diff --git a/README.md b/README.md
index 79709c9..08f022d 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 
 Why developers love CRUD? Because it's easy to automate work around it. Why developers hate DDD/CQRS? Boilerplates.
 
-Using this small app `proophgen` and single 15th lines `yaml` file you can generate a project that contains more than 20 files (with phpspec tests!) and start coding. No more boilerplates.
+Using this small app `proophgen` and single 15th lines `yaml` file you can generate a project that contains **40 files** (with phpspec tests!) and start coding. No more boilerplates.
 
 You can also use singe command to create your ValueObject, Command.
 
@@ -72,14 +72,25 @@ And there is your result (in v0.1.2):
 ./src/Model/ValueObject/Mail.php
 ./src/Model/ValueObject/Name.php
 ./src/Model/ValueObject/Password.php
+./spec/Infrastructure/Identity/EventSourcedSpec.php
+./spec/Infrastructure/Identity/InMemorySpec.php
+./spec/Infrastructure/User/EventSourcedSpec.php
+./spec/Infrastructure/User/InMemorySpec.php
 ./spec/Model/Command/LoginUserSpec.php
 ./spec/Model/Command/RegisterUserSpec.php
 ./spec/Model/CommandHandler/LoginUserHandlerSpec.php
 ./spec/Model/CommandHandler/RegisterUserHandlerSpec.php
+./spec/Model/Identity/Event/EmailIdentityCreatedSpec.php
+./spec/Model/Identity/Event/UserLoggedSpec.php
+./spec/Model/Identity/Event/UserToIdentityAssignedSpec.php
+./spec/Model/Identity/Exception/IdentityNotFoundSpec.php
+./spec/Model/IdentitySpec.php
+./spec/Model/User/Event/UserRegisteredSpec.php
+./spec/Model/User/Exception/UserNotFoundSpec.php
+./spec/Model/UserSpec.php
 ./spec/Model/ValueObject/MailSpec.php
 ./spec/Model/ValueObject/NameSpec.php
 ./spec/Model/ValueObject/PasswordSpec.php
-
 ```
 
 ## Create single ValueObject
diff --git a/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/AggregateRootCodeGeneratorSpec.php b/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/AggregateRootCodeGeneratorSpec.php
index c2b5994..5b771aa 100644
--- a/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/AggregateRootCodeGeneratorSpec.php
+++ b/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/AggregateRootCodeGeneratorSpec.php
@@ -76,6 +76,7 @@ class User extends AggregateRoot {
 \t}
 
 \tprivate function whenUserRegistered(UserRegistered \$event): void {
+\t\t\$this->id = \$event->aggregateId();
 \t}
 }
 ";
diff --git a/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecAggregateCodeSpec.php b/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecAggregateCodeSpec.php
index f64fae9..071f6d3 100644
--- a/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecAggregateCodeSpec.php
+++ b/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecAggregateCodeSpec.php
@@ -5,6 +5,8 @@
 use gossi\codegen\generator\CodeFileGenerator;
 use Pilsniak\GossiCodeGenerator\AggregateRootGenerator\PhpSpecGenerator\PhpSpecAggregateCode;
 use PhpSpec\ObjectBehavior;
+use Pilsniak\ProophGen\Model\AggregateRoot;
+use Pilsniak\ProophGen\Model\Event;
 use Prophecy\Argument;
 
 class PhpSpecAggregateCodeSpec extends ObjectBehavior
@@ -21,8 +23,58 @@ function let()
         $this->beConstructedWith($generator);
     }
 
-    function it_is_initializable()
+    function it_generates_code_with_event_non_creator()
     {
-        $this->shouldHaveType(PhpSpecAggregateCode::class);
+        $content = "<?php
+declare(strict_types=1);
+
+namespace spec\Model;
+
+use Model\User;
+use PhpSpec\ObjectBehavior;
+use Prophecy\Argument;
+
+class UserSpec extends ObjectBehavior {
+
+\tpublic function it_can_registerUser() {
+\t\t\$this->registerUser();
+\t}
+
+\tpublic function it_returns_id() {
+\t\t\$this->id()->shouldBe('id');
+\t}
+}
+";
+        $aggregateRoot = new AggregateRoot('Model\User', [new Event('UserRegistered')]);
+        $this->execute($aggregateRoot)->filename()->shouldBe('./spec/Model/UserSpec.php');
+        $this->execute($aggregateRoot)->fileContent()->shouldBe($content);
+    }
+
+    function it_generates_code_with_event_creator()
+    {
+        $content = "<?php
+declare(strict_types=1);
+
+namespace spec\Model;
+
+use Model\User;
+use PhpSpec\ObjectBehavior;
+use Prophecy\Argument;
+
+class UserSpec extends ObjectBehavior {
+
+\tpublic function it_returns_id() {
+\t\t\$this->id()->shouldBe('id');
+\t}
+
+\tpublic function let() {
+\t\t\$this->beConstructedThrough('registerUser', ['id']);
+\t}
+}
+";
+        $aggregateRoot = new AggregateRoot('Model\User', [new Event('UserRegistered', true)]);
+        $this->execute($aggregateRoot)->filename()->shouldBe('./spec/Model/UserSpec.php');
+        $this->execute($aggregateRoot)->fileContent()->shouldBe($content);
     }
+
 }
diff --git a/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecEventSpec.php b/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecEventSpec.php
index 5622254..2286b93 100644
--- a/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecEventSpec.php
+++ b/spec/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecEventSpec.php
@@ -5,6 +5,8 @@
 use gossi\codegen\generator\CodeFileGenerator;
 use Pilsniak\GossiCodeGenerator\AggregateRootGenerator\PhpSpecGenerator\PhpSpecEvent;
 use PhpSpec\ObjectBehavior;
+use Pilsniak\ProophGen\Model\AggregateRoot;
+use Pilsniak\ProophGen\Model\Event;
 use Prophecy\Argument;
 
 class PhpSpecEventSpec extends ObjectBehavior
@@ -20,8 +22,29 @@ function let()
 
         $this->beConstructedWith($generator);
     }
-    function it_is_initializable()
+    function it_generates_code()
     {
-        $this->shouldHaveType(PhpSpecEvent::class);
+        $content = "<?php
+declare(strict_types=1);
+
+namespace spec\Model\User\Event;
+
+use Model\User\Event\UserRegistered;
+use PhpSpec\ObjectBehavior;
+use Prophecy\Argument;
+
+class UserRegisteredSpec extends ObjectBehavior {
+
+\tpublic function it_is_created_with_id() {
+\t\t\$this->beConstructedThrough('create', ['id']);
+\t\t\$this->aggregateId()->shouldBe('id');
+\t}
+}
+";
+
+        $event = new Event('UserRegistered');
+        $aggregateRoot = new AggregateRoot('Model\User', [$event]);
+        $this->execute($aggregateRoot, $event)->filename()->shouldBe('./spec/Model/User/Event/UserRegisteredSpec.php');
+        $this->execute($aggregateRoot, $event)->fileContent()->shouldBe($content);
     }
 }
diff --git a/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/AggregateRootCodeGenerator.php b/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/AggregateRootCodeGenerator.php
index 6026478..2a575d5 100644
--- a/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/AggregateRootCodeGenerator.php
+++ b/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/AggregateRootCodeGenerator.php
@@ -92,6 +92,7 @@ private function getContentAggregateRoot(AggregateRoot $aggregateRoot): string
                     ->addParameter(PhpParameter::create('event')->setType($event->name()))
                     ->setType('void')
                     ->setVisibility('private')
+                    ->setBody($this->generateBodyForWhenMethod($event))
             );
         }
 
@@ -126,4 +127,12 @@ private function defaultEventMethod(PhpClass $class, Event $event)
                 ->setType('void')
         );
     }
+
+    private function generateBodyForWhenMethod(Event $event): string
+    {
+        if (!$event->isCreator()) {
+            return '';
+        }
+        return '$this->id = $event->aggregateId();';
+    }
 }
diff --git a/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecAggregateCode.php b/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecAggregateCode.php
index 980a4ea..353c5b1 100644
--- a/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecAggregateCode.php
+++ b/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecAggregateCode.php
@@ -3,7 +3,10 @@
 namespace Pilsniak\GossiCodeGenerator\AggregateRootGenerator\PhpSpecGenerator;
 
 use gossi\codegen\generator\CodeFileGenerator;
+use gossi\codegen\model\PhpClass;
+use gossi\codegen\model\PhpMethod;
 use Pilsniak\ProophGen\Model\AggregateRoot;
+use Pilsniak\ProophGen\Model\Event;
 use Pilsniak\ProophGen\Model\FileToSave;
 
 class PhpSpecAggregateCode
@@ -25,11 +28,51 @@ public function execute(AggregateRoot $aggregateRoot): FileToSave
 
     private function generateFileContent(AggregateRoot $aggregateRoot): string
     {
-        return '';
+        $phpClass = new PhpClass();
+        $phpClass->setQualifiedName('spec\\'.$aggregateRoot->qualifiedName().'Spec');
+        $phpClass->setParentClassName('ObjectBehavior');
+        $phpClass->addUseStatement('PhpSpec\ObjectBehavior');
+        $phpClass->addUseStatement('Prophecy\Argument');
+        $phpClass->addUseStatement($aggregateRoot->qualifiedName());
+
+        $phpClass->setMethod(
+            PhpMethod::create('it_returns_id')
+                ->setBody('$this->id()->shouldBe(\'id\');')
+        );
+
+        foreach ($aggregateRoot->events() as $event) {
+            if ($event->isCreator()) {
+                $phpClass->setMethod(
+                    PhpMethod::create('let')
+                        ->setBody('$this->beConstructedThrough(\''.$event->aggregateMethodName().'\', [\'id\']);')
+                );
+            } else {
+                $phpClass->setMethod(
+                    PhpMethod::create('it_can_' . $event->aggregateMethodName())
+                        ->setBody($this->generateBodyForEvent($aggregateRoot, $event))
+                );
+            }
+
+        }
+
+        return $this->codeFileGenerator->generate($phpClass);
     }
 
     private function generateFileName(AggregateRoot $aggregateRoot): string
     {
-        return '';
+        return str_replace(['./src/', '.php'], ['./spec/', 'Spec.php'], $aggregateRoot->path());
+    }
+
+    private function generateBodyForEvent(AggregateRoot $aggregateRoot, Event $event): string
+    {
+        if ($event->isCreator()) {
+            $body = '$this->beConstructedThrough(\''.$event->aggregateMethodName().'\', [\'id\']);' . "\n";
+            $body .= '$this->id()->shouldBe(\'id\');';
+
+            return $body;
+        }
+        $body = '$this->'.$event->aggregateMethodName().'();';
+
+        return $body;
     }
 }
diff --git a/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecEvent.php b/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecEvent.php
index efcc698..d524638 100644
--- a/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecEvent.php
+++ b/src/Pilsniak/GossiCodeGenerator/AggregateRootGenerator/PhpSpecGenerator/PhpSpecEvent.php
@@ -3,6 +3,8 @@
 namespace Pilsniak\GossiCodeGenerator\AggregateRootGenerator\PhpSpecGenerator;
 
 use gossi\codegen\generator\CodeFileGenerator;
+use gossi\codegen\model\PhpClass;
+use gossi\codegen\model\PhpMethod;
 use Pilsniak\ProophGen\Model\AggregateRoot;
 use Pilsniak\ProophGen\Model\Event;
 use Pilsniak\ProophGen\Model\FileToSave;
@@ -21,16 +23,36 @@ public function __construct(CodeFileGenerator $codeFileGenerator)
 
     public function execute(AggregateRoot $aggregateRoot, Event $event): FileToSave
     {
-        return new FileToSave($this->generateFileName($aggregateRoot), $this->generateFileContent($aggregateRoot));
+        return new FileToSave($this->generateFileName($aggregateRoot, $event), $this->generateFileContent($aggregateRoot, $event));
     }
 
-    private function generateFileContent(AggregateRoot $aggregateRoot): string
+    private function generateFileContent(AggregateRoot $aggregateRoot, Event $event): string
     {
-        return '';
+        $phpClass = new PhpClass();
+        $phpClass->setQualifiedName('spec\\'. $aggregateRoot->eventNamespace($event).'Spec');
+        $phpClass->setParentClassName('ObjectBehavior');
+        $phpClass->addUseStatement('PhpSpec\ObjectBehavior');
+        $phpClass->addUseStatement('Prophecy\Argument');
+        $phpClass->addUseStatement($aggregateRoot->eventNamespace($event));
+
+        $phpClass->setMethod(
+            PhpMethod::create('it_is_created_with_id')
+                ->setBody($this->generateBodyForCreateWithIdMethod($aggregateRoot, $event))
+        );
+
+        return $this->codeFileGenerator->generate($phpClass);
+    }
+
+    private function generateFileName(AggregateRoot $aggregateRoot, Event $event): string
+    {
+        return str_replace(['./src/', '.php'], ['./spec/', 'Spec.php'], $aggregateRoot->eventPath($event));
     }
 
-    private function generateFileName(AggregateRoot $aggregateRoot): string
+    private function generateBodyForCreateWithIdMethod(AggregateRoot $aggregateRoot, Event $event): string
     {
-        return '';
+        $body = '$this->beConstructedThrough(\'create\', [\'id\']);' . "\n";
+        $body .= '$this->aggregateId()->shouldBe(\'id\');';
+
+        return $body;
     }
 }