From 6467467bd27fe7203a3246524ed302495466e3a0 Mon Sep 17 00:00:00 2001
From: Peter Wilson <519727+peterwilsoncc@users.noreply.github.com>
Date: Wed, 16 Nov 2022 14:38:11 +1100
Subject: [PATCH 1/2] Test for #57122.

---
 tests/phpunit/tests/menu/wp-nav-menu.php | 48 ++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/tests/phpunit/tests/menu/wp-nav-menu.php b/tests/phpunit/tests/menu/wp-nav-menu.php
index 08f105be9a76..a4460f577839 100644
--- a/tests/phpunit/tests/menu/wp-nav-menu.php
+++ b/tests/phpunit/tests/menu/wp-nav-menu.php
@@ -197,4 +197,52 @@ public function test_wp_nav_menu_should_not_have_has_children_class_with_custom_
 			'Level 3 should not be present in the HTML output.'
 		);
 	}
+
+	/**
+	 * Test that the order in which menu items are created does not matter.
+	 *
+	 * @ticket 57122
+	 */
+	public function test_parent_with_higher_id_should_not_error() {
+		// Create a new level zero menu item.
+		$new_lvl0_menu_item = wp_update_nav_menu_item(
+			self::$menu_id,
+			0,
+			array(
+				'menu-item-title'  => 'Root menu item with high ID',
+				'menu-item-url'    => '#',
+				'menu-item-status' => 'publish',
+			)
+		);
+
+		// Reparent level 1 menu item to the new level zero menu item.
+		self::$lvl1_menu_item = wp_update_nav_menu_item(
+			self::$menu_id,
+			self::$lvl1_menu_item,
+			array(
+				'menu-item-parent-id' => $new_lvl0_menu_item,
+			)
+		);
+
+		// Delete the old level zero menu item.
+		wp_delete_post( self::$lvl0_menu_item, true );
+
+		// Render the menu.
+		$menu_html = wp_nav_menu(
+			array(
+				'menu' => self::$menu_id,
+				'echo' => false,
+			)
+		);
+
+		$this->assertStringContainsString(
+			sprintf(
+				'<li id="menu-item-%1$d" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-%1$d">',
+				$new_lvl0_menu_item
+			),
+			$menu_html,
+			'The level zero menu item should appear in the menu.'
+		);
+
+	}
 }

From ae45998dad47abbb5c770e25a38e8ddcba1c3b4c Mon Sep 17 00:00:00 2001
From: Peter Wilson <519727+peterwilsoncc@users.noreply.github.com>
Date: Tue, 14 Feb 2023 14:10:41 +1100
Subject: [PATCH 2/2] Improve description.

---
 tests/phpunit/tests/menu/wp-nav-menu.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/phpunit/tests/menu/wp-nav-menu.php b/tests/phpunit/tests/menu/wp-nav-menu.php
index a4460f577839..298b222e0115 100644
--- a/tests/phpunit/tests/menu/wp-nav-menu.php
+++ b/tests/phpunit/tests/menu/wp-nav-menu.php
@@ -199,7 +199,7 @@ public function test_wp_nav_menu_should_not_have_has_children_class_with_custom_
 	}
 
 	/**
-	 * Test that the order in which menu items are created does not matter.
+	 * The order in which parent/child menu items are created should not matter.
 	 *
 	 * @ticket 57122
 	 */