boost test headers

Use cmake FetchContent to manage boost-test dependency

Why Use BoostTestHeaders?

• No need to configure vcpkg or download the full Boost library.
• Simplifies CMake dependency management for C++ unit testing.
• Provides a header-only approach for Boost.Test in your project.

Usage Summary

The easiest way to use this repository is to copy FindBoostTestHeaders.cmake into your project, add it to your CMake module path, call find_package(BoostTestHeaders), and link with boost-test-headers when building your tests.

Step-by-Step Usage

1. Copy Module File:
   Download or copy the FindBoostTestHeaders.cmake file from this repository into your project's CMake modules directory (e.g., cmake).

2. Set CMake Module Path:
   In your project's main CMakeLists.txt, ensure your module path is set to include the directory containing FindBoostTestHeaders.cmake:

   list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")

3. Find Package:
   Add the following line to your test build logic to locate Boost.Test headers:

   find_package(BoostTestHeaders REQUIRED)

4. Link Your Test Target:
   When declaring your test executable, link it with the boost_test_headers target to make the Boost.Test headers available:

   add_executable(my_test main.cpp)
   target_link_libraries(my_test PRIVATE boost_test_headers)