Add basic test coverage for insert_hooked_blocks

tests/phpunit/tests/blocks/insertHookedBlocks.php

@@ -0,0 +1,34 @@
+<?php
+/**
+ * Tests for the insert_hooked_blocks function.
+ *
+ * @package WordPress
+ * @subpackage Blocks
+ *
+ * @since 6.5.0
+ *
+ * @group blocks
+ * @group block-hooks
+ */
+class Tests_Blocks_InsertHookedBlocks extends WP_UnitTestCase {
+	/**
+	 * @covers ::insert_hooked_blocks
+	 */
+	public function test_insert_hooked_blocks() {
+		$anchor_block_name = 'tests/anchor-block';
+		$anchor_block      = array(
+			'blockName' => $anchor_block_name,
+		);
+
+		// Maybe move to class level and include other relative positions?
+		// And/or data provider?
+		$hooked_blocks = array(
+			$anchor_block_name => array(
+				'after' => array( 'tests/hooked-before' ),
+			)
+		);
+
+		$actual = insert_hooked_blocks( $anchor_block, 'after', $hooked_blocks, array() );
+		$this->assertSame( '<!-- wp:tests/hooked-before /-->', $actual );
+	}
+}