How can I mix production code with the Unit Tests?

[israel-vieira]

Thanks for the great library, I am interested in using this library for TDD but how the Unit Tests code will not end up on the production binary after compiled from the main program? I have so far failed to find an elegant way to disable, control the boost-ext/ut test runner from my release build, therefore I am using a separated project for testing. Many thanks.

[malcolmdavey]

We used to have some tests in the same source files, but have moved away to always have unit tests in a separate project.
This also had further problems when shared dependent libraries had tests in them as well.