Add test case for caching $rectorConfig->rules() changed

packages-tests/Caching/Config/FileHashComputer/FileHashComputerTest.php

@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\Caching\Config\FileHashComputer;
+
+use PHPUnit\Framework\Attributes\RunInSeparateProcess;
+use Rector\Caching\Config\FileHashComputer;
+use Rector\Core\Configuration\Option;
+use Rector\Core\Configuration\Parameter\SimpleParameterProvider;
+use Rector\Testing\PHPUnit\AbstractLazyTestCase;
+
+final class FileHashComputerTest extends AbstractLazyTestCase
+{
+    private FileHashComputer $fileHashComputer;
+
+    protected function setUp(): void
+    {
+        $this->fileHashComputer = $this->make(FileHashComputer::class);
+    }
+
+    #[RunInSeparateProcess]
+    public function testRectorPhpChanged(): void
+    {
+        $this->bootFromConfigFiles([__DIR__ . '/Fixture/rector.php']);
+
+        $hashedFile = $this->fileHashComputer->compute(__DIR__ . '/Fixture/rector.php');
+
+        copy(__DIR__ . '/Fixture/rector.php', __DIR__ . '/Fixture/rector_temp.php');
+        copy(__DIR__ . '/Fixture/updated_rector_rule.php', __DIR__ . '/Fixture/rector.php');
+
+        SimpleParameterProvider::setParameter(Option::REGISTERED_RECTOR_RULES, null);
+
+        $this->bootFromConfigFiles([__DIR__ . '/Fixture/rector.php']);
+
+        $newHashedFile = $this->fileHashComputer->compute(__DIR__ . '/Fixture/rector.php');
+        rename(__DIR__ . '/Fixture/rector_temp.php', __DIR__ . '/Fixture/rector.php');
+
+        $this->assertNotSame($newHashedFile, $hashedFile);
+    }
+
+    #[RunInSeparateProcess]
+    public function testRectorPhpNotChanged(): void
+    {
+        $this->bootFromConfigFiles([__DIR__ . '/Fixture/rector.php']);
+
+        $hashedFile = $this->fileHashComputer->compute(__DIR__ . '/Fixture/rector.php');
+
+        copy(__DIR__ . '/Fixture/rector.php', __DIR__ . '/Fixture/rector_temp_equal.php');
+        copy(__DIR__ . '/Fixture/rector_rule_equals.php', __DIR__ . '/Fixture/rector.php');
+
+        SimpleParameterProvider::setParameter(Option::REGISTERED_RECTOR_RULES, null);
+
+        $this->bootFromConfigFiles([__DIR__ . '/Fixture/rector.php']);
+
+        $newHashedFile = $this->fileHashComputer->compute(__DIR__ . '/Fixture/rector.php');
+        rename(__DIR__ . '/Fixture/rector_temp_equal.php', __DIR__ . '/Fixture/rector.php');
+
+        $this->assertSame($newHashedFile, $hashedFile);
+    }
+}

packages-tests/Caching/Config/FileHashComputer/Fixture/rector.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\TypeDeclaration\Rector\StmtsAwareInterface\DeclareStrictTypesRector;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->rules([DeclareStrictTypesRector::class]);
+};

packages-tests/Caching/Config/FileHashComputer/Fixture/rector_rule_equals.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\TypeDeclaration\Rector\StmtsAwareInterface\DeclareStrictTypesRector;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->rules([
+
+        // only spaced/comment added, no need to clear cache
+        DeclareStrictTypesRector::class
+
+    ]);
+};

packages-tests/Caching/Config/FileHashComputer/Fixture/updated_rector_rule.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\DeadCode\Rector\Expression\RemoveDeadStmtRector;
+use Rector\TypeDeclaration\Rector\StmtsAwareInterface\DeclareStrictTypesRector;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->rules([
+        DeclareStrictTypesRector::class,
+        RemoveDeadStmtRector::class,
+    ]);
+};