Add FakeApp class and serialization test

The new class FakeApp has been implemented for testing purposes. In addition, new test cases have been added to CompileInjectorTest to verify the correct serialization and deserialization of the new FakeApp class. The serialization test requires PHP version 7.4 or higher.

tests/CompileInjectorTest.php

@@ -106,4 +106,17 @@ public function testCompileFaillureLog(): void
         $log = (string) file_get_contents($logFile);
         $this->assertStringContainsString('Error', $log);
     }
+
+    /** @requires PHP >= 7.4 */
+    public function testSeirialzeInAarray()
+    {
+        $app = new FakeApp(new CompileInjector(__DIR__ . '/tmp', new FakeLazyModule()));
+        $serializedApp = serialize($app);
+        $unserializedApp = unserialize($serializedApp);
+
+        assert($unserializedApp instanceof FakeApp);
+
+        $instance = $unserializedApp->i->getInstance(FakeCarInterface::class);
+        $this->assertInstanceOf(FakeCar::class, $instance);
+    }
 }

tests/Fake/FakeApp.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ray\Compiler;
+
+use Ray\Di\InjectorInterface;
+
+final class FakeApp
+{
+    public $injector;
+
+    public function __construct(InjectorInterface $injector)
+    {
+        $this->injector = $injector;
+    }
+
+    public function __serialize(): array
+    {
+        return ['injector' => $this->injector];
+    }
+
+    public function __unserialize(array $data)
+    {
+        $this->injector = $data['injector'];
+    }
+}