[DowngradePhp70][DowngradePhp80] Test for combine DowngradeScalarType…

…DeclarationRector + DowngradeStringReturnTypeOnToStringRector (#1751)

tests/Issues/DowngradeScalarString/DowngradeScalarStringTest.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Core\Tests\Issues\DowngradeScalarString;
+
+use Iterator;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+use Symplify\SmartFileSystem\SmartFileInfo;
+
+final class DowngradeScalarStringTest 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');
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/config/configured_rule.php';
+    }
+}

tests/Issues/DowngradeScalarString/Fixture/return_string.php.inc

@@ -0,0 +1,49 @@
+<?php
+
+namespace Rector\Core\Tests\Issues\DowngradeScalarString\Fixture;
+
+abstract class AbstractReturnString
+{
+    public function __toString(): string
+    {
+        return 'value';
+    }
+}
+
+class ReturnString extends AbstractReturnString
+{
+    public function __toString()
+    {
+        return 'value';
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Core\Tests\Issues\DowngradeScalarString\Fixture;
+
+abstract class AbstractReturnString
+{
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        return 'value';
+    }
+}
+
+class ReturnString extends AbstractReturnString
+{
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        return 'value';
+    }
+}
+
+?>

tests/Issues/DowngradeScalarString/config/configured_rule.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\DowngradePhp70\Rector\FunctionLike\DowngradeScalarTypeDeclarationRector;
+use Rector\DowngradePhp80\Rector\ClassMethod\DowngradeStringReturnTypeOnToStringRector;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $services = $containerConfigurator->services();
+    $services->set(DowngradeStringReturnTypeOnToStringRector::class);
+    $services->set(DowngradeScalarTypeDeclarationRector::class);
+};