Step 00 — Squelette + intégration naïve

3 Bounded Contexts (Sales, Invoicing, LegacyFulfillment) avec :
- Domaines complets (agrégats, VOs, événements, invariants)
- Couche application (commands, queries, ports)
- Infrastructure in-memory (repos, gateway fake)
- Controllers HTTP Symfony
- Couplage naïf synchrone entre BC via NaiveSalesEventPublisher
- 20 tests unitaires et d'intégration passants

tests/Unit/LegacyFulfillment/Domain/ShipmentRequestTest.php

@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Tests\Unit\LegacyFulfillment\Domain;
+
+use MiniShop\LegacyFulfillment\Domain\Event\ShipmentRequested;
+use MiniShop\LegacyFulfillment\Domain\Model\LegacyOrderRef;
+use MiniShop\LegacyFulfillment\Domain\Model\ParcelSpec;
+use MiniShop\LegacyFulfillment\Domain\Model\ShipmentRequest;
+use MiniShop\LegacyFulfillment\Domain\Model\ShipmentStatus;
+use MiniShop\LegacyFulfillment\Domain\Model\ShippingAddress;
+use PHPUnit\Framework\TestCase;
+
+final class ShipmentRequestTest extends TestCase
+{
+    public function test_create_from_sales_order(): void
+    {
+        $request = $this->createRequest();
+
+        self::assertSame(ShipmentStatus::Requested, $request->status());
+        self::assertSame('order-1', $request->orderRef->toString());
+    }
+
+    public function test_create_records_event(): void
+    {
+        $request = $this->createRequest();
+
+        $events = $request->releaseEvents();
+        self::assertCount(1, $events);
+        self::assertInstanceOf(ShipmentRequested::class, $events[0]);
+    }
+
+    public function test_mark_dispatched(): void
+    {
+        $request = $this->createRequest();
+
+        $request->markDispatched();
+
+        self::assertSame(ShipmentStatus::Dispatched, $request->status());
+    }
+
+    public function test_mark_dispatched_twice_throws(): void
+    {
+        $this->expectException(\DomainException::class);
+
+        $request = $this->createRequest();
+        $request->markDispatched();
+        $request->markDispatched();
+    }
+
+    public function test_parcel_with_zero_weight_throws(): void
+    {
+        $this->expectException(\InvalidArgumentException::class);
+
+        new ParcelSpec(0, 'Widget');
+    }
+
+    private function createRequest(): ShipmentRequest
+    {
+        return ShipmentRequest::fromSalesOrder(
+            LegacyOrderRef::fromExternalId('order-1'),
+            new ShippingAddress('John Doe', '1 Rue du Commerce', 'Paris', '75001', 'FR'),
+            new ParcelSpec(1000, 'Order order-1'),
+            new \DateTimeImmutable(),
+        );
+    }
+}