[build] introduce catch2, update cmake

CMakeLists.txt

@@ -18,6 +18,7 @@ include(cmake/variables.cmake)
 add_library(
     molcore_molcore
     source/molcore.cpp
+    source/space.cpp
 )
 add_library(molcore::molcore ALIAS molcore_molcore)
 

include/molcore/space.hpp

@@ -0,0 +1,39 @@
+
+
+namespace molcore {
+
+    class Region {
+
+        public:
+
+            virtual bool isin(const double x, const double y, const double z) const = 0;
+
+            virtual ~Region() = default;
+
+        private:
+
+
+    };
+
+    class Boundary {
+
+        public:
+
+            virtual ~Boundary() = default;
+
+        private:
+
+    };
+
+    class Box : public Region, public Boundary {
+
+        public:
+
+            Box();
+
+            auto isin(const double x, const double y, const double z) const -> bool override;
+
+        private:    
+
+    };
+}  // namespace molcore

source/space.cpp

@@ -0,0 +1,12 @@
+#include "molcore/space.hpp"
+
+namespace molcore
+{
+
+Box::Box() {}
+
+bool Box::isin(const double x, const double y, const double z) const
+{
+  return true;
+}
+}  // namespace molcore

test/CMakeLists.txt

@@ -6,19 +6,29 @@ include(../cmake/project-is-top-level.cmake)
 include(../cmake/folders.cmake)
 
 # ---- Dependencies ----
-
 if(PROJECT_IS_TOP_LEVEL)
   find_package(molcore REQUIRED)
   enable_testing()
+elseif()
+
 endif()
 
+find_package(Catch2 3 REQUIRED)
 # ---- Tests ----
 
-add_executable(molcore_test source/molcore_test.cpp)
+# TODO: auto find tests starts with "test_"
+file(GLOB_RECURSE TEST_SOURCES CONFIGURE_DEPENDS "source/*.cpp")
+message(STATUS "find test sources: ${TEST_SOURCES}")
+
+add_executable(molcore_test ${TEST_SOURCES})
 target_link_libraries(molcore_test PRIVATE molcore::molcore)
+target_link_libraries(molcore_test PRIVATE Catch2::Catch2WithMain)
 target_compile_features(molcore_test PRIVATE cxx_std_20)
 
-add_test(NAME molcore_test COMMAND molcore_test)
+include(Catch)
+catch_discover_tests(molcore_test)
+
+# add_test(NAME molcore_test COMMAND molcore_test)
 
 # ---- End-of-file commands ----
 

test/source/test_export.cpp

@@ -0,0 +1,12 @@
+#include <string>
+
+#include <catch2/catch_test_macros.hpp>
+
+#include "molcore/molcore.hpp"
+
+TEST_CASE("Exported Class", "[exported]")
+{
+  auto const exported = exported_class {};
+
+  CHECK(std::string("molcore") == exported.name());
+}

test/source/test_space.cpp

@@ -0,0 +1,14 @@
+#include <catch2/catch_test_macros.hpp>
+
+#include "molcore/space.hpp"
+
+namespace molcore
+{
+
+TEST_CASE("Test Space", "[Box]")
+{
+  auto box = Box();
+  CHECK(box.isin(1, 2, 3));
+}
+
+}  // namespace molcore