diff --git a/package.json b/package.json
index b916c8f..0ba5b53 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,8 @@
     "build:linux-x64": "electron-builder --linux --x64",
     "build:linux-arm64": "electron-builder --linux --arm64",
     "dist": "electron-builder",
-    "postinstall": "electron-builder install-app-deps"
+    "postinstall": "electron-builder install-app-deps",
+    "test": "bun test"
   },
   "keywords": [
     "electron",
diff --git a/socketio-adapter.js b/socketio-adapter.js
index 2ff8015..792b9aa 100644
--- a/socketio-adapter.js
+++ b/socketio-adapter.js
@@ -8,11 +8,28 @@
 const io = require('socket.io-client');
 
 class SocketIOAdapter {
-  constructor(serverUrl) {
+  constructor(serverUrl, socketFactory = null) {
     this.serverUrl = serverUrl;
+    this._socketFactory = socketFactory || io;
     this.socket = null;
-    this._state = 'disconnected'; // disconnected, connecting, connected, error
+    this._state = 'disconnected'; // disconnected, connecting, connected, reconnecting, error
     this._eventHandlers = new Map();
+    this._onStateChange = null; // callback pour notifier main.js des changements d'etat
+  }
+
+  /**
+   * Enregistrer un callback de changement d'etat.
+   * @param {function(string)} callback - recoit le nouvel etat
+   */
+  onStateChange(callback) {
+    this._onStateChange = callback;
+  }
+
+  _setState(state) {
+    this._state = state;
+    if (this._onStateChange) {
+      this._onStateChange(state);
+    }
   }
 
   /**
@@ -22,9 +39,9 @@ class SocketIOAdapter {
    */
   connect(accessCode, password, terminal) {
     return new Promise((resolve, reject) => {
-      this._state = 'connecting';
+      this._setState('connecting');
 
-      this.socket = io(this.serverUrl, {
+      this.socket = this._socketFactory(this.serverUrl, {
         auth: { access_code: accessCode, password, terminal },
         transports: ['websocket'],
         reconnection: true,
@@ -39,7 +56,7 @@ class SocketIOAdapter {
       this.socket.once('login_ok', (data) => {
         if (settled) return;
         settled = true;
-        this._state = 'connected';
+        this._setState('connected');
         resolve(data);
       });
 
@@ -47,7 +64,7 @@ class SocketIOAdapter {
       this.socket.once('login_error', (data) => {
         if (settled) return;
         settled = true;
-        this._state = 'error';
+        this._setState('error');
         this.socket.disconnect();
         reject(new Error(data.message || 'Authentification refusee'));
       });
@@ -56,23 +73,41 @@ class SocketIOAdapter {
       this.socket.on('connect_error', (err) => {
         if (!settled) {
           settled = true;
-          this._state = 'error';
+          this._setState('error');
           this.socket.disconnect();
           reject(new Error(err.message || 'Connexion refusee'));
         }
-        // Apres login reussi : reconnexion auto geree par socket.io
+        // Apres login reussi : reconnexion auto, on passe en 'reconnecting'
       });
 
       // Timeout de connexion initiale (15s)
       setTimeout(() => {
         if (!settled) {
           settled = true;
-          this._state = 'error';
+          this._setState('error');
           this.socket.disconnect();
           reject(new Error('Timeout de connexion au serveur'));
         }
       }, 15000);
 
+      // === Handlers de reconnexion (actifs apres le premier login) ===
+
+      // Deconnexion temporaire → passer en 'reconnecting'
+      this.socket.on('disconnect', (reason) => {
+        if (this._state === 'connected') {
+          // Deconnexion temporaire, socket.io va retenter
+          this._setState('reconnecting');
+        }
+      });
+
+      // Reconnexion reussie → le serveur recoit un nouveau connect avec les memes auth
+      // et emet 'login_ok' (reprise de session)
+      this.socket.on('login_ok', (data) => {
+        if (settled && this._state === 'reconnecting') {
+          this._setState('connected');
+        }
+      });
+
       // Restaurer les handlers enregistres avant connect
       this._eventHandlers.forEach((handler, event) => {
         this.socket.on(event, handler);
@@ -87,13 +122,13 @@ class SocketIOAdapter {
   logoff() {
     return new Promise((resolve) => {
       if (!this.socket || !this.socket.connected) {
-        this._state = 'disconnected';
+        this._setState('disconnected');
         resolve();
         return;
       }
 
       this.socket.once('logout_ok', () => {
-        this._state = 'disconnected';
+        this._setState('disconnected');
         resolve();
       });
 
@@ -104,7 +139,7 @@ class SocketIOAdapter {
         if (this.socket) {
           this.socket.disconnect();
         }
-        this._state = 'disconnected';
+        this._setState('disconnected');
         resolve();
       }, 5000);
     });
@@ -117,7 +152,7 @@ class SocketIOAdapter {
     if (this.socket) {
       this.socket.disconnect();
     }
-    this._state = 'disconnected';
+    this._setState('disconnected');
   }
 
   /**
diff --git a/socketio-adapter.test.js b/socketio-adapter.test.js
new file mode 100644
index 0000000..9838eb1
--- /dev/null
+++ b/socketio-adapter.test.js
@@ -0,0 +1,131 @@
+import { describe, test, expect, mock, beforeEach } from "bun:test";
+
+const SocketIOAdapter = require("./socketio-adapter.js");
+
+// EventEmitter minimal pour simuler un socket.io
+function createFakeSocket() {
+  const listeners = {};
+
+  const socket = {
+    on(event, fn) { (listeners[event] ??= []).push(fn); },
+    once(event, fn) {
+      const wrapper = (...args) => {
+        socket.off(event, wrapper);
+        fn(...args);
+      };
+      (listeners[event] ??= []).push(wrapper);
+    },
+    off(event, fn) {
+      if (fn) {
+        listeners[event] = (listeners[event] || []).filter(f => f !== fn);
+      } else {
+        delete listeners[event];
+      }
+    },
+    emit: mock(() => {}),
+    disconnect: mock(() => {}),
+    connected: true,
+
+    // Helper test : déclencher un event côté "serveur"
+    _fire(event, ...args) {
+      (listeners[event] || []).slice().forEach(fn => fn(...args));
+    },
+  };
+  return socket;
+}
+
+describe("SocketIOAdapter", () => {
+  let adapter, socket;
+
+  beforeEach(() => {
+    socket = null;
+    const factory = (url, opts) => {
+      socket = createFakeSocket();
+      return socket;
+    };
+    adapter = new SocketIOAdapter("http://localhost:8004", factory);
+  });
+
+  test("état initial = disconnected", () => {
+    expect(adapter.state).toBe("disconnected");
+  });
+
+  test("connect() passe en connecting puis connected sur login_ok", async () => {
+    const states = [];
+    adapter.onStateChange((s) => states.push(s));
+
+    const p = adapter.connect("1234", "pass", "2001");
+    socket._fire("login_ok", { accessCode: "1234", firstName: "Test", lastName: "User", connList: [] });
+
+    const result = await p;
+
+    expect(states).toEqual(["connecting", "connected"]);
+    expect(adapter.state).toBe("connected");
+    expect(result.accessCode).toBe("1234");
+  });
+
+  test("connect() rejette sur login_error", async () => {
+    const p = adapter.connect("1234", "wrong", "2001");
+    socket._fire("login_error", { message: "Mot de passe incorrect" });
+
+    expect(p).rejects.toThrow("Mot de passe incorrect");
+    expect(adapter.state).toBe("error");
+  });
+
+  test("connect() rejette sur connect_error", async () => {
+    const p = adapter.connect("1234", "pass", "2001");
+    socket._fire("connect_error", new Error("Connection refused"));
+
+    expect(p).rejects.toThrow("Connection refused");
+    expect(adapter.state).toBe("error");
+  });
+
+  test("déconnexion temporaire passe en reconnecting", async () => {
+    const p = adapter.connect("1234", "pass", "2001");
+    socket._fire("login_ok", { accessCode: "1234" });
+    await p;
+
+    socket._fire("disconnect", "transport close");
+
+    expect(adapter.state).toBe("reconnecting");
+  });
+
+  test("reconnexion après déconnexion repasse en connected", async () => {
+    const p = adapter.connect("1234", "pass", "2001");
+    socket._fire("login_ok", { accessCode: "1234" });
+    await p;
+
+    socket._fire("disconnect", "transport close");
+    expect(adapter.state).toBe("reconnecting");
+
+    socket._fire("login_ok", { accessCode: "1234" });
+    expect(adapter.state).toBe("connected");
+  });
+
+  test("logoff() émet logout et passe en disconnected sur logout_ok", async () => {
+    const p = adapter.connect("1234", "pass", "2001");
+    socket._fire("login_ok", { accessCode: "1234" });
+    await p;
+
+    const logoffP = adapter.logoff();
+    socket._fire("logout_ok");
+    await logoffP;
+
+    expect(socket.emit).toHaveBeenCalledWith("logout");
+    expect(adapter.state).toBe("disconnected");
+  });
+
+  test("onStateChange est appelé à chaque transition", async () => {
+    const states = [];
+    adapter.onStateChange((s) => states.push(s));
+
+    const p = adapter.connect("1234", "pass", "2001");
+    socket._fire("login_ok", { accessCode: "1234" });
+    await p;
+
+    socket._fire("disconnect", "transport close");
+    socket._fire("login_ok", { accessCode: "1234" });
+
+    expect(states).toEqual(["connecting", "connected", "reconnecting", "connected"]);
+  });
+});