rxminder/tests/setup.ts

// Test setup file
// Configure jsdom and global test utilities with improved type safety

/* eslint-disable no-console */

import 'jest-environment-jsdom';

// Mock UUID library at module level
let mockUuidCounter = 1;
jest.mock('uuid', () => ({
  v4: (): string => {
    const counter = mockUuidCounter++;
    const hex = counter.toString(16).padStart(32, '0');
    return `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20, 32)}`;
  },
}));

// Define proper types for our mocks
interface MockStorage {
  getItem: (key: string) => string | null;
  setItem: (key: string, value: string) => void;
  removeItem: (key: string) => void;
  clear: () => void;
  length: number;
  key: (index: number) => string | null;
}

interface MockResponse {
  ok: boolean;
  status: number;
  statusText: string;
  json: () => Promise<Record<string, unknown>>;
  text: () => Promise<string>;
  blob: () => Promise<Blob>;
  arrayBuffer: () => Promise<ArrayBuffer>;
  headers: Map<string, string>;
}

interface MockFormData {
  append: (key: string, value: string | File) => void;
  get: (key: string) => string | File | null;
  has: (key: string) => boolean;
  delete: (key: string) => void;
  entries: () => IterableIterator<[string, string | File]>;
  forEach: (
    callback: (value: string | File, key: string, parent: MockFormData) => void
  ) => void;
}

// Mock localStorage with proper implementation
const createMockStorage = (): MockStorage => {
  let store: Record<string, string> = {};

  return {
    getItem: (key: string): string | null => {
      return store[key] || null;
    },
    setItem: (key: string, value: string): void => {
      store[key] = value.toString();
    },
    removeItem: (key: string): void => {
      delete store[key];
    },
    clear: (): void => {
      store = {};
    },
    get length(): number {
      return Object.keys(store).length;
    },
    key: (index: number): string | null => {
      const keys = Object.keys(store);
      return keys[index] || null;
    },
  };
};

const localStorageMock = createMockStorage();
const sessionStorageMock = createMockStorage();

// Attach storage mocks to global
Object.defineProperty(global, 'localStorage', {
  value: localStorageMock,
  writable: true,
});

Object.defineProperty(global, 'sessionStorage', {
  value: sessionStorageMock,
  writable: true,
});

// Mock fetch with comprehensive response handling
const createMockResponse = (
  data: Record<string, unknown> = { id: 'test-message-id' },
  options: Partial<MockResponse> = {}
): MockResponse => ({
  ok: true,
  status: 200,
  statusText: 'OK',
  json: () => Promise.resolve(data),
  text: () => Promise.resolve(JSON.stringify(data)),
  blob: () => Promise.resolve(new Blob([JSON.stringify(data)])),
  arrayBuffer: () => Promise.resolve(new ArrayBuffer(0)),
  headers: new Map(),
  ...options,
});

global.fetch = jest
  .fn()
  .mockResolvedValue(
    createMockResponse() as unknown as Response
  ) as jest.MockedFunction<typeof fetch>;

// Mock FormData with proper implementation
class MockFormDataImpl implements MockFormData {
  private data: Map<string, string | File> = new Map();

  append(key: string, value: string | File): void {
    this.data.set(key, value);
  }

  get(key: string): string | File | null {
    return this.data.get(key) || null;
  }

  has(key: string): boolean {
    return this.data.has(key);
  }

  delete(key: string): void {
    this.data.delete(key);
  }

  entries(): IterableIterator<[string, string | File]> {
    return this.data.entries();
  }

  forEach(
    callback: (value: string | File, key: string, parent: MockFormData) => void
  ): void {
    this.data.forEach((value, key) => callback(value, key, this));
  }

  // Additional methods for completeness
  getAll(key: string): (string | File)[] {
    const value = this.data.get(key);
    return value ? [value] : [];
  }

  keys(): IterableIterator<string> {
    return this.data.keys();
  }

  values(): IterableIterator<string | File> {
    return this.data.values();
  }

  set(key: string, value: string | File): void {
    this.data.set(key, value);
  }

  [Symbol.iterator](): IterableIterator<[string, string | File]> {
    return this.data.entries();
  }
}

global.FormData = MockFormDataImpl as unknown as typeof FormData;

// Mock File API
global.File = class MockFile {
  name: string;
  size: number;
  type: string;
  lastModified: number;

  constructor(
    bits: BlobPart[],
    filename: string,
    options: FilePropertyBag = {}
  ) {
    this.name = filename;
    this.size = bits.reduce((size, bit) => {
      if (typeof bit === 'string') return size + bit.length;
      if (bit instanceof ArrayBuffer) return size + bit.byteLength;
      return size;
    }, 0);
    this.type = options.type || '';
    this.lastModified = options.lastModified || Date.now();
  }

  stream(): ReadableStream {
    throw new Error('Not implemented in test environment');
  }

  arrayBuffer(): Promise<ArrayBuffer> {
    return Promise.resolve(new ArrayBuffer(this.size));
  }

  text(): Promise<string> {
    return Promise.resolve('mock file content');
  }

  slice(): Blob {
    return new Blob();
  }
} as unknown as typeof File;

// Mock Blob API
global.Blob = class MockBlob {
  size: number;
  type: string;

  constructor(blobParts: BlobPart[] = [], options: BlobPropertyBag = {}) {
    this.size = blobParts.reduce((size, part) => {
      if (typeof part === 'string') return size + part.length;
      if (part instanceof ArrayBuffer) return size + part.byteLength;
      return size;
    }, 0);
    this.type = options.type || '';
  }

  arrayBuffer(): Promise<ArrayBuffer> {
    return Promise.resolve(new ArrayBuffer(this.size));
  }

  text(): Promise<string> {
    return Promise.resolve('mock blob content');
  }

  stream(): ReadableStream {
    throw new Error('Not implemented in test environment');
  }

  slice(): Blob {
    return new MockBlob() as unknown as Blob;
  }

  bytes(): Promise<Uint8Array<ArrayBuffer>> {
    return Promise.resolve(new Uint8Array(new ArrayBuffer(this.size)));
  }
} as unknown as typeof Blob;

// Mock crypto functions
global.btoa = (str: string): string => Buffer.from(str).toString('base64');
global.atob = (str: string): string => Buffer.from(str, 'base64').toString();

// Mock URL for file handling
global.URL = {
  createObjectURL: jest.fn(() => 'mock-url'),
  revokeObjectURL: jest.fn(),
} as unknown as typeof URL;

// Mock crypto.getRandomValues for UUID generation
Object.defineProperty(global, 'crypto', {
  value: {
    getRandomValues: (arr: Uint8Array): Uint8Array => {
      for (let i = 0; i < arr.length; i++) {
        arr[i] = Math.floor(Math.random() * 256);
      }
      return arr;
    },
    randomUUID: (): string => {
      return 'mock-uuid-' + (mockUuidCounter++).toString().padStart(8, '0');
    },
  },
});

// Mock performance API
global.performance = {
  now: jest.fn(() => Date.now()),
  mark: jest.fn(),
  measure: jest.fn(),
  getEntriesByType: jest.fn(() => []),
  getEntriesByName: jest.fn(() => []),
} as unknown as Performance;

// Mock ResizeObserver
global.ResizeObserver = class MockResizeObserver {
  observe = jest.fn();
  unobserve = jest.fn();
  disconnect = jest.fn();
} as unknown as typeof ResizeObserver;

// Mock IntersectionObserver
global.IntersectionObserver = class MockIntersectionObserver {
  observe = jest.fn();
  unobserve = jest.fn();
  disconnect = jest.fn();
  root = null;
  rootMargin = '';
  thresholds = [];
} as unknown as typeof IntersectionObserver;

// Mock import.meta for Vite environment variables
Object.defineProperty(globalThis, 'import', {
  value: {
    meta: {
      env: {
        NODE_ENV: 'test',
        MODE: 'test',
        DEV: false,
        PROD: false,
        SSR: false,
        VITE_COUCHDB_URL: 'http://localhost:5984',
        VITE_COUCHDB_USERNAME: 'admin',
        VITE_COUCHDB_PASSWORD: 'password',
        VITE_MAILGUN_API_KEY: 'test-key-12345',
        VITE_MAILGUN_DOMAIN: 'test.mailgun.org',
        VITE_MAILGUN_BASE_URL: 'https://api.mailgun.net/v3',
        VITE_MAILGUN_FROM_NAME: 'Test Medication App',
        VITE_MAILGUN_FROM_EMAIL: 'test@medapp.example.com',
        VITE_APP_BASE_URL: 'http://localhost:5173',
      },
    },
  },
  writable: true,
});

// Mock process.env for Node.js environment variables
process.env = {
  ...process.env,
  NODE_ENV: 'test',
  JWT_SECRET: 'test-jwt-secret',
  REFRESH_TOKEN_SECRET: 'test-refresh-secret',
};

// Setup function to clear all mocks before each test
const clearAllMocks = (): void => {
  localStorageMock.clear();
  sessionStorageMock.clear();
  (global.fetch as jest.MockedFunction<typeof fetch>).mockClear();
  mockUuidCounter = 1; // Reset UUID counter
  jest.clearAllMocks();
};

// Global beforeEach hook
beforeEach(() => {
  clearAllMocks();

  // Reset fetch mock to default success response
  (global.fetch as jest.MockedFunction<typeof fetch>).mockResolvedValue(
    createMockResponse() as unknown as Response
  );
});

// Console management for cleaner test output
const originalConsole = {
  error: console.error,
  warn: console.warn,
  log: console.log,
  info: console.info,
};

// Patterns to suppress in test output
const SUPPRESSED_PATTERNS = [
  // React warnings
  'Warning: ReactDOM.render is deprecated',
  'Warning: componentWillMount has been renamed',
  'Warning: componentWillReceiveProps has been renamed',
  'Warning: componentWillUpdate has been renamed',

  // Application specific warnings
  '📧 Mailgun Service',
  'Failed to send verification email',
  'Email sending failed',

  // Auth flow logging
  '🔐 Login attempt for:',
  '❌ User not found for email:',
  '👤 User found:',
  '🔍 Comparing passwords:',
  '❌ Password mismatch',
  '✅ Login successful for:',

  // Database warnings
  'CouchDB connection',
  'Mock database operation',
];

const shouldSuppressMessage = (message: string): boolean => {
  return SUPPRESSED_PATTERNS.some(pattern => message.includes(pattern));
};

beforeAll(() => {
  // Suppress console noise during tests
  console.error = (...args: unknown[]): void => {
    const message = args[0]?.toString() || '';
    if (!shouldSuppressMessage(message)) {
      originalConsole.error(...args);
    }
  };

  console.warn = (...args: unknown[]): void => {
    const message = args[0]?.toString() || '';
    if (!shouldSuppressMessage(message)) {
      originalConsole.warn(...args);
    }
  };

  // Suppress info and log in tests unless explicitly needed
  console.info = jest.fn();
  console.log = jest.fn();
});

afterAll(() => {
  // Restore original console methods
  Object.assign(console, originalConsole);
});

// Utility functions for tests
export const testUtils = {
  clearAllMocks,
  createMockResponse,
  shouldSuppressMessage,

  // Helper to create mock users for tests
  createMockUser: (
    overrides: Record<string, unknown> = {}
  ): Record<string, unknown> => ({
    _id: 'test-user-id',
    email: 'test@example.com',
    username: 'testuser',
    password: 'password123',
    emailVerified: false,
    status: 'PENDING',
    createdAt: new Date(),
    ...overrides,
  }),

  // Helper to mock async delays
  delay: (ms: number): Promise<void> =>
    new Promise(resolve => setTimeout(resolve, ms)),

  // Helper to wait for async operations in tests
  waitFor: async (
    callback: () => boolean | Promise<boolean>,
    options: { timeout?: number; interval?: number } = {}
  ): Promise<void> => {
    const { timeout = 5000, interval = 50 } = options;
    const start = Date.now();

    while (Date.now() - start < timeout) {
      const result = await callback();
      if (result) return;
      await testUtils.delay(interval);
    }

    throw new Error(`waitFor timeout after ${timeout}ms`);
  },
};

// Export for use in tests if needed
export default testUtils;