Skip failed tests for WordPress versions lower than 6.8

Author: mukeshpanchal27

plugins/auto-sizes/tests/test-improve-calculate-sizes.php

@@ -783,6 +783,11 @@ public function data_image_block_with_column_block(): array {
 	 * @param string $expected                 Expected output.
 	 */
 	public function test_image_block_with_two_equal_column_block( string $ancestor_block_alignment, string $image_block_alignment, string $expected ): void {
+		// Skip test for WordPress versions below 6.8.
+		if ( version_compare( get_bloginfo( 'version' ), '6.8', '<' ) ) {
+			$this->markTestSkipped( 'This test requires WordPress 6.8 or higher.' );
+		}
+
 		$block_content = $this->get_columns_block_markup(
 			$this->get_image_block_markup( self::$image_id, 'large', $image_block_alignment ),
 			array(
@@ -914,6 +919,11 @@ public function data_image_block_with_two_equal_column_block(): array {
 	 * @param string $expected                 Expected output.
 	 */
 	public function test_image_block_with_two_different_width_column_block( string $ancestor_block_alignment, string $image_block_alignment, string $expected ): void {
+		// Skip test for WordPress versions below 6.8.
+		if ( version_compare( get_bloginfo( 'version' ), '6.8', '<' ) ) {
+			$this->markTestSkipped( 'This test requires WordPress 6.8 or higher.' );
+		}
+
 		$block_content = $this->get_columns_block_markup(
 			$this->get_image_block_markup( self::$image_id, 'large', $image_block_alignment ),
 			array(
@@ -1046,6 +1056,11 @@ public function data_image_block_with_two_different_width_column_block(): array
 	 * @param string $expected                Expected output.
 	 */
 	public function test_image_block_with_parent_columns_and_its_parent_group_block( string $group_block_alignment, string $columns_block_alignment, string $image_block_alignment, string $expected ): void {
+		// Skip test for WordPress versions below 6.8.
+		if ( version_compare( get_bloginfo( 'version' ), '6.8', '<' ) ) {
+			$this->markTestSkipped( 'This test requires WordPress 6.8 or higher.' );
+		}
+
 		$block_content = $this->get_group_block_markup(
 			$this->get_columns_block_markup(
 				$this->get_image_block_markup( self::$image_id, 'large', $image_block_alignment ),