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diff --git a/t/01basic.t b/t/01basic.t
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+#!perl
+
+use Test::More tests => 30;
+
+BEGIN { use_ok 'Sub::Identify', ':all' }
+
+diag "running pure-Perl version of Sub::Identify" if $Sub::Identify::IsPurePerl;
+
+sub buffy { }
+sub vamp::spike { }
+*slayer = *buffy;
+*human::william = \&vamp::spike;
+
+is( sub_name( \&sub_name ), 'sub_name' );
+is( sub_name( \&buffy ), 'buffy' );
+is( sub_name( \&vamp::spike ), 'spike' );
+is( sub_name( \&slayer ), 'buffy' );
+is( sub_name( \&human::william ), 'spike' );
+
+is( stash_name( \&stash_name ), 'Sub::Identify' );
+is( stash_name( \&buffy ), 'main' );
+is( stash_name( \&vamp::spike ), 'vamp' );
+is( stash_name( \&slayer ), 'main' );
+is( stash_name( \&human::william ), 'vamp' );
+
+is( sub_fullname( \&sub_fullname ), 'Sub::Identify::sub_fullname' );
+is( sub_fullname( \&buffy ), 'main::buffy' );
+is( sub_fullname( \&vamp::spike ), 'vamp::spike' );
+is( sub_fullname( \&slayer ), 'main::buffy' );
+is( sub_fullname( \&human::william ), 'vamp::spike' );
+
+is( join('*', get_code_info( \&sub_fullname )), 'Sub::Identify*sub_fullname' );
+is( join('*', get_code_info( \&buffy )), 'main*buffy' );
+is( join('*', get_code_info( \&vamp::spike )), 'vamp*spike' );
+is( join('*', get_code_info( \&slayer )), 'main*buffy' );
+is( join('*', get_code_info( \&human::william )), 'vamp*spike' );
+
+sub xander;
+sub vamp::drusilla;
+is( sub_name( \&xander ), 'xander', 'undefined subroutine' );
+is( sub_fullname( \&xander ), 'main::xander', 'undefined subroutine' );
+is( join('*', get_code_info( \&xander )), 'main*xander', 'undefined subroutine' );
+is( sub_name( \&vamp::drusilla ), 'drusilla', 'undefined subroutine' );
+is( sub_fullname( \&vamp::drusilla ), 'vamp::drusilla', 'undefined subroutine' );
+
+is( sub_name( sub {} ), '__ANON__' );
+my $anon = sub {};
+is( stash_name( $anon ), 'main' );
+is( sub_fullname( $anon ), 'main::__ANON__' );
+is( join('*', get_code_info( sub { 'ah non' } )), 'main*__ANON__' );