develop-web-game

Automate web game testing by running a Playwright loop that uses virtual time stepping and state inspection. This requires integrating `window.advanceTime` and `window.render_game_to_text` hooks into your HTML/JS game for deterministic test execution.

Deterministic game testing ensures consistent test results by controlling time progression and state inspection. You need it for JavaScript games when visual validation and console error analysis must remain stable across automated Playwright test runs.

Iterate on game features by implementing small code changes and running the Playwright test script. The loop captures screenshots for visual validation and analyzes console errors, allowing you to verify mechanics like character movement step-by-step.

Playwright testing requires specific hooks for HTML/JS game state inspection. Your game must implement `window.render_game_to_text` to capture state and `window.advanceTime` to enable virtual time stepping during the automated test loop.

A limitation of using Playwright for web game visual validation is that it requires deterministic testing setups. Games lacking the `window.advanceTime` and `window.render_game_to_text` hooks cannot utilize the virtual time stepping and state inspection features.

You can test character movement mechanics by implementing the change, running the Playwright test script, and reviewing the resulting screenshot and textual state output. This allows you to iterate until the movement behaves as expected.