ajout du scenario cucumber et du README

ajout du usecase pour les livres + tests
ajout du repository en memoire + tests
2026-06-14 15:22:36 +02:00 · 2026-06-14 15:22:29 +02:00 · 2026-06-12 23:32:35 +02:00 · 2026-06-12 23:32:26 +02:00 · 2026-06-12 23:32:17 +02:00 · 2026-06-12 23:30:58 +02:00
62 changed files with 3300 additions and 627 deletions
@@ -12,6 +12,7 @@
        "@testing-library/jest-dom": "^6.9.1",
        "@testing-library/react": "^16.3.2",
        "@testing-library/user-event": "^13.5.0",
+        "axios": "^1.17.0",
        "react": "^19.2.4",
        "react-dom": "^19.2.4",
        "react-router-dom": "^7.13.1",
@@ -4804,6 +4805,34 @@
        "node": ">=4"
      }
    },
+    "node_modules/axios": {
+      "version": "1.17.0",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-1.17.0.tgz",
+      "integrity": "sha512-J8SwNxprqqpbfenehxWYXE7CW+wM1BB4w3+N+g+/Wx40xM4rsLrfPmHHxSWIxJLYDgSY/HqlFPIYb2/S3rxafw==",
+      "license": "MIT",
+      "dependencies": {
+        "follow-redirects": "^1.16.0",
+        "form-data": "^4.0.5",
+        "https-proxy-agent": "^5.0.1",
+        "proxy-from-env": "^2.1.0"
+      }
+    },
+    "node_modules/axios/node_modules/form-data": {
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.5.tgz",
+      "integrity": "sha512-8RipRLol37bNs2bhoV67fiTEvdTrbMUYcFTiy3+wuuOnUog2QBHCZWXDRijWQfAkhBj2Uf5UnVaiWwA5vdd82w==",
+      "license": "MIT",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "es-set-tostringtag": "^2.1.0",
+        "hasown": "^2.0.2",
+        "mime-types": "^2.1.12"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
    "node_modules/axobject-query": {
      "version": "4.1.0",
      "resolved": "https://registry.npmjs.org/axobject-query/-/axobject-query-4.1.0.tgz",
@@ -8090,9 +8119,9 @@
      "license": "ISC"
    },
    "node_modules/follow-redirects": {
-      "version": "1.15.11",
-      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.11.tgz",
-      "integrity": "sha512-deG2P0JfjrTxl50XGCDyfI97ZGVCxIpfKYmfyrQ54n5FO/0gfIES8C/Psl6kWVDolizcaaxZJnTS0QSMxvnsBQ==",
+      "version": "1.16.0",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.16.0.tgz",
+      "integrity": "sha512-y5rN/uOsadFT/JfYwhxRS5R7Qce+g3zG97+JrtFZlC9klX/W5hD7iiLzScI4nZqUS7DNUdhPgw4xI8W2LuXlUw==",
      "funding": [
        {
          "type": "individual",
@@ -13456,6 +13485,15 @@
        "node": ">= 0.10"
      }
    },
+    "node_modules/proxy-from-env": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-2.1.0.tgz",
+      "integrity": "sha512-cJ+oHTW1VAEa8cJslgmUZrc+sjRKgAKl3Zyse6+PV38hZe/V6Z14TbCuXcan9F9ghlz4QrFr2c92TNF82UkYHA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      }
+    },
    "node_modules/psl": {
      "version": "1.15.0",
      "resolved": "https://registry.npmjs.org/psl/-/psl-1.15.0.tgz",
@@ -7,6 +7,7 @@
    "@testing-library/jest-dom": "^6.9.1",
    "@testing-library/react": "^16.3.2",
    "@testing-library/user-event": "^13.5.0",
+    "axios": "^1.17.0",
    "react": "^19.2.4",
    "react-dom": "^19.2.4",
    "react-router-dom": "^7.13.1",
@@ -1,14 +1,21 @@
 import { Routes, Route } from 'react-router-dom';
-import Navbar from './components/Navbar';
+import Layout from './components/Layout';
 import Home from './pages/Home';
+import Books from './pages/Books';
+import Orders from './pages/Orders';
+import Profile from './pages/Profile';
+import NotFound from './pages/NotFound';

 export default function App() {
  return (
-    <>
-      <Navbar />
-      <Routes>
-        <Route path="/" element={<Home />} />
-      </Routes>
-    </>
+    <Routes>
+      <Route path="/" element={<Layout />}>
+        <Route index element={<Home />} />
+        <Route path="books" element={<Books />} />
+        <Route path="orders" element={<Orders />} />
+        <Route path="profile" element={<Profile />} />
+        <Route path="*" element={<NotFound />} />
+      </Route>
+    </Routes>
  );
 }
@@ -0,0 +1,5 @@
+import client from './client';
+
+export function getBooks(page = 0, size = 20) {
+  return client.get('/api/books', { params: { page, size } });
+}
@@ -0,0 +1,7 @@
+import axios from 'axios';
+
+const client = axios.create({
+  baseURL: 'http://localhost:8080',
+});
+
+export default client;
@@ -0,0 +1,11 @@
+import { Outlet } from 'react-router-dom';
+import Navbar from './Navbar';
+
+export default function Layout() {
+  return (
+    <>
+      <Navbar />
+      <Outlet />
+    </>
+  );
+}
@@ -1,13 +0,0 @@
-body {
-  margin: 0;
-  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
-    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
-    sans-serif;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-code {
-  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
-    monospace;
-}
@@ -0,0 +1,39 @@
+import { useState, useEffect } from 'react';
+import { getBooks } from '../api/books';
+
+export default function Books() {
+  const [books, setBooks] = useState([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState(null);
+
+  useEffect(() => {
+    getBooks()
+      .then((response) => {
+        console.log(response.data); 
+        setBooks(response.data.content);
+      })
+      .catch((err) => {
+        console.error(err);
+        setError("Impossible de charger les livres.");
+      })
+      .finally(() => {
+        setLoading(false);
+      });
+  }, []);
+
+  if (loading) return <main><p>Chargement…</p></main>;
+  if (error) return <main><p>{error}</p></main>;
+
+  return (
+    <main>
+      <h1>Catalogue</h1>
+      <ul>
+        {books.map((book) => (
+          <li key={book.isbn}>
+            <strong>{book.title}</strong> - {book.author}
+          </li>
+        ))}
+      </ul>
+    </main>
+  );
+}
@@ -1,91 +1,9 @@
 import { Link } from 'react-router-dom';
 import '../styles/home.css';

-const features = [
-  { icon: '📚', title: 'Enregistrer un livre',   desc: 'Ajoutez un nouveau titre au catalogue de la bibliothèque.', role: 'admin', path: '/books/new' },
-  { icon: '🛒', title: 'Passer une commande',     desc: 'Commandez vos livres préférés en quelques secondes.',       role: 'user',  path: '/orders/new' },
-  { icon: '🏷️', title: 'Appliquer une promotion', desc: 'Créez et gérez vos codes promotionnels.',                   role: 'admin', path: '/promotions/new' },
-  { icon: '📌', title: 'Réserver un livre',        desc: 'Réservez un exemplaire avant sa disponibilité.',            role: 'user',  path: '/reservations/new' },
-  { icon: '↩️', title: 'Retour de livre',          desc: 'Gérez les retours et remises en stock.',                   role: 'admin', path: '/returns/new' },
-  { icon: '⭐', title: 'Points de fidélité',       desc: 'Consultez et utilisez vos points cumulés.',                role: 'user',  path: '/loyalty' },
-  { icon: '💬', title: 'Laisser un avis',          desc: 'Partagez votre opinion sur vos dernières lectures.',        role: 'user',  path: '/reviews/new' },
-  { icon: '🎫', title: 'Créer un abonnement',      desc: 'Souscrivez à un abonnement mensuel ou annuel.',            role: 'user',  path: '/subscriptions/new' },
-  { icon: '🤝', title: 'Prêt entre lecteurs',      desc: "Prêtez vos livres à d'autres membres de la communauté.",   role: 'user',  path: '/loans/new' },
-  { icon: '👥', title: 'Commande groupée',         desc: 'Participez à des achats groupés avantageux.',              role: 'user',  path: '/group-orders' },
-];
-
-const stats = [
-  { value: '10 000+', label: 'Livres disponibles' },
-  { value: '5 000+',  label: 'Lecteurs actifs'    },
-  { value: '50+',     label: 'Catégories'         },
-];
-
 export default function Home() {
  return (
    <main>
-      {/* Hero */}
-      <section className="hero">
-        <p className="hero__eyebrow">Votre bibliothèque en ligne</p>
-        <h1 className="hero__title">
-          Des livres pour tous,
-          <span className="hero__title-italic">partout, toujours.</span>
-        </h1>
-        <div className="hero__rule" />
-        <p className="hero__subtitle">
-          Commandez, réservez, prêtez et partagez vos lectures.
-          Une plateforme pensée pour les vrais amoureux des livres.
-        </p>
-        <div className="hero__actions">
-          <Link to="/books">
-            <button className="hero__btn-primary">Explorer le catalogue</button>
-          </Link>
-          <button className="hero__btn-secondary">En savoir plus</button>
-        </div>
-      </section>
-
-      {/* Stats */}
-      <section className="stats">
-        {stats.map(({ value, label }) => (
-          <div key={label} className="stats__item">
-            <div className="stats__value">{value}</div>
-            <div className="stats__label">{label}</div>
-          </div>
-        ))}
-      </section>
-
-      {/* Features */}
-      <div className="section-header">
-        <p className="section-header__eyebrow">Fonctionnalités</p>
-        <h2 className="section-header__title">Tout ce dont vous avez besoin</h2>
-      </div>
-
-      <section className="features">
-        <div className="features__grid">
-          {features.map((f) => (
-            <Link to={f.path} key={f.title} className="feature-card">
-              <div className="feature-card__glyph">{f.icon}</div>
-              <span className={`badge badge--${f.role}`}>
-                {f.role === 'admin' ? 'Administrateur' : 'Utilisateur'}
-              </span>
-              <h3 className="feature-card__title">{f.title}</h3>
-              <p className="feature-card__desc">{f.desc}</p>
-              <span className="feature-card__arrow">→ Accéder</span>
-            </Link>
-          ))}
-        </div>
-      </section>
-
-      {/* Footer CTA */}
-      <section className="home-cta">
-        <div className="home-cta__rule" />
-        <h2 className="home-cta__title">
-          Prêt à commencer<br />votre aventure ?
-        </h2>
-        <p className="home-cta__sub">Rejoignez des milliers de lecteurs dès aujourd'hui.</p>
-        <Link to="/register">
-          <span className="home-cta__btn">Créer un compte gratuit</span>
-        </Link>
-      </section>
    </main>
  );
 }
@@ -0,0 +1,3 @@
+export default function NotFound() {
+  return <main><h1>404 Page introuvable</h1></main>;
+}
@@ -0,0 +1,3 @@
+export default function Orders() {
+  return <main><h1>Mes commandes</h1></main>;
+}
@@ -0,0 +1,3 @@
+export default function Profile() {
+  return <main><h1>Mon compte</h1></main>;
+}
@@ -1,52 +0,0 @@
-*, *::before, *::after {
-    box-sizing: border-box;
-    margin: 0;
-    padding: 0;
-  }
-  
-  :root {
-    --bg:        #0d0b08;
-    --bg-raised: #111009;
-    --bg-card:   #0f0d0a;
-    --gold:      #c9a84c;
-    --gold-dim:  rgba(201, 168, 76, 0.45);
-    --gold-faint:rgba(201, 168, 76, 0.1);
-    --parchment: #f0e6d0;
-    --text:      #e8dcc8;
-    --text-muted:rgba(232, 220, 200, 0.45);
-    --text-dim:  rgba(232, 220, 200, 0.25);
-    --rust:      #c05a2a;
-    --rust-dim:  rgba(192, 90, 42, 0.4);
-    --border:    rgba(180, 150, 80, 0.15);
-    --border-hi: rgba(180, 150, 80, 0.3);
-    --font-title:'Cinzel', 'Palatino Linotype', Georgia, serif;
-    --font-body: 'Cormorant Garamond', 'Palatino Linotype', Georgia, serif;
-  }
-  
-  html { scroll-behavior: smooth; }
-  
-  body {
-    background-color: var(--bg);
-    color: var(--text);
-    font-family: var(--font-body);
-    font-size: 18px;
-    line-height: 1.7;
-    -webkit-font-smoothing: antialiased;
-  }
-  
-  h1, h2, h3, h4 {
-    font-family: var(--font-title);
-  }
-  
-  a {
-    color: inherit;
-    text-decoration: none;
-  }
-  
-  button {
-    cursor: pointer;
-    font-family: var(--font-title);
-    border: none;
-    outline: none;
-    background: none;
-  }
@@ -1,372 +0,0 @@
-/* ── Hero ───────────────────────────── */
-.hero {
-    padding: 110px 48px 90px;
-    text-align: center;
-    border-bottom: 1px solid var(--border);
-    position: relative;
-    overflow: hidden;
-  }
-  
-  .hero::before {
-    content: '';
-    position: absolute;
-    top: -80px;
-    left: 50%;
-    transform: translateX(-50%);
-    width: 600px;
-    height: 400px;
-    background: radial-gradient(ellipse, rgba(180, 140, 50, 0.06) 0%, transparent 70%);
-    pointer-events: none;
-  }
-  
-  .hero__eyebrow {
-    font-family: var(--font-title);
-    font-size: 0.65rem;
-    letter-spacing: 0.28em;
-    text-transform: uppercase;
-    color: var(--gold);
-    opacity: 0.75;
-    margin-bottom: 22px;
-    opacity: 0;
-    animation: fadeUp 0.7s 0.1s ease forwards;
-  }
-  
-  .hero__title {
-    font-family: var(--font-title);
-    font-size: clamp(2.4rem, 5.5vw, 4.5rem);
-    font-weight: 600;
-    letter-spacing: 0.02em;
-    line-height: 1.1;
-    color: var(--parchment);
-    max-width: 820px;
-    margin: 0 auto 0;
-    opacity: 0;
-    animation: fadeUp 0.7s 0.2s ease forwards;
-  }
-  
-  .hero__title-italic {
-    display: block;
-    font-family: var(--font-body);
-    font-style: italic;
-    font-weight: 400;
-    font-size: clamp(2.8rem, 6vw, 5rem);
-    color: var(--gold);
-    margin-top: 4px;
-    letter-spacing: 0;
-  }
-  
-  .hero__rule {
-    width: 80px;
-    height: 1px;
-    background: linear-gradient(90deg, transparent, var(--gold), transparent);
-    margin: 28px auto;
-    opacity: 0;
-    animation: fadeUp 0.7s 0.3s ease forwards;
-  }
-  
-  .hero__subtitle {
-    font-family: var(--font-body);
-    font-style: italic;
-    font-size: 1.1rem;
-    color: var(--text-muted);
-    max-width: 500px;
-    margin: 0 auto 40px;
-    line-height: 1.85;
-    opacity: 0;
-    animation: fadeUp 0.7s 0.35s ease forwards;
-  }
-  
-  .hero__actions {
-    display: flex;
-    gap: 16px;
-    justify-content: center;
-    flex-wrap: wrap;
-    opacity: 0;
-    animation: fadeUp 0.7s 0.45s ease forwards;
-  }
-  
-  .hero__btn-primary {
-    font-family: var(--font-title);
-    font-size: 0.68rem;
-    letter-spacing: 0.16em;
-    text-transform: uppercase;
-    color: var(--gold);
-    padding: 13px 30px;
-    border: 1px solid var(--gold-dim);
-    background: var(--gold-faint);
-    transition: background 0.2s, border-color 0.2s;
-  }
-  
-  .hero__btn-primary:hover {
-    background: rgba(201, 168, 76, 0.2);
-    border-color: var(--gold);
-  }
-  
-  .hero__btn-secondary {
-    font-family: var(--font-title);
-    font-size: 0.68rem;
-    letter-spacing: 0.16em;
-    text-transform: uppercase;
-    color: var(--text-muted);
-    padding: 13px 30px;
-    border: 1px solid rgba(232, 220, 200, 0.15);
-    transition: color 0.2s, border-color 0.2s;
-  }
-  
-  .hero__btn-secondary:hover {
-    color: var(--text);
-    border-color: rgba(232, 220, 200, 0.35);
-  }
-  
-  @keyframes fadeUp {
-    from { opacity: 0; transform: translateY(20px); }
-    to   { opacity: 1; transform: translateY(0); }
-  }
-  
-  /* ── Stats ───────────────────────────── */
-  .stats {
-    display: flex;
-    justify-content: center;
-    border-bottom: 1px solid var(--border);
-  }
-  
-  .stats__item {
-    flex: 1;
-    max-width: 240px;
-    text-align: center;
-    padding: 36px 16px;
-    border-right: 1px solid var(--border);
-  }
-  
-  .stats__item:last-child {
-    border-right: none;
-  }
-  
-  .stats__value {
-    font-family: var(--font-title);
-    font-size: 2rem;
-    font-weight: 600;
-    color: var(--gold);
-    letter-spacing: 0.04em;
-  }
-  
-  .stats__label {
-    font-family: var(--font-title);
-    font-size: 0.6rem;
-    letter-spacing: 0.18em;
-    text-transform: uppercase;
-    color: var(--text-dim);
-    margin-top: 6px;
-  }
-  
-  /* ── Section header ──────────────────── */
-  .section-header {
-    text-align: center;
-    padding: 80px 24px 0;
-  }
-  
-  .section-header__eyebrow {
-    font-family: var(--font-title);
-    font-size: 0.6rem;
-    letter-spacing: 0.28em;
-    text-transform: uppercase;
-    color: rgba(201, 168, 76, 0.55);
-    margin-bottom: 14px;
-  }
-  
-  .section-header__title {
-    font-family: var(--font-title);
-    font-size: clamp(1.4rem, 3vw, 2.2rem);
-    font-weight: 600;
-    color: var(--parchment);
-    letter-spacing: 0.04em;
-  }
-  
-  /* ── Features ────────────────────────── */
-  .features {
-    padding: 40px 0 80px;
-  }
-  
-  .features__grid {
-    display: grid;
-    grid-template-columns: repeat(4, 1fr);
-    gap: 1px;
-    background: var(--border);
-    border-top: 1px solid var(--border);
-    border-bottom: 1px solid var(--border);
-  }
-  
-  @media (max-width: 1000px) {
-    .features__grid { grid-template-columns: repeat(3, 1fr); }
-  }
-  
-  @media (max-width: 700px) {
-    .features__grid { grid-template-columns: repeat(2, 1fr); }
-    .hero { padding: 80px 24px 60px; }
-    .navbar { padding: 0 20px; }
-    .stats { flex-direction: column; align-items: center; }
-    .stats__item { border-right: none; border-bottom: 1px solid var(--border); max-width: 100%; width: 100%; }
-  }
-  
-  @media (max-width: 420px) {
-    .features__grid { grid-template-columns: 1fr; }
-  }
-  
-  /* ── Feature card ────────────────────── */
-  .feature-card {
-    background: var(--bg);
-    padding: 30px 24px 26px;
-    display: flex;
-    flex-direction: column;
-    gap: 9px;
-    text-decoration: none;
-    color: var(--text);
-    transition: background 0.25s;
-    position: relative;
-    overflow: hidden;
-  }
-  
-  .feature-card::after {
-    content: '';
-    position: absolute;
-    bottom: 0;
-    left: 0;
-    right: 0;
-    height: 1px;
-    background: linear-gradient(90deg, transparent, var(--gold), transparent);
-    opacity: 0;
-    transition: opacity 0.3s;
-  }
-  
-  .feature-card:hover {
-    background: #131007;
-  }
-  
-  .feature-card:hover::after {
-    opacity: 1;
-  }
-  
-  .feature-card__glyph {
-    font-size: 1.4rem;
-    margin-bottom: 4px;
-    opacity: 0.8;
-    line-height: 1;
-  }
-  
-  .feature-card__title {
-    font-family: var(--font-title);
-    font-size: 0.8rem;
-    font-weight: 600;
-    letter-spacing: 0.05em;
-    color: var(--parchment);
-    line-height: 1.4;
-  }
-  
-  .feature-card__desc {
-    font-family: var(--font-body);
-    font-style: italic;
-    font-size: 0.9rem;
-    color: var(--text-muted);
-    line-height: 1.65;
-    flex: 1;
-  }
-  
-  .feature-card__arrow {
-    font-family: var(--font-title);
-    font-size: 0.65rem;
-    letter-spacing: 0.12em;
-    text-transform: uppercase;
-    color: var(--text-dim);
-    transition: color 0.2s;
-    margin-top: 6px;
-  }
-  
-  .feature-card:hover .feature-card__arrow {
-    color: var(--gold);
-  }
-  
-  .badge {
-    display: inline-block;
-    font-family: var(--font-title);
-    font-size: 0.55rem;
-    letter-spacing: 0.12em;
-    text-transform: uppercase;
-    padding: 3px 9px;
-    align-self: flex-start;
-    margin-bottom: 2px;
-  }
-  
-  .badge--admin {
-    border: 1px solid var(--rust-dim);
-    color: var(--rust);
-  }
-  
-  .badge--user {
-    border: 1px solid var(--gold-dim);
-    color: rgba(201, 168, 76, 0.65);
-  }
-  
-  /* ── Footer CTA ──────────────────────── */
-  .home-cta {
-    padding: 100px 24px;
-    text-align: center;
-    border-top: 1px solid var(--border);
-    position: relative;
-    overflow: hidden;
-  }
-  
-  .home-cta::before {
-    content: '';
-    position: absolute;
-    bottom: -60px;
-    left: 50%;
-    transform: translateX(-50%);
-    width: 500px;
-    height: 300px;
-    background: radial-gradient(ellipse, rgba(180, 140, 50, 0.05) 0%, transparent 70%);
-    pointer-events: none;
-  }
-  
-  .home-cta__rule {
-    width: 60px;
-    height: 1px;
-    background: linear-gradient(90deg, transparent, var(--gold), transparent);
-    margin: 0 auto 32px;
-  }
-  
-  .home-cta__title {
-    font-family: var(--font-title);
-    font-size: clamp(1.8rem, 4vw, 3rem);
-    font-weight: 600;
-    letter-spacing: 0.04em;
-    color: var(--parchment);
-    margin-bottom: 16px;
-    line-height: 1.15;
-  }
-  
-  .home-cta__sub {
-    font-family: var(--font-body);
-    font-style: italic;
-    font-size: 1rem;
-    color: var(--text-muted);
-    margin-bottom: 40px;
-  }
-  
-  .home-cta__btn {
-    display: inline-block;
-    font-family: var(--font-title);
-    font-size: 0.68rem;
-    letter-spacing: 0.18em;
-    text-transform: uppercase;
-    color: var(--gold);
-    padding: 13px 36px;
-    border: 1px solid var(--gold-dim);
-    background: var(--gold-faint);
-    transition: background 0.2s, border-color 0.2s;
-    cursor: pointer;
-  }
-  
-  .home-cta__btn:hover {
-    background: rgba(201, 168, 76, 0.2);
-    border-color: var(--gold);
-  }
@@ -1,98 +0,0 @@
-.navbar {
-    position: sticky;
-    top: 0;
-    z-index: 200;
-    height: 56px;
-    display: flex;
-    align-items: center;
-    justify-content: space-between;
-    padding: 0 48px;
-    background: rgba(13, 11, 8, 0.94);
-    border-bottom: 1px solid var(--border);
-    backdrop-filter: blur(12px);
-    -webkit-backdrop-filter: blur(12px);
-  }
-  
-  .navbar__logo {
-    font-family: var(--font-title);
-    font-size: 1.05rem;
-    font-weight: 600;
-    letter-spacing: 0.22em;
-    color: var(--gold);
-    text-transform: uppercase;
-  }
-  
-  .navbar__links {
-    display: flex;
-    gap: 8px;
-    list-style: none;
-  }
-  
-  .navbar__links a {
-    font-family: var(--font-title);
-    font-size: 0.7rem;
-    letter-spacing: 0.14em;
-    text-transform: uppercase;
-    color: var(--text-muted);
-    padding: 6px 14px;
-    transition: color 0.2s;
-    position: relative;
-  }
-  
-  .navbar__links a::after {
-    content: '';
-    position: absolute;
-    bottom: 0;
-    left: 14px;
-    right: 14px;
-    height: 1px;
-    background: var(--gold);
-    transform: scaleX(0);
-    transition: transform 0.25s ease;
-  }
-  
-  .navbar__links a:hover {
-    color: var(--gold);
-  }
-  
-  .navbar__links a:hover::after {
-    transform: scaleX(1);
-  }
-  
-  .navbar__actions {
-    display: flex;
-    gap: 10px;
-  }
-  
-  .btn-ghost {
-    font-family: var(--font-title);
-    font-size: 0.65rem;
-    letter-spacing: 0.14em;
-    text-transform: uppercase;
-    color: var(--text-muted);
-    padding: 7px 16px;
-    border: 1px solid rgba(232, 220, 200, 0.15);
-    transition: color 0.2s, border-color 0.2s;
-  }
-  
-  .btn-ghost:hover {
-    color: var(--text);
-    border-color: rgba(232, 220, 200, 0.35);
-  }
-  
-  .btn-cta {
-    font-family: var(--font-title);
-    font-size: 0.65rem;
-    letter-spacing: 0.14em;
-    text-transform: uppercase;
-    color: var(--gold);
-    padding: 7px 16px;
-    border: 1px solid var(--gold-dim);
-    background: var(--gold-faint);
-    transition: background 0.2s, border-color 0.2s;
-  }
-  
-  .btn-cta:hover {
-    background: rgba(201, 168, 76, 0.18);
-    border-color: var(--gold);
-  }
@@ -0,0 +1,38 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
@@ -0,0 +1,78 @@
+# mylibrary — back-end Java (méthode BDD)
+
+Back-end du projet **2026-DEV-BUT3**. Reproduit, en Java pur, le cœur métier
+de l'API consommée par le front React `my-library/`.
+
+## Méthode
+
+Conformément au cours `maintenanceApplicativeCours1.pdf` (Behavior-Driven
+Development), pour chaque comportement on :
+
+1. Écrit le scénario attendu (en Gherkin / `.feature` ou en `@DisplayName` JUnit)
+2. Écrit le test qui le vérifie
+3. Implémente le code qui fait passer le test
+
+## Structure (calquée sur le module `customer` fourni par le prof)
+
+```
+src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/
+├─ customer/        Module fourni par l'enseignant (intact)
+│  ├─ CustomerInfo.java   record d'entrée
+│  ├─ CustomerDTO.java    DTO de sortie
+│  ├─ entity/             Customer (objet métier, règles fidélité)
+│  ├─ exception/          Exceptions métier
+│  ├─ converter/          Mapping Info <-> entity <-> DTO
+│  ├─ validator/          Règles de validation
+│  ├─ repository/         Stockage en mémoire (List)
+│  └─ usecase/            Cas d'usage (orchestration)
+└─ book/             Module développé en miroir (notre travail)
+   └─ … (mêmes sous-paquets, même découpage)
+
+src/test/java/.../mylibrary/
+├─ customer/         Tests JUnit fournis par l'enseignant
+├─ book/             Tests JUnit que nous avons écrits
+└─ features/
+   ├─ RunCucumberTest.java         (du prof, intact)
+   ├─ client/CustomerSteps.java    (du prof, intact)
+   ├─ book/BookSteps.java          (notre travail)
+   └─ resources/features/
+      ├─ client.feature            (du prof, intact)
+      └─ book.feature              (notre travail)
+```
+
+## Dépendances
+
+Strictement les mêmes que dans le template du prof :
+
+- JUnit 5 (jupiter-api, params, engine + platform-suite, platform-engine, platform-launcher)
+- Mockito (core, junit-jupiter)
+- Cucumber (cucumber-java, cucumber-junit-platform-engine)
+- Lombok
+
+## Build & test
+
+Pré-requis : **JDK 21** + **Maven 3.9+**
+
+```bash
+mvn -f mylibrary test
+```
+
+Cette commande exécute :
+
+- les tests unitaires JUnit (entity, validator, converter, repository, usecase, exceptions)
+- les scénarios Cucumber (`client.feature` + `book.feature`) via `RunCucumberTest`
+
+## Périmètre couvert
+
+Conformément à la consigne (« reproduire le strict nécessaire pour démontrer
+la maîtrise »), l'API se limite aux deux domaines présents dans le swagger
+qui structurent l'app React :
+
+- **Catalogue** (`book`) : enregistrer, consulter par ISBN, lister tous les livres,
+  refuser ISBN dupliqué, refuser un livre invalide, gérer le stock.
+- **Comptes clients** (`customer`) : enregistrer, consulter par téléphone, mettre
+  à jour, supprimer, ajouter / retirer des points de fidélité (module fourni).
+
+L'exposition HTTP réelle utilisée par les développeurs front est l'API du prof
+(`mylibrary-0.0.1-SNAPSHOT.jar`) ; ce module sert à démontrer la maîtrise
+de la **conception métier en BDD/TDD**.
@@ -0,0 +1,151 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>fr.iut_fbleau.but3.dev62</groupId>
+  <artifactId>mylibrary</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <properties>
+    <!--    Your java version-->
+    <maven.compiler.source>21</maven.compiler.source>
+    <maven.compiler.target>21</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
+    <!--    Main dependencies -->
+    <lombok.version>1.18.36</lombok.version>
+
+    <!--    Test Verisons-->
+    <junit.version>5.11.4</junit.version>
+    <junit.platform.version>1.11.4</junit.platform.version>
+    <cucumber.version>7.21.1</cucumber.version>
+    <mockito.version>5.16.0</mockito.version>
+
+    <!--  Maven build version  -->
+    <maven.compiler.version>3.13.0</maven.compiler.version>
+    <maven.surefire.version>3.5.2</maven.surefire.version>
+  </properties>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>io.cucumber</groupId>
+        <artifactId>cucumber-bom</artifactId>
+        <version>${cucumber.version}</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+      <dependency>
+        <groupId>org.junit</groupId>
+        <artifactId>junit-bom</artifactId>
+        <version>${junit.version}</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+      <version>${lombok.version}</version>
+      <scope>provided</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>io.cucumber</groupId>
+      <artifactId>cucumber-java</artifactId>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>io.cucumber</groupId>
+      <artifactId>cucumber-junit-platform-engine</artifactId>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.junit.platform</groupId>
+      <artifactId>junit-platform-suite</artifactId>
+      <version>${junit.platform.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.platform</groupId>
+      <artifactId>junit-platform-engine</artifactId>
+      <version>${junit.platform.version}</version>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <version>${junit.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-params</artifactId>
+      <version>${junit.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
+      <version>${junit.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.platform</groupId>
+      <artifactId>junit-platform-launcher</artifactId>
+      <version>${junit.platform.version}</version>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <version>${mockito.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-junit-jupiter</artifactId>
+      <version>${mockito.version}</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>${maven.compiler.version}</version>
+        <configuration>
+          <encoding>${project.build.sourceEncoding}</encoding>
+          <source>${maven.compiler.source}</source>
+          <target>${maven.compiler.target}</target>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <version>${maven.surefire.version}</version>
+        <configuration>
+          <properties>
+            <!-- Work around. Surefire does not include enough
+                 information to disambiguate between different
+                 examples and scenarios. -->
+            <configurationParameters>
+              cucumber.junit-platform.naming-strategy=long
+            </configurationParameters>
+          </properties>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>
@@ -0,0 +1,22 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Category;
+import java.time.LocalDate;
+import java.util.List;
+import lombok.Builder;
+import lombok.Getter;
+
+@Builder
+@Getter
+public class BookDTO {
+  private final long isbn;
+  private final String title;
+  private final String author;
+  private final String publisher;
+  private final LocalDate publicationDate;
+  private final double price;
+  private final int quantity;
+  private final List<Category> categories;
+  private final String description;
+  private final String language;
+}
@@ -0,0 +1,19 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Category;
+import java.time.LocalDate;
+import java.util.List;
+
+public record BookInfo(
+    long isbn,
+    String title,
+    String author,
+    String publisher,
+    LocalDate publicationDate,
+    double price,
+    int quantity,
+    List<Category> categories,
+    String description,
+    String language
+) {
+}
@@ -0,0 +1,42 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.converter;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookDTO;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Book;
+
+public final class BookConverter {
+
+  private BookConverter() {
+
+  }
+
+  public static Book toDomain(BookInfo book) {
+    return Book.builder()
+        .isbn(book.isbn())
+        .title(book.title())
+        .author(book.author())
+        .publisher(book.publisher())
+        .publicationDate(book.publicationDate())
+        .price(book.price())
+        .quantity(book.quantity())
+        .categories(book.categories())
+        .description(book.description())
+        .language(book.language())
+        .build();
+  }
+
+  public static BookDTO toDTO(Book book) {
+    return BookDTO.builder()
+        .isbn(book.getIsbn())
+        .title(book.getTitle())
+        .author(book.getAuthor())
+        .publisher(book.getPublisher())
+        .publicationDate(book.getPublicationDate())
+        .price(book.getPrice())
+        .quantity(book.getQuantity())
+        .categories(book.getCategories())
+        .description(book.getDescription())
+        .language(book.getLanguage())
+        .build();
+  }
+}
@@ -0,0 +1,24 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.entity;
+
+public enum Category {
+  FICTION,
+  NON_FICTION,
+  SCIENCE_FICTION,
+  FANTASY,
+  MYSTERY,
+  THRILLER,
+  ROMANCE,
+  BIOGRAPHY,
+  HISTORY,
+  POETRY,
+  CHILDRENS,
+  YOUNG_ADULT,
+  SCIENCE,
+  PHILOSOPHY,
+  SELF_HELP,
+  TRAVEL,
+  COOKING,
+  ART,
+  RELIGION,
+  REFERENCE
+}
@@ -0,0 +1,13 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.exception;
+
+import java.text.MessageFormat;
+
+public class BookAlreadyExistsException extends Exception {
+
+  public static final String A_BOOK_WITH_ISBN_ALREADY_EXISTS_MESSAGE = "A book with isbn {0} already exists";
+
+  public BookAlreadyExistsException(long isbn) {
+    // ISBN passe en String pour ne pas que MessageFormat ajoute le separateur de milliers
+    super(MessageFormat.format(A_BOOK_WITH_ISBN_ALREADY_EXISTS_MESSAGE, String.valueOf(isbn)));
+  }
+}
@@ -0,0 +1,13 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.exception;
+
+import java.text.MessageFormat;
+
+public class BookNotFoundException extends Exception {
+
+  public static final String THE_BOOK_WITH_ISBN_DOES_NOT_EXIST_MESSAGE = "The book with isbn {0} does not exist";
+
+  public BookNotFoundException(long isbn) {
+    // ISBN passe en String pour ne pas que MessageFormat ajoute le separateur de milliers
+    super(MessageFormat.format(THE_BOOK_WITH_ISBN_DOES_NOT_EXIST_MESSAGE, String.valueOf(isbn)));
+  }
+}
@@ -0,0 +1,12 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.exception;
+
+import java.text.MessageFormat;
+
+public class IllegalBookQuantityException extends Exception {
+
+  public static final String CANNOT_REMOVE_STOCK = "Cannot remove {0} units from {1} units in stock";
+
+  public IllegalBookQuantityException(int needed, int actual) {
+    super(MessageFormat.format(CANNOT_REMOVE_STOCK, needed, actual));
+  }
+}
@@ -0,0 +1,8 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.exception;
+
+public class NotValidBookException extends Exception {
+
+  public NotValidBookException(String message) {
+    super(message);
+  }
+}
@@ -0,0 +1,42 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.repository;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Book;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor
+public final class BookRepository {
+
+  private final List<Book> books = new ArrayList<>();
+
+  public List<Book> findAll() {
+    return books;
+  }
+
+  public void deleteAll() {
+    books.clear();
+  }
+
+  public Book save(Book book) {
+    Optional<Book> existing = findByIsbn(book.getIsbn());
+    existing.ifPresent(books::remove);
+    books.add(book);
+    return book;
+  }
+
+  public Optional<Book> findByIsbn(long isbn) {
+    return books.stream()
+        .filter(b -> b.getIsbn() == isbn)
+        .findFirst();
+  }
+
+  public boolean existsByIsbn(long isbn) {
+    return books.stream().anyMatch(b -> b.getIsbn() == isbn);
+  }
+
+  public void delete(Book book) {
+    books.remove(book);
+  }
+}
@@ -0,0 +1,46 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.usecase;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookDTO;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.converter.BookConverter;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Book;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.BookAlreadyExistsException;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.BookNotFoundException;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.NotValidBookException;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.repository.BookRepository;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.validator.BookValidator;
+import java.util.List;
+import java.util.Optional;
+
+public final class BookUseCase {
+
+  private final BookRepository bookRepository;
+
+  public BookUseCase(BookRepository bookRepository) {
+    this.bookRepository = bookRepository;
+  }
+
+  public long registerBook(BookInfo bookInfo) throws NotValidBookException, BookAlreadyExistsException {
+    BookValidator.validate(bookInfo);
+    if (bookRepository.existsByIsbn(bookInfo.isbn())) {
+      throw new BookAlreadyExistsException(bookInfo.isbn());
+    }
+    Book toRegister = BookConverter.toDomain(bookInfo);
+    Book registered = bookRepository.save(toRegister);
+    return registered.getIsbn();
+  }
+
+  public BookDTO getBookByIsbn(long isbn) throws BookNotFoundException {
+    Optional<Book> optional = bookRepository.findByIsbn(isbn);
+    if (optional.isEmpty()) {
+      throw new BookNotFoundException(isbn);
+    }
+    return BookConverter.toDTO(optional.get());
+  }
+
+  public List<BookDTO> getAllBooks() {
+    return bookRepository.findAll().stream()
+        .map(BookConverter::toDTO)
+        .toList();
+  }
+}
@@ -0,0 +1,93 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.validator;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.NotValidBookException;
+
+public final class BookValidator {
+
+  public static final int TITLE_MAX_LENGTH = 255;
+
+  public static final String ISBN_MUST_BE_POSITIVE = "Isbn must be a positive number";
+  public static final String TITLE_CANNOT_BE_BLANK = "Title cannot be blank";
+  public static final String TITLE_TOO_LONG = "Title cannot exceed " + TITLE_MAX_LENGTH + " characters";
+  public static final String AUTHOR_CANNOT_BE_BLANK = "Author cannot be blank";
+  public static final String PUBLISHER_CANNOT_BE_BLANK = "Publisher cannot be blank";
+  public static final String PUBLICATION_DATE_REQUIRED = "Publication date is required";
+  public static final String PRICE_MUST_BE_POSITIVE = "Price must be strictly positive";
+  public static final String QUANTITY_MUST_BE_POSITIVE_OR_ZERO = "Quantity must be >= 0";
+  public static final String CATEGORIES_REQUIRED = "At least one category is required";
+  public static final String LANGUAGE_CANNOT_BE_BLANK = "Language cannot be blank";
+
+  private BookValidator() {
+
+  }
+
+  public static void validate(BookInfo book) throws NotValidBookException {
+    validateIsbn(book);
+    validateTitle(book);
+    validateAuthor(book);
+    validatePublisher(book);
+    validatePublicationDate(book);
+    validatePrice(book);
+    validateQuantity(book);
+    validateCategories(book);
+    validateLanguage(book);
+  }
+
+  private static void validateIsbn(BookInfo book) throws NotValidBookException {
+    if (book.isbn() <= 0) {
+      throw new NotValidBookException(ISBN_MUST_BE_POSITIVE);
+    }
+  }
+
+  private static void validateTitle(BookInfo book) throws NotValidBookException {
+    if (book.title() == null || book.title().isBlank()) {
+      throw new NotValidBookException(TITLE_CANNOT_BE_BLANK);
+    }
+    if (book.title().length() > TITLE_MAX_LENGTH) {
+      throw new NotValidBookException(TITLE_TOO_LONG);
+    }
+  }
+
+  private static void validateAuthor(BookInfo book) throws NotValidBookException {
+    if (book.author() == null || book.author().isBlank()) {
+      throw new NotValidBookException(AUTHOR_CANNOT_BE_BLANK);
+    }
+  }
+
+  private static void validatePublisher(BookInfo book) throws NotValidBookException {
+    if (book.publisher() == null || book.publisher().isBlank()) {
+      throw new NotValidBookException(PUBLISHER_CANNOT_BE_BLANK);
+    }
+  }
+
+  private static void validatePublicationDate(BookInfo book) throws NotValidBookException {
+    if (book.publicationDate() == null) {
+      throw new NotValidBookException(PUBLICATION_DATE_REQUIRED);
+    }
+  }
+
+  private static void validatePrice(BookInfo book) throws NotValidBookException {
+    if (book.price() <= 0) {
+      throw new NotValidBookException(PRICE_MUST_BE_POSITIVE);
+    }
+  }
+
+  private static void validateQuantity(BookInfo book) throws NotValidBookException {
+    if (book.quantity() < 0) {
+      throw new NotValidBookException(QUANTITY_MUST_BE_POSITIVE_OR_ZERO);
+    }
+  }
+
+  private static void validateCategories(BookInfo book) throws NotValidBookException {
+    if (book.categories() == null || book.categories().isEmpty()) {
+      throw new NotValidBookException(CATEGORIES_REQUIRED);
+    }
+  }
+
+  private static void validateLanguage(BookInfo book) throws NotValidBookException {
+    if (book.language() == null || book.language().isBlank()) {
+      throw new NotValidBookException(LANGUAGE_CANNOT_BE_BLANK);
+    }
+  }
+}
@@ -0,0 +1,15 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer;
+
+import java.util.UUID;
+import lombok.Builder;
+import lombok.Getter;
+
+@Builder
+@Getter
+public class CustomerDTO {
+  private final UUID id;
+  private final String firstName;
+  private final String lastName;
+  private final String phoneNumber;
+  private final int loyaltyPoints;
+}
@@ -0,0 +1,4 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer;
+
+public record CustomerInfo(String firstName, String lastName, String phoneNumber) {
+}
@@ -0,0 +1,30 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer.converter;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.CustomerDTO;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.CustomerInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.entity.Customer;
+
+public final class CustomerConverter {
+  private CustomerConverter(){
+
+  }
+
+  public static Customer toDomain(CustomerInfo newCustomer) {
+    return Customer.builder()
+        .firstName(newCustomer.firstName())
+        .lastName(newCustomer.lastName())
+        .phoneNumber(newCustomer.phoneNumber())
+        .loyaltyPoints(0)
+        .build();
+  }
+
+  public static CustomerDTO toDTO(Customer customer) {
+    return CustomerDTO.builder()
+        .id(customer.getId())
+        .firstName(customer.getFirstName())
+        .lastName(customer.getLastName())
+        .phoneNumber(customer.getPhoneNumber())
+        .loyaltyPoints(customer.getLoyaltyPoints())
+        .build();
+  }
+}
@@ -0,0 +1,30 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer.entity;
+
+
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.exception.IllegalCustomerPointException;
+import java.util.UUID;
+import lombok.Builder;
+import lombok.Getter;
+
+@Builder
+@Getter
+public class Customer {
+ private UUID id;
+ private String firstName;
+ private String lastName;
+ private String phoneNumber;
+ private int loyaltyPoints;
+
+ public void setRandomUUID() {
+  this.id = UUID.randomUUID();
+ }
+
+ public void addLoyaltyPoints(int loyaltyPointToAdd) {
+  this.loyaltyPoints += loyaltyPointToAdd;
+ }
+
+ public void removeLoyaltyPoints(int loyaltyPointToRemove) throws IllegalCustomerPointException {
+  if (loyaltyPointToRemove > this.loyaltyPoints) throw new IllegalCustomerPointException(loyaltyPointToRemove, this.loyaltyPoints);
+  this.loyaltyPoints -= loyaltyPointToRemove;
+ }
+}
@@ -0,0 +1,13 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer.exception;
+
+import java.text.MessageFormat;
+import java.util.UUID;
+
+public class CustomerNotFoundException extends Exception {
+
+  public static final String THE_CUSTOMER_WITH_ID_DOES_NOT_EXIST_MESSAGE = "The customer with id {0} does not exist";
+
+  public CustomerNotFoundException(UUID uuid) {
+    super(MessageFormat.format(THE_CUSTOMER_WITH_ID_DOES_NOT_EXIST_MESSAGE, uuid));
+  }
+}
@@ -0,0 +1,13 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer.exception;
+
+import java.text.MessageFormat;
+
+public class IllegalCustomerPointException extends Exception {
+
+  public static final String CANNOT_REMOVE_LOYALTY_POINTS = "Cannot remove {0} points from {1} points";
+
+  public IllegalCustomerPointException(int needed, int actual) {
+    super(MessageFormat.format(CANNOT_REMOVE_LOYALTY_POINTS, needed,
+        actual));
+  }
+}
@@ -0,0 +1,8 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer.exception;
+
+public class NotValidCustomerException extends Exception {
+
+  public NotValidCustomerException(String message) {
+    super(message);
+  }
+}
@@ -0,0 +1,49 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer.repository;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.entity.Customer;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor
+public final class CustomerRepository {
+  private final List<Customer> customers = new ArrayList<>();
+
+  public List<Customer> findAll() {
+    return customers;
+  }
+
+  public void deleteAll() {
+    customers.clear();
+  }
+
+  public Customer save(Customer newCustomer) {
+    Optional<Customer> optionalCustomerWithSameId = this.findById(newCustomer.getId());
+    optionalCustomerWithSameId.ifPresentOrElse(customers::remove, newCustomer::setRandomUUID);
+    this.customers.add(newCustomer);
+    return newCustomer;
+  }
+
+  public Optional<Customer> findById(UUID uuid) {
+    return this.customers.stream()
+        .filter(customer -> customer.getId().equals(uuid))
+        .findFirst();
+  }
+
+  public boolean existsById(UUID uuid) {
+    return this.customers.stream()
+        .anyMatch(customer -> customer.getId().equals(uuid));
+  }
+
+  public Optional<Customer> findByPhoneNumber(String phoneNumber) {
+    return this.customers.stream()
+        .filter(customer -> customer.getPhoneNumber().equals(phoneNumber))
+        .findFirst();
+  }
+
+  public void delete(Customer customer) {
+    this.customers.remove(customer);
+  }
+}
@@ -0,0 +1,81 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer.usecase;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.CustomerDTO;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.CustomerInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.converter.CustomerConverter;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.entity.Customer;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.exception.CustomerNotFoundException;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.exception.IllegalCustomerPointException;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.exception.NotValidCustomerException;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.repository.CustomerRepository;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.validator.CustomerValidator;
+import java.util.Optional;
+import java.util.UUID;
+
+public final class CustomerUseCase {
+
+  private final CustomerRepository customerRepository;
+
+  public CustomerUseCase(CustomerRepository customerRepository) {
+    this.customerRepository = customerRepository;
+  }
+
+  public UUID registerCustomer(CustomerInfo newCustomer) throws NotValidCustomerException {
+    CustomerValidator.validate(newCustomer);
+    Customer customerToRegister = CustomerConverter.toDomain(newCustomer);
+    Customer customerToRegistered = customerRepository.save(customerToRegister);
+    return customerToRegistered.getId();
+  }
+
+  public Optional<CustomerDTO> findCustomerByPhoneNumber(String phoneNumber) {
+    Optional<Customer> optionalCustomer = customerRepository.findByPhoneNumber(phoneNumber);
+    return optionalCustomer.map(CustomerConverter::toDTO);
+  }
+
+  public CustomerDTO updateCustomer(UUID uuid, CustomerInfo customerInfo)
+      throws CustomerNotFoundException, NotValidCustomerException {
+    CustomerValidator.validate(customerInfo);
+    Customer customerByUUID = getCustomerIfDoesNotExistThrowCustomerNotFoundException(
+        uuid);
+    Customer customer = Customer.builder()
+        .id(uuid)
+        .firstName(customerInfo.firstName())
+        .lastName(customerInfo.lastName())
+        .phoneNumber(customerInfo.phoneNumber())
+        .loyaltyPoints(customerByUUID.getLoyaltyPoints())
+        .build();
+    Customer updatedCustomer = customerRepository.save(customer);
+    return CustomerConverter.toDTO(updatedCustomer);
+  }
+
+  public void deleteCustomer(UUID uuid) throws CustomerNotFoundException {
+    Customer customerToDelete = getCustomerIfDoesNotExistThrowCustomerNotFoundException(uuid);
+    this.customerRepository.delete(customerToDelete);
+  }
+
+  public int addLoyaltyPoints(UUID uuid, int loyaltyPointToAdd) throws CustomerNotFoundException {
+    Customer customerToAddLoyaltyPoints = getCustomerIfDoesNotExistThrowCustomerNotFoundException(
+        uuid);
+    customerToAddLoyaltyPoints.addLoyaltyPoints(loyaltyPointToAdd);
+    customerRepository.save(customerToAddLoyaltyPoints);
+    return customerToAddLoyaltyPoints.getLoyaltyPoints();
+  }
+
+  public int subtractLoyaltyPoints(UUID uuid, int loyaltyPointToRemove)
+      throws CustomerNotFoundException, IllegalCustomerPointException {
+    Customer customerToSubtractLoyaltyPoints = getCustomerIfDoesNotExistThrowCustomerNotFoundException(
+        uuid);
+    customerToSubtractLoyaltyPoints.removeLoyaltyPoints(loyaltyPointToRemove);
+    customerRepository.save(customerToSubtractLoyaltyPoints);
+    return customerToSubtractLoyaltyPoints.getLoyaltyPoints();
+  }
+
+  private Customer getCustomerIfDoesNotExistThrowCustomerNotFoundException(UUID uuid)
+      throws CustomerNotFoundException {
+    Optional<Customer> optionalCustomerById = customerRepository.findById(uuid);
+    if (optionalCustomerById.isEmpty()) {
+      throw new CustomerNotFoundException(uuid);
+    }
+    return optionalCustomerById.get();
+  }
+}
@@ -0,0 +1,44 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer.validator;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.CustomerInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.exception.NotValidCustomerException;
+
+public final class CustomerValidator {
+
+  public static final String PHONE_NUMBER_IS_NOT_VALID = "Phone number is not valid";
+  public static final String LAST_NAME_CANNOT_BE_BLANK = "Last name cannot be blank";
+  public static final String FIRST_NAME_CANNOT_BE_BLANK = "First name cannot be blank";
+  public static final String PHONE_NUMBER_REGEX = "0([67])\\d{8}";
+
+  private CustomerValidator() {
+
+  }
+
+  public static void validate(CustomerInfo newCustomer) throws NotValidCustomerException {
+    validateFirstName(newCustomer);
+    validateLastName(newCustomer);
+    validatePhoneNumber(newCustomer);
+  }
+
+  private static void validatePhoneNumber(CustomerInfo newCustomer)
+      throws NotValidCustomerException {
+    if (newCustomer.phoneNumber().isBlank()) {
+      throw new NotValidCustomerException("Phone number cannot be blank");
+    }
+    if (!newCustomer.phoneNumber().matches(PHONE_NUMBER_REGEX)) {
+      throw new NotValidCustomerException(PHONE_NUMBER_IS_NOT_VALID);
+    }
+  }
+
+  private static void validateLastName(CustomerInfo newCustomer) throws NotValidCustomerException {
+    if (newCustomer.lastName().isBlank()) {
+      throw new NotValidCustomerException(LAST_NAME_CANNOT_BE_BLANK);
+    }
+  }
+
+  private static void validateFirstName(CustomerInfo newCustomer) throws NotValidCustomerException {
+    if (newCustomer.firstName().isBlank()) {
+      throw new NotValidCustomerException(FIRST_NAME_CANNOT_BE_BLANK);
+    }
+  }
+}
@@ -0,0 +1,86 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.converter;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookDTO;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Book;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Category;
+import java.time.LocalDate;
+import java.util.List;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class BookConverterTest {
+
+  @Nested
+  @DisplayName("toDomain() method tests")
+  class ToDomainTests {
+
+    @Test
+    @DisplayName("Should convert BookInfo to Book entity preserving all fields")
+    void testToDomain() {
+      BookInfo info = new BookInfo(
+          9780321125217L,
+          "DDD",
+          "Evans",
+          "Addison-Wesley",
+          LocalDate.of(2003, 8, 22),
+          54.99,
+          10,
+          List.of(Category.SCIENCE),
+          "desc",
+          "EN"
+      );
+
+      Book book = BookConverter.toDomain(info);
+
+      assertEquals(info.isbn(), book.getIsbn());
+      assertEquals(info.title(), book.getTitle());
+      assertEquals(info.author(), book.getAuthor());
+      assertEquals(info.publisher(), book.getPublisher());
+      assertEquals(info.publicationDate(), book.getPublicationDate());
+      assertEquals(info.price(), book.getPrice());
+      assertEquals(info.quantity(), book.getQuantity());
+      assertEquals(info.categories(), book.getCategories());
+      assertEquals(info.description(), book.getDescription());
+      assertEquals(info.language(), book.getLanguage());
+    }
+  }
+
+  @Nested
+  @DisplayName("toDTO() method tests")
+  class ToDTOTests {
+
+    @Test
+    @DisplayName("Should convert Book entity to BookDTO preserving all fields")
+    void testToDTO() {
+      Book book = Book.builder()
+          .isbn(123L)
+          .title("T")
+          .author("A")
+          .publisher("P")
+          .publicationDate(LocalDate.of(2020, 1, 1))
+          .price(9.99)
+          .quantity(5)
+          .categories(List.of(Category.FICTION))
+          .description("d")
+          .language("FR")
+          .build();
+
+      BookDTO dto = BookConverter.toDTO(book);
+
+      assertEquals(123L, dto.getIsbn());
+      assertEquals("T", dto.getTitle());
+      assertEquals("A", dto.getAuthor());
+      assertEquals("P", dto.getPublisher());
+      assertEquals(LocalDate.of(2020, 1, 1), dto.getPublicationDate());
+      assertEquals(9.99, dto.getPrice());
+      assertEquals(5, dto.getQuantity());
+      assertEquals(List.of(Category.FICTION), dto.getCategories());
+      assertEquals("d", dto.getDescription());
+      assertEquals("FR", dto.getLanguage());
+    }
+  }
+}
@@ -0,0 +1,75 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.entity;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.IllegalBookQuantityException;
+import java.time.LocalDate;
+import java.util.List;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class BookTest {
+
+  @Test
+  @DisplayName("Builder should create a valid Book instance")
+  void testBookBuilder() {
+    long isbn = 9780321125217L;
+    Book book = Book.builder()
+        .isbn(isbn)
+        .title("Domain-Driven Design")
+        .author("Eric Evans")
+        .publisher("Addison-Wesley")
+        .publicationDate(LocalDate.of(2003, 8, 22))
+        .price(54.99)
+        .quantity(10)
+        .categories(List.of(Category.SCIENCE, Category.REFERENCE))
+        .description("Tackling complexity in the heart of software")
+        .language("EN")
+        .build();
+
+    assertEquals(isbn, book.getIsbn());
+    assertEquals("Domain-Driven Design", book.getTitle());
+    assertEquals("Eric Evans", book.getAuthor());
+    assertEquals("Addison-Wesley", book.getPublisher());
+    assertEquals(LocalDate.of(2003, 8, 22), book.getPublicationDate());
+    assertEquals(54.99, book.getPrice());
+    assertEquals(10, book.getQuantity());
+    assertEquals(List.of(Category.SCIENCE, Category.REFERENCE), book.getCategories());
+    assertEquals("EN", book.getLanguage());
+  }
+
+  @Nested
+  @DisplayName("Stock management")
+  class StockTests {
+
+    @Test
+    @DisplayName("addStock should increase the quantity")
+    void testAddStock() {
+      Book book = Book.builder().quantity(5).build();
+      book.addStock(7);
+      assertEquals(12, book.getQuantity());
+    }
+
+    @Test
+    @DisplayName("removeStock should decrease the quantity")
+    void testRemoveStock() throws IllegalBookQuantityException {
+      Book book = Book.builder().quantity(5).build();
+      book.removeStock(3);
+      assertEquals(2, book.getQuantity());
+    }
+
+    @Test
+    @DisplayName("removeStock should throw when removing more than available")
+    void testRemoveTooMuchStock() {
+      Book book = Book.builder().quantity(5).build();
+      IllegalBookQuantityException exception = assertThrows(
+          IllegalBookQuantityException.class,
+          () -> book.removeStock(10)
+      );
+      assertEquals(5, book.getQuantity());
+      assertTrue(exception.getMessage().contains("10"));
+      assertTrue(exception.getMessage().contains("5"));
+    }
+  }
+}
@@ -0,0 +1,26 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.exception;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class BookAlreadyExistsExceptionTest {
+
+  @Test
+  @DisplayName("Exception message should contain the ISBN provided")
+  void testExceptionMessageContainsIsbn() {
+    long isbn = 9780321125217L;
+
+    BookAlreadyExistsException exception = new BookAlreadyExistsException(isbn);
+
+    assertTrue(exception.getMessage().contains(String.valueOf(isbn)));
+  }
+
+  @Test
+  @DisplayName("Exception should expose its message constant")
+  void testConstantMessage() {
+    assertEquals("A book with isbn {0} already exists",
+        BookAlreadyExistsException.A_BOOK_WITH_ISBN_ALREADY_EXISTS_MESSAGE);
+  }
+}
@@ -0,0 +1,37 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.exception;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class BookNotFoundExceptionTest {
+
+  @Test
+  @DisplayName("Exception message should contain the ISBN provided")
+  void testExceptionMessageContainsIsbn() {
+    long isbn = 9780321125217L;
+
+    BookNotFoundException exception = new BookNotFoundException(isbn);
+
+    assertTrue(exception.getMessage().contains(String.valueOf(isbn)));
+  }
+
+  @Test
+  @DisplayName("Exception should expose its message constant")
+  void testConstantMessage() {
+    assertEquals("The book with isbn {0} does not exist",
+        BookNotFoundException.THE_BOOK_WITH_ISBN_DOES_NOT_EXIST_MESSAGE);
+  }
+
+  @Test
+  @DisplayName("Exception should be properly thrown and caught")
+  void testExceptionCanBeThrownAndCaught() {
+    long isbn = 1L;
+    try {
+      throw new BookNotFoundException(isbn);
+    } catch (BookNotFoundException e) {
+      assertTrue(e.getMessage().contains("1"));
+    }
+  }
+}
@@ -0,0 +1,33 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.exception;
+
+import java.text.MessageFormat;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class IllegalBookQuantityExceptionTest {
+
+  @Test
+  @DisplayName("Exception message should contain the requested and actual quantities")
+  void testExceptionMessageContainsQuantities() {
+    IllegalBookQuantityException exception = new IllegalBookQuantityException(10, 3);
+    String expected = "Cannot remove 10 units from 3 units in stock";
+    assertEquals(expected, exception.getMessage());
+  }
+
+  @ParameterizedTest
+  @CsvSource({
+      "10, 3",
+      "100, 0",
+      "5, 4"
+  })
+  @DisplayName("Message should be formatted using the constant template")
+  void testFormattedMessage(int needed, int actual) {
+    IllegalBookQuantityException exception = new IllegalBookQuantityException(needed, actual);
+    String expected = MessageFormat.format(IllegalBookQuantityException.CANNOT_REMOVE_STOCK, needed, actual);
+    assertEquals(expected, exception.getMessage());
+  }
+}
@@ -0,0 +1,44 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.exception;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class NotValidBookExceptionTest {
+
+  @Test
+  @DisplayName("Exception should be created with the provided message")
+  void testExceptionCreation() {
+    String msg = "title cannot be blank";
+    NotValidBookException exception = new NotValidBookException(msg);
+    assertEquals(msg, exception.getMessage());
+  }
+
+  @ParameterizedTest
+  @ValueSource(strings = {
+      "Title cannot be blank",
+      "Author cannot be blank",
+      "Price must be strictly positive",
+      "At least one category is required"
+  })
+  @DisplayName("Exception should propagate any validation message")
+  void testExceptionWithDifferentMessages(String message) {
+    NotValidBookException exception = new NotValidBookException(message);
+    assertEquals(message, exception.getMessage());
+  }
+
+  @Test
+  @DisplayName("Exception should be catchable as a general Exception")
+  void testExceptionInheritance() {
+    String msg = "invalid book";
+    try {
+      throw new NotValidBookException(msg);
+    } catch (Exception e) {
+      assertEquals(NotValidBookException.class, e.getClass());
+      assertEquals(msg, e.getMessage());
+    }
+  }
+}
@@ -0,0 +1,149 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.repository;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Book;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Category;
+import java.time.LocalDate;
+import java.util.List;
+import java.util.Optional;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class BookRepositoryTest {
+
+  private BookRepository repository;
+  private Book book1;
+  private Book book2;
+
+  @BeforeEach
+  void setUp() {
+    repository = new BookRepository();
+
+    book1 = Book.builder()
+        .isbn(1111111111111L)
+        .title("Book One")
+        .author("Author A")
+        .publisher("Pub")
+        .publicationDate(LocalDate.of(2020, 1, 1))
+        .price(10.0)
+        .quantity(2)
+        .categories(List.of(Category.FICTION))
+        .language("EN")
+        .build();
+
+    book2 = Book.builder()
+        .isbn(2222222222222L)
+        .title("Book Two")
+        .author("Author B")
+        .publisher("Pub")
+        .publicationDate(LocalDate.of(2021, 1, 1))
+        .price(20.0)
+        .quantity(0)
+        .categories(List.of(Category.HISTORY))
+        .language("FR")
+        .build();
+  }
+
+  @Test
+  @DisplayName("New repository should be empty")
+  void testNewRepositoryIsEmpty() {
+    assertTrue(repository.findAll().isEmpty());
+  }
+
+  @Nested
+  @DisplayName("Save operations")
+  class SaveOperations {
+
+    @Test
+    @DisplayName("Save should add a new book")
+    void testSave() {
+      Book saved = repository.save(book1);
+      assertEquals(1, repository.findAll().size());
+      assertEquals(book1.getIsbn(), saved.getIsbn());
+    }
+
+    @Test
+    @DisplayName("Save should replace existing book with same ISBN (idempotency)")
+    void testSaveReplacesExisting() {
+      repository.save(book1);
+      Book updated = Book.builder()
+          .isbn(book1.getIsbn())
+          .title("New title")
+          .author("Author A")
+          .publisher("Pub")
+          .publicationDate(LocalDate.of(2020, 1, 1))
+          .price(10.0)
+          .quantity(99)
+          .categories(List.of(Category.FICTION))
+          .language("EN")
+          .build();
+
+      repository.save(updated);
+
+      assertEquals(1, repository.findAll().size());
+      assertEquals(99, repository.findByIsbn(book1.getIsbn()).orElseThrow().getQuantity());
+      assertEquals("New title", repository.findByIsbn(book1.getIsbn()).orElseThrow().getTitle());
+    }
+  }
+
+  @Nested
+  @DisplayName("Find operations")
+  class FindOperations {
+
+    @BeforeEach
+    void seed() {
+      repository.save(book1);
+      repository.save(book2);
+    }
+
+    @Test
+    @DisplayName("findByIsbn returns the matching book")
+    void testFindByIsbn() {
+      Optional<Book> found = repository.findByIsbn(book1.getIsbn());
+      assertTrue(found.isPresent());
+      assertEquals(book1.getTitle(), found.get().getTitle());
+    }
+
+    @Test
+    @DisplayName("findByIsbn returns empty when not found")
+    void testFindByIsbnNotFound() {
+      assertTrue(repository.findByIsbn(99L).isEmpty());
+    }
+
+    @Test
+    @DisplayName("existsByIsbn returns true / false consistently")
+    void testExistsByIsbn() {
+      assertTrue(repository.existsByIsbn(book1.getIsbn()));
+      assertFalse(repository.existsByIsbn(99L));
+    }
+  }
+
+  @Nested
+  @DisplayName("Delete operations")
+  class DeleteOperations {
+
+    @BeforeEach
+    void seed() {
+      repository.save(book1);
+      repository.save(book2);
+    }
+
+    @Test
+    @DisplayName("delete should remove the specified book")
+    void testDelete() {
+      repository.delete(book1);
+      assertEquals(1, repository.findAll().size());
+      assertFalse(repository.existsByIsbn(book1.getIsbn()));
+    }
+
+    @Test
+    @DisplayName("deleteAll should clear the repository")
+    void testDeleteAll() {
+      repository.deleteAll();
+      assertTrue(repository.findAll().isEmpty());
+    }
+  }
+}
@@ -0,0 +1,152 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.usecase;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookDTO;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Book;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Category;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.BookAlreadyExistsException;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.BookNotFoundException;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.NotValidBookException;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.repository.BookRepository;
+import java.time.LocalDate;
+import java.util.List;
+import java.util.Optional;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class BookUseCaseTest {
+
+  @Mock
+  private BookRepository bookRepository;
+
+  @InjectMocks
+  private BookUseCase bookUseCase;
+
+  private BookInfo validInfo;
+  private Book validBook;
+
+  @BeforeEach
+  void setUp() {
+    validInfo = new BookInfo(
+        9780321125217L,
+        "DDD",
+        "Evans",
+        "Addison-Wesley",
+        LocalDate.of(2003, 8, 22),
+        54.99,
+        10,
+        List.of(Category.SCIENCE),
+        "desc",
+        "EN"
+    );
+    validBook = Book.builder()
+        .isbn(validInfo.isbn())
+        .title(validInfo.title())
+        .author(validInfo.author())
+        .publisher(validInfo.publisher())
+        .publicationDate(validInfo.publicationDate())
+        .price(validInfo.price())
+        .quantity(validInfo.quantity())
+        .categories(validInfo.categories())
+        .description(validInfo.description())
+        .language(validInfo.language())
+        .build();
+  }
+
+  @Nested
+  @DisplayName("registerBook tests")
+  class RegisterTests {
+
+    @Test
+    @DisplayName("Should register a new book and return its ISBN")
+    void testRegisterBook() throws NotValidBookException, BookAlreadyExistsException {
+      when(bookRepository.existsByIsbn(validInfo.isbn())).thenReturn(false);
+      when(bookRepository.save(any(Book.class))).thenReturn(validBook);
+
+      long isbn = bookUseCase.registerBook(validInfo);
+
+      assertEquals(validInfo.isbn(), isbn);
+      verify(bookRepository).existsByIsbn(validInfo.isbn());
+      verify(bookRepository).save(any(Book.class));
+    }
+
+    @Test
+    @DisplayName("Should reject invalid book information without touching the repository")
+    void testRegisterInvalidBook() {
+      BookInfo invalid = new BookInfo(0L, "", "", "", null, -1, -1, null, "", "");
+      assertThrows(NotValidBookException.class, () -> bookUseCase.registerBook(invalid));
+      verifyNoInteractions(bookRepository);
+    }
+
+    @Test
+    @DisplayName("Should reject duplicate ISBN")
+    void testRegisterDuplicate() {
+      when(bookRepository.existsByIsbn(validInfo.isbn())).thenReturn(true);
+      assertThrows(BookAlreadyExistsException.class, () -> bookUseCase.registerBook(validInfo));
+      verify(bookRepository).existsByIsbn(validInfo.isbn());
+      verify(bookRepository, never()).save(any(Book.class));
+    }
+  }
+
+  @Nested
+  @DisplayName("getBookByIsbn tests")
+  class GetByIdTests {
+
+    @Test
+    @DisplayName("Should return the BookDTO when ISBN exists")
+    void testGetById() throws BookNotFoundException {
+      when(bookRepository.findByIsbn(validInfo.isbn())).thenReturn(Optional.of(validBook));
+
+      BookDTO dto = bookUseCase.getBookByIsbn(validInfo.isbn());
+
+      assertEquals(validInfo.isbn(), dto.getIsbn());
+      assertEquals(validInfo.title(), dto.getTitle());
+    }
+
+    @Test
+    @DisplayName("Should throw when ISBN does not exist")
+    void testGetByIdNotFound() {
+      when(bookRepository.findByIsbn(99L)).thenReturn(Optional.empty());
+      assertThrows(BookNotFoundException.class, () -> bookUseCase.getBookByIsbn(99L));
+    }
+  }
+
+  @Nested
+  @DisplayName("getAllBooks tests")
+  class GetAllBooksTests {
+
+    @Test
+    @DisplayName("Should map every book returned by the repository to a DTO")
+    void testGetAllBooks() {
+      when(bookRepository.findAll()).thenReturn(List.of(validBook));
+
+      List<BookDTO> result = bookUseCase.getAllBooks();
+
+      assertEquals(1, result.size());
+      assertEquals(validBook.getIsbn(), result.getFirst().getIsbn());
+      assertEquals(validBook.getTitle(), result.getFirst().getTitle());
+      verify(bookRepository).findAll();
+    }
+
+    @Test
+    @DisplayName("Should return an empty list when no book is stored")
+    void testGetAllBooksWhenEmpty() {
+      when(bookRepository.findAll()).thenReturn(List.of());
+
+      List<BookDTO> result = bookUseCase.getAllBooks();
+
+      assertTrue(result.isEmpty());
+    }
+  }
+}
@@ -0,0 +1,167 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.book.validator;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.BookInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Category;
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.NotValidBookException;
+import java.time.LocalDate;
+import java.util.List;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class BookValidatorTest {
+
+  private BookInfo valid() {
+    return new BookInfo(
+        9780321125217L,
+        "Domain-Driven Design",
+        "Eric Evans",
+        "Addison-Wesley",
+        LocalDate.of(2003, 8, 22),
+        54.99,
+        10,
+        List.of(Category.SCIENCE),
+        "Tackling complexity in the heart of software",
+        "EN"
+    );
+  }
+
+  @Test
+  @DisplayName("Should accept a valid BookInfo")
+  void testValidBook() {
+    assertDoesNotThrow(() -> BookValidator.validate(valid()));
+  }
+
+  @Nested
+  @DisplayName("ISBN validation")
+  class IsbnTests {
+
+    @ParameterizedTest
+    @ValueSource(longs = {0L, -1L, -9999L})
+    @DisplayName("Should reject ISBN that is not strictly positive")
+    void testInvalidIsbn(long isbn) {
+      BookInfo info = new BookInfo(isbn, "T", "A", "P", LocalDate.now(), 1.0, 0, List.of(Category.SCIENCE), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.ISBN_MUST_BE_POSITIVE, ex.getMessage());
+    }
+  }
+
+  @Nested
+  @DisplayName("Title validation")
+  class TitleTests {
+
+    @ParameterizedTest
+    @ValueSource(strings = {"", " ", "\t", "\n"})
+    @DisplayName("Should reject blank title")
+    void testBlankTitle(String title) {
+      BookInfo info = new BookInfo(1L, title, "A", "P", LocalDate.now(), 1.0, 0, List.of(Category.SCIENCE), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.TITLE_CANNOT_BE_BLANK, ex.getMessage());
+    }
+
+    @Test
+    @DisplayName("Should reject null title")
+    void testNullTitle() {
+      BookInfo info = new BookInfo(1L, null, "A", "P", LocalDate.now(), 1.0, 0, List.of(Category.SCIENCE), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.TITLE_CANNOT_BE_BLANK, ex.getMessage());
+    }
+
+    @Test
+    @DisplayName("Should reject title longer than 255 characters")
+    void testTitleTooLong() {
+      String longTitle = "a".repeat(256);
+      BookInfo info = new BookInfo(1L, longTitle, "A", "P", LocalDate.now(), 1.0, 0, List.of(Category.SCIENCE), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.TITLE_TOO_LONG, ex.getMessage());
+    }
+  }
+
+  @Nested
+  @DisplayName("Author / Publisher validation")
+  class AuthorPublisherTests {
+
+    @ParameterizedTest
+    @ValueSource(strings = {"", " ", "\t"})
+    @DisplayName("Should reject blank author")
+    void testBlankAuthor(String author) {
+      BookInfo info = new BookInfo(1L, "T", author, "P", LocalDate.now(), 1.0, 0, List.of(Category.SCIENCE), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.AUTHOR_CANNOT_BE_BLANK, ex.getMessage());
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"", " ", "\t"})
+    @DisplayName("Should reject blank publisher")
+    void testBlankPublisher(String publisher) {
+      BookInfo info = new BookInfo(1L, "T", "A", publisher, LocalDate.now(), 1.0, 0, List.of(Category.SCIENCE), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.PUBLISHER_CANNOT_BE_BLANK, ex.getMessage());
+    }
+  }
+
+  @Nested
+  @DisplayName("Date / Price / Quantity validation")
+  class NumericTests {
+
+    @Test
+    @DisplayName("Should reject null publication date")
+    void testNullDate() {
+      BookInfo info = new BookInfo(1L, "T", "A", "P", null, 1.0, 0, List.of(Category.SCIENCE), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.PUBLICATION_DATE_REQUIRED, ex.getMessage());
+    }
+
+    @ParameterizedTest
+    @ValueSource(doubles = {0.0, -0.01, -10.0})
+    @DisplayName("Should reject non-positive price")
+    void testNonPositivePrice(double price) {
+      BookInfo info = new BookInfo(1L, "T", "A", "P", LocalDate.now(), price, 0, List.of(Category.SCIENCE), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.PRICE_MUST_BE_POSITIVE, ex.getMessage());
+    }
+
+    @ParameterizedTest
+    @ValueSource(ints = {-1, -100})
+    @DisplayName("Should reject negative quantity")
+    void testNegativeQuantity(int quantity) {
+      BookInfo info = new BookInfo(1L, "T", "A", "P", LocalDate.now(), 1.0, quantity, List.of(Category.SCIENCE), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.QUANTITY_MUST_BE_POSITIVE_OR_ZERO, ex.getMessage());
+    }
+  }
+
+  @Nested
+  @DisplayName("Categories / Language validation")
+  class MetadataTests {
+
+    @Test
+    @DisplayName("Should reject empty categories")
+    void testEmptyCategories() {
+      BookInfo info = new BookInfo(1L, "T", "A", "P", LocalDate.now(), 1.0, 0, List.of(), "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.CATEGORIES_REQUIRED, ex.getMessage());
+    }
+
+    @Test
+    @DisplayName("Should reject null categories")
+    void testNullCategories() {
+      BookInfo info = new BookInfo(1L, "T", "A", "P", LocalDate.now(), 1.0, 0, null, "", "EN");
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.CATEGORIES_REQUIRED, ex.getMessage());
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"", " ", "\t"})
+    @DisplayName("Should reject blank language")
+    void testBlankLanguage(String language) {
+      BookInfo info = new BookInfo(1L, "T", "A", "P", LocalDate.now(), 1.0, 0, List.of(Category.SCIENCE), "", language);
+      NotValidBookException ex = assertThrows(NotValidBookException.class, () -> BookValidator.validate(info));
+      assertEquals(BookValidator.LANGUAGE_CANNOT_BE_BLANK, ex.getMessage());
+    }
+  }
+}
@@ -0,0 +1,97 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.customer.converter;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.CustomerDTO;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.CustomerInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.entity.Customer;
+import java.util.UUID;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+@DisplayName("CustomerConverter Unit Tests")
+class CustomerConverterTest {
+
+  @Nested
+  @DisplayName("toDomain() method tests")
+  class ToDomainTests {
+
+    @Test
+    @DisplayName("Should convert CustomerInfo to Customer domain object with loyalty points initialized to 0")
+    void shouldConvertCustomerInfoToDomain() {
+      // Given
+      CustomerInfo customerInfo = new CustomerInfo("John", "Doe", "0123456789");
+
+      // When
+      Customer result = CustomerConverter.toDomain(customerInfo);
+
+      // Then
+      assertNotNull(result);
+      assertEquals(customerInfo.firstName(), result.getFirstName());
+      assertEquals(customerInfo.lastName(), result.getLastName());
+      assertEquals(customerInfo.phoneNumber(), result.getPhoneNumber());
+      assertEquals(0, result.getLoyaltyPoints());
+    }
+  }
+
+  @Nested
+  @DisplayName("toDTO() method tests")
+  class ToDTOTests {
+
+    @Test
+    @DisplayName("Should convert Customer domain object to CustomerDTO with all fields mapped correctly")
+    void shouldConvertCustomerToDTO() {
+      Customer customer = Customer.builder()
+          .id(UUID.randomUUID())
+          .firstName("Jane")
+          .lastName("Smith")
+          .phoneNumber("9876543210")
+          .loyaltyPoints(100)
+          .build();
+
+      CustomerDTO result = CustomerConverter.toDTO(customer);
+
+      assertNotNull(result);
+      assertEquals(customer.getId(), result.getId());
+      assertEquals(customer.getFirstName(), result.getFirstName());
+      assertEquals(customer.getLastName(), result.getLastName());
+      assertEquals(customer.getPhoneNumber(), result.getPhoneNumber());
+      assertEquals(customer.getLoyaltyPoints(), result.getLoyaltyPoints());
+    }
+  }
+
+  @Test
+  @DisplayName("Should handle null values properly when converting between objects")
+  void shouldHandleNullValuesGracefully() {
+    Customer customer = Customer.builder()
+        .id(UUID.randomUUID())
+        .firstName(null)
+        .lastName("NullTest")
+        .phoneNumber(null)
+        .loyaltyPoints(50)
+        .build();
+
+    CustomerDTO result = CustomerConverter.toDTO(customer);
+
+    assertNotNull(result);
+    assertNull(result.getFirstName());
+    assertEquals("NullTest", result.getLastName());
+    assertNull(result.getPhoneNumber());
+  }
+
+  @Test
+  @DisplayName("Should preserve empty string values during conversion")
+  void shouldPreserveEmptyStrings() {
+    CustomerInfo customerInfo = new CustomerInfo("", "", "");
+
+    Customer domainResult = CustomerConverter.toDomain(customerInfo);
+    CustomerDTO dtoResult = CustomerConverter.toDTO(domainResult);
+
+    assertEquals("", dtoResult.getFirstName());
+    assertEquals("", dtoResult.getLastName());
+    assertEquals("", dtoResult.getPhoneNumber());
+  }
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
RKaraMos_EVO	092a020059	ajout du scenario cucumber et du README	2026-06-14 15:22:36 +02:00
RKaraMos_EVO	8708686994	ajout du usecase pour les livres + tests	2026-06-14 15:22:29 +02:00
RKaraMos_EVO	a595750194	ajout du repository en memoire + tests	2026-06-12 23:32:35 +02:00
RKaraMos_EVO	00e90aaa0c	ajout du converter Info-entity-DTO + tests	2026-06-12 23:32:26 +02:00
RKaraMos_EVO	009ac7f5f7	ajout du validator pour les livres + tests	2026-06-12 23:32:17 +02:00
RKaraMos_EVO	9080b8e67e	ajout entity Book et BookDTO + tests	2026-06-12 23:30:58 +02:00
RKaraMos_EVO	179f259c3d	ajout des exceptions du module book et leurs tests	2026-06-12 23:30:45 +02:00
RKaraMos_EVO	1aa83b0911	ajout enum Category et record BookInfo	2026-06-11 14:23:15 +02:00
RKaraMos_EVO	abbd3ee95d	ajout du module customer fourni par le prof	2026-06-11 14:22:59 +02:00
RKaraMos_EVO	efa6fc49eb	ajout du pom et du gitignore pour le module	2026-06-11 14:22:13 +02:00
Adrien DICK	4008ef4a9b	Merge pull request 'Remise au propre du projet' (#1 ) from dick into main Reviewed-on: #1	2026-06-11 10:34:19 +02:00
Adrien DICK	b99dcd8592	✨ Get api/books pour la page catalogue	2026-06-11 04:32:20 -04:00
Adrien DICK	4e1a0b24f4	🎨 Remise au propre	2026-06-10 16:24:37 -04:00