Add test export interface

Author: adazem009

CMakeLists.txt

@@ -139,7 +139,11 @@ target_compile_definitions(scratchcpp PRIVATE LIBSCRATCHCPP_VERSION_MINOR=${PROJ
 target_compile_definitions(scratchcpp PRIVATE LIBSCRATCHCPP_VERSION_PATCH=${PROJECT_VERSION_PATCH})
 
 # Unit tests
+target_link_libraries(scratchcpp PRIVATE scratchcpp-test-export)
+
 if (LIBSCRATCHCPP_BUILD_UNIT_TESTS)
+    target_compile_definitions(scratchcpp PRIVATE LIBSCRATCHCPP_TEST)
+
     enable_testing()
     add_subdirectory(test)
 endif()

src/CMakeLists.txt

@@ -11,6 +11,13 @@ target_sources(scratchcpp
     rect_p.h
 )
 
+add_library(scratchcpp-test-export
+  INTERFACE
+    test_export.h
+)
+
+target_include_directories(scratchcpp-test-export INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
+
 add_subdirectory(blocks)
 add_subdirectory(engine)
 add_subdirectory(internal)

src/test_export.h

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#ifdef LIBSCRATCHCPP_TEST
+#if defined(_MSC_VER) || defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
+#define LIBSCRATCHCPP_TEST_EXPORT __declspec(dllexport)
+#else
+#define LIBSCRATCHCPP_TEST_EXPORT __attribute__((visibility("default")))
+#endif
+#else
+#define LIBSCRATCHCPP_TEST_EXPORT
+#endif