Use set_up_inc for several unit tests

Use set_up_inc when require.pl is loaded
move plan outside of BEGIN block
when no tests are run at BEGIN time.

Using set_up_inc allow to run these tests under minitest
but also compile them using B::C.

This also has the advantage to use a single
control point for @INC setup.

Note: some tests cannot use 'require test.pl',
unshfit is then used for them.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/io/open.t b/t/io/open.t
index cffef14418..6be9f0e842 100644
--- a/t/io/open.t
+++ b/t/io/open.t
@@ -2,8 +2,8 @@
 
 BEGIN {
     chdir 't' if -d 't';
-    @INC = '../lib';
     require './test.pl';
+    set_up_inc('../lib');
 }
 
 $|  = 1;