[monitoring-plugins] Fix some tests

[RincewindsHat]

 Module: monitoring-plugins
 Branch: master
 Commit: 726a29a3ac4b155536099b8cae2bd517d56fb5f8
 Author: RincewindsHat <12514511+RincewindsHat at users.noreply.github.com>
   Date: Tue Oct 26 12:50:14 2021 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=726a29a

Fix some tests

---

 plugins/t/check_disk.t | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/plugins/t/check_disk.t b/plugins/t/check_disk.t
index fdd8769..ec527e7 100644
--- a/plugins/t/check_disk.t
+++ b/plugins/t/check_disk.t
@@ -88,8 +88,9 @@ $result = NPTest->testCmd(
         );
 $_ = $result->perf_output;
 my ($warn_absth_data, $crit_absth_data, $total_absth_data) = (m/=.[^;]*;(\d+);(\d+);\d+;(\d+)/);
-is ($warn_absth_data, $total_absth_data - 20, "Wrong warning in perf data using absolute thresholds");
-is ($crit_absth_data, $total_absth_data - 10, "Wrong critical in perf data using absolute thresholds");
+# default unit is MiB, but perfdata is always bytes
+is ($warn_absth_data, $total_absth_data - (20 * (2 ** 20)), "Wrong warning in perf data using absolute thresholds");
+is ($crit_absth_data, $total_absth_data - (10 * (2 ** 20)), "Wrong critical in perf data using absolute thresholds");
 
 # Then check percent thresholds.
 $result = NPTest->testCmd(
@@ -119,7 +120,7 @@ like  ( $result->only_output, qr/$more_free/, "Have disk name in text");
 $result = NPTest->testCmd( "./check_disk -w 1 -c 1 -p $more_free -p $less_free" );
 cmp_ok( $result->return_code, '==', 0, "At least 1 MB available on $more_free and $less_free");
 $_ = $result->output;
-my ($free_mb_on_mp1, $free_mb_on_mp2) = (m/(\d+) MB .* (\d+) MB /g);
+my ($free_mb_on_mp1, $free_mb_on_mp2) = (m/(\d+)MiB .* (\d+)MiB /g);
 my $free_mb_on_all = $free_mb_on_mp1 + $free_mb_on_mp2;