--- t/fs.t	2007/07/08 21:03:26	10
+++ t/fs.t	2007/07/09 13:33:13	15
@@ -4,8 +4,9 @@
 
 my $debug = shift @ARGV;
 
-use Test::More tests => 135;
+use Test::More tests => 710;
 use File::Slurp;
+use IO::File;
 
 my ( $from, $to, $tmp ) = ( '/tmp/comp', '/tmp/no-comp', '/dev/shm/comp' );
 
@@ -13,23 +14,66 @@
 ok( -e $to, 'to' );
 ok( -e $tmp, 'tmp' );
 
+ok( (system "touch $to/.debug") == 0, 'debug on' );
+
+sub dump_debug {
+	my $msg = shift;
+	ok( open(my $d, '<', "$to/.debug"), 'open debug' );
+	local $/;
+	my $dump = <$d>;
+	diag "DEBUG: $msg\n$dump\n" if $debug;
+	ok( close($d), 'close debug' );
+}
+
 sub file {
 	my ( $op, $path, $content ) = @_;
+	my $orig_size = -s "$to/$path";
 	ok( open( my $fh, $op, "$to/$path" ), "open( $op $path )");
-	if ( $op =~ m/>/ ) {
+	if ( $op eq '>' ) {
+		cmp_ok( -s "$to/$path", '==', 0, "truncate $to/$path" );
 		print $fh $content;
-	} else {
+	} elsif ( $op eq '>>' ) {
+		cmp_ok( -s "$to/$path", '==', $orig_size, "no truncate $to/$path" );
+		print $fh $content;
+
+	} elsif ( $op eq '<' ) {
+		my $orig_content = $content;
 		local $/;
 		$content = <$fh>;
-		ok( $content, 'has content' );
+		if ( defined( $content ) ) {
+			cmp_ok( $content, 'eq', $orig_content, "content " . length($content) . " bytes" );
+		} else {
+			ok( $content, "has " . length($content) . " bytes" );
+		}
+	} else {
+		die "unsupported op: $op";
 	}
+	dump_debug 'before close';
 	ok( close($fh), 'close' );
+	dump_debug 'after close';
 
-	ok ( -e "$to/$path", 'exists' );
+	ok ( -e "$to/$path", "exists $to/$path" );
 
-	ok( -e "$from/$path" || -e "$from/${path}.gz", 'on disk' );
+	my $pack = "$from/${path}.gz";
+	my $size = length($content);
 
-	ok( -e "$tmp/$path" , 'in tmp' ) if ( $op =~ m/</ );
+	if ( -e $pack ) {
+		ok( -s $pack, "on disk $pack" ) if ( $size > 0 );
+		# check uncompressed size if read
+		ok( -e "$tmp/$path" , "in tmp $tmp/$path" ) if ( $op eq '<' );
+		# check total size if not append
+		if ( $op ne '>>' ) {
+			cmp_ok( -s $pack, '==', $size, "$tmp/$path = $size bytes" );
+		}
+	} else {
+		ok( -e "$from/$path", "on disk $from/$path" );
+		my $curr_size = -s "$from/$path";
+		diag "$op curr_size: $curr_size size: $size";
+		$size += $curr_size if ( $op eq '>>' );
+		cmp_ok( -s "$from/$path", '==', $size, "$from/$path = $size bytes" );
+	}
+
+	dump_debug('at end');
 
 	return $content;
 }
@@ -43,15 +87,69 @@
 	my $file = "test.$i";
 
 	file( '>', $file, $content );
-	cmp_ok( file( '<', $file ), 'eq', $content, "$file content" );
+	file( '<', $file, $content );
 
 	file( '>>', $file, '+append' );
-	cmp_ok( file( '<', $file ), 'eq', $content . '+append', "$file append" );
+	file( '<', $file, $content . '+append' );
 
 	file( '>', $file, '' );
-	cmp_ok( file( '<', $file ), 'eq', '', "$file empty" );
+	file( '<', $file, '' );
 
 	file( '>', $file, $content );
-	cmp_ok( file( '<', $file ), 'eq', $content, "$file content" );
+	file( '<', $file, $content ); 
 
 }
+
+
+sub multiple_rw {
+
+	diag "multiple read-write";
+	ok( my $fh1 = IO::File->new("> $to/m"), 'open 1' );
+	$fh1->autoflush;
+	ok( print($fh1 "1.1\n"), 'print 1.1' );
+	ok( my $fh2 = IO::File->new(">> $to/m"), 'open 2' );
+	$fh2->autoflush;
+	ok( print($fh2 "2.1\n"), 'print 2.1' );
+	cmp_ok( read_file("$to/m"), 'eq', "1.1\n2.1\n", 'mixed' );
+	ok( print($fh1 "1.2\n"), 'print 1.2' );
+	cmp_ok( read_file("$to/m"), 'eq', "1.1\n1.2\n", 'just 1' );
+	dump_debug 'own twice';
+	ok( print($fh1 "x" x 65535), 'print 1 64k' );
+	ok( close($fh1), 'close 1' );
+	dump_debug 'own once';
+	ok( close($fh2), 'close 2' );
+	dump_debug 'closed';
+
+	my @sizes;
+	my $size = 65536;
+	while ( $size > 1 ) {
+		push @sizes, $size;
+		$size /= 2;
+	}
+
+	foreach my $size ( @sizes ) {
+		ok( my $fh1 = IO::File->new("> $to/m"), 'open 1' );
+		ok( truncate( $fh1, $size ), 'truncate' );
+		dump_debug 'truncate';
+		ok( close($fh1), 'close 1' );
+		cmp_ok( -s "$to/m", '==', $size, "truncated to $size" );
+	}
+
+
+	foreach my $size ( sort @sizes ) {
+		my $orig_size = -s "$to/m";
+		ok( my $fh1 = IO::File->new(">> $to/m"), 'open 1' );
+		ok( print($fh1 "x" x $size), "print $size bytes" );
+		dump_debug 'append';
+		ok( close($fh1), 'close 1' );
+		my $expected_size = $size + $orig_size;
+		cmp_ok( -s "$to/m", '==', $expected_size, "appended upto $expected_size" );
+	}
+
+
+}
+
+multiple_rw;
+multiple_rw;
+
+