Fix: update assertions for image target format in MediaTest

Author: Sambit003

tests/PhpWordTests/Writer/WPS/MediaTest.php

@@ -38,7 +38,7 @@ public function testAddElement(): void
         Media::addElement('section', $imageElement);
         $elements = Media::getElements('section');
         self::assertCount(1, $elements);
-        self::assertEquals('section', $elements[0]['target']);
+        self::assertMatchesRegularExpression('/^image\d+\.jpg$/', $elements[0]['target']);
         self::assertEquals($imagePath, $elements[0]['source']);
         self::assertStringStartsWith('image1.', $elements[0]['target']);
 
@@ -47,18 +47,19 @@ public function testAddElement(): void
         Media::addElement('header', $headerImageElement);
         $headerElements = Media::getElements('header');
         self::assertCount(1, $headerElements);
-        self::assertEquals('header', $headerElements[0]['target']);
+        self::assertMatchesRegularExpression('/^image\d+\.jpg$/', $headerElements[0]['target']);
         self::assertEquals($imagePath, $headerElements[0]['source']);
-        self::assertStringStartsWith('image1.', $headerElements[0]['target']);
+        // The counter may increment, so check for image2.
+        self::assertStringStartsWith('image2.', $headerElements[0]['target']);
 
         // Add footer media
         $footerImageElement = new Image($imagePath);
         Media::addElement('footer', $footerImageElement);
         $footerElements = Media::getElements('footer');
         self::assertCount(1, $footerElements);
-        self::assertEquals('footer', $footerElements[0]['target']);
+        self::assertMatchesRegularExpression('/^image\d+\.jpg$/', $footerElements[0]['target']);
         self::assertEquals($imagePath, $footerElements[0]['source']);
-        self::assertStringStartsWith('image1.', $footerElements[0]['target']);
+        self::assertStringStartsWith('image3.', $footerElements[0]['target']);
 
         // Test invalid container type - Note: addElement doesn't validate docPart string anymore,
         // it just creates a new key in the $elements array.
@@ -67,6 +68,9 @@ public function testAddElement(): void
         Media::addElement('invalid', $invalidImageElement);
         $invalidElements = Media::getElements('invalid');
         self::assertCount(1, $invalidElements); // Element is added under 'invalid' key
+        self::assertMatchesRegularExpression('/^image\d+\.jpg$/', $invalidElements[0]['target']);
+        self::assertEquals($imagePath, $invalidElements[0]['source']);
+        self::assertStringStartsWith('image4.', $invalidElements[0]['target']);
 
         // Check counts for valid types remain unchanged by the 'invalid' add
         $allValidElements = ['section', 'header', 'footer'];