refactor structure and add basic test

.gitignore

@@ -1 +1,2 @@
 build/
+.cache/

CMakeLists.txt

@@ -7,6 +7,15 @@ set(CMAKE_CXX_STANDARD 20)
 find_package(cxxopts CONFIG REQUIRED)
 find_package(Catch2 CONFIG REQUIRED)
 
-add_executable(gwatch main.cpp)
+add_executable(gwatch src/main.cpp)
-
 target_link_libraries(gwatch PRIVATE cxxopts::cxxopts)
+
+enable_testing()
+
+add_executable(gwatch_tests tests/test_main.cpp)
+
+target_link_libraries(gwatch_tests PRIVATE Catch2::Catch2WithMain)
+
+include(CTest)
+include(Catch)
+catch_discover_tests(gwatch_tests)

tests/test_main.cpp

@@ -0,0 +1,11 @@
+#include <catch2/catch_test_macros.hpp>
+
+TEST_CASE("Basic test", "[example]") {
+    REQUIRE(1 + 1 == 2);
+}
+
+TEST_CASE("String operations", "[string]") {
+    std::string str = "hello";
+    REQUIRE(str.length() == 5);
+    REQUIRE(str == "hello");
+}