[boost] More tests running with Boost.Test than registered

Subject: [boost] More tests running with Boost.Test than registered
From: Jon Black (jon_black_at_[hidden])
Date: 2011-09-22 16:07:12

I have a large solution in Visual Studio (100+) projects, of which most 
are dll's. The test code is in the DLL's and the tests are run using the 
provided console_test_runner.

At the moment, each DLL has a single passing test. However, when I run 
the console_test_runner on a single dll, the output indicates that there 
are more tests. For example:

D:\Projects\MyProject\console_test_runner.exe --test MyDll1.dll
Running 5 test cases...

*** No errors detected

So I put a print statement in the test in each DLL and ran it again, and 
here's what happened:

D:\Projects\MyProject\console_test_runner.exe --test MyDll1.dll
Running 5 test cases...
TestMyDll5
TestMyDll4
TestMyDll3
TestMyDll2
TestMyDll1

*** No errors detected

The project for MyDll1 depends on the other projects. That can't be a 
coincidence! I'm confused though, why is the console_test_runner 
executing tests in other DLL's when I've only specified MyDll1 on the 
command line? Each DLL has its own unit_test_init() function declared in 
the pre-compiled header, so I'm really lost on what is happening here. 
Is it possible that the other dll tests are getting registered as well?