Do not prepend a \ to the type, if it is already Fully Qualified (#1863)

* Do not prepend a \ to the type, if it is already Fully Qualified

* add test for issue #7023

* fix issue #7023 for php versions >= 7.4

* add test for issue #7023 with php version <= 7.3

* removed unused use

packages/PHPStanStaticTypeMapper/TypeMapper/ObjectTypeMapper.php

@@ -62,6 +62,10 @@ public function mapToPHPStanPhpDocTypeNode(Type $type, TypeKind $typeKind): Type
             return new IdentifierTypeNode($type->getClassName());
         }
 
+        if ($type instanceof FullyQualifiedObjectType && str_starts_with($type->getClassName(), '\\')) {
+            return new IdentifierTypeNode($type->getClassName());
+        }
+
         return new IdentifierTypeNode('\\' . $type->getClassName());
     }
 
@@ -83,7 +87,13 @@ public function mapToPhpParserNode(Type $type, TypeKind $typeKind): ?Node
         }
 
         if ($type instanceof FullyQualifiedObjectType) {
-            return new FullyQualified($type->getClassName());
+            $className = $type->getClassName();
+
+            if(str_starts_with($className, '\\')) {
+                // skip leading \
+                return new FullyQualified(substr($className, 1));
+            }
+            return new FullyQualified($className);
         }
 
         if (! $type instanceof GenericObjectType) {

tests/Issues/Issue7023/DoNotPrependAnotherBackslashIfAlreadyPresent73Test.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Core\Tests\Issues\Issue7023;
+
+use Iterator;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+use Symplify\SmartFileSystem\SmartFileInfo;
+
+/**
+ * @see https://github.com/rectorphp/rector/issues/7023
+ */
+final class DoNotPrependAnotherBackslashIfAlreadyPresent73Test extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideData()
+     */
+    public function test(SmartFileInfo $fileInfo): void
+    {
+        $this->doTestFileInfo($fileInfo);
+    }
+
+    /**
+     * @return Iterator<SmartFileInfo>
+     */
+    public function provideData(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture/7.3');
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/config/configured_rule_73.php';
+    }
+}

tests/Issues/Issue7023/DoNotPrependAnotherBackslashIfAlreadyPresentTest.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Core\Tests\Issues\Issue7023;
+
+use Iterator;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+use Symplify\SmartFileSystem\SmartFileInfo;
+
+/**
+ * @see https://github.com/rectorphp/rector/issues/7023
+ */
+final class DoNotPrependAnotherBackslashIfAlreadyPresentTest extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideData()
+     */
+    public function test(SmartFileInfo $fileInfo): void
+    {
+        $this->doTestFileInfo($fileInfo);
+    }
+
+    /**
+     * @return Iterator<SmartFileInfo>
+     */
+    public function provideData(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture/7.4');
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/config/configured_rule.php';
+    }
+}

tests/Issues/Issue7023/Fixture/7.3/fixture.php.inc

@@ -0,0 +1,43 @@
+<?php
+
+namespace Rector\Core\Tests\Issues\Issue7023\Fixture;
+
+use Doctrine\ORM\Mapping as ORM;
+use Acme\Entity\User;
+
+/**
+ * @ORM\Entity
+ */
+class Fixture
+{
+
+    /**
+     * @ORM\ManyToOne(targetEntity="\Acme\Entity\User", inversedBy="images")
+     * @ORM\JoinColumn(name="data_id", nullable=true)
+     * @var User
+     */
+    private $user;
+}
+?>
+-----
+<?php
+
+namespace Rector\Core\Tests\Issues\Issue7023\Fixture;
+
+use Doctrine\ORM\Mapping as ORM;
+use Acme\Entity\User;
+
+/**
+ * @ORM\Entity
+ */
+class Fixture
+{
+
+    /**
+     * @ORM\ManyToOne(targetEntity="\Acme\Entity\User", inversedBy="images")
+     * @ORM\JoinColumn(name="data_id", nullable=true)
+     * @var \Acme\Entity\User|null
+     */
+    private $user;
+}
+?>

tests/Issues/Issue7023/Fixture/7.4/fixture.php.inc

@@ -0,0 +1,43 @@
+<?php
+
+namespace Rector\Core\Tests\Issues\Issue7023\Fixture;
+
+use Doctrine\ORM\Mapping as ORM;
+use Acme\Entity\User;
+
+/**
+ * @ORM\Entity
+ */
+class Fixture
+{
+
+    /**
+     * @ORM\ManyToOne(targetEntity="\Acme\Entity\User", inversedBy="images")
+     * @ORM\JoinColumn(name="data_id", nullable=true)
+     * @var User
+     */
+    private $user;
+}
+?>
+-----
+<?php
+
+namespace Rector\Core\Tests\Issues\Issue7023\Fixture;
+
+use Doctrine\ORM\Mapping as ORM;
+use Acme\Entity\User;
+
+/**
+ * @ORM\Entity
+ */
+class Fixture
+{
+
+    /**
+     * @ORM\ManyToOne(targetEntity="\Acme\Entity\User", inversedBy="images")
+     * @ORM\JoinColumn(name="data_id", nullable=true)
+     * @var User
+     */
+    private ?\Acme\Entity\User $user = null;
+}
+?>

tests/Issues/Issue7023/config/configured_rule.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Doctrine\Rector\Property\TypedPropertyFromToOneRelationTypeRector;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $services = $containerConfigurator->services();
+    $services->set(TypedPropertyFromToOneRelationTypeRector::class);
+};

tests/Issues/Issue7023/config/configured_rule_73.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Core\Configuration\Option;
+use Rector\Core\ValueObject\PhpVersionFeature;
+use Rector\Doctrine\Rector\Property\TypedPropertyFromToOneRelationTypeRector;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $parameters = $containerConfigurator->parameters();
+    $parameters->set(Option::PHP_VERSION_FEATURES, PhpVersionFeature::TYPED_PROPERTIES - 1);
+
+    $services = $containerConfigurator->services();
+    $services->set(TypedPropertyFromToOneRelationTypeRector::class);
+};