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wget/tests/WgetTests.pm

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Perl
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package WgetTest;
$VERSION = 0.01;
use strict;
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use warnings;
use Cwd;
use File::Path;
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use POSIX qw(locale_h);
use locale;
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our $WGETPATH = "../src/wget";
my @unexpected_downloads = ();
{
my %_attr_data = ( # DEFAULT
_cmdline => "",
_workdir => Cwd::getcwd(),
_errcode => 0,
_existing => {},
_input => {},
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_name => $0,
_output => {},
_server_behavior => {},
);
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sub _default_for
{
my ($self, $attr) = @_;
$_attr_data{$attr};
}
sub _standard_keys
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{
keys %_attr_data;
}
}
sub new {
my ($caller, %args) = @_;
my $caller_is_obj = ref($caller);
my $class = $caller_is_obj || $caller;
#print STDERR "class = ", $class, "\n";
#print STDERR "_attr_data {workdir} = ", $WgetTest::_attr_data{_workdir}, "\n";
my $self = bless {}, $class;
foreach my $attrname ($self->_standard_keys()) {
#print STDERR "attrname = ", $attrname, " value = ";
my ($argname) = ($attrname =~ /^_(.*)/);
if (exists $args{$argname}) {
#printf STDERR "Setting up $attrname\n";
$self->{$attrname} = $args{$argname};
} elsif ($caller_is_obj) {
#printf STDERR "Copying $attrname\n";
$self->{$attrname} = $caller->{$attrname};
} else {
#printf STDERR "Using default for $attrname\n";
$self->{$attrname} = $self->_default_for($attrname);
}
#print STDERR $attrname, '=', $self->{$attrname}, "\n";
}
#printf STDERR "_workdir default = ", $self->_default_for("_workdir");
return $self;
}
sub run {
my $self = shift;
my $result_message = "Test successful.\n";
my $errcode;
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$self->{_name} =~ s{.*/}{}; # remove path
$self->{_name} =~ s{\.[^.]+$}{}; # remove extension
printf "Running test $self->{_name}\n";
# Setup
my $new_result = $self->_setup();
chdir ("$self->{_workdir}/$self->{_name}/input");
if (defined $new_result) {
$result_message = $new_result;
$errcode = 1;
goto cleanup;
}
# Launch server
my $pid = $self->_fork_and_launch_server();
# Call wget
chdir ("$self->{_workdir}/$self->{_name}/output");
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my $cmdline = $self->{_cmdline};
$cmdline = $self->_substitute_port($cmdline);
print "Calling $cmdline\n";
$errcode =
($cmdline =~ m{^/.*})
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? system ($cmdline)
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: system ("$self->{_workdir}/$cmdline");
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$errcode >>= 8; # XXX: should handle abnormal error codes.
# Shutdown server
# if we didn't explicitely kill the server, we would have to call
# waitpid ($pid, 0) here in order to wait for the child process to
# terminate
kill ('TERM', $pid);
# Verify download
unless ($errcode == $self->{_errcode}) {
$result_message = "Test failed: wrong code returned (was: $errcode, expected: $self->{_errcode})\n";
goto cleanup;
}
my $error_str;
if ($error_str = $self->_verify_download()) {
$result_message = $error_str;
}
cleanup:
$self->_cleanup();
print $result_message;
return $errcode != $self->{_errcode} || ($error_str ? 1 : 0);
}
sub _setup {
my $self = shift;
#print $self->{_name}, "\n";
chdir ($self->{_workdir});
# Create temporary directory
mkdir ($self->{_name});
chdir ($self->{_name});
mkdir ("input");
mkdir ("output");
# Setup existing files
chdir ("output");
foreach my $filename (keys %{$self->{_existing}}) {
open (FILE, ">$filename")
or return "Test failed: cannot open pre-existing file $filename\n";
my $file = $self->{_existing}->{$filename};
print FILE $file->{content}
or return "Test failed: cannot write pre-existing file $filename\n";
close (FILE);
if (exists($file->{timestamp})) {
utime $file->{timestamp}, $file->{timestamp}, $filename
or return "Test failed: cannot set timestamp on pre-existing file $filename\n";
}
}
chdir ("../input");
$self->_setup_server();
chdir ($self->{_workdir});
return;
}
sub _cleanup {
my $self = shift;
chdir ($self->{_workdir});
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File::Path::rmtree ($self->{_name}) unless $ENV{WGET_TEST_NO_CLEANUP};
}
# not a method
sub quotechar {
my $c = ord( shift );
if ($c >= 0x7 && $c <= 0xD) {
return '\\' . qw(a b t n v f r)[$c - 0x7];
} else {
return sprintf('\\x%02x', $c);
}
}
# not a method
sub _show_diff {
my $SNIPPET_SIZE = 10;
my ($expected, $actual) = @_;
my $str = '';
my $explen = length $expected;
my $actlen = length $actual;
if ($explen != $actlen) {
$str .= "Sizes don't match: expected = $explen, actual = $actlen\n";
}
my $min = $explen <= $actlen? $explen : $actlen;
my $line = 1;
my $col = 1;
my $i;
for ($i=0; $i != $min; ++$i) {
last if substr($expected, $i, 1) ne substr($actual, $i, 1);
if (substr($expected, $i, 1) eq '\n') {
$line++;
$col = 0;
} else {
$col++;
}
}
my $snip_start = $i - ($SNIPPET_SIZE / 2);
if ($snip_start < 0) {
$SNIPPET_SIZE += $snip_start; # Take it from the end.
$snip_start = 0;
}
my $exp_snip = substr($expected, $snip_start, $SNIPPET_SIZE);
my $act_snip = substr($actual, $snip_start, $SNIPPET_SIZE);
$exp_snip =~s/[^[:print:]]/ quotechar($&) /ge;
$act_snip =~s/[^[:print:]]/ quotechar($&) /ge;
$str .= "Mismatch at line $line, col $col:\n";
$str .= " $exp_snip\n";
$str .= " $act_snip\n";
return $str;
}
sub _verify_download {
my $self = shift;
chdir ("$self->{_workdir}/$self->{_name}/output");
# use slurp mode to read file content
my $old_input_record_separator = $/;
undef $/;
while (my ($filename, $filedata) = each %{$self->{_output}}) {
open (FILE, $filename)
or return "Test failed: file $filename not downloaded\n";
my $content = <FILE>;
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my $expected_content = $filedata->{'content'};
$expected_content = $self->_substitute_port($expected_content);
unless ($content eq $expected_content) {
return "Test failed: wrong content for file $filename\n"
. _show_diff($expected_content, $content);
}
if (exists($filedata->{'timestamp'})) {
my ($dev, $ino, $mode, $nlink, $uid, $gid, $rdev, $size,
$atime, $mtime, $ctime, $blksize, $blocks) = stat FILE;
$mtime == $filedata->{'timestamp'}
or return "Test failed: wrong timestamp for file $filename\n";
}
close (FILE);
}
$/ = $old_input_record_separator;
# make sure no unexpected files were downloaded
chdir ("$self->{_workdir}/$self->{_name}/output");
__dir_walk('.',
sub { push @unexpected_downloads,
$_[0] unless (exists $self->{_output}{$_[0]} || $self->{_existing}{$_[0]}) },
sub { shift; return @_ } );
if (@unexpected_downloads) {
return "Test failed: unexpected downloaded files [" . join(', ', @unexpected_downloads) . "]\n";
}
return "";
}
sub __dir_walk {
my ($top, $filefunc, $dirfunc) = @_;
my $DIR;
if (-d $top) {
my $file;
unless (opendir $DIR, $top) {
warn "Couldn't open directory $DIR: $!; skipping.\n";
return;
}
my @results;
while ($file = readdir $DIR) {
next if $file eq '.' || $file eq '..';
my $nextdir = $top eq '.' ? $file : "$top/$file";
push @results, __dir_walk($nextdir, $filefunc, $dirfunc);
}
return $dirfunc ? $dirfunc->($top, @results) : () ;
} else {
return $filefunc ? $filefunc->($top) : () ;
}
}
sub _fork_and_launch_server
{
my $self = shift;
pipe(FROM_CHILD, TO_PARENT) or die "Cannot create pipe!";
select((select(TO_PARENT), $| = 1)[0]);
my $pid = fork();
if ($pid < 0) {
die "Cannot fork";
} elsif ($pid == 0) {
# child
close FROM_CHILD;
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# FTP Server has to start with english locale due to use of strftime month names in LIST command
setlocale(LC_ALL,"C");
$self->_launch_server(sub { print TO_PARENT "SYNC\n"; close TO_PARENT });
} else {
# father
close TO_PARENT;
chomp(my $line = <FROM_CHILD>);
close FROM_CHILD;
}
return $pid;
}
1;
# vim: et ts=4 sw=4