Step 02 — Conformist (Invoicing)

- Ajout Symfony Messenger comme bus d'intégration - MessengerSalesEventPublisher remplace le NaivePublisher pour dispatch via Messenger - WhenOrderConfirmed (Invoicing) : consumer Conformist qui consomme sales.v1.OrderConfirmed tel quel - Tests de compatibilité Conformist et intégration - Configuration Messenger avec transport sync
Step 01 — Published Language
2026-03-04 00:31:08 +01:00 · 2026-03-04 00:29:51 +01:00
17 changed files with 812 additions and 22 deletions
--- a/apps/symfony/config/packages/messenger.yaml
+++ b/apps/symfony/config/packages/messenger.yaml
@@ -0,0 +1,11 @@
+framework:
+    messenger:
+        default_bus: messenger.bus.default
+        buses:
+            messenger.bus.default: ~
+        transports:
+            sync: 'sync://'
+        routing:
+            'MiniShop\Contracts\Sales\V1\Event\OrderConfirmed': sync
+            'MiniShop\Contracts\Sales\V1\Event\OrderPlaced': sync
+            'MiniShop\Contracts\Sales\V1\Event\OrderCancelled': sync
--- a/apps/symfony/config/services.yaml
+++ b/apps/symfony/config/services.yaml
@@ -25,7 +25,7 @@ services:
        alias: MiniShop\Sales\Infrastructure\Persistence\InMemoryOrderRepository

    MiniShop\Sales\Application\Port\SalesEventPublisher:
-        alias: MiniShop\Sales\Infrastructure\Messaging\NaiveSalesEventPublisher
+        alias: MiniShop\Sales\Infrastructure\Messaging\MessengerSalesEventPublisher

    # --- Invoicing ---
    MiniShop\Invoicing\Application\:
--- a/composer.json
+++ b/composer.json
@@ -5,9 +5,10 @@
    "license": "MIT",
    "require": {
        "php": ">=8.5",
-        "symfony/framework-bundle": "^7.2",
        "symfony/console": "^7.2",
        "symfony/dotenv": "^7.2",
+        "symfony/framework-bundle": "^7.2",
+        "symfony/messenger": "^7.2",
        "symfony/yaml": "^7.2"
    },
    "require-dev": {
@@ -19,7 +20,7 @@
            "MiniShop\\Invoicing\\": "src/Invoicing/",
            "MiniShop\\LegacyFulfillment\\": "src/LegacyFulfillment/",
            "MiniShop\\Shared\\": "src/Shared/",
-            "MiniShop\\Contracts\\": "contracts/",
+            "MiniShop\\Contracts\\Sales\\V1\\": "contracts/sales/v1/",
            "App\\": "apps/symfony/src/"
        }
    },
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
        "This file is @generated automatically"
    ],
-    "content-hash": "cf876267ce49272867204aaa70702ed4",
+    "content-hash": "1ad6323891b4f76eb1b6f55ff6741b32",
    "packages": [
        {
            "name": "psr/cache",
@@ -55,6 +55,54 @@
            },
            "time": "2021-02-03T23:26:27+00:00"
        },
+        {
+            "name": "psr/clock",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/clock.git",
+                "reference": "e41a24703d4560fd0acb709162f73b8adfc3aa0d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/clock/zipball/e41a24703d4560fd0acb709162f73b8adfc3aa0d",
+                "reference": "e41a24703d4560fd0acb709162f73b8adfc3aa0d",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Clock\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for reading the clock.",
+            "homepage": "https://github.com/php-fig/clock",
+            "keywords": [
+                "clock",
+                "now",
+                "psr",
+                "psr-20",
+                "time"
+            ],
+            "support": {
+                "issues": "https://github.com/php-fig/clock/issues",
+                "source": "https://github.com/php-fig/clock/tree/1.0.0"
+            },
+            "time": "2022-11-25T14:36:26+00:00"
+        },
        {
            "name": "psr/container",
            "version": "2.0.2",
@@ -384,6 +432,83 @@
            ],
            "time": "2025-03-13T15:25:07+00:00"
        },
+        {
+            "name": "symfony/clock",
+            "version": "v8.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/clock.git",
+                "reference": "832119f9b8dbc6c8e6f65f30c5969eca1e88764f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/clock/zipball/832119f9b8dbc6c8e6f65f30c5969eca1e88764f",
+                "reference": "832119f9b8dbc6c8e6f65f30c5969eca1e88764f",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.4",
+                "psr/clock": "^1.0"
+            },
+            "provide": {
+                "psr/clock-implementation": "1.0"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "Resources/now.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Component\\Clock\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Decouples applications from the system clock",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "clock",
+                "psr20",
+                "time"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/clock/tree/v8.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-11-12T15:46:48+00:00"
+        },
        {
            "name": "symfony/config",
            "version": "v8.0.6",
@@ -1508,6 +1633,100 @@
            ],
            "time": "2026-02-26T08:36:42+00:00"
        },
+        {
+            "name": "symfony/messenger",
+            "version": "v7.4.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/messenger.git",
+                "reference": "9da6166eb98937d903ed3685b317b426c82d3496"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/messenger/zipball/9da6166eb98937d903ed3685b317b426c82d3496",
+                "reference": "9da6166eb98937d903ed3685b317b426c82d3496",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.2",
+                "psr/log": "^1|^2|^3",
+                "symfony/clock": "^6.4|^7.0|^8.0",
+                "symfony/deprecation-contracts": "^2.5|^3"
+            },
+            "conflict": {
+                "symfony/console": "<7.2",
+                "symfony/event-dispatcher": "<6.4",
+                "symfony/event-dispatcher-contracts": "<2.5",
+                "symfony/framework-bundle": "<6.4",
+                "symfony/http-kernel": "<7.3",
+                "symfony/lock": "<7.4",
+                "symfony/serializer": "<6.4.32|>=7.3,<7.3.10|>=7.4,<7.4.4|>=8.0,<8.0.4"
+            },
+            "require-dev": {
+                "psr/cache": "^1.0|^2.0|^3.0",
+                "symfony/console": "^7.2|^8.0",
+                "symfony/dependency-injection": "^6.4|^7.0|^8.0",
+                "symfony/event-dispatcher": "^6.4|^7.0|^8.0",
+                "symfony/http-kernel": "^7.3|^8.0",
+                "symfony/lock": "^7.4|^8.0",
+                "symfony/process": "^6.4|^7.0|^8.0",
+                "symfony/property-access": "^6.4|^7.0|^8.0",
+                "symfony/rate-limiter": "^6.4|^7.0|^8.0",
+                "symfony/routing": "^6.4|^7.0|^8.0",
+                "symfony/serializer": "^6.4.32|~7.3.10|^7.4.4|^8.0.4",
+                "symfony/service-contracts": "^2.5|^3",
+                "symfony/stopwatch": "^6.4|^7.0|^8.0",
+                "symfony/validator": "^6.4|^7.0|^8.0",
+                "symfony/var-dumper": "^6.4|^7.0|^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Messenger\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Samuel Roze",
+                    "email": "samuel.roze@gmail.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Helps applications send and receive messages to/from other applications or via message queues",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/messenger/tree/v7.4.6"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2026-02-25T16:50:00+00:00"
+        },
        {
            "name": "symfony/polyfill-ctype",
            "version": "v1.33.0",
--- a/contracts/sales/v1/Api/OrderView.php
+++ b/contracts/sales/v1/Api/OrderView.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Contracts\Sales\V1\Api;
+
+/**
+ * Published Language — sales.v1.OrderView
+ * DTO de consultation. Contrat immutable et versionne.
+ */
+final readonly class OrderView
+{
+    /**
+     * @param list<array{productName: string, quantity: int, unitPriceInCents: int, currency: string, lineTotalInCents: int}> $lines
+     */
+    public function __construct(
+        public string $orderId,
+        public string $customerId,
+        public string $status,
+        public int $totalInCents,
+        public string $currency,
+        public array $lines,
+    ) {}
+}
--- a/contracts/sales/v1/Event/OrderCancelled.php
+++ b/contracts/sales/v1/Event/OrderCancelled.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Contracts\Sales\V1\Event;
+
+/**
+ * Published Language — sales.v1.OrderCancelled
+ * Contrat immutable et versionne. Ne jamais modifier les champs existants.
+ */
+final readonly class OrderCancelled
+{
+    public function __construct(
+        public string $orderId,
+    ) {}
+}
--- a/contracts/sales/v1/Event/OrderConfirmed.php
+++ b/contracts/sales/v1/Event/OrderConfirmed.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Contracts\Sales\V1\Event;
+
+/**
+ * Published Language — sales.v1.OrderConfirmed
+ * Contrat immutable et versionne. Ne jamais modifier les champs existants.
+ */
+final readonly class OrderConfirmed
+{
+    /**
+     * @param list<array{productName: string, quantity: int, unitPriceInCents: int, currency: string}> $lines
+     */
+    public function __construct(
+        public string $orderId,
+        public string $customerId,
+        public int $totalInCents,
+        public string $currency,
+        public array $lines,
+    ) {}
+}
--- a/contracts/sales/v1/Event/OrderPlaced.php
+++ b/contracts/sales/v1/Event/OrderPlaced.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Contracts\Sales\V1\Event;
+
+/**
+ * Published Language — sales.v1.OrderPlaced
+ * Contrat immutable et versionne. Ne jamais modifier les champs existants.
+ */
+final readonly class OrderPlaced
+{
+    /**
+     * @param list<array{productName: string, quantity: int, unitPriceInCents: int, currency: string}> $lines
+     */
+    public function __construct(
+        public string $orderId,
+        public string $customerId,
+        public int $totalInCents,
+        public string $currency,
+        public string $placedAt,
+        public array $lines,
+    ) {}
+}
--- a/src/Invoicing/Interfaces/Messaging/WhenOrderConfirmed.php
+++ b/src/Invoicing/Interfaces/Messaging/WhenOrderConfirmed.php
@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Invoicing\Interfaces\Messaging;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed;
+use MiniShop\Invoicing\Application\Command\IssueInvoiceForExternalOrder;
+use MiniShop\Invoicing\Application\Command\IssueInvoiceForExternalOrderHandler;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+/**
+ * Conformist : Invoicing consomme le contrat sales.v1.OrderConfirmed tel quel,
+ * sans traduction. La dependance upstream est explicite.
+ */
+#[AsMessageHandler]
+final readonly class WhenOrderConfirmed
+{
+    public function __construct(
+        private IssueInvoiceForExternalOrderHandler $handler,
+    ) {}
+
+    public function __invoke(OrderConfirmed $message): void
+    {
+        ($this->handler)(new IssueInvoiceForExternalOrder(
+            externalOrderId: $message->orderId,
+            customerName: 'Customer ' . $message->customerId,
+            customerAddress: 'N/A',
+            lines: array_map(
+                static fn (array $line): array => [
+                    'description' => $line['productName'],
+                    'quantity' => $line['quantity'],
+                    'unitPriceInCents' => $line['unitPriceInCents'],
+                    'currency' => $line['currency'],
+                ],
+                $message->lines,
+            ),
+        ));
+    }
+}
--- a/src/Sales/Infrastructure/Messaging/MessengerSalesEventPublisher.php
+++ b/src/Sales/Infrastructure/Messaging/MessengerSalesEventPublisher.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Sales\Infrastructure\Messaging;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderCancelled as OrderCancelledContract;
+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed as OrderConfirmedContract;
+use MiniShop\Contracts\Sales\V1\Event\OrderPlaced as OrderPlacedContract;
+use MiniShop\Sales\Application\Port\SalesEventPublisher;
+use MiniShop\Sales\Domain\Event\OrderCancelled;
+use MiniShop\Sales\Domain\Event\OrderConfirmed;
+use MiniShop\Sales\Domain\Event\OrderPlaced;
+use MiniShop\Sales\Domain\Model\OrderLine;
+use Symfony\Component\Messenger\MessageBusInterface;
+
+/**
+ * Publie les evenements de domaine Sales sous forme de contrats Published Language
+ * via Symfony Messenger. Remplace le NaiveSalesEventPublisher.
+ */
+final readonly class MessengerSalesEventPublisher implements SalesEventPublisher
+{
+    public function __construct(
+        private MessageBusInterface $messageBus,
+    ) {}
+
+    public function publishOrderPlaced(OrderPlaced $event): void
+    {
+        $this->messageBus->dispatch(new OrderPlacedContract(
+            orderId: $event->orderId->toString(),
+            customerId: $event->customerId->toString(),
+            totalInCents: $event->total->amount,
+            currency: $event->total->currency,
+            placedAt: $event->placedAt->format(\DateTimeInterface::ATOM),
+            lines: [],
+        ));
+    }
+
+    public function publishOrderConfirmed(OrderConfirmed $event): void
+    {
+        $this->messageBus->dispatch(new OrderConfirmedContract(
+            orderId: $event->orderId->toString(),
+            customerId: $event->customerId->toString(),
+            totalInCents: $event->total->amount,
+            currency: $event->total->currency,
+            lines: array_map(
+                static fn (OrderLine $line): array => [
+                    'productName' => $line->productName,
+                    'quantity' => $line->quantity,
+                    'unitPriceInCents' => $line->unitPrice->amount,
+                    'currency' => $line->unitPrice->currency,
+                ],
+                $event->lines,
+            ),
+        ));
+    }
+
+    public function publishOrderCancelled(OrderCancelled $event): void
+    {
+        $this->messageBus->dispatch(new OrderCancelledContract(
+            orderId: $event->orderId->toString(),
+        ));
+    }
+}
--- a/src/Sales/Infrastructure/Messaging/NaiveSalesEventPublisher.php
+++ b/src/Sales/Infrastructure/Messaging/NaiveSalesEventPublisher.php
@@ -4,6 +4,8 @@ declare(strict_types=1);

 namespace MiniShop\Sales\Infrastructure\Messaging;

+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed as OrderConfirmedContract;
+use MiniShop\Contracts\Sales\V1\Event\OrderPlaced as OrderPlacedContract;
 use MiniShop\Invoicing\Application\Command\IssueInvoiceForExternalOrder;
 use MiniShop\Invoicing\Application\Command\IssueInvoiceForExternalOrderHandler;
 use MiniShop\LegacyFulfillment\Application\Command\RequestShipmentFromSalesOrder;
@@ -16,7 +18,7 @@ use MiniShop\Sales\Domain\Model\OrderLine;

 /**
 * Couplage naif : Sales appelle directement les handlers des autres BC.
- * Ce couplage sera supprime dans les episodes suivants (Published Language, Conformist, ACL).
+ * Depuis step/01, la traduction passe par le Published Language (contracts/sales/v1).
 */
 final readonly class NaiveSalesEventPublisher implements SalesEventPublisher
 {
@@ -27,42 +29,78 @@ final readonly class NaiveSalesEventPublisher implements SalesEventPublisher

    public function publishOrderPlaced(OrderPlaced $event): void
    {
-        // Pas d'action downstream sur OrderPlaced dans le scenario naif.
+        // Traduction domaine → Published Language (pour reference)
+        new OrderPlacedContract(
+            orderId: $event->orderId->toString(),
+            customerId: $event->customerId->toString(),
+            totalInCents: $event->total->amount,
+            currency: $event->total->currency,
+            placedAt: $event->placedAt->format(\DateTimeInterface::ATOM),
+            lines: array_map(
+                static fn (OrderLine $line): array => [
+                    'productName' => $line->productName,
+                    'quantity' => $line->quantity,
+                    'unitPriceInCents' => $line->unitPrice->amount,
+                    'currency' => $line->unitPrice->currency,
+                ],
+                [], // OrderPlaced doesn't carry lines in this version
+            ),
+        );
+        // Pas d'action downstream sur OrderPlaced.
    }

    public function publishOrderConfirmed(OrderConfirmed $event): void
    {
-        // Appel direct vers Invoicing — couplage naif
-        ($this->issueInvoiceHandler)(new IssueInvoiceForExternalOrder(
-            externalOrderId: $event->orderId->toString(),
-            customerName: 'Customer ' . $event->customerId->toString(),
-            customerAddress: 'N/A',
-            lines: array_map(
+        $lines = array_map(
            static fn (OrderLine $line): array => [
-                    'description' => $line->productName,
+                'productName' => $line->productName,
                'quantity' => $line->quantity,
                'unitPriceInCents' => $line->unitPrice->amount,
                'currency' => $line->unitPrice->currency,
            ],
            $event->lines,
+        );
+
+        // Step 01 : traduction domaine → Published Language
+        $message = new OrderConfirmedContract(
+            orderId: $event->orderId->toString(),
+            customerId: $event->customerId->toString(),
+            totalInCents: $event->total->amount,
+            currency: $event->total->currency,
+            lines: $lines,
+        );
+
+        // Appel direct vers Invoicing — toujours naif mais via Published Language
+        ($this->issueInvoiceHandler)(new IssueInvoiceForExternalOrder(
+            externalOrderId: $message->orderId,
+            customerName: 'Customer ' . $message->customerId,
+            customerAddress: 'N/A',
+            lines: array_map(
+                static fn (array $line): array => [
+                    'description' => $line['productName'],
+                    'quantity' => $line['quantity'],
+                    'unitPriceInCents' => $line['unitPriceInCents'],
+                    'currency' => $line['currency'],
+                ],
+                $message->lines,
            ),
        ));

-        // Appel direct vers LegacyFulfillment — couplage naif
+        // Appel direct vers LegacyFulfillment — toujours naif mais via Published Language
        ($this->requestShipmentHandler)(new RequestShipmentFromSalesOrder(
-            externalOrderId: $event->orderId->toString(),
-            recipientName: 'Customer ' . $event->customerId->toString(),
+            externalOrderId: $message->orderId,
+            recipientName: 'Customer ' . $message->customerId,
            street: '1 Rue du Commerce',
            city: 'Paris',
            postalCode: '75001',
            country: 'FR',
            totalWeightInGrams: 1000,
-            description: sprintf('Order %s', $event->orderId->toString()),
+            description: sprintf('Order %s', $message->orderId),
        ));
    }

    public function publishOrderCancelled(OrderCancelled $event): void
    {
-        // Pas d'action downstream sur OrderCancelled dans le scenario naif.
+        // Pas d'action downstream sur OrderCancelled.
    }
 }
--- a/tests/Contract/.gitkeep
+++ b/tests/Contract/.gitkeep
--- a/tests/Contract/Sales/v1/ConformistCompatibilityTest.php
+++ b/tests/Contract/Sales/v1/ConformistCompatibilityTest.php
@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Tests\Contract\Sales\v1;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed;
+use MiniShop\Invoicing\Application\Command\IssueInvoiceForExternalOrder;
+use MiniShop\Invoicing\Application\Command\IssueInvoiceForExternalOrderHandler;
+use MiniShop\Invoicing\Infrastructure\Persistence\InMemoryInvoiceRepository;
+use MiniShop\Invoicing\Infrastructure\SequentialInvoiceNumberGenerator;
+use MiniShop\Invoicing\Interfaces\Messaging\WhenOrderConfirmed;
+use MiniShop\Shared\Technical\SystemClock;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test de compatibilite Conformist : Invoicing consomme sales.v1.OrderConfirmed
+ * tel quel, sans traduction. Toute evolution du schema upstream doit rester
+ * compatible avec ce consommateur.
+ */
+final class ConformistCompatibilityTest extends TestCase
+{
+    public function test_invoicing_can_consume_order_confirmed_v1(): void
+    {
+        $invoiceRepo = new InMemoryInvoiceRepository();
+        $handler = new IssueInvoiceForExternalOrderHandler(
+            $invoiceRepo,
+            new SequentialInvoiceNumberGenerator(),
+            new SystemClock(),
+        );
+        $consumer = new WhenOrderConfirmed($handler);
+
+        $message = new OrderConfirmed(
+            orderId: 'order-conformist-001',
+            customerId: 'cust-001',
+            totalInCents: 3000,
+            currency: 'EUR',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+            ],
+        );
+
+        $consumer($message);
+
+        $invoice = $invoiceRepo->findByExternalOrderId('order-conformist-001');
+        self::assertNotNull($invoice, 'Invoicing (Conformist) must be able to consume sales.v1.OrderConfirmed.');
+        self::assertSame('order-conformist-001', $invoice->externalOrderId);
+        self::assertCount(1, $invoice->lines());
+    }
+
+    public function test_schema_backward_compatible_with_extra_fields(): void
+    {
+        // Simule un schema upstream avec un champ supplementaire (retro-compatible)
+        $json = '{"orderId":"order-002","customerId":"cust-002","totalInCents":5000,"currency":"EUR","lines":[{"productName":"Gadget","quantity":1,"unitPriceInCents":5000,"currency":"EUR"}],"newField":"ignored"}';
+        $decoded = json_decode($json, true, flags: JSON_THROW_ON_ERROR);
+
+        $message = new OrderConfirmed(
+            orderId: $decoded['orderId'],
+            customerId: $decoded['customerId'],
+            totalInCents: $decoded['totalInCents'],
+            currency: $decoded['currency'],
+            lines: $decoded['lines'],
+        );
+
+        self::assertSame('order-002', $message->orderId);
+        self::assertSame(5000, $message->totalInCents);
+    }
+}
--- a/tests/Contract/Sales/v1/OrderConfirmedSchemaTest.php
+++ b/tests/Contract/Sales/v1/OrderConfirmedSchemaTest.php
@@ -0,0 +1,78 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Tests\Contract\Sales\v1;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Tests de stabilite du contrat sales.v1.OrderConfirmed.
+ */
+final class OrderConfirmedSchemaTest extends TestCase
+{
+    public function test_contract_has_required_fields(): void
+    {
+        $event = new OrderConfirmed(
+            orderId: 'order-001',
+            customerId: 'cust-001',
+            totalInCents: 5500,
+            currency: 'EUR',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+                ['productName' => 'Gadget', 'quantity' => 1, 'unitPriceInCents' => 2500, 'currency' => 'EUR'],
+            ],
+        );
+
+        self::assertSame('order-001', $event->orderId);
+        self::assertSame('cust-001', $event->customerId);
+        self::assertSame(5500, $event->totalInCents);
+        self::assertSame('EUR', $event->currency);
+        self::assertCount(2, $event->lines);
+    }
+
+    public function test_contract_serializes_to_stable_json(): void
+    {
+        $event = new OrderConfirmed(
+            orderId: 'order-001',
+            customerId: 'cust-001',
+            totalInCents: 5500,
+            currency: 'EUR',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+            ],
+        );
+
+        $json = json_encode($event, JSON_THROW_ON_ERROR);
+        $decoded = json_decode($json, true, flags: JSON_THROW_ON_ERROR);
+
+        self::assertArrayHasKey('orderId', $decoded);
+        self::assertArrayHasKey('customerId', $decoded);
+        self::assertArrayHasKey('totalInCents', $decoded);
+        self::assertArrayHasKey('currency', $decoded);
+        self::assertArrayHasKey('lines', $decoded);
+    }
+
+    public function test_lines_contain_required_fields(): void
+    {
+        $event = new OrderConfirmed(
+            orderId: 'order-001',
+            customerId: 'cust-001',
+            totalInCents: 3000,
+            currency: 'EUR',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+            ],
+        );
+
+        $json = json_encode($event, JSON_THROW_ON_ERROR);
+        $decoded = json_decode($json, true, flags: JSON_THROW_ON_ERROR);
+        $line = $decoded['lines'][0];
+
+        self::assertArrayHasKey('productName', $line);
+        self::assertArrayHasKey('quantity', $line);
+        self::assertArrayHasKey('unitPriceInCents', $line);
+        self::assertArrayHasKey('currency', $line);
+    }
+}
--- a/tests/Contract/Sales/v1/OrderPlacedSchemaTest.php
+++ b/tests/Contract/Sales/v1/OrderPlacedSchemaTest.php
@@ -0,0 +1,79 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Tests\Contract\Sales\v1;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderPlaced;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Tests de stabilite du contrat sales.v1.OrderPlaced.
+ * Garantit que le schema est stable et ne casse pas les consommateurs downstream.
+ */
+final class OrderPlacedSchemaTest extends TestCase
+{
+    public function test_contract_has_required_fields(): void
+    {
+        $event = new OrderPlaced(
+            orderId: 'order-001',
+            customerId: 'cust-001',
+            totalInCents: 3000,
+            currency: 'EUR',
+            placedAt: '2026-01-15T10:30:00+00:00',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+            ],
+        );
+
+        self::assertSame('order-001', $event->orderId);
+        self::assertSame('cust-001', $event->customerId);
+        self::assertSame(3000, $event->totalInCents);
+        self::assertSame('EUR', $event->currency);
+        self::assertSame('2026-01-15T10:30:00+00:00', $event->placedAt);
+        self::assertCount(1, $event->lines);
+    }
+
+    public function test_contract_serializes_to_stable_json(): void
+    {
+        $event = new OrderPlaced(
+            orderId: 'order-001',
+            customerId: 'cust-001',
+            totalInCents: 3000,
+            currency: 'EUR',
+            placedAt: '2026-01-15T10:30:00+00:00',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+            ],
+        );
+
+        $json = json_encode($event, JSON_THROW_ON_ERROR);
+        $decoded = json_decode($json, true, flags: JSON_THROW_ON_ERROR);
+
+        self::assertArrayHasKey('orderId', $decoded);
+        self::assertArrayHasKey('customerId', $decoded);
+        self::assertArrayHasKey('totalInCents', $decoded);
+        self::assertArrayHasKey('currency', $decoded);
+        self::assertArrayHasKey('placedAt', $decoded);
+        self::assertArrayHasKey('lines', $decoded);
+    }
+
+    public function test_contract_deserializes_from_json(): void
+    {
+        $json = '{"orderId":"order-001","customerId":"cust-001","totalInCents":3000,"currency":"EUR","placedAt":"2026-01-15T10:30:00+00:00","lines":[{"productName":"Widget","quantity":2,"unitPriceInCents":1500,"currency":"EUR"}]}';
+
+        $decoded = json_decode($json, true, flags: JSON_THROW_ON_ERROR);
+
+        $event = new OrderPlaced(
+            orderId: $decoded['orderId'],
+            customerId: $decoded['customerId'],
+            totalInCents: $decoded['totalInCents'],
+            currency: $decoded['currency'],
+            placedAt: $decoded['placedAt'],
+            lines: $decoded['lines'],
+        );
+
+        self::assertSame('order-001', $event->orderId);
+        self::assertSame(3000, $event->totalInCents);
+    }
+}
--- a/tests/Contract/Sales/v1/OrderViewSchemaTest.php
+++ b/tests/Contract/Sales/v1/OrderViewSchemaTest.php
@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Tests\Contract\Sales\v1;
+
+use MiniShop\Contracts\Sales\V1\Api\OrderView;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Tests de stabilite du contrat sales.v1.OrderView.
+ */
+final class OrderViewSchemaTest extends TestCase
+{
+    public function test_contract_has_required_fields(): void
+    {
+        $view = new OrderView(
+            orderId: 'order-001',
+            customerId: 'cust-001',
+            status: 'confirmed',
+            totalInCents: 5500,
+            currency: 'EUR',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR', 'lineTotalInCents' => 3000],
+            ],
+        );
+
+        self::assertSame('order-001', $view->orderId);
+        self::assertSame('confirmed', $view->status);
+        self::assertSame(5500, $view->totalInCents);
+        self::assertCount(1, $view->lines);
+    }
+
+    public function test_contract_serializes_to_stable_json(): void
+    {
+        $view = new OrderView(
+            orderId: 'order-001',
+            customerId: 'cust-001',
+            status: 'placed',
+            totalInCents: 3000,
+            currency: 'EUR',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR', 'lineTotalInCents' => 3000],
+            ],
+        );
+
+        $json = json_encode($view, JSON_THROW_ON_ERROR);
+        $decoded = json_decode($json, true, flags: JSON_THROW_ON_ERROR);
+
+        self::assertArrayHasKey('orderId', $decoded);
+        self::assertArrayHasKey('customerId', $decoded);
+        self::assertArrayHasKey('status', $decoded);
+        self::assertArrayHasKey('totalInCents', $decoded);
+        self::assertArrayHasKey('currency', $decoded);
+        self::assertArrayHasKey('lines', $decoded);
+    }
+}
--- a/tests/Integration/InvoicingConformistTest.php
+++ b/tests/Integration/InvoicingConformistTest.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Tests\Integration;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed;
+use MiniShop\Invoicing\Infrastructure\Persistence\InMemoryInvoiceRepository;
+use MiniShop\Invoicing\Infrastructure\SequentialInvoiceNumberGenerator;
+use MiniShop\Invoicing\Interfaces\Messaging\WhenOrderConfirmed;
+use MiniShop\Invoicing\Application\Command\IssueInvoiceForExternalOrderHandler;
+use MiniShop\Shared\Technical\SystemClock;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test d'integration : le consumer Conformist d'Invoicing recoit un message
+ * sales.v1.OrderConfirmed et cree une facture sans traduction.
+ */
+final class InvoicingConformistTest extends TestCase
+{
+    public function test_invoicing_creates_invoice_on_order_confirmed(): void
+    {
+        $invoiceRepo = new InMemoryInvoiceRepository();
+        $consumer = new WhenOrderConfirmed(
+            new IssueInvoiceForExternalOrderHandler(
+                $invoiceRepo,
+                new SequentialInvoiceNumberGenerator(),
+                new SystemClock(),
+            ),
+        );
+
+        $consumer(new OrderConfirmed(
+            orderId: 'order-int-001',
+            customerId: 'cust-001',
+            totalInCents: 4500,
+            currency: 'EUR',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+                ['productName' => 'Gadget', 'quantity' => 1, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+            ],
+        ));
+
+        $invoice = $invoiceRepo->findByExternalOrderId('order-int-001');
+        self::assertNotNull($invoice);
+        self::assertCount(2, $invoice->lines());
+        self::assertSame('INV-000001', $invoice->invoiceNumber);
+    }
+}