kernel32/tests: add test for RemoveDirectory

[Dmitry Timoshkov]

Zhenbo Li <litimetal at gmail.com> wrote:

> +    /* remove a nonexist directory */
> +    rc = RemoveDirectoryA(directory);
> +    todo_wine
> +    ok(!rc && GetLastError() == ERROR_FILE_NOT_FOUND, 
> +        "Expected ERROR_FILE_NOT_FOUND, got ret=%d, gle=%d\n", rc, GetLastError() );

This kind of test for several values simultaneously is really very awkward
as a starting point for any person who is going to work on this, or just is
looking for a simple bug to fix and greps for todo_wine in the tests. First
of all it's not clear where the failure is: is it the API failing to return
correct return value, or is it just last error which is set differently?
I admit that the error message mentions both values, but it's often more
useful to spot areas with todo_wine statements and clearly see the reason
of a failure without actually running the test.

-- 
Dmitry.