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archived-php-src/ext/gd/tests/bug22544.phpt
Christoph M. Becker dc09f30933 A picture is worth a thousand message digests
The bundled GD test suites makes heavy use of md5() to verify the result
of drawing operations. This leads to fragile tests (even a slight change
in a PNG header would cause failure, and of course there is the
possibility of collisions), and even worse, eventual test failures are
rather unrevealing.

Therefore we replace all md5() verification with a simplistic
test_image_equals_file(), which is basically a simplified port of libgd's
gdTestImageCompareToFile(), adapted to the needs of PHPTs.

In the long run better tests helpers should be introduced (see also
<http://news.php.net/php.internals/94081>), but for now this solution
is preferable over the former.

(cherry picked from commit 24f9e96792)
2016-09-11 12:56:53 +02:00

21 lines
562 B
PHP

--TEST--
Bug #22544 (TrueColor transparency in PNG images).
--SKIPIF--
<?php
if (!extension_loaded('gd')) {
die("skip gd extension not available\n");
}
?>
--FILE--
<?php
$image = imageCreateTruecolor(640, 100);
$transparent = imageColorAllocate($image, 0, 0, 0);
$red = imageColorAllocate($image, 255, 50, 50);
imageColorTransparent($image, $transparent);
imageFilledRectangle($image, 0, 0, 640-1, 100-1, $transparent);
include_once __DIR__ . '/func.inc';
test_image_equals_file(__DIR__ . '/bug22544.png', $image);
?>
--EXPECT--
The images are equal.