helpyourneighbour/backend/tests/roles.test.js

const request = require('supertest');
const app = require('../app');

describe('Role Middleware', () => {
  // Mock a user with a specific role for testing
  const mockUserWithRole = (role) => {
    return {
      role: role,
      id: 'test-user-id'
    };
  };

  // Test that the middleware allows access to users with correct roles
  test('should allow access to users with correct roles', () => {
    const req = {
      user: mockUserWithRole('admin')
    };
    const res = {
      status: jest.fn().mockReturnThis(),
      json: jest.fn()
    };
    const next = jest.fn();

    const middleware = require('../middleware/role.middleware');
    middleware.requireRole(['admin'])(req, res, next);

    expect(next).toHaveBeenCalled();
  });

  // Test that the middleware denies access to users with incorrect roles
  test('should deny access to users with incorrect roles', () => {
    const req = {
      user: mockUserWithRole('user')
    };
    const res = {
      status: jest.fn().mockReturnThis(),
      json: jest.fn()
    };
    const next = jest.fn();

    const middleware = require('../middleware/role.middleware');
    middleware.requireRole(['admin'])(req, res, next);

    expect(res.status).toHaveBeenCalledWith(403);
    expect(res.json).toHaveBeenCalledWith({ error: 'Forbidden' });
  });

  // Test that the middleware denies access to users without roles
  test('should deny access to users without roles', () => {
    const req = {
      user: null
    };
    const res = {
      status: jest.fn().mockReturnThis(),
      json: jest.fn()
    };
    const next = jest.fn();

    const middleware = require('../middleware/role.middleware');
    middleware.requireRole(['admin'])(req, res, next);

    expect(res.status).toHaveBeenCalledWith(401);
    expect(res.json).toHaveBeenCalledWith({ error: 'Unauthorized' });
  });

  // Test that the middleware allows access to users with one of multiple required roles
  test('should allow access to users with one of multiple required roles', () => {
    const req = {
      user: mockUserWithRole('moderator')
    };
    const res = {
      status: jest.fn().mockReturnThis(),
      json: jest.fn()
    };
    const next = jest.fn();

    const middleware = require('../middleware/role.middleware');
    middleware.requireRole(['admin', 'moderator'])(req, res, next);

    expect(next).toHaveBeenCalled();
  });
});