#6464 add test

tests/Doctrine/Tests/ORM/Functional/Ticket/GH6464Test.php

@@ -0,0 +1,89 @@
+<?php
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+/**
+ * @group GH-6464
+ */
+class GH6464Test extends OrmFunctionalTestCase
+{
+    /**
+     * {@inheritDoc}
+     */
+    protected function setUp()
+    {
+        parent::setUp();
+
+        $this->_schemaTool->createSchema(
+            [
+                $this->_em->getClassMetadata(GH6464Post::class),
+                $this->_em->getClassMetadata(GH6464User::class),
+                $this->_em->getClassMetadata(GH6464Author::class),
+            ]
+        );
+    }
+
+    /**
+     * Verifies that SqlWalker generates valid SQL for an INNER JOIN to CTI table
+     *
+     * SqlWalker needs to generate nested INNER JOIN statements, otherwise there would be INNER JOIN
+     * statements without an ON clause, which are valid on e.g. MySQL but rejected by PostgreSQL.
+     */
+    public function testIssue()
+    {
+
+        $qb = $this->_em->createQueryBuilder();
+
+        $query = $qb
+            ->select('p', 'a')
+            ->from(GH6464Post::class, 'p')
+            ->innerJoin(GH6464Author::class, 'a', 'WITH', 'p.authorId = a.id')
+            ->getQuery();
+
+        $this->assertNotRegExp(
+            '/INNER JOIN \w+ \w+ INNER JOIN/',
+            $query->getSQL(),
+            'As of GH-6464, every INNER JOIN should have an ON clause, which is missing here'
+        );
+
+        // Query shouldn't yield a result, yet it shouldn't crash (anymore)
+        $this->assertEquals([], $query->getResult());
+    }
+}
+
+/** @Entity */
+class GH6464Post
+{
+    /** @Id @Column(type="integer") @GeneratedValue */
+    public $id;
+
+    /** @Column(type="integer") */
+    public $authorId;
+
+    /** @Column(length=100) */
+    public $title;
+
+    /** @Column(type="text") */
+    public $text;
+}
+
+/**
+ * @Entity
+ * @InheritanceType("JOINED")
+ * @DiscriminatorColumn(name="discr", type="string")
+ * @DiscriminatorMap({"author" = "GH6464Author"})
+ */
+abstract class GH6464User
+{
+    /** @Id @Column(type="integer") @GeneratedValue */
+    public $id;
+}
+
+/** @Entity */
+class GH6464Author extends GH6464User
+{
+    /** @Column(length=50) */
+    public $displayName;
+}