gridpilot.gg/tests/integration/health/use-cases/check-api-health.integration.test.ts

import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { HealthTestContext } from '../HealthTestContext';

describe('CheckApiHealthUseCase', () => {
  let context: HealthTestContext;

  beforeEach(() => {
    context = HealthTestContext.create();
    context.reset();
  });

  afterEach(() => {
    context.teardown();
  });

  describe('Success Path', () => {
    it('should perform health check and return healthy status', async () => {
      context.healthCheckAdapter.setResponseTime(50);

      const result = await context.checkApiHealthUseCase.execute();

      expect(result.healthy).toBe(true);
      expect(result.responseTime).toBeGreaterThanOrEqual(50);
      expect(result.timestamp).toBeInstanceOf(Date);
      expect(context.eventPublisher.getEventCountByType('HealthCheckCompleted')).toBe(1);
    });

    it('should handle health check with custom endpoint', async () => {
      context.healthCheckAdapter.configureResponse('/custom/health', {
        healthy: true,
        responseTime: 50,
        timestamp: new Date(),
      });

      const result = await context.checkApiHealthUseCase.execute();

      expect(result.healthy).toBe(true);
      expect(context.eventPublisher.getEventCountByType('HealthCheckCompleted')).toBe(1);
    });
  });

  describe('Failure Path', () => {
    it('should handle failed health check and return unhealthy status', async () => {
      context.healthCheckAdapter.setShouldFail(true, 'ECONNREFUSED');

      const result = await context.checkApiHealthUseCase.execute();

      expect(result.healthy).toBe(false);
      expect(result.error).toBeDefined();
      expect(context.eventPublisher.getEventCountByType('HealthCheckFailed')).toBe(1);
    });

    it('should handle timeout during health check', async () => {
      context.healthCheckAdapter.setShouldFail(true, 'Timeout');

      const result = await context.checkApiHealthUseCase.execute();

      expect(result.healthy).toBe(false);
      expect(result.error).toContain('Timeout');
      // Note: CheckApiHealthUseCase might not emit HealthCheckTimeoutEvent if it just catches the error
      // and emits HealthCheckFailedEvent instead. Let's check what it actually does.
      expect(context.eventPublisher.getEventCountByType('HealthCheckFailed')).toBe(1);
    });
  });
});