Add a test case to show #10348 has been fixed by #10566

This is part of the series of issues fixed by #10547. In particular, the changes from #10566 were relevant.

See #10348 for the bug description.

Co-authored-by: Grégoire Paris <postmaster@greg0ire.fr>

tests/Doctrine/Tests/ORM/Functional/Ticket/GH10348Test.php

@@ -0,0 +1,108 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Doctrine\ORM\Mapping as ORM;
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+final class GH10348Test extends OrmFunctionalTestCase
+{
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->setUpEntitySchema([
+            GH10348Person::class,
+            GH10348Company::class,
+        ]);
+    }
+
+    public function testCanRemoveParentWithSelfReferencingChild(): void
+    {
+        $person1         = new GH10348Person();
+        $person2         = new GH10348Person();
+        $person2->mentor = $person1;
+
+        $company = new GH10348Company();
+        $company->addEmployee($person1)->addEmployee($person2);
+
+        $this->_em->persist($company);
+        $this->_em->flush();
+
+        $company = $this->_em->find(GH10348Company::class, $company->id);
+
+        $this->_em->remove($company);
+        $this->_em->flush();
+
+        self::assertEmpty($this->_em->createQuery('SELECT c FROM ' . GH10348Company::class . ' c')->getResult());
+        self::assertEmpty($this->_em->createQuery('SELECT p FROM ' . GH10348Person::class . ' p')->getResult());
+    }
+}
+
+/**
+ * @ORM\Entity
+ */
+class GH10348Person
+{
+    /**
+     * @ORM\Id
+     * @ORM\Column(type="integer")
+     * @ORM\GeneratedValue
+     *
+     * @var ?int
+     */
+    public $id = null;
+
+    /**
+     * @ORM\ManyToOne(targetEntity="GH10348Company", inversedBy="employees")
+     *
+     * @var ?GH10348Company
+     */
+    public $employer = null;
+
+    /**
+     * @ORM\ManyToOne(targetEntity="GH10348Person", cascade={"remove"})
+     *
+     * @var ?GH10348Person
+     */
+    public $mentor = null;
+}
+
+/**
+ * @ORM\Entity
+ */
+class GH10348Company
+{
+    /**
+     * @ORM\Id
+     * @ORM\Column(type="integer")
+     * @ORM\GeneratedValue
+     *
+     * @var ?int
+     */
+    public $id = null;
+
+    /**
+     * @ORM\OneToMany(targetEntity="GH10348Person", mappedBy="emplo", cascade={"persist", "remove"})
+     *
+     * @var Collection
+     */
+    private $employees;
+
+    public function __construct()
+    {
+        $this->employees = new ArrayCollection();
+    }
+
+    public function addEmployee(GH10348Person $person): self
+    {
+        $person->employer = $this;
+        $this->employees->add($person);
+
+        return $this;
+    }
+}