fix tests

Author: sebastianMindee

src/Extraction/ImageExtractor.php

@@ -208,7 +208,7 @@ public function extractPolygonFromPage(
             throw new MindeeImageException($e->getMessage(), $e->getCode(), $e);
         }
         $format ??= $this->saveFormat;
-        $filename = sprintf('%s.%s_page%d-%d.%s', $filename ?? $this->filename, $format, $pageIndex, $index, $format);
+        $filename ??= sprintf('%s_page%d-%d.%s', $this->filename, $pageIndex, $index, $format);
         return new ExtractedImage($extractedImageData, $filename, $format, $pageIndex, $index);
     }
 

src/Geometry/BBoxUtils.php

@@ -37,8 +37,15 @@ public static function generateBBoxFromPolygons(array $polygons): ?BBox
         if (!$polygons) {
             return null;
         }
-        $merged = $polygons[0];
+        $merged = null;
         foreach ($polygons as $polygon) {
+            if (empty($polygon)) {
+                continue;
+            } else {
+                if (empty($merged)) {
+                    $merged = $polygon;
+                }
+            }
             if ($merged !== $polygon) {
                 $merged = PolygonUtils::merge($merged, $polygon);
             }

src/Parsing/SummaryHelper.php

@@ -20,7 +20,7 @@ class SummaryHelper
      */
     public static function formatFloat(?float $number): string
     {
-        if ($number == null) {
+        if ($number === null) {
             return '';
         }
         $formatted = number_format($number, 5, '.', '');