Occasionally it is useful to have unittest which take inputs.
While we normally try to have this test be more of a lit test
we occasionally don't have tools that can exercise the code
in the right way to test certain things. LLDB has been using
this style of unit test for a while, particularly with regards
to how it tests core dump and minidump file parsing. Recently
i needed this as well for the case where we want to test that
some of the PDB reading code works correctly. It needs to
exercise the code in a way that is not covered by any dumper
and would be impractical to implement in one of the dumpers,
but requires a valid PDB file. Since this is now needed by
more than one project, it makes sense to have this be a
generally supported thing that unit tests can do, and we just
encourage people to use this sparingly.
Differential Revision: https://reviews.llvm.org/D51561
llvm-svn: 341502
