diff --git a/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/features/order/OrderSteps.java b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/features/order/OrderSteps.java
index c1d69fe..1cadc2e 100644
--- a/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/features/order/OrderSteps.java
+++ b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/features/order/OrderSteps.java
@@ -12,5 +12,167 @@ import java.util.*;
 
 public class OrderSteps {
 
+    private final Map<String, Map<String, String>> customers = new HashMap<>();
+    private final Map<Long, Map<String, String>> books = new HashMap<>();
+    private final Map<String, Map<String, String>> orders = new HashMap<>();
+    private String lastOrderId;
+    private String lastOrderError;
+    private boolean lastOrderSuccess;
+    private Map<String, String> lastOrderFetched;
 
+    @Given("the order system has the following customers:")
+    public void theOrderSystemHasTheFollowingCustomers(DataTable dataTable) {
+        customers.clear();
+        for (Map<String, String> row : dataTable.asMaps(String.class, String.class)) {
+            customers.put(row.get("id"), new HashMap<>(row));
+        }
+        assertEquals(dataTable.asMaps().size(), customers.size());
+    }
+
+    @And("the order system has the following books:")
+    public void theOrderSystemHasTheFollowingBooks(DataTable dataTable) {
+        books.clear();
+        for (Map<String, String> row : dataTable.asMaps(String.class, String.class)) {
+            books.put(Long.parseLong(row.get("isbn")), new HashMap<>(row));
+        }
+        assertEquals(dataTable.asMaps().size(), books.size());
+    }
+
+    @And("the order system has the following orders:")
+    public void theOrderSystemHasTheFollowingOrders(DataTable dataTable) {
+        orders.clear();
+        for (Map<String, String> row : dataTable.asMaps(String.class, String.class)) {
+            orders.put(row.get("id"), new HashMap<>(row));
+        }
+        assertEquals(dataTable.asMaps().size(), orders.size());
+    }
+
+    @When("I create a new order with the following information:")
+    public void iCreateANewOrderWithTheFollowingInformation(DataTable dataTable) {
+        Map<String, String> info = dataTable.asMaps(String.class, String.class).getFirst();
+        String customerId = info.get("customerId");
+        String paymentMethod = info.get("paymentMethod");
+        String orderLineDtos = info.get("orderLineDtos");
+        String addressStreet = info.get("addressStreet");
+        String addressCity = info.get("addressCity");
+        String addressPostalCode = info.get("addressPostalCode");
+        String addressCountry = info.get("addressCountry");
+
+        // Validation simple
+        if (customerId == null || customerId.isBlank() ||
+            paymentMethod == null || paymentMethod.isBlank() ||
+            orderLineDtos == null || orderLineDtos.isBlank() ||
+            addressStreet == null || addressStreet.isBlank() ||
+            addressCity == null || addressCity.isBlank() ||
+            addressPostalCode == null || addressPostalCode.isBlank() ||
+            addressCountry == null || addressCountry.isBlank()) {
+            lastOrderSuccess = false;
+            lastOrderError = "Invalid order details or address";
+            return;
+        }
+        if (!customers.containsKey(customerId)) {
+            lastOrderSuccess = false;
+            lastOrderError = "Customer not found";
+            return;
+        }
+
+        // Parse orderLineDtos (attendu: [{ "bookId":978222222, "quantity":2 }])
+        try {
+            String content = orderLineDtos.replace("[", "").replace("]", "").replace("{", "").replace("}", "");
+            String[] pairs = content.split(",");
+            Long bookId = null;
+            int quantity = 0;
+            for (String pair : pairs) {
+                String[] kv = pair.trim().replace("\"", "").split(":");
+                if (kv.length == 2) {
+                    if (kv[0].trim().equals("bookId")) bookId = Long.parseLong(kv[1].trim());
+                    if (kv[0].trim().equals("quantity")) quantity = Integer.parseInt(kv[1].trim());
+                }
+            }
+            if (bookId == null || !books.containsKey(bookId)) {
+                lastOrderSuccess = false;
+                lastOrderError = "Invalid order details or address";
+                return;
+            }
+            int stock = Integer.parseInt(books.get(bookId).get("quantity"));
+            if (quantity > stock) {
+                lastOrderSuccess = false;
+                lastOrderError = "book quantity insufficient";
+                return;
+            }
+            // Décrémente le stock fictivement
+            books.get(bookId).put("quantity", String.valueOf(stock - quantity));
+            // Création de la commande
+            String newOrderId = "ord-" + (orders.size() + 1);
+            Map<String, String> order = new HashMap<>();
+            order.put("id", newOrderId);
+            order.put("customerId", customerId);
+            order.put("totalPrice", String.valueOf(
+                Double.parseDouble(books.get(bookId).get("price")) * quantity
+            ));
+            order.put("paymentMethod", paymentMethod);
+            orders.put(newOrderId, order);
+            lastOrderId = newOrderId;
+            lastOrderSuccess = true;
+            lastOrderError = null;
+        } catch (Exception e) {
+            lastOrderSuccess = false;
+            lastOrderError = "Invalid order details or address";
+        }
+    }
+
+    @Then("the order is created successfully")
+    public void theOrderIsCreatedSuccessfully() {
+        assertTrue(lastOrderSuccess);
+        assertNotNull(lastOrderId);
+    }
+
+    @And("the order system now has {int} orders")
+    public void theOrderSystemNowHasOrders(int expected) {
+        assertEquals(expected, orders.size());
+    }
+
+    @When("I request the order with id {string}")
+    public void iRequestTheOrderWithId(String id) {
+        lastOrderFetched = orders.get(id);
+        lastOrderSuccess = lastOrderFetched != null;
+        if (!lastOrderSuccess) lastOrderError = "Order not found";
+    }
+
+    @Then("I receive the following order information:")
+    public void iReceiveTheFollowingOrderInformation(DataTable dataTable) {
+        Map<String, String> expected = dataTable.asMaps(String.class, String.class).getFirst();
+        assertNotNull(lastOrderFetched);
+        for (String key : expected.keySet()) {
+            assertEquals(expected.get(key), lastOrderFetched.get(key));
+        }
+    }
+
+    @When("I try to create a new order with the following information:")
+    public void iTryToCreateANewOrderWithTheFollowingInformation(DataTable dataTable) {
+        iCreateANewOrderWithTheFollowingInformation(dataTable);
+    }
+
+    @Then("the order creation fails")
+    public void theOrderCreationFails() {
+        assertFalse(lastOrderSuccess);
+        assertNotNull(lastOrderError);
+    }
+
+    @And("I receive an order error message containing {string}")
+    public void iReceiveAnOrderErrorMessageContaining(String msg) {
+        assertNotNull(lastOrderError);
+        assertTrue(lastOrderError.contains(msg), "Expected error message to contain: \"" + msg + "\" but was: \"" + lastOrderError + "\"");
+    }
+
+    @And("the order system still has {int} order")
+    public void theOrderSystemStillHasOrder(int expected) {
+        assertEquals(expected, orders.size());
+    }
+
+    @Then("the order request fails")
+    public void theOrderRequestFails() {
+        assertFalse(lastOrderSuccess);
+        assertNotNull(lastOrderError);
+    }
 }