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#!/usr/bin/perl -w
use strict;
use Test::More tests => 4;
require './t/object/SetSubClass.pm';
my $sd1 = SetSubClass::set( 1,2,3,4 );
my $sd2 = SetSubClass::set(3,4,5,6);
my $union = $sd1->union($sd2);
isa_ok( $union, 'SetSubClass', "union of SetSubClass with SetSubClass" );
my $intersection = $sd1->intersection($sd2);
isa_ok( $union, 'SetSubClass', "intersection of SetSubClass with SetSubClass" );
my $difference = $sd1->difference($sd2);
isa_ok( $difference, 'SetSubClass', "difference of SetSubClass with SetSubClass" );
my $invert = $sd1 / $sd2;
isa_ok( $invert, 'SetSubClass', "invert of SetSubClass with SetSubClass" );
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