Execution Engine

Deterministic execution pipelines for UI, API, and data validation tests.

Execution Architecture

The engine schedules test jobs to execution workers and records every action for reproducibility. Tests execute across UI, API, and data layers with coordinated orchestration.

Execution Pipelines

UI Pipeline

Browser automation using Playwright with resilient selectors, automatic retries, and visual regression detection.

API Pipeline

REST and GraphQL validation with contract testing, schema verification, and response assertion.

Data Pipeline

Database integrity checks, event stream validation, and data consistency verification across services.

Parallel Execution

Parallel runs are policy-aware and support environment-level quotas to prevent overloading shared systems:

bash

executionConfig:
  parallelism: 10           # Max concurrent tests
  retryPolicy:
    maxAttempts: 3
    backoff: exponential
  timeouts:
    default: 60s
    ui: 120s
    api: 30s
  environmentQuotas:
    staging:
      maxConcurrent: 5
      rateLimit: "100/min"

UI Test Execution

Browser tests run in isolated contexts with automatic screenshot and video capture:

bash

// Example UI test
test("checkout flow", async ({ page }) => {
  await page.goto("/products");
  await page.click("[data-testid='add-to-cart']");
  await page.click("[data-testid='checkout']");
  await page.fill("[name='email']", "user@example.com");
  await page.click("[data-testid='pay']");
  
  // Resilient assertion
  await expect(page).toHaveURL(//confirmation/);
  await expect(page.locator("[data-testid='success']")).toBeVisible();
});

API Test Execution

API tests validate contracts, status codes, response schemas, and business logic:

bash

// Example API test
test("create order API", async () => {
  const response = await request.post("/api/orders", {
    data: {
      items: [{ productId: "123", quantity: 2 }],
      customerId: "user-456"
    }
  });
  
  expect(response.status).toBe(201);
  expect(response.data).toMatchSchema(OrderSchema);
  expect(response.data.orderId).toBeDefined();
  expect(response.data.total).toBeGreaterThan(0);
});

Deterministic Replay

Every execution is recorded and can be replayed for debugging:

Network requests and responses captured with HAR files
Browser interactions recorded as Playwright traces
Environment state snapshots before/after execution
Full replay capability for failed tests

Execution Observability

Real-time execution metrics and logs:

bash

# Execution dashboard shows:
- Tests running: 12
- Tests queued: 8
- Success rate: 94%
- Average duration: 45s
- Active workers: 10/20

# Detailed logs for each test
[2026-03-16 10:23:45] Test started: checkout-flow
[2026-03-16 10:23:46] Navigate to /products
[2026-03-16 10:23:47] Click add-to-cart button
[2026-03-16 10:23:48] Assertion passed: URL matches /cart
[2026-03-16 10:23:50] Test passed in 5.2s