Document how to set up test directory with subfolders

[wmheigl]

Hi, I like to have my test directory reflect the structure of src/. Directory src/ has several subdirectories, one of them two levels deep. I figure that each subdirectory has test_srcfile.c files that define a test suite for that srcfile. I am struggling with propagating up the test suites to the top level. Thank you.

[wmheigl]

Five minutes after hitting 'Comment' the solution came to me. Sorry to bother. If anyone is interested please let me know.