source: trunk/essentials/dev-lang/perl/lib/ExtUtils/t/Mkbootstrap.t

#!/usr/bin/perl -w

BEGIN {
    if( $ENV{PERL_CORE} ) {
        chdir 't';
        @INC = ('../lib', 'lib/');
    }
    else {
        unshift @INC, 't/lib/';
    }
}
chdir 't';

use vars qw( $required );
use Test::More tests => 18;

BEGIN { use_ok( 'ExtUtils::Mkbootstrap' ) }

# Mkbootstrap makes a backup copy of "$_[0].bs" if it exists and is non-zero
my $file_is_ready;
local *OUT;
if (open(OUT, '>mkboot.bs')) {
        $file_is_ready = 1;
        print OUT 'meaningless text';
        close OUT;
}

SKIP: {
        skip("could not make dummy .bs file: $!", 2) unless $file_is_ready;

        Mkbootstrap('mkboot');
        ok( -s 'mkboot.bso', 'Mkbootstrap should backup the .bs file' );
        local *IN;
        if (open(IN, 'mkboot.bso')) {
                chomp ($file_is_ready = <IN>);
                close IN;
        }

        is( $file_is_ready, 'meaningless text', 'backup should be a perfect copy' );
}


# if it doesn't exist or is zero bytes in size, it won't be backed up
Mkbootstrap('fakeboot');
ok( !( -f 'fakeboot.bso' ), 'Mkbootstrap should not backup an empty file' );

use TieOut;
my $out = tie *STDOUT, 'TieOut';

# with $Verbose set, it should print status messages about libraries
$ExtUtils::Mkbootstrap::Verbose = 1;
Mkbootstrap('');
is( $out->read, "\tbsloadlibs=\n", 'should report libraries in Verbose mode' );

Mkbootstrap('', 'foo');
like( $out->read, qr/bsloadlibs=foo/, 'should still report libraries' );


# if ${_[0]}_BS exists, require it
$file_is_ready = open(OUT, '>boot_BS');

SKIP: {
        skip("cannot open boot_BS for writing: $!", 1) unless $file_is_ready;

        print OUT '$main::required = 1';
        close OUT;
        Mkbootstrap('boot');

        ok( $required, 'baseext_BS file should be require()d' );
}


# if there are any arguments, open a file named baseext.bs
$file_is_ready = open(OUT, '>dasboot.bs');

SKIP: {
        skip("cannot make dasboot.bs: $!", 5) unless $file_is_ready;

        # if it can't be opened for writing, we want to prove that it'll die
        close OUT;
        chmod 0444, 'dasboot.bs';

        SKIP: {
            skip("cannot write readonly files", 1) if -w 'dasboot.bs'; 

            eval{ Mkbootstrap('dasboot', 1) };
            like( $@, qr/Unable to open dasboot\.bs/, 'should die given bad filename' );
        }

        # now put it back like it was
        chmod 0777, 'dasboot.bs';
        eval{ Mkbootstrap('dasboot', 'myarg') };
        is( $@, '', 'should not die, given good filename' );

        # red and reed (a visual pun makes tests worth reading)
        my $read = $out->read();
        like( $read, qr/Writing dasboot.bs/, 'should print status' );
        like( $read, qr/containing: my/, 'should print verbose status on request' );

        # now be tricky, and set the status for the next skip block
        $file_is_ready = open(IN, 'dasboot.bs');
        ok( $file_is_ready, 'should have written a new .bs file' );
}


SKIP: {
        skip("cannot read .bs file: $!", 2) unless $file_is_ready;

        my $file = do { local $/ = <IN> };

        # filename should be in header
        like( $file, qr/# dasboot DynaLoader/, 'file should have boilerplate' );

        # should print arguments within this array
        like( $file, qr/qw\(myarg\);/, 'should have written array to file' );
}


# overwrite this file (may whack portability, but the name's too good to waste)
$file_is_ready = open(OUT, '>dasboot.bs');

SKIP: {
        skip("cannot make dasboot.bs again: $!", 1) unless $file_is_ready;
        close OUT;

        # if $DynaLoader::bscode is set, write its contents to the file
    local $DynaLoader::bscode;
        $DynaLoader::bscode = 'Wall';
        $ExtUtils::Mkbootstrap::Verbose = 0;
        
        # if arguments contain '-l' or '-L' or '-R' print dl_findfile message
        eval{ Mkbootstrap('dasboot', '-Larry') };
        is( $@, '', 'should be able to open a file again');

        $file_is_ready = open(IN, 'dasboot.bs');
}

SKIP: {
        skip("cannot open dasboot.bs for reading: $!", 3) unless $file_is_ready;

        my $file = do { local $/ = <IN> };
        is( $out->read, "Writing dasboot.bs\n", 'should hush without Verbose set' );

        # and find our hidden tribute to a fine example
        like( $file, qr/dl_findfile.+Larry/s, 'should load libraries if needed' );
        like( $file, qr/Wall\n1;\n/ms, 'should write $DynaLoader::bscode if set' );
}

close IN;
close OUT;

END {
        # clean things up, even on VMS
        1 while unlink(qw( mkboot.bso boot_BS dasboot.bs .bs ));
}