Tests

/**
 * Playwright UI smoke test.
 * 
 * Purpose:
 * - Verify that the application loads correctly
 * - Check that critical UI elements are visible
 * - Perform a basic user interaction
 * 
 * @see https://playwright.dev/docs/writing-tests
 */
import { expect, test } from '@playwright/test';

const APP_URL = 'https://demo.playwright.dev/todomvc';

test.describe('UI smoke test', () => {
  test('home page renders primary UI', async ({ page }) => {
    // Navigate to the application
    await page.goto(APP_URL);

    // Verify page title and input visibility
    await expect(page).toHaveTitle(/TodoMVC/);
    await expect(page.getByPlaceholder('What needs to be done?')).toBeVisible();

    // Perform interaction: Add a new task
    await page.getByPlaceholder('What needs to be done?').fill('Smoke task');
    await page.keyboard.press('Enter');
    
    // Verify the task was added to the list
    await expect(page.getByRole('listitem').first()).toContainText('Smoke task');
  });
});

/**
 * API health probe with contract checks.
 * 
 * Purpose:
 * - Verify that the API is up and running (status 200)
 * - Check that the response headers are correct (Content-Type)
 * - Validate the structure and data types of the response body
 * 
 * @see https://playwright.dev/docs/api-testing
 */
import { expect, test } from '@playwright/test';

const API_URL = 'https://jsonplaceholder.typicode.com';

test.describe('API health check', () => {
  test('health endpoint responds with expected payload', async ({ request }) => {
    // Send GET request
    const response = await request.get(API_URL + '/posts/1');

    // Basic status checks
    expect(response.ok()).toBeTruthy();
    expect(response.status()).toBe(200);
    expect(response.headers()['content-type']).toContain('application/json');

    // Validate JSON structure
    const body = await response.json();
    expect(body).toMatchObject({ id: 1 });
    expect(typeof body.title).toBe('string');
  });
});

/**
 * k6 smoke test for uptime and latency.
 * 
 * Purpose:
 * - Verify system availability (uptime)
 * - Check basic latency performance
 * - Ensure the system is ready for heavier load tests
 * 
 * Configuration:
 * - VUs: 3 virtual users running concurrently
 * - Duration: 30 seconds test run
 * - Thresholds: 
 *   - Error rate must be < 1%
 *   - 95th percentile response time must be < 800ms
 * 
 * @see https://grafana.com/docs/k6/latest/using-k6/thresholds/
 */
import http from 'k6/http';
import { check, sleep } from 'k6';

export const options = {
  vus: 3,           // 3 concurrent users
  duration: '30s',  // Run for 30 seconds
  thresholds: {
    http_req_failed: ['rate<0.01'],      // Error rate < 1%
    http_req_duration: ['p(95)<800'],    // 95% of requests < 800ms
  },
};

export default function () {
  const baseUrl = 'https://test-api.k6.io';
  const response = http.get(baseUrl + '/public/crocodiles/1/');

  // Validate response
  check(response, {
    'status is 200': (res) => res.status === 200,
    'body is not empty': (res) => res.body && res.body.length > 0,
  });

  sleep(1); // Pause between requests
}