Add test for reflection filename correctness

tests/Fixtures/project/src/Application/Main.php

@@ -25,4 +25,10 @@ public function doSomethingElse()
     {
         echo 'I did something else';
     }
+
+    public function getFilename()
+    {
+        $reflectedClass = new \ReflectionClass($this);
+        return $reflectedClass->getFileName();
+    }
 }

tests/Fixtures/project/src/Aspect/InitializationAspect.php

@@ -25,6 +25,6 @@ public function beforeInstanceInitialization()
      */
     public function afterClassStaticInitialization()
     {
-        echo 'It invokes after class is loaded into memory.';
+        // echo 'It invokes after class is loaded into memory.';
     }
 }

tests/Go/Functional/BaseFunctionalTest.php

@@ -68,12 +68,10 @@ protected function clearCache()
 
     /**
      * Warms up Go! AOP cache.
-     *
-     * @return string Command output.
      */
-    protected function warmUp(): string
+    protected function warmUp(): void
     {
-        return $this->execute('cache:warmup:aop');
+        $this->execute('cache:warmup:aop');
     }
 
     /**

tests/Go/Functional/ReflectionFilenameTest.php

@@ -0,0 +1,49 @@
+<?php
+declare(strict_types = 1);
+
+namespace Go\Functional;
+
+use Go\Core\AspectKernel;
+use Go\ParserReflection\ReflectionClass;
+use Go\Tests\TestProject\Application\Main;
+use Go\Instrument\Transformer\FilterInjectorTransformer;
+
+class ReflectionFilenameTest extends BaseFunctionalTest
+{
+    protected function warmUp(): void
+    {
+        $loader = $this->configuration['frontController'];
+        $path = stream_resolve_include_path($loader);
+        if (!is_readable($path)) {
+            throw new \InvalidArgumentException("Invalid loader path: {$loader}");
+        }
+
+        ob_start();
+        include_once $path;
+        ob_end_clean();
+
+        if (!class_exists(AspectKernel::class, false)) {
+            $message = "Kernel was not initialized yet, please configure it in the {$path}";
+            throw new \InvalidArgumentException($message);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function tearDown()
+    {
+        parent::tearDown();
+        $reflectedClass = new \ReflectionClass(FilterInjectorTransformer::class);
+        $reflectedProperty = $reflectedClass->getProperty('kernel');
+        $reflectedProperty->setAccessible(true);
+        $reflectedProperty = $reflectedProperty->setValue(null);
+    }
+
+    public function testReflectionFilenameIsCorrect()
+    {
+        $filename = (new ReflectionClass(Main::class))->getFileName();
+        $main = new Main();
+        $this->assertEquals($filename, $main->getFilename());
+    }
+}