Add some catch2 tests

CMakeLists.txt

@@ -10,7 +10,7 @@ if(CMAKE_MINOR_VERSION LESS 12)
   project(miniz)
   # see issue https://gitlab.kitware.com/cmake/cmake/merge_requests/1799
 else()
-  project(miniz C)
+  project(miniz)
   set(CMAKE_C_STANDARD 90)
   set(CMAKE_VERBOSE_MAKEFILE ON)
   # set(CMAKE_C_VISIBILITY_PRESET hidden)
@@ -42,6 +42,7 @@ option(BUILD_FUZZERS "Build fuzz targets" OFF)
 option(AMALGAMATE_SOURCES "Amalgamate sources into miniz.h/c" OFF)
 option(BUILD_HEADER_ONLY "Build a header-only version" OFF)
 option(BUILD_SHARED_LIBS "Build shared library instead of static" OFF)
+option(BUILD_TESTS "Build tests" ${MINIZ_STANDALONE_PROJECT})
 option(INSTALL_PROJECT "Install project" ${MINIZ_STANDALONE_PROJECT})
 
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/bin)
@@ -296,6 +297,20 @@ if(BUILD_FUZZERS)
   target_link_libraries(zip_fuzzer miniz)
 endif()
 
+if(BUILD_TESTS)
+	set(CMAKE_CXX_STANDARD 20)
+	set(CMAKE_CXX_STANDARD_REQUIRED YES)
+
+	add_executable(catch_tests tests/main.cpp
+						tests/catch_amalgamated.cpp)
+	target_link_libraries(catch_tests miniz)
+
+	enable_testing()
+
+	add_test(NAME catch_tests
+			 COMMAND $<TARGET_FILE:catch_tests>)
+endif()
+
 set(INCLUDE_INSTALL_DIR "include")
 
 if(INSTALL_PROJECT)

CMakePresets.json

@@ -0,0 +1,17 @@
+{
+  "version": 1,
+  "cmakeMinimumRequired": {
+    "major": 3,
+    "minor": 5,
+    "patch": 0
+  },
+  "configurePresets": [
+    {
+      "name": "gcc",
+      "displayName": "GCC",
+      "description": "Default build options for GCC",
+      "generator": "Ninja",
+      "binaryDir": "${sourceDir}/build"
+    }
+  ]
+}