/
t60writefail.t
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/
t60writefail.t
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#!perl -w
use strict;
use Test::More tests => 69;
use Imager ':handy';
# this file tries to cover as much of the write error handling cases in
# msicon.c/imicon.c as possible.
#
# coverage checked with gcc/gcov
# image too big for format tests, for each entry point
{
my $im = Imager->new(xsize => 256, ysize => 255);
my $data;
ok(!$im->write(data => \$data, type=>'ico'),
"image too large");
is($im->errstr, "image too large for ico file", "check message");
}
{
my $im = Imager->new(xsize => 256, ysize => 255);
my $data;
ok(!Imager->write_multi({ data => \$data, type=>'ico' }, $im, $im),
"image too large");
is(Imager->errstr, "image too large for ico file", "check message");
Imager->_set_error('');
}
{
my $im = Imager->new(xsize => 256, ysize => 255);
my $data;
ok(!$im->write(data => \$data, type=>'cur'),
"image too large");
is($im->errstr, "image too large for ico file", "check message");
}
{
my $im = Imager->new(xsize => 256, ysize => 255);
my $data;
ok(!Imager->write_multi({ data => \$data, type=>'cur' }, $im),
"image too large");
is(Imager->errstr, "image too large for ico file", "check message");
Imager->_set_error('');
}
# low level write failure tests for each entry point (fail on close)
{
my $im = Imager->new(xsize => 10, ysize => 10);
ok(!$im->write(callback => \&write_failure, type=>'ico'),
"low level write failure (ico)");
is($im->errstr, "error closing output: synthetic error", "check message");
}
{
my $im = Imager->new(xsize => 10, ysize => 10);
ok(!$im->write(callback => \&write_failure, type=>'cur'),
"low level write failure (cur)");
is($im->errstr, "error closing output: synthetic error", "check message");
}
{
my $im = Imager->new(xsize => 10, ysize => 10);
ok(!Imager->write_multi({ callback => \&write_failure, type=>'ico' }, $im, $im),
"low level write_multi failure (ico)");
is(Imager->errstr, "error closing output: synthetic error", "check message");
Imager->_set_error('');
}
{
my $im = Imager->new(xsize => 10, ysize => 10);
ok(!Imager->write_multi({ callback => \&write_failure, type=>'cur' }, $im, $im),
"low level write_multi failure (cur)");
is(Imager->errstr, "error closing output: synthetic error", "check message");
Imager->_set_error('');
}
# low level write failure tests for each entry point (fail on write)
{
my $im = Imager->new(xsize => 10, ysize => 10);
ok(!$im->write(callback => \&write_failure, maxbuffer => 1, type=>'ico'),
"low level write failure (ico)");
is($im->errstr, "Write failure: synthetic error", "check message");
}
{
my $im = Imager->new(xsize => 10, ysize => 10);
ok(!$im->write(callback => \&write_failure, maxbuffer => 1, type=>'cur'),
"low level write failure (cur)");
is($im->errstr, "Write failure: synthetic error", "check message");
}
{
my $im = Imager->new(xsize => 10, ysize => 10);
ok(!Imager->write_multi({ callback => \&write_failure, maxbuffer => 1, type=>'ico' }, $im, $im),
"low level write_multi failure (ico)");
is(Imager->errstr, "Write failure: synthetic error", "check message");
Imager->_set_error('');
}
{
my $im = Imager->new(xsize => 10, ysize => 10);
ok(!Imager->write_multi({ callback => \&write_failure, maxbuffer => 1, type=>'cur' }, $im, $im),
"low level write_multi failure (cur)");
is(Imager->errstr, "Write failure: synthetic error", "check message");
Imager->_set_error('');
}
{
my $im = Imager->new(xsize => 10, ysize => 10);
ok(!$im->write(type => 'ico', callback => WriteLimit->new(6), maxbuffer => 1),
"second write (resource) should fail (ico)");
is($im->errstr, "Write failure: limit reached", "check message");
$im->_set_error('');
ok(!$im->write(type => 'cur', callback => WriteLimit->new(6), maxbuffer => 1),
"second (resource) write should fail (cur)");
is($im->errstr, "Write failure: limit reached", "check message");
$im->_set_error('');
ok(!$im->write(type => 'ico', callback => WriteLimit->new(22), maxbuffer => 1),
"third write (bmi) should fail (32-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
$im->_set_error('');
ok(!$im->write(type => 'ico', callback => WriteLimit->new(62), maxbuffer => 1),
"fourth write (data) should fail (32-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
$im->_set_error('');
ok(!$im->write(type => 'ico', callback => WriteLimit->new(462), maxbuffer => 1),
"mask write should fail (32-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
}
{ # 1 bit write fails
my $im = Imager->new(xsize => 10, ysize => 10, type => 'paletted');
my $red = NC(255, 0, 0);
my $blue = NC(0, 0, 255);
$im->addcolors(colors => [ $red, $blue ]);
$im->box(filled => 1, color => $red, ymax => 5);
$im->box(filled => 1, color => $blue, ymin => 6);
ok(!$im->write(type => 'ico', callback => WriteLimit->new(22), maxbuffer => 1),
"third write (bmi) should fail (1-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
ok(!$im->write(type => 'ico', callback => WriteLimit->new(66), maxbuffer => 1),
"fourth write (palette) should fail (1-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
ok(!$im->write(type => 'ico', callback => WriteLimit->new(74), maxbuffer => 1),
"fifth write (image) should fail (1-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
my $data;
ok($im->write(data => \$data, type => 'ico'), "write 1 bit successfully");
my $read = Imager->new;
ok($read->read(data => $data), "read it back");
is($read->type, 'paletted', "check type");
is($read->tags(name => 'ico_bits'), 1, "check bits");
is(Imager::i_img_diff($read, $im), 0, "check image correct");
}
{ # 4 bit write fails
my $im = Imager->new(xsize => 10, ysize => 10, type => 'paletted');
my $red = NC(255, 0, 0);
my $blue = NC(0, 0, 255);
$im->addcolors(colors => [ ($red, $blue) x 8 ]);
$im->box(filled => 1, color => $red, ymax => 5);
$im->box(filled => 1, color => $blue, ymin => 6);
ok(!$im->write(type => 'ico', callback => WriteLimit->new(22), maxbuffer => 1),
"third write (bmi) should fail (4-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
ok(!$im->write(type => 'ico', callback => WriteLimit->new(66), maxbuffer => 1),
"fourth write (palette) should fail (4-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
ok(!$im->write(type => 'ico', callback => WriteLimit->new(130), maxbuffer => 1),
"fifth write (image) should fail (4-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
my $data;
ok($im->write(data => \$data, type => 'ico'), "write 4 bit successfully");
my $read = Imager->new;
ok($read->read(data => $data), "read it back");
is($read->type, 'paletted', "check type");
is($read->tags(name => 'ico_bits'), 4, "check bits");
is(Imager::i_img_diff($read, $im), 0, "check image correct");
}
{ # 8 bit write fails
my $im = Imager->new(xsize => 10, ysize => 10, type => 'paletted');
my $red = NC(255, 0, 0);
my $blue = NC(0, 0, 255);
$im->addcolors(colors => [ ($red, $blue) x 9 ]);
$im->box(filled => 1, color => $red, ymax => 5);
$im->box(filled => 1, color => $blue, ymin => 6);
ok(!$im->write(type => 'ico', callback => WriteLimit->new(22), maxbuffer => 1),
"third write (bmi) should fail (8-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
ok(!$im->write(type => 'ico', callback => WriteLimit->new(62), maxbuffer => 1),
"fourth write (palette) should fail (8-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
ok(!$im->write(type => 'ico', callback => WriteLimit->new(62 + 1024), maxbuffer => 1),
"fifth write (image) should fail (8-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
ok(!$im->write(type => 'ico', callback => WriteLimit->new(62 + 1024 + 10), maxbuffer => 1),
"sixth write (zeroes) should fail (8-bit)");
is($im->errstr, "Write failure: limit reached", "check message");
my $data;
ok($im->write(data => \$data, type => 'ico'), "write 8 bit successfully");
my $read = Imager->new;
ok($read->read(data => $data), "read it back");
is($read->type, 'paletted', "check type");
is($read->tags(name => 'ico_bits'), 8, "check bits");
is(Imager::i_img_diff($read, $im), 0, "check image correct");
}
# write callback that fails
sub write_failure {
print "# synthesized write failure\n";
Imager::i_push_error(0, "synthetic error");
return;
}
package WriteLimit;
use overload
'&{}' => \&limited_write,
'bool' => sub { 1 };
sub new {
my ($class, $limit) = @_;
bless
{
do_write =>
sub {
my ($data) = @_;
$limit -= length $data;
if ($limit >= 0) {
print "# write of ", length $data, " bytes successful ($limit left)\n";
return 1;
}
else {
print "# write of ", length $data, " bytes failed\n";
Imager::i_push_error(0, "limit reached");
return;
}
}
},$class;
}
sub limited_write {
my ($self) = @_;
return $self->{do_write};
}