new diagnostic

t/00_diag.pl

@@ -1,11 +1,13 @@
 use strict;
 use warnings;
-use Test::More tests => 1;
+use Test::More;
 use Mojo::IOLoop;
 
+our $format;
+
 my $loop = eval { Mojo::IOLoop->singleton };
 diag $@ if $@;
-ok $loop;
+diag sprintf $format, 'mojo io loop', ref eval { $loop->reactor };
-diag ref eval { $loop->reactor };
 diag $@ if $@;
 
+1;

t/00_diag.t

@@ -0,0 +1,51 @@
+use strict;
+use warnings;
+use Test::More tests => 1;
+BEGIN { eval q{ use EV } }
+eval q{ 
+  use FindBin ();
+  use File::Spec;
+  1;
+} || die $@;
+
+pass 'okay';
+
+my @modules;
+do {
+  my $fh;
+  open($fh, '<', File::Spec->catfile($FindBin::Bin, '00_diag.txt'));
+  @modules = <$fh>;
+  close $fh;
+  chomp @modules;
+};
+
+my $max = 1;
+$max = $_ > $max ? $_ : $max for map { length $_ } @modules;
+our $format = "%-${max}s %s"; 
+
+diag '';
+diag '';
+diag '';
+
+diag sprintf $format, 'perl ', $^V;
+
+require(File::Spec->catfile($FindBin::Bin, '00_diag.pl'))
+  if -e File::Spec->catfile($FindBin::Bin, '00_diag.pl');
+
+foreach my $module (@modules)
+{
+  if(eval qq{ use $module; 1 })
+  {
+    my $ver = eval qq{ \$$module\::VERSION };
+    $ver = 'undef' unless defined $ver;
+    diag sprintf $format, $module, $ver;
+  }
+  else
+  {
+    diag sprintf $format, $module, '-';
+  }
+}
+
+diag '';
+diag '';
+diag '';

t/00_diag.txt

@@ -0,0 +1,24 @@
+Carp
+Cwd
+EV
+ExtUtils::MakeMaker
+File::Spec
+File::Temp
+FindBin
+IO::Handle
+IPC::Open3
+Mojo::Base
+Mojo::ByteStream
+Mojo::IOLoop
+Mojolicious
+Mojolicious::Lite
+Mojolicious::Plugin
+POSIX
+Scalar::Util
+Template
+Template::Provider
+Test::CPAN::Meta
+Test::Mojo
+Test::More
+lib
+utf8