test: vitest setup + auth/login/cookie banner tests

DataSentinel/src/__tests__/AuthContext.test.jsx

@@ -0,0 +1,49 @@
+/* Tests du contexte d'authentification : login / logout */
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
+import { renderHook, act } from '@testing-library/react';
+import { AuthProvider, useAuth } from '../context/AuthContext';
+import * as api from '../services/api';
+
+describe('AuthContext', () => {
+  beforeEach(() => {
+    localStorage.clear();
+    vi.restoreAllMocks();
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  function wrapper({ children }) {
+    return <AuthProvider>{children}</AuthProvider>;
+  }
+
+  it('login renseigne l\'utilisateur, logout le vide', async () => {
+    const fakeUser = { username: 'bob', role: 'Consultant' };
+    vi.spyOn(api, 'login').mockResolvedValue(fakeUser);
+    const clearSpy = vi.spyOn(api, 'clearToken').mockImplementation(() => {});
+
+    const { result } = renderHook(() => useAuth(), { wrapper });
+
+    expect(result.current.user).toBeNull();
+    expect(result.current.isAuthenticated).toBe(false);
+
+    await act(async () => {
+      await result.current.login('bob', 'pwd');
+    });
+
+    expect(result.current.user).toEqual(fakeUser);
+    expect(result.current.isAuthenticated).toBe(true);
+    /* L'utilisateur est persisté dans le localStorage */
+    expect(JSON.parse(localStorage.getItem('ds_user'))).toEqual(fakeUser);
+
+    act(() => {
+      result.current.logout();
+    });
+
+    expect(result.current.user).toBeNull();
+    expect(result.current.isAuthenticated).toBe(false);
+    expect(localStorage.getItem('ds_user')).toBeNull();
+    expect(clearSpy).toHaveBeenCalled();
+  });
+});