=pod

The tester must supply their own PayPal sandbox seller authentication
(either using certificates or 3-token auth), as well as the buyer
sandbox account (email address).

Should we set env variables, prompt for them, or have them in a conf
file? Prompt for them, but we should allow for an input file as an env
variable:

  WPP_TEST=auth.txt make test

=cut

sub do_args {
    unless( $ENV{WPP_TEST} && -f $ENV{WPP_TEST} ) {
        die "See the TESTING section in `perldoc Business::PayPal::API documentation`\n";
        exit;
    }

    my %args = ();
    open FILE, "<", $ENV{WPP_TEST}
      or die "Could not open $ENV{WPP_TEST}: $!\n";

    my @variables = qw( Username Password Signature Subject timeout
	                CertFile KeyFile PKCS12File PKCS12Password
		        BuyerEmail
		      );

    my %patterns = ();
    @patterns{map { qr/^$_\b/i } @variables} = @variables;

    while( <FILE> ) {
        chomp;

     MATCH: for my $pat (keys %patterns) {
        next unless $_ =~ $pat;
        (my $value = $_) =~ s/$pat\s*=\s*(.+)/$1/;
        $args{ $patterns{$pat} } = $value;
        delete $patterns{$pat};
        last MATCH;
      }
    }

    close FILE;

    ## leave this!
    $args{sandbox} = 1;

    return %args;
}

1;