ajout de la connection via facebook et du captcha

backend/tests/facebookLogin.test.js

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+// Identifiants factices posés avant le chargement de passport : la stratégie
+// Facebook est ainsi enregistrée même sans vraie app Meta configurée.
+process.env.FACEBOOK_APP_ID = "test-app-id";
+process.env.FACEBOOK_APP_SECRET = "test-app-secret";
+
+const request = require("supertest");
+const app = require("../src/app");
+const prisma = require("../src/config/prisma");
+const mailer = require("../src/config/mailer");
+const { passport } = require("../src/config/passport");
+
+jest.mock("../src/config/mailer", () => ({ sendMail: jest.fn() }));
+
+const EMAIL = "facebook-login-test@test.local";
+const EMAIL_EXISTANT = "facebook-link-test@test.local";
+
+function profil(overrides = {}) {
+  return {
+    id: "sim-facebook-id-987654",
+    displayName: "Léa Durand",
+    name: { givenName: "Léa", familyName: "Durand" },
+    emails: [{ value: EMAIL }],
+    photos: [{ value: "https://example.test/fb.png" }],
+    ...overrides,
+  };
+}
+
+// Rejoue le callback de la strategie Facebook sans sortir sur le reseau.
+function verifierProfilFacebook(profile) {
+  const strategy = passport._strategy("facebook");
+  return new Promise((resolve, reject) => {
+    strategy._verify("access-token", "refresh-token", profile, (err, user, info) => {
+      if (err) reject(err);
+      else resolve({ user, info });
+    });
+  });
+}
+
+async function cleanup() {
+  await prisma.user.deleteMany({ where: { email: { in: [EMAIL, EMAIL_EXISTANT] } } });
+}
+
+beforeAll(cleanup);
+afterAll(async () => {
+  await cleanup();
+  await prisma.$disconnect();
+});
+
+describe("Connexion Facebook", () => {
+  beforeEach(() => jest.clearAllMocks());
+
+  test("la route de depart redirige vers Facebook", async () => {
+    const res = await request(app).get("/api/auth/facebook");
+
+    expect(res.status).toBe(302);
+    const url = new URL(res.headers.location);
+    expect(url.hostname).toBe("www.facebook.com");
+    expect(url.searchParams.get("client_id")).toBe("test-app-id");
+    expect(url.searchParams.get("scope")).toBe("email");
+    expect(url.searchParams.get("redirect_uri")).toMatch(/\/api\/auth\/facebook\/callback$/);
+  });
+
+  test("un premier passage cree un compte FACEBOOK sans mot de passe", async () => {
+    mailer.sendMail.mockResolvedValue(true);
+
+    const { user } = await verifierProfilFacebook(profil());
+
+    expect(user.provider).toBe("FACEBOOK");
+    expect(user.providerId).toBe("sim-facebook-id-987654");
+    expect(user.password).toBeNull();
+    expect(user.isEmailVerified).toBe(true);
+    expect(user.firstname).toBe("Léa");
+
+    expect(mailer.sendMail).toHaveBeenCalledTimes(1);
+    expect(mailer.sendMail.mock.calls[0][0].html).toContain("créé avec Facebook");
+  });
+
+  test("un second passage reconnait le compte sans renvoyer d email", async () => {
+    const { user } = await verifierProfilFacebook(profil());
+
+    expect(user.email).toBe(EMAIL);
+    expect(mailer.sendMail).not.toHaveBeenCalled();
+  });
+
+  test("un compte existant avec le meme email est rattache a Facebook", async () => {
+    await prisma.user.create({
+      data: { firstname: "Paul", lastname: "Martin", email: EMAIL_EXISTANT, password: "hash", isEmailVerified: false },
+    });
+
+    const { user } = await verifierProfilFacebook(
+      profil({ id: "sim-facebook-id-link", emails: [{ value: EMAIL_EXISTANT }] })
+    );
+
+    expect(user.provider).toBe("FACEBOOK");
+    expect(user.isEmailVerified).toBe(true);
+    // Le mot de passe existant est conserve.
+    expect(user.password).toBe("hash");
+  });
+
+  test("un compte Facebook sans email est refuse", async () => {
+    const { user, info } = await verifierProfilFacebook(profil({ id: "sim-sans-email", emails: undefined }));
+
+    expect(user).toBe(false);
+    expect(info.message).toMatch(/Facebook/);
+  });
+
+  test("la connexion par mot de passe oriente vers le bouton Facebook", async () => {
+    const res = await request(app).post("/api/auth/login").send({ email: EMAIL, password: "PeuImporte123" });
+
+    expect(res.status).toBe(401);
+    expect(res.body.message).toMatch(/connexion Facebook/);
+  });
+});