tepm : tests cssClassName with version logic

tests/unit/CoreImageTest.php

@@ -138,11 +138,6 @@ public function test_retrieve_core_image_media_details(): void {
 
 	public function test_retrieve_core_image_attributes(): void {
 
-		// 'cssClassName' does not appends additional classes in and above WP 6.3.
-		// if ( ! is_wp_version_compatible( '6.3' ) ) {
-			// $this->markTestSkipped( 'This test requires WP 6.3 or higher.' );
-		// }
-
 		$block_content = '<!-- wp:image {"lightbox":{"enabled":false},"align":"left","width":500,"height":500,"aspectRatio":"4/3","scale":"cover","sizeSlug":"full","linkDestination":"none", "id":' . $this->attachment_id . ',"className":"is-style-rounded", "style":{"color":{"duotone":"var:preset|duotone|purple-green"}},"borderColor":"vivid-red","lock":{"move":true,"remove":true},"className":"test-css-class-name"} -->
 							<figure class="wp-block-image size-full is-resized" id="test-anchor">
 							<a class="test-link-css-class" href="http://decoupled.local/dcf-1-0/" target="_blank" rel="https://www.youtube.com/ noreferrer noopener">
@@ -272,7 +267,7 @@ className
 				'align'           => 'left',
 				'caption'         => 'Align left',
 				'className'       => 'test-css-class-name',
-				'cssClassName'    => 'wp-duotone-varpresetduotonepurple-green-19 wp-block-image size-full is-resized', // @todo : fix
+				'cssClassName'    => ( ! is_wp_version_compatible( '6.3' ) ) ? 'wp-duotone-varpresetduotonepurple-green-19 wp-block-image size-full is-resized' : 'wp-block-image size-full is-resized', // This uses the old class name for WP < 6.3 which is wp-duotone-varpresetduotonepurple-green-19.
 				'url'             => 'http://mysite.local/wp-content/uploads/2023/05/online-programming-course-hero-section-bg.svg',
 				'borderColor'     => 'vivid-red',
 				'title'           => 'test-title',