The library can be downloaded along with other Boost libraries. In this book, I used version 1.63, but the features discussed in these recipes will probably be available for many future versions. The Test library comes in three variants:
- Single header: This enables you to write test programs without building the library; you just need to include a single header. Its limitation is that you can only have a single translation unit for the module; however, you can still split the module into multiple header files so that you can separate different test suites in different files.
- Static library: This enables you to split a module across different translation units, but the library needs to be built first as a static library.
