#!/usr/bin/perl --

use strict;
use warnings;

use Test::More qw' no_plan ';

Main( @ARGV );
exit( 0 );

sub Main {
    my @arg = (
        [ [ '--foo=bar', '--foo', 'bar' ], undef,  {foo => 'bar' } ],
        [ [ '--foo', 'bar' ], undef, {foo => 'bar' } ],
        [ [ '--one=two', '--foo', 'bar' ], undef, {one => 'two', foo => 'bar' } ],
    );
    for my $arg( @arg ){
        my( $in, $spec, $expected ) = @$arg;
        my $got = MapArg($in,$spec);
        is_deeply($got, $expected , "( @$in )" );
    }
}

sub MapArg {
    my( $arg, $spec ) = @_;
    my %res =  map {/^--(.*?)=/ => /=(.*)$/} @$arg;
    return \%res;
}

__END__
#   Failed test '( --foo bar )'
#   at - line 20.
#     Structures begin differing at:
#          $got->{foo} = Does not exist
#     $expected->{foo} = 'bar'
#   Failed test '( --one=two --foo bar )'
#   at - line 20.
#     Structures begin differing at:
#          $got->{foo} = Does not exist
#     $expected->{foo} = 'bar'
# Looks like you failed 2 tests of 3.