diff --git a/.gitea/workflows/test.yml b/.gitea/workflows/test.yml
index 6b3b830..d2a8d16 100644
--- a/.gitea/workflows/test.yml
+++ b/.gitea/workflows/test.yml
@@ -68,3 +68,12 @@ jobs:
           POSTGRES_PASS: test
           POSTGRES_DB: polympr_test
         run: deno task test:integration
+
+      - name: Run e2e tests
+        env:
+          POSTGRES_HOST: 127.0.0.1
+          POSTGRES_PORT: 5432
+          POSTGRES_USER: test
+          POSTGRES_PASS: test
+          POSTGRES_DB: polympr_test
+        run: deno task test:e2e
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..d2a8d16
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,79 @@
+name: "Tests"
+
+on:
+  pull_request:
+    branches:
+      - main
+      - develop
+  push:
+    branches:
+      - develop
+
+jobs:
+  unit:
+    name: "Unit tests"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: denoland/setup-deno@v2
+        with:
+          deno-version: v2.x
+
+      - name: Install dependencies
+        run: deno install
+
+      - name: Run unit tests
+        run: deno task test:unit
+
+  integration:
+    name: "Integration tests"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+
+      - uses: denoland/setup-deno@v2
+        with:
+          deno-version: v2.x
+
+      - name: Start postgres
+        run: |
+          sudo apt-get update -qq && sudo apt-get install -y -qq postgresql > /dev/null
+          PG_VER=$(ls /etc/postgresql/)
+          sudo sed -i "s/^#*listen_addresses\s*=.*/listen_addresses = '127.0.0.1'/" /etc/postgresql/$PG_VER/main/postgresql.conf
+          echo "host all all 127.0.0.1/32 md5" | sudo tee -a /etc/postgresql/$PG_VER/main/pg_hba.conf
+          sudo pg_ctlcluster $PG_VER main restart
+          until sudo -u postgres pg_isready -h 127.0.0.1; do sleep 1; done
+          sudo -u postgres psql -c "CREATE USER test WITH PASSWORD 'test';"
+          sudo -u postgres psql -c "CREATE DATABASE polympr_test OWNER test;"
+          sudo -u postgres psql -d polympr_test -c "GRANT ALL ON SCHEMA public TO test;"
+
+      - name: Apply migrations
+        run: |
+          sed 's/--> statement-breakpoint/;/g' databases/migrations/0000_square_jetstream.sql | \
+            PGPASSWORD=test psql -h 127.0.0.1 -U test -d polympr_test
+
+      - name: Install dependencies
+        run: npm install --ignore-scripts && deno install
+
+      - name: Run integration tests
+        env:
+          POSTGRES_HOST: 127.0.0.1
+          POSTGRES_PORT: 5432
+          POSTGRES_USER: test
+          POSTGRES_PASS: test
+          POSTGRES_DB: polympr_test
+        run: deno task test:integration
+
+      - name: Run e2e tests
+        env:
+          POSTGRES_HOST: 127.0.0.1
+          POSTGRES_PORT: 5432
+          POSTGRES_USER: test
+          POSTGRES_PASS: test
+          POSTGRES_DB: polympr_test
+        run: deno task test:e2e
diff --git a/deno.json b/deno.json
index b3d8c09..ed7422e 100644
--- a/deno.json
+++ b/deno.json
@@ -13,6 +13,7 @@
     "test": "deno test -A --no-check tests/",
     "test:unit": "deno test -A --no-check tests/unit/",
     "test:integration": "deno test -A --no-check tests/integration/",
+    "test:e2e": "deno test -A --no-check tests/e2e/",
     "migrate": "node_modules/.bin/drizzle-kit migrate"
   },
   "lint": {
diff --git a/tests/e2e/students_test.ts b/tests/e2e/students_test.ts
new file mode 100644
index 0000000..07de874
--- /dev/null
+++ b/tests/e2e/students_test.ts
@@ -0,0 +1,285 @@
+// #109 - E2E tests for /students endpoints
+// Appelle les handlers Fresh directement avec un vrai contexte + vraie DB
+
+import { assertEquals, assertExists } from "@std/assert";
+import {
+  makeContextWithAffiliation,
+  makeEmployeeContext,
+  makeGetRequest,
+  makeJsonRequest,
+} from "../helpers/handler.ts";
+import {
+  seedPromotions,
+  seedStudents,
+  truncateAll,
+} from "../helpers/db_integration.ts";
+import { handler as studentsHandler } from "$apps/students/api/students.ts";
+import { handler as studentHandler } from "$apps/students/api/students/[numEtud].ts";
+
+// --- GET /students ---
+
+Deno.test({
+  name: "e2e students: GET /students returns all students as employee",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "PEIP1-2024" }]);
+    await seedStudents([
+      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
+      { nom: "Martin", prenom: "Alice", idPromo: "PEIP1-2024" },
+    ]);
+
+    const req = makeGetRequest("/students");
+    const ctx = makeEmployeeContext();
+    const res = await studentsHandler.GET!(req, ctx);
+
+    assertEquals(res.status, 200);
+    const body = await res.json();
+    assertEquals(body.length, 2);
+    assertExists(body.find((s: { nom: string }) => s.nom === "Dupont"));
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "e2e students: GET /students returns empty array for non-employee",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "PEIP1-2024" }]);
+    await seedStudents([
+      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
+    ]);
+
+    const req = makeGetRequest("/students");
+    const ctx = makeContextWithAffiliation("student");
+    const res = await studentsHandler.GET!(req, ctx);
+
+    assertEquals(res.status, 200);
+    const body = await res.json();
+    assertEquals(body.length, 0);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "e2e students: GET /students?idPromo filters by promotion",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "PEIP1-2024" }, { id: "PEIP2-2024" }]);
+    await seedStudents([
+      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
+      { nom: "Martin", prenom: "Alice", idPromo: "PEIP1-2024" },
+      { nom: "Durand", prenom: "Claire", idPromo: "PEIP2-2024" },
+    ]);
+
+    const req = makeGetRequest("/students", { idPromo: "PEIP1-2024" });
+    const ctx = makeEmployeeContext();
+    const res = await studentsHandler.GET!(req, ctx);
+
+    assertEquals(res.status, 200);
+    const body = await res.json();
+    assertEquals(body.length, 2);
+    assertEquals(body.every((s: { idPromo: string }) => s.idPromo === "PEIP1-2024"), true);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+// --- POST /students ---
+
+Deno.test({
+  name: "e2e students: POST /students creates a student (201)",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }]);
+
+    const req = makeJsonRequest("/students", "POST", {
+      nom: "Leroy",
+      prenom: "Paul",
+      idPromo: "INFO3-2024",
+    });
+    const ctx = makeEmployeeContext();
+    const res = await studentsHandler.POST!(req, ctx);
+
+    assertEquals(res.status, 201);
+    const body = await res.json();
+    assertExists(body.numEtud);
+    assertEquals(body.nom, "Leroy");
+    assertEquals(body.idPromo, "INFO3-2024");
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "e2e students: POST /students 403 for non-employee",
+  async fn() {
+    await truncateAll();
+
+    const req = makeJsonRequest("/students", "POST", {
+      nom: "Test",
+      prenom: "User",
+      idPromo: "PEIP1-2024",
+    });
+    const ctx = makeContextWithAffiliation("student");
+    const res = await studentsHandler.POST!(req, ctx);
+
+    assertEquals(res.status, 403);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "e2e students: POST /students 400 when missing required fields",
+  async fn() {
+    await truncateAll();
+
+    const req = makeJsonRequest("/students", "POST", { nom: "Leroy" });
+    const ctx = makeEmployeeContext();
+    const res = await studentsHandler.POST!(req, ctx);
+
+    assertEquals(res.status, 400);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+// --- GET /students/:numEtud ---
+
+Deno.test({
+  name: "e2e students: GET /students/:numEtud returns student",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }]);
+    const [s] = await seedStudents([
+      { nom: "Bernard", prenom: "Lucie", idPromo: "INFO3-2024" },
+    ]);
+
+    const req = makeGetRequest(`/students/${s.numEtud}`);
+    const ctx = makeEmployeeContext({ numEtud: String(s.numEtud) });
+    const res = await studentHandler.GET!(req, ctx);
+
+    assertEquals(res.status, 200);
+    const body = await res.json();
+    assertEquals(body.numEtud, s.numEtud);
+    assertEquals(body.nom, "Bernard");
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "e2e students: GET /students/:numEtud 404 when not found",
+  async fn() {
+    await truncateAll();
+
+    const req = makeGetRequest("/students/999999");
+    const ctx = makeEmployeeContext({ numEtud: "999999" });
+    const res = await studentHandler.GET!(req, ctx);
+
+    assertEquals(res.status, 404);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "e2e students: GET /students/:numEtud 403 for non-employee",
+  async fn() {
+    await truncateAll();
+
+    const req = makeGetRequest("/students/12345");
+    const ctx = makeContextWithAffiliation("student", { numEtud: "12345" });
+    const res = await studentHandler.GET!(req, ctx);
+
+    assertEquals(res.status, 403);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+// --- PUT /students/:numEtud ---
+
+Deno.test({
+  name: "e2e students: PUT /students/:numEtud updates student",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }, { id: "INFO4-2024" }]);
+    const [s] = await seedStudents([
+      { nom: "Petit", prenom: "Hugo", idPromo: "INFO3-2024" },
+    ]);
+
+    const req = makeJsonRequest(`/students/${s.numEtud}`, "PUT", {
+      nom: "Grand",
+      prenom: "Hugo",
+      idPromo: "INFO4-2024",
+    });
+    const ctx = makeEmployeeContext({ numEtud: String(s.numEtud) });
+    const res = await studentHandler.PUT!(req, ctx);
+
+    assertEquals(res.status, 200);
+    const body = await res.json();
+    assertEquals(body.nom, "Grand");
+    assertEquals(body.idPromo, "INFO4-2024");
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "e2e students: PUT /students/:numEtud 404 when not found",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }]);
+
+    const req = makeJsonRequest("/students/999999", "PUT", {
+      nom: "Ghost",
+      prenom: "Ghost",
+      idPromo: "INFO3-2024",
+    });
+    const ctx = makeEmployeeContext({ numEtud: "999999" });
+    const res = await studentHandler.PUT!(req, ctx);
+
+    assertEquals(res.status, 404);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+// --- DELETE /students/:numEtud ---
+
+Deno.test({
+  name: "e2e students: DELETE /students/:numEtud returns 204",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }]);
+    const [s] = await seedStudents([
+      { nom: "Thomas", prenom: "Eva", idPromo: "INFO3-2024" },
+    ]);
+
+    const req = makeGetRequest(`/students/${s.numEtud}`);
+    const ctx = makeEmployeeContext({ numEtud: String(s.numEtud) });
+    const res = await studentHandler.DELETE!(req, ctx);
+
+    assertEquals(res.status, 204);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "e2e students: DELETE /students/:numEtud 404 when not found",
+  async fn() {
+    await truncateAll();
+
+    const req = makeGetRequest("/students/999999");
+    const ctx = makeEmployeeContext({ numEtud: "999999" });
+    const res = await studentHandler.DELETE!(req, ctx);
+
+    assertEquals(res.status, 404);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
diff --git a/tests/helpers/handler.ts b/tests/helpers/handler.ts
new file mode 100644
index 0000000..17aae24
--- /dev/null
+++ b/tests/helpers/handler.ts
@@ -0,0 +1,88 @@
+// Helper pour les tests E2E — appel direct des handlers Fresh
+// sans lancer de serveur HTTP
+
+import { FreshContext } from "$fresh/server.ts";
+import { AuthenticatedState } from "$root/defaults/interfaces.ts";
+import { CasContent } from "$root/defaults/interfaces.ts";
+
+const BASE_EMPLOYEE_SESSION: CasContent = {
+  amuCampus: "",
+  amuComposante: "",
+  amuDateValidation: "",
+  coGroup: "",
+  eduPersonPrimaryAffiliation: "employee",
+  eduPersonPrincipalName: "test.user@polytech.fr",
+  mail: "test.user@polytech.fr",
+  displayName: "Test User",
+  givenName: "Test",
+  memberOf: [],
+  sn: "User",
+  supannCivilite: "M.",
+  supannEntiteAffectation: "",
+  supannEtuAnneeInscription: "",
+  supannEtuEtape: "",
+  uid: "test.user",
+};
+
+/**
+ * Crée un FreshContext mock authentifié en tant qu'employee.
+ */
+export function makeEmployeeContext(
+  params: Record<string, string> = {},
+): FreshContext<AuthenticatedState> {
+  return {
+    params,
+    state: {
+      isAuthenticated: true,
+      session: { ...BASE_EMPLOYEE_SESSION },
+      availablePages: {},
+    },
+    render: () => Promise.resolve(new Response()),
+    renderNotFound: () => Promise.resolve(new Response(null, { status: 404 })),
+    next: () => Promise.resolve(new Response()),
+  } as unknown as FreshContext<AuthenticatedState>;
+}
+
+/**
+ * Crée un FreshContext mock avec un affiliation personnalisée.
+ */
+export function makeContextWithAffiliation(
+  affiliation: string,
+  params: Record<string, string> = {},
+): FreshContext<AuthenticatedState> {
+  const ctx = makeEmployeeContext(params);
+  (ctx.state as AuthenticatedState).session.eduPersonPrimaryAffiliation =
+    affiliation;
+  return ctx;
+}
+
+/**
+ * Crée une Request GET simple.
+ */
+export function makeGetRequest(
+  path: string,
+  searchParams?: Record<string, string>,
+): Request {
+  const url = new URL(`http://localhost${path}`);
+  if (searchParams) {
+    for (const [k, v] of Object.entries(searchParams)) {
+      url.searchParams.set(k, v);
+    }
+  }
+  return new Request(url.toString());
+}
+
+/**
+ * Crée une Request POST/PUT avec un corps JSON.
+ */
+export function makeJsonRequest(
+  path: string,
+  method: string,
+  body: unknown,
+): Request {
+  return new Request(`http://localhost${path}`, {
+    method,
+    headers: { "content-type": "application/json" },
+    body: JSON.stringify(body),
+  });
+}
diff --git a/tests/integration/students_test.ts b/tests/integration/students_test.ts
new file mode 100644
index 0000000..bb53d6f
--- /dev/null
+++ b/tests/integration/students_test.ts
@@ -0,0 +1,173 @@
+// #109 - Integration tests for /students endpoints
+// Teste les opérations DB directement avec une vraie base de données
+
+import { assertEquals, assertExists } from "@std/assert";
+import {
+  seedPromotions,
+  seedStudents,
+  testDb,
+  truncateAll,
+} from "../helpers/db_integration.ts";
+import { students } from "$root/databases/schema.ts";
+import { eq } from "npm:drizzle-orm@0.45.2";
+
+Deno.test({
+  name: "integration students: list all students",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "PEIP1-2024" }]);
+    await seedStudents([
+      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
+      { nom: "Martin", prenom: "Alice", idPromo: "PEIP1-2024" },
+    ]);
+
+    const rows = await testDb.select().from(students);
+    assertEquals(rows.length, 2);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration students: filter by idPromo",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "PEIP1-2024" }, { id: "PEIP2-2024" }]);
+    await seedStudents([
+      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
+      { nom: "Martin", prenom: "Alice", idPromo: "PEIP1-2024" },
+      { nom: "Durand", prenom: "Claire", idPromo: "PEIP2-2024" },
+    ]);
+
+    const rows = await testDb
+      .select()
+      .from(students)
+      .where(eq(students.idPromo, "PEIP1-2024"));
+    assertEquals(rows.length, 2);
+    assertEquals(rows.every((s) => s.idPromo === "PEIP1-2024"), true);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration students: create and retrieve by numEtud",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }]);
+
+    const [created] = await testDb
+      .insert(students)
+      .values({ nom: "Leroy", prenom: "Paul", idPromo: "INFO3-2024" })
+      .returning();
+
+    assertExists(created.numEtud);
+
+    const row = await testDb
+      .select()
+      .from(students)
+      .where(eq(students.numEtud, created.numEtud))
+      .then((r) => r[0] ?? null);
+
+    assertExists(row);
+    assertEquals(row.nom, "Leroy");
+    assertEquals(row.idPromo, "INFO3-2024");
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration students: get by numEtud returns null when not found",
+  async fn() {
+    await truncateAll();
+
+    const row = await testDb
+      .select()
+      .from(students)
+      .where(eq(students.numEtud, 999999))
+      .then((r) => r[0] ?? null);
+
+    assertEquals(row, null);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration students: update student fields",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }, { id: "INFO4-2024" }]);
+    const [s] = await seedStudents([
+      { nom: "Petit", prenom: "Hugo", idPromo: "INFO3-2024" },
+    ]);
+
+    const [updated] = await testDb
+      .update(students)
+      .set({ nom: "Grand", idPromo: "INFO4-2024" })
+      .where(eq(students.numEtud, s.numEtud))
+      .returning();
+
+    assertEquals(updated.nom, "Grand");
+    assertEquals(updated.idPromo, "INFO4-2024");
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration students: delete student",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }]);
+    const [s] = await seedStudents([
+      { nom: "Thomas", prenom: "Eva", idPromo: "INFO3-2024" },
+    ]);
+
+    await testDb.delete(students).where(eq(students.numEtud, s.numEtud));
+
+    const row = await testDb
+      .select()
+      .from(students)
+      .where(eq(students.numEtud, s.numEtud))
+      .then((r) => r[0] ?? null);
+
+    assertEquals(row, null);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration students: update non-existent student returns empty",
+  async fn() {
+    await truncateAll();
+
+    const result = await testDb
+      .update(students)
+      .set({ nom: "Ghost" })
+      .where(eq(students.numEtud, 999999))
+      .returning();
+
+    assertEquals(result.length, 0);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration students: delete non-existent student returns empty",
+  async fn() {
+    await truncateAll();
+
+    const result = await testDb
+      .delete(students)
+      .where(eq(students.numEtud, 999999))
+      .returning();
+
+    assertEquals(result.length, 0);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
diff --git a/tests/unit/students_test.ts b/tests/unit/students_test.ts
new file mode 100644
index 0000000..2b51029
--- /dev/null
+++ b/tests/unit/students_test.ts
@@ -0,0 +1,201 @@
+// #109 - Unit tests for /students endpoints
+// Tests purs : fixtures, mock API, mock DB — aucun appel réseau réel
+
+import { assertEquals, assertExists } from "@std/assert";
+import { getFetchCalls, mockFetch, restoreFetch } from "../helpers/api_mock.ts";
+import { createMockDb } from "../helpers/db_mock.ts";
+import { type Student, students } from "../helpers/fixtures.ts";
+
+// --- Fixtures ---
+
+Deno.test("students: fixtures have correct shape", () => {
+  assertEquals(students.length, 3);
+  assertEquals(typeof students[0].numEtud, "number");
+  assertEquals(typeof students[0].nom, "string");
+  assertEquals(typeof students[0].prenom, "string");
+  assertEquals(typeof students[0].idPromo, "string");
+});
+
+Deno.test("students: two students belong to the same promo", () => {
+  const promo4 = students.filter((s) => s.idPromo === "4AFISE25/26");
+  assertEquals(promo4.length, 2);
+});
+
+// --- Mock API - GET /students ---
+
+Deno.test("mock API: GET /students returns list", async () => {
+  mockFetch({ "/students": students });
+  try {
+    const res = await fetch("http://localhost/api/students");
+    assertEquals(res.status, 200);
+    const data: Student[] = await res.json();
+    assertEquals(data.length, 3);
+    assertExists(data.find((s) => s.nom === "Dupont"));
+  } finally {
+    restoreFetch();
+  }
+});
+
+Deno.test("mock API: GET /students?idPromo filters by promo", async () => {
+  const filtered = students.filter((s) => s.idPromo === "4AFISE25/26");
+  mockFetch({ "/students": filtered });
+  try {
+    const res = await fetch(
+      "http://localhost/api/students?idPromo=4AFISE25/26",
+    );
+    const data: Student[] = await res.json();
+    assertEquals(data.length, 2);
+    assertEquals(data.every((s) => s.idPromo === "4AFISE25/26"), true);
+  } finally {
+    restoreFetch();
+  }
+});
+
+Deno.test("mock API: GET /students/:numEtud returns one student", async () => {
+  mockFetch({ "/students/21212006": students[0] });
+  try {
+    const res = await fetch("http://localhost/api/students/21212006");
+    assertEquals(res.status, 200);
+    const data: Student = await res.json();
+    assertEquals(data.numEtud, 21212006);
+    assertEquals(data.nom, "Dupont");
+  } finally {
+    restoreFetch();
+  }
+});
+
+Deno.test("mock API: GET /students/:numEtud 404 when not found", async () => {
+  mockFetch({ "/students/99999": { status: 404, body: { error: "Ressource introuvable" } } });
+  try {
+    const res = await fetch("http://localhost/api/students/99999");
+    assertEquals(res.status, 404);
+  } finally {
+    restoreFetch();
+  }
+});
+
+Deno.test("mock API: POST /students creates student", async () => {
+  const newStudent = students[0];
+  mockFetch({ "/students": { method: "POST", status: 201, body: newStudent } });
+  try {
+    const res = await fetch("http://localhost/api/students", {
+      method: "POST",
+      headers: { "content-type": "application/json" },
+      body: JSON.stringify({ nom: "Dupont", prenom: "Jean", idPromo: "4AFISE25/26" }),
+    });
+    assertEquals(res.status, 201);
+    const data: Student = await res.json();
+    assertEquals(data.nom, "Dupont");
+  } finally {
+    restoreFetch();
+  }
+});
+
+Deno.test("mock API: PUT /students/:numEtud updates student", async () => {
+  const updated = { ...students[0], nom: "Dupont-Modifié" };
+  mockFetch({ "/students/21212006": { method: "PUT", status: 200, body: updated } });
+  try {
+    const res = await fetch("http://localhost/api/students/21212006", {
+      method: "PUT",
+      headers: { "content-type": "application/json" },
+      body: JSON.stringify({ nom: "Dupont-Modifié", prenom: "Jean", idPromo: "4AFISE25/26" }),
+    });
+    assertEquals(res.status, 200);
+    const data: Student = await res.json();
+    assertEquals(data.nom, "Dupont-Modifié");
+  } finally {
+    restoreFetch();
+  }
+});
+
+Deno.test("mock API: DELETE /students/:numEtud returns 204", async () => {
+  mockFetch({ "/students/21212006": { method: "DELETE", status: 204 } });
+  try {
+    const res = await fetch("http://localhost/api/students/21212006", {
+      method: "DELETE",
+    });
+    assertEquals(res.status, 204);
+  } finally {
+    restoreFetch();
+  }
+});
+
+Deno.test("mock API: POST /students 400 on missing fields", async () => {
+  mockFetch({ "/students": { method: "POST", status: 400 } });
+  try {
+    const res = await fetch("http://localhost/api/students", {
+      method: "POST",
+      headers: { "content-type": "application/json" },
+      body: JSON.stringify({ nom: "Test" }),
+    });
+    assertEquals(res.status, 400);
+  } finally {
+    restoreFetch();
+  }
+});
+
+// --- Mock DB ---
+
+Deno.test("mock DB: find student by numEtud", () => {
+  const db = createMockDb({ tables: { students: [...students] } });
+  const s = db.findOne<Student>("students", (r) => r.numEtud === 21212006);
+  assertExists(s);
+  assertEquals(s.nom, "Dupont");
+});
+
+Deno.test("mock DB: filter students by idPromo", () => {
+  const db = createMockDb({ tables: { students: [...students] } });
+  const rows = db.findMany<Student>(
+    "students",
+    (s) => s.idPromo === "4AFISE25/26",
+  );
+  assertEquals(rows.length, 2);
+});
+
+Deno.test("mock DB: insert student increments count", () => {
+  const db = createMockDb({ tables: { students: [...students] } });
+  db.insert<Student>("students", {
+    numEtud: 21212099,
+    nom: "Test",
+    prenom: "Ing",
+    idPromo: "4AFISE25/26",
+  });
+  assertEquals(db.getTable("students").length, 4);
+});
+
+Deno.test("mock DB: update student nom", () => {
+  const db = createMockDb({ tables: { students: [...students] } });
+  const count = db.updateWhere<Student>(
+    "students",
+    (s) => s.numEtud === 21212006,
+    { nom: "Nouveau" },
+  );
+  assertEquals(count, 1);
+  assertEquals(
+    db.findOne<Student>("students", (s) => s.numEtud === 21212006)?.nom,
+    "Nouveau",
+  );
+});
+
+Deno.test("mock DB: delete student removes exactly one", () => {
+  const db = createMockDb({ tables: { students: [...students] } });
+  const count = db.deleteWhere<Student>(
+    "students",
+    (s) => s.numEtud === 21212006,
+  );
+  assertEquals(count, 1);
+  assertEquals(db.getTable("students").length, 2);
+});
+
+Deno.test("mock API: getFetchCalls tracks student requests", async () => {
+  mockFetch({ "/students": students });
+  try {
+    await fetch("http://localhost/api/students");
+    await fetch("http://localhost/api/students?idPromo=4AFISE25/26");
+    const calls = getFetchCalls();
+    assertEquals(calls.length, 2);
+    assertEquals(calls[0].method, "GET");
+  } finally {
+    restoreFetch();
+  }
+});