Add test coverage for filter

tests/phpunit/tests/blocks/insertHookedBlocks.php

@@ -79,4 +79,43 @@ public function test_insert_hooked_blocks_adds_to_ignored_hooked_blocks() {
 		$this->assertSame( array( self::HOOKED_BLOCK_TYPE, self::OTHER_HOOKED_BLOCK_TYPE ), $anchor_block['attrs']['metadata']['ignoredHookedBlocks'] );
 		$this->assertSame( '<!-- wp:' . self::OTHER_HOOKED_BLOCK_TYPE . ' /-->', $actual );
 	}
+
+	/**
+	 * @ticket 59572
+	 * @ticket 60126
+	 *
+	 * @covers ::insert_hooked_blocks
+	 */
+	public function test_insert_hooked_blocks_filter_can_set_attributes() {
+		$anchor_block = array(
+			'blockName'    => self::ANCHOR_BLOCK_TYPE,
+			'attrs'        => array(
+				'layout' => array(
+					'type' => 'constrained',
+				)
+			),
+			'innerContent' => array(),
+		);
+
+		$filter = function( $parsed_hooked_block, $relative_position, $parsed_anchor_block ) {
+			// Is the hooked block adjacent to the anchor block?
+			if ( 'before' !== $relative_position && 'after' !== $relative_position ) {
+				return $parsed_hooked_block;
+			}
+
+			// Does the anchor block have a layout attribute?
+			if ( isset( $parsed_anchor_block['attrs']['layout'] ) ) {
+				// Copy the anchor block's layout attribute to the hooked block.
+				$parsed_hooked_block['attrs']['layout'] = $parsed_anchor_block['attrs']['layout'];
+			}
+
+			return $parsed_hooked_block;
+		};
+		add_filter( 'hooked_block_' . SELF::HOOKED_BLOCK_TYPE, $filter, 10, 3 );
+		$actual = insert_hooked_blocks( $anchor_block, 'after', self::HOOKED_BLOCKS, array() );
+		remove_filter( 'hooked_block_' . SELF::HOOKED_BLOCK_TYPE, $filter, 10, 3 );
+
+		$this->assertSame( array( self::HOOKED_BLOCK_TYPE ), $anchor_block['attrs']['metadata']['ignoredHookedBlocks'] );
+		$this->assertSame( '<!-- wp:' . self::HOOKED_BLOCK_TYPE . ' {"layout":{"type":"constrained"}} /-->', $actual );
+	}
 }