Blog

Playwright Chrome Extension Testing (Manifest V3) Guide 2026

Test Chrome extensions with Playwright in 2026: load MV3 via launchPersistentContext, reach the service worker, get the extension ID, test popups and scripts.

Playwright Trace CLI Analysis Guide 2026: npx playwright trace

Analyze Playwright traces from the terminal with npx playwright trace and --debug=cli. Built for AI agents and headless CI. Modes, examples, and CI setup.

Pytest 9 New Features & Migration Guide 2026 (from Pytest 8)

Pytest 9 for 2026: new features, deprecations removed from pytest 8, the new minimum Python version, behavioral changes, and a safe migration checklist.

Qase Test Management Guide 2026: Setup, API, Integrations

A practical Qase tutorial for 2026 — core concepts, the REST API v1 with curl and fetch, Playwright reporter setup, CI integration, AI features, and Qase vs TestRail.

W&B Weave LLM Evaluation & Tracing Guide 2026

Learn W&B Weave for LLM evaluation and tracing: weave.init, the @weave.op decorator, weave.Evaluation, scorers, LLM-as-judge, the Weave UI, and CI usage in 2026.

Deepchecks LLM Evaluation Guide 2026: Properties, Golden Sets, CI

A complete guide to Deepchecks LLM Evaluation: built-in and custom properties, golden sets, LLM-as-judge, CI integration, and version comparison.

Giskard LLM Testing Guide (2026): Scan, RAGET & Test Suites

Learn Giskard LLM testing in 2026: automatic vulnerability scans, RAGET for RAG evaluation, pytest test suites, CI integration, and Giskard Hub. With real Python code.

Locust Load Testing with Python: The Complete 2026 Guide

Master Locust load testing in Python: write locustfiles, run distributed master-worker swarms, custom load shapes, percentiles, CSV export, and CI integration.

OpenAI Evals API Reference 2026: Endpoints, Graders, Runs

A canonical OpenAI Evals API reference: creating evals, eval runs, data source configs, graders, sampling, reading results, and the oaieval CLI.

Pact Broker Setup: Self-Host, Publish & can-i-deploy (2026)

Complete Pact Broker setup guide: self-host with Docker Compose, publish pacts, run can-i-deploy, wire webhooks, version with git SHA and branches, and gate CI.

Playwright AI Test Generation with Copilot: 2026 Complete Guide

Generate Playwright tests with GitHub Copilot and the Playwright MCP server in 2026. Prompting patterns, mcp.json config, codegen, and AI healing workflows.

Spring Cloud Contract Testing: The Complete JVM Guide (2026)

Master Spring Cloud Contract testing: write Groovy/YAML contracts, generate producer tests, publish stubs, run @AutoConfigureStubRunner, message contracts, and Pact compared.

State of JS 2025 Testing Results: What the Data Reveals

The State of JS 2025 testing results are in: Vitest surges, Playwright satisfaction hits 91% vs Cypress 72%, Jest declines, and node:test rises. Full analysis.

Trace-Based Testing with OpenTelemetry: The 2026 Practical Guide

Learn trace-based testing with OpenTelemetry in 2026: assert on distributed-trace spans, instrument services, write Tracetest specs, and integrate with CI.

AI-Augmented Software Testing in 2026: The Complete Guide

AI-augmented software testing in 2026: Gartner Magic Quadrant, MCP integration, autonomous vs assistive agents, evaluation criteria, risks, and an adoption roadmap.

Bi-Directional Contract Testing with Pact (2026 Guide)

Understand bi-directional contract testing (BDCT) vs consumer-driven contracts (CDCT), the PactFlow workflow, can-i-deploy gating, and migrating from CDCT.

Chrome for Testing vs Chromium in Playwright (2026 Guide)

Playwright 1.57 switched to Chrome for Testing. Learn what CfT is, why it changed, channel vs chromium vs chrome, pinning versions, headless new, and CI/Docker impact.

Tutorial

k6 + Grafana Cloud Load Testing: Full Tutorial (2026)

Learn k6 load testing end to end: write JS test scripts, set thresholds and scenarios, run locally, then scale to 1M VUs on Grafana Cloud k6 with CI.

Playwright await using: Automatic Cleanup of Browsers and Pages

Reference guide to using await using and Symbol.asyncDispose in Playwright for automatic, deterministic cleanup of browsers, contexts, and pages.

Playwright File Upload with setInputFiles: Complete Guide

File upload in Playwright: setInputFiles single/multiple files, Buffer uploads, hidden inputs, the filechooser event, directory and drag-and-drop uploads.

Playwright Screencast API & Video Recording: Complete Guide

Record video of Playwright tests two ways: classic context-level recordVideo and the new page.screencast API. Save, attach, upload to CI, and combine with traces.

PLAYWRIGHT_BROWSERS_PATH: The Complete Reference Guide

Reference for PLAYWRIGHT_BROWSERS_PATH in Playwright (Python + Node): default paths per OS, value 0, custom paths, Docker, CI caching, and troubleshooting.

What's New in Playwright 1.59: The Agentic Release Explained

A deep dive into Playwright 1.59, the first release built for AI agents: page.screencast, browser.bind(), the CLI dashboard, --debug=cli, and await using.

k6 vs JMeter in 2026 -- Which Load Testing Tool Wins?

k6 vs JMeter compared for 2026: JavaScript vs XML scripting, CI/CD integration, cloud execution, protocol support, cost, and which performance testing tool fits your team.

Playwright File Upload with setInputFiles: Complete Reference

Complete Playwright file upload reference: setInputFiles for single, multiple, buffer, and MIME examples, hidden inputs, file choosers, drag-and-drop, and clearing files.

PLAYWRIGHT_BROWSERS_PATH: Complete Environment Variable Reference

Canonical reference for PLAYWRIGHT_BROWSERS_PATH and Playwright browser env vars. Exact values, default install paths per OS, PLAYWRIGHT_BROWSERS_PATH=0 meaning, and Python notes.

Postman vs Playwright: API Testing vs E2E Testing in 2026

Postman vs Playwright compared for 2026: API testing vs end-to-end browser automation, scripting, CI, assertions, performance, and when to use each (or both) together.

PyUnit vs Pytest: unittest vs Pytest Compared (2026)

PyUnit vs pytest compared: syntax, fixtures, assertions, parametrization, and when to use unittest or pytest. Clear examples and a decision guide for 2026.

testRigor vs Playwright -- Codeless AI Testing vs Code-Based E2E

A deep comparison of testRigor and Playwright in 2026. Plain-English AI test automation versus code-based end-to-end testing, with side-by-side syntax, pricing, maintenance, and team-fit guidance.

unittest.mock vs pytest-mock -- The Complete 2026 Guide

unittest.mock vs pytest-mock compared: the mocker fixture, patch, MagicMock, autospec, teardown, and when to use each Python mocking approach with runnable examples.

Vitest 4 Migration Guide -- Vitest 3 to 4 Breaking Changes

A practical Vitest 4.0 migration guide. Covers every Vitest 3 to 4 breaking change, the new browser mode, V8 coverage AST remapping, spy API changes, config updates, and a step-by-step upgrade path.

What's New in Playwright 2026: Features, Updates & Releases

A complete look at what is new in Playwright 2026: test runner upgrades, trace viewer, UI mode, component testing, the Playwright MCP, and migration tips.

Appium vs Playwright in 2026 -- Mobile vs Web Testing Showdown

Appium vs Playwright compared for 2026: native mobile vs web and hybrid testing, architecture, speed, device coverage, code samples, and how to choose the right tool.

Cucumber vs Playwright in 2026 — BDD Gherkin vs E2E, and When to Combine

Cucumber vs Playwright compared for 2026. Learn the difference between BDD Gherkin specs and a modern E2E framework, see runnable code, and decide when to combine both.

Detox vs Appium 2026 — React Native Mobile E2E Testing Compared

A deep 2026 comparison of Detox vs Appium for React Native mobile E2E testing. Architecture, speed, flakiness, setup, CI, and runnable code samples to help you choose.

Tutorial

Midscene AI Testing: Visual UI Automation Guide for 2026

Master Midscene.js AI testing: vision-LLM UI automation with aiAction, aiTap, aiQuery, and aiAssert. Natural-language Playwright and Puppeteer testing.

Playwright Visual Regression Testing: The Complete 2026 Guide

Master Playwright visual regression testing in 2026 with toHaveScreenshot, snapshots, masking, threshold tuning, and CI. Includes runnable TypeScript examples.

Playwright vs Selenium Python in 2026: A Tester Guide

Playwright vs Selenium for Python testers in 2026: speed, auto-waiting, parallelism, debugging, CI, and a full migration guide with runnable pytest code examples.

Robot Framework vs Playwright in 2026 — Keyword-Driven vs Code-First E2E

Robot Framework vs Playwright compared for 2026. Keyword-driven .robot syntax vs code-first TypeScript E2E, with runnable examples, speed, and the Browser library combo.

Tutorial

Stagehand AI Browser Automation: The Complete 2026 Guide

Learn Stagehand by Browserbase: AI browser automation with act, extract, and observe. Natural-language Playwright backed by an LLM, with runnable TypeScript.

Vitest vs Jest 2026: Speed, ESM, Config, and Migration

A practical Vitest vs Jest comparison for 2026: benchmark speed, native ESM and TypeScript support, config differences, mocking, and a step-by-step migration guide.

WebdriverIO vs Playwright in 2026 -- Architecture and API Compared

WebdriverIO vs Playwright for 2026: protocol and architecture, API design, auto-waiting, ecosystem, parallelism, and code samples to help you pick the right framework.

Agent Trajectory Evaluation Guide: Score Multi-Step Runs (2026)

Evaluate AI agent trajectories in 2026: outcome vs step-level scoring, success criteria, tool-call correctness, efficiency metrics, and LLM-as-judge rubrics.

AgentOps AI Agent Monitoring Guide (2026)

AgentOps guide for 2026: monitor and debug AI agents with session replay, LLM cost and latency tracking, and observability for multi-step agentic workflows.

AssertJ vs Hamcrest vs JUnit Assertions (2026)

AssertJ vs Hamcrest vs JUnit assertions compared for Java in 2026: fluent syntax, readability, error messages, IDE autocomplete, and which to choose.

BLEU vs ROUGE vs BERTScore: LLM Metrics Reference (2026)

BLEU vs ROUGE vs BERTScore vs semantic similarity for LLM evaluation: formulas, when to use each, code, and limits. A 2026 reference for SDETs.

Testing

Boundary Value Analysis & Equivalence Partitioning Guide

Master boundary value analysis and equivalence partitioning with worked examples, tables, and code. Learn 2-value vs 3-value BVA and how to combine both techniques.

Braintrust LLM Evaluation Guide (2026)

Learn Braintrust for LLM evaluation in 2026: run Eval() experiments, build scorers, manage datasets, and compare prompt/model changes with regression tracking.

BrowserStack vs Sauce Labs vs LambdaTest (2026 Comparison)

BrowserStack vs Sauce Labs vs LambdaTest compared for 2026: cross-browser cloud grids, real-device coverage, framework support, pricing model, and a verdict.