[LTP] [PATCH v2 2/2] lib: Add test library design document

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> Hi!
> > +## High-level picture
> > +
> > +    library process
> > +    +----------------------------+
> > +    | main                       |
> > +    |  tst_run_tcases            |
> > +    |   do_setup                 |
> > +    |   for_each_variant         |
> > +    |    for_each_filesystem     |   test process
> > +    |     fork_testrun
> > ------------->+--------------------------------------------+
> > +    |      waitpid               |   | testrun
> > |
> > +    |                            |   |  do_test_setup
> > |
> > +    |                            |   |   tst_test->setup
> > |
> > +    |                            |   |  run_tests
> > |
> > +    |                            |   |   tst_test->test(i) or
> > tst_test->test_all  |
> > +    |                            |   |  do_test_cleanup
> > |
> > +    |                            |   |   tst_test->cleanup
> > |
> > +    |                            |   |  exit(0)
> > |
> > +    |   do_exit                  |
> > +--------------------------------------------+
> > +    |    do_cleanup              |
> > +    |     exit(ret)              |
> > +    +----------------------------+
> 
> Shouldn't we wrap this to ``` so that it renders nicely on the web?

I thought the 4 spaces prefix will already do that. I was testing
it online on dillinger.io and stackedit.io. But I'm fine with adding ```,
if that's better for github.