Interactive Test Playgrounds
Explore these interactive playgrounds to experience different testing approaches, frameworks, and methodologies. No login required - just start experimenting!
New to a topic? Read the Guides & Learn section first to understand the why before you practice the how.
TDD Learning Lab
Practice Test-Driven Development with a step-by-step guide through the Red-Green-Refactor cycle.
BDD Collaboration Lab
Explore Behavior-Driven Development with Gherkin specifications and see them become automated tests.
Framework Comparison
Compare different testing frameworks side-by-side to understand their strengths and trade-offs.
API Testing Sandbox
Test API endpoints with different methods and visualize request/response data in real-time.
E2E Selector Playground
Build resilient, user-facing locators against a sample app and see live which elements they match — and how robust they are.
Performance Testing Playground
Drive virtual users up and watch latency percentiles, throughput, and error rate — then let a threshold budget decide pass or fail.
Accessibility Testing Playground
Spot and fix the most common WCAG violations with before/after snippets, and watch the violation count fall to zero.
Contract Testing Playground
Declare what the consumer needs, spot where the provider response diverges, and align it until the contract is satisfied — Pact-style, with a live breaking-change count.
Visual Regression Playground
Diff a candidate render against the baseline, see the changed pixels light up, and tune pixel-vs-perceptual comparison so real regressions fail while noise doesn’t.