public function testCoalesce()
{
$width = null;
$height = null;
$resource = new \Imagick();
$resource->newImage(20, 10, new \ImagickPixel("black"));
$resource->newImage(10, 10, new \ImagickPixel("black"));
$layers = new Layers(new Image($resource), $resource);
$layers->coalesce();
foreach ($layers as $layer) {
$size = $layer->getSize();
if ($width === null) {
$width = $size->getWidth();
} else {
$this->assertEquals($width, $size->getWidth());
}
if ($height === null) {
$height = $size->getHeight();
} else {
$this->assertEquals($height, $size->getHeight());
}
}
}
