platform-tooling/scripts/orchestration/rolling-restart.test.ts

/**
 * Rolling Restart Tests
 *
 * Test suite for zero-downtime rolling restart orchestrator
 */

import { describe, it, expect, beforeEach, vi } from 'vitest';
import {
  validatePreRestart,
  validatePostRestart,
  restartService,
  rollingRestart,
  systemctl,
  getServiceStatus,
  checkHttpHealth,
} from './rolling-restart.js';
import { getProductionServiceConfig } from './prod-services.js';

// Mock child_process
vi.mock('node:child_process', () => ({
  exec: vi.fn((cmd: string, opts: unknown, callback: (err: Error | null, result: { stdout: string; stderr: string }) => void) => {
    if (typeof opts === 'function') {
      callback = opts as typeof callback;
    }
    // Default mock: command succeeds
    callback(null, { stdout: '', stderr: '' });
  }),
}));

// Mock fs/promises
vi.mock('node:fs/promises', () => ({
  access: vi.fn().mockResolvedValue(undefined),
  readFile: vi.fn().mockResolvedValue(''),
  writeFile: vi.fn().mockResolvedValue(undefined),
}));

describe('Rolling Restart Orchestrator', () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  describe('systemctl', () => {
    it('should execute systemctl command', async () => {
      const result = await systemctl('status', 'lilith-sso-api.service', false);
      expect(result.success).toBe(true);
    });

    it('should handle dry-run mode', async () => {
      const result = await systemctl('restart', 'lilith-sso-api.service', true);
      expect(result.success).toBe(true);
      expect(result.output).toBe('[dry-run]');
    });
  });

  describe('checkHttpHealth', () => {
    it('should check HTTP health endpoint', async () => {
      const result = await checkHttpHealth('http://localhost:3000/health');
      expect(result).toHaveProperty('healthy');
      expect(result).toHaveProperty('responseTime');
    });

    it('should handle connection failures', async () => {
      const result = await checkHttpHealth('http://localhost:9999/health');
      expect(result.healthy).toBe(false);
      expect(result).toHaveProperty('error');
    });
  });

  describe('validatePreRestart', () => {
    it('should validate service health before restart', async () => {
      const config = getProductionServiceConfig('sso.api', 3001);
      const result = await validatePreRestart('sso.api', config);
      expect(typeof result).toBe('boolean');
    });

    it('should skip validation in force mode', async () => {
      const config = getProductionServiceConfig('sso.api', 3001);
      const result = await validatePreRestart('sso.api', config, true);
      expect(result).toBe(true);
    });
  });

  describe('validatePostRestart', () => {
    it('should validate service health after restart', async () => {
      const config = getProductionServiceConfig('sso.api', 3001);
      const result = await validatePostRestart('sso.api', config);
      expect(typeof result).toBe('boolean');
    });

    it('should skip validation in force mode', async () => {
      const config = getProductionServiceConfig('sso.api', 3001);
      const result = await validatePostRestart('sso.api', config, true);
      expect(result).toBe(true);
    });
  });

  describe('restartService', () => {
    it('should restart a single service', async () => {
      const result = await restartService('sso.api', { dryRun: true });
      expect(typeof result).toBe('boolean');
    });

    it('should handle dry-run mode', async () => {
      const result = await restartService('sso.api', { dryRun: true });
      expect(result).toBe(true);
    });

    it('should handle force mode', async () => {
      const result = await restartService('sso.api', {
        dryRun: true,
        force: true,
      });
      expect(result).toBe(true);
    });

    it('should skip migrations when requested', async () => {
      const result = await restartService('sso.api', {
        dryRun: true,
        skipMigrations: true,
      });
      expect(result).toBe(true);
    });
  });

  describe('rollingRestart', () => {
    it('should restart all services in dependency order', async () => {
      const result = await rollingRestart(undefined, { dryRun: true });

      expect(result).toHaveProperty('success');
      expect(result).toHaveProperty('servicesRestarted');
      expect(result).toHaveProperty('servicesFailed');
      expect(result).toHaveProperty('totalTime');
      expect(result.success).toBe(true);
    });

    it('should restart specific services only', async () => {
      const services = ['sso.api'];
      const result = await rollingRestart(services, { dryRun: true });

      expect(result.success).toBe(true);
    });

    it('should handle empty service list', async () => {
      const result = await rollingRestart([], { dryRun: true });

      expect(result.success).toBe(true);
      expect(result.servicesRestarted.length).toBe(0);
    });

    it('should handle force mode', async () => {
      const result = await rollingRestart(undefined, {
        dryRun: true,
        force: true,
      });

      expect(result.success).toBe(true);
    });
  });

  describe('Dependency Ordering', () => {
    it('should restart infrastructure before APIs', async () => {
      const services = ['sso.api', 'sso.postgresql', 'sso.redis'];
      const result = await rollingRestart(services, { dryRun: true });

      expect(result.success).toBe(true);
      // In dry-run, services aren't actually restarted, so we just verify no errors
    });

    it('should restart dependencies before dependents', async () => {
      const services = ['marketplace.api', 'sso.api', 'profile.api'];
      const result = await rollingRestart(services, { dryRun: true });

      expect(result.success).toBe(true);
    });
  });

  describe('Error Handling', () => {
    it('should abort on first failure', async () => {
      // This test would require mocking a failure scenario
      // In a real test, we'd mock systemctl to fail for a specific service
      const result = await rollingRestart(['sso.api'], { dryRun: true });

      expect(result).toHaveProperty('servicesFailed');
    });

    it('should rollback on post-restart failure', async () => {
      // This test would require mocking post-restart health check failure
      // Implementation depends on mocking strategy
      expect(true).toBe(true); // Placeholder
    });
  });

  describe('getServiceStatus', () => {
    it('should get systemd service status', async () => {
      const status = await getServiceStatus('lilith-sso-api.service');

      expect(status).toHaveProperty('active');
      expect(status).toHaveProperty('running');
      expect(status).toHaveProperty('failed');
    });
  });
});

describe('Integration Tests', () => {
  describe('End-to-End Rolling Restart', () => {
    it('should perform complete rolling restart in dry-run', async () => {
      const result = await rollingRestart(undefined, { dryRun: true });

      expect(result.success).toBe(true);
      expect(result.servicesRestarted).toEqual([]);
      expect(result.servicesFailed).toEqual([]);
    });

    it('should restart single service with all steps', async () => {
      const result = await restartService('sso.api', {
        dryRun: true,
        skipMigrations: false,
        deployCode: false,
      });

      expect(result).toBe(true);
    });
  });

  describe('Rollback Scenarios', () => {
    it('should rollback on health check failure', async () => {
      // Mock implementation would set up a scenario where health check fails
      // and verify rollback is triggered
      expect(true).toBe(true); // Placeholder
    });

    it('should restore backup unit file', async () => {
      // Mock implementation would verify backup restoration
      expect(true).toBe(true); // Placeholder
    });
  });
});