.h.in"
                "${PROJECT_BINARY_DIR}/include/version.h")
 
@@ -20,3 +26,7 @@ target_compile_features(hello PUBLIC cxx_std_20)
 
 target_include_directories(hello PRIVATE "${PROJECT_BINARY_DIR}/include"
                                          "${PROJECT_SOURCE_DIR}/include")
+
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+  add_subdirectory(tests)
+endif()

tests/CMakeLists.txt

@@ -0,0 +1,14 @@
+FetchContent_Declare(
+  catch2
+  GIT_REPOSITORY https://github.com/catchorg/Catch2.git
+  GIT_TAG v3.4.0)
+FetchContent_MakeAvailable(catch2)
+
+add_executable(dummy_tests dummy.cpp)
+
+target_compile_features(dummy_tests PRIVATE cxx_std_20)
+
+target_link_libraries(dummy_tests PRIVATE Catch2::Catch2WithMain)
+
+include(Catch)
+catch_discover_tests(dummy_tests)

tests/dummy.cpp

@@ -0,0 +1,4 @@
+#include <catch2/catch_test_macros.hpp>
+
+TEST_CASE("dummy", "dummy tests") { REQUIRE(1 + 1 == 2); }
+TEST_CASE("dummy fails", "dummy tests") { REQUIRE_FALSE(1 + 1 != 2); }