# -*-Perl-*- Test Harness script for Bioperl
# $Id$

use strict;

BEGIN {     
    use lib '.';
    use Bio::Root::Test;
    
    test_begin(-tests => 45);
	
	use_ok('Bio::SeqIO');
}

my $verbose = test_debug();

my @formats = qw(gcg fasta raw pir tab ace );
# The following files or formats are failing: swiss genbank interpro embl

foreach my $format (@formats) {
	print "======== $format ========\n" if $verbose;
	read_write($format);
}

sub read_write {
	my $format = shift;
	my $seq;
	my $str = Bio::SeqIO->new(-file=> test_input_file("test.$format"),
							  -format => $format);
	ok $seq = $str->next_seq();
	print "Sequence 1 of 2 from $format stream:\n", $seq->seq, "\n\n" if  $verbose;
	unless ($format eq 'raw') {
		is $seq->id, 'roa1_drome',"ID for format $format";
		is $seq->length, 358;
	}
	
	unless ($format eq 'gcg') { # GCG file can contain only one sequence
		ok $seq = $str->next_seq();
		print "Sequence 2 of 2 from $format stream:\n", $seq->seq, $seq->seq, "\n" if $verbose;
	}
	
	my $outfile = test_output_file();
	my $out = Bio::SeqIO->new(-file => ">$outfile",
							  -format => $format);
	ok $out->write_seq($seq);
	if ($format eq 'fasta') {
		my $id_type;
		ok($id_type = $out->preferred_id_type('accession.version'),
			'accession.version');
	}
	
	ok -s $outfile;
}

# from testformats.pl
SKIP: {
    test_skip(-tests => 6, -requires_modules => [qw(Algorithm::Diff
                                                    IO::ScalarArray
                                                    IO::String)]);
    use_ok('Algorithm::Diff');
    eval "use Algorithm::Diff qw(diff LCS);";
    use_ok('IO::ScalarArray');
    use_ok('IO::String');
    
    my %files = ( 
             #'test.embl'      => 'embl',
             #'test.ace'       => 'ace',
              'test.fasta'     => 'fasta',
             #'test.game'      => 'game',
              'test.gcg'       => 'gcg',
             #'test.genbank'   => 'genbank',
              'test.raw'       => 'raw',
             #'test_badlf.gcg' => 'gcg'
              );
    
    while( my ($file, $type) = each %files ) {
        my $filename = test_input_file($file);
        print "processing file $filename\n" if $verbose;
        open(FILE, "< $filename") or die("cannot open $filename");
        my @datain = <FILE>;
        my $in = new IO::String(join('', @datain));
        my $seqin = new Bio::SeqIO( -fh => $in,
                    -format => $type);
        my $out = new IO::String;
        my $seqout = new Bio::SeqIO( -fh => $out,
                     -format => $type);
        my $seq;
        while( defined($seq = $seqin->next_seq) ) {	
        $seqout->write_seq($seq);
        }
        $seqout->close();
        $seqin->close();
        my $strref = $out->string_ref;
        my @dataout = map { $_."\n"} split(/\n/, $$strref );
        my @diffs = &diff( \@datain, \@dataout);
        is @diffs, 0;
        
        if(@diffs && $verbose) {
            foreach my $d ( @diffs ) {
                foreach my $diff ( @$d ) {
                    chomp($diff->[2]);
                    print $diff->[0], $diff->[1], "\n>", $diff->[2], "\n";
                }
            }
            print "in is \n", join('', @datain), "\n";
            print "out is \n", join('',@dataout), "\n";	
        }
    }
}

# simple tests specific to Bio::SeqIO interface (applicable to all SeqIO
# modules)

############ EXCEPTION HANDLING ############

TODO: {
    local $TODO = 'file/fh-based tests should be in Bio::Root::IO, see issue #3204';
    throws_ok {
        Bio::SeqIO->new();
    } qr/No file, fh, or string argument provided/, 'Must pass a file or file handle';
}

throws_ok {
    Bio::SeqIO->new(-fh => undef);
} qr/fh argument provided, but with an undefined value/,
    'Must pass a file or file handle';

throws_ok {
    Bio::SeqIO->new(-file => undef);
} qr/file argument provided, but with an undefined value/,
    'Must pass a file or file handle';

throws_ok {
    Bio::SeqIO->new(-file => 'foo.bar');
} qr/Can not open 'foo.bar' for reading: No such file or directory/,
    'Must pass a real file';