Untitled

// SINGLE LAYER
test('login with correct credentials returns success', () => {
  // Test implementation...
});

test('login with wrong credentials returns error', () => {
  // Test implementation...
});

test('register with valid details creates a new user', () => {
  // Test implementation...
});

test('register with existing email returns error', () => {
  // Test implementation...
});

// NESTED TESTS
describe('User Authentication', () => {
  describe('Login', () => {
    test('returns success for correct credentials', () => {
      // Test implementation...
    });

    test('returns error for wrong credentials', () => {
      // Test implementation...
    });
  });

  describe('Registration', () => {
    test('creates a new user with valid details', () => {
      // Test implementation...
    });

    test('returns error for an existing email', () => {
      // Test implementation...
    });
  });
});