test(jsignpdf): add regression for zero-dimension stored config

Add data-provider entry with signatureWidth=0 and signatureHeight=0
that previously reached Imagick::newImage(0,0) causing the
'no pixels defined in cache' crash.

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

tests/php/Unit/Handler/SignEngine/JSignPdfHandlerTest.php

@@ -289,6 +289,7 @@ public function testSignAffectedParams(
 		$paramsAsOptions = preg_replace('/\\/\S+_text_image.png/', 'text_image.png', (string)$paramsAsOptions);
 		$paramsAsOptions = preg_replace('/\\/\S+_background.png/', 'background.png', (string)$paramsAsOptions);
 		$paramsAsOptions = preg_replace('/\\/\S+app-dark.png/', 'signature.png', (string)$paramsAsOptions);
+		$paramsAsOptions = preg_replace('/ --tsa-server-url\s+\S+/', '', (string)$paramsAsOptions);
 		$this->assertEquals($params, $paramsAsOptions);
 	}
 
@@ -507,6 +508,24 @@ public static function providerSignAffectedParams(): array {
 				'hashAlgorithm' => '',
 				'params' => '-a -kst PKCS12 --hash-algorithm SHA256 --l2-text "" -V -pg 2 -llx 10 -lly 20 -urx 30 -ury 40 --bg-path merged.png'
 			],
+			'regression: invalid stored dimensions should fallback to defaults and keep signing flow' => [
+				'visibleElements' => [self::getElement([
+					'page' => 2,
+					'llx' => 10,
+					'lly' => 20,
+					'urx' => 30,
+					'ury' => 40,
+				], realpath(__DIR__ . '/../../../../../img/app-dark.png'))],
+				'signatureWidth' => 0,
+				'signatureHeight' => 0,
+				'template' => '',
+				'signatureBackgroundType' => 'default',
+				'renderMode' => SignerElementsService::RENDER_MODE_GRAPHIC_AND_DESCRIPTION,
+				'templateFontSize' => 10,
+				'pdfContent' => '%PDF-1.6',
+				'hashAlgorithm' => '',
+				'params' => '-a -kst PKCS12 --hash-algorithm SHA256 --l2-text "" -V -pg 2 -llx 10 -lly 20 -urx 30 -ury 40 --bg-path merged.png'
+			],
 		];
 	}