use abs path for $0 (fix tests with Pod::Usage)

Makefile.PL

@@ -17,6 +17,7 @@ WriteMakefile(
     },
     BUILD_REQUIRES => {
         'Capture::Tiny'         => 0,
+        'Cwd'                   => 0,
         'Data::Dumper'          => 0,
         'JSON::PP'              => 0, # required by YAML::XS
         'Test::File::Contents'  => 0.23,

lib/App/NDTools/Test.pm

@@ -5,10 +5,17 @@ use warnings FATAL => 'all';
 use parent qw(Exporter);
 
 use Capture::Tiny qw(capture);
+use Cwd qw(abs_path);
 use Data::Dumper;
 use Scalar::Util qw(blessed);
 use Test::More;
 
+BEGIN {
+    # relative path will be incorrect when `cd t_dir` used
+    # required by Pod::Usage
+    $0 = abs_path($0);
+}
+
 our @EXPORT = qw(
     run_ok
     t_ab_cmp

t/lib/NDTools-NDTool.t

@@ -57,8 +57,6 @@ like($err, qr/Usage/, "STDERR should contain usage");
 is($out, '', "STDOUT for usage method must be empty");
 file_contents_eq_or_diff('usage.exp', $err, "Usage text should go to STDERR");
 
-diag ">>>> $0";
-
 ($out, $err) = capture { eval { App::NDTools::NDTool->new('--version') }};
 like($out, qr/\d+\.\d+/, "STDOUT for usage method must be empty");
 is($err, '', "STDERR for version should be empty");