e2e-panther-playwright_skill

Overview

This skill drives Symfony end-to-end testing using Panther and Playwright to create deterministic, regression-safe delivery. It focuses on a TDD-style RED/GREEN/REFACTOR loop to convert bugs into executable tests and protect behavior across releases. The skill reports changed test files, executed commands, and coverage/confidence notes.

How this skill works

You write a failing e2e test that captures the target behavior and at least one boundary case, then implement the minimal change to make the test pass and refactor while keeping the suite green. The tool emphasizes deterministic fixtures and isolated tests, running Panther and Playwright tasks to exercise the full stack and capture observable outcomes. Outputs include the RED→GREEN→REFACTOR trace, which files changed, the commands run, and short notes on coverage and confidence.

When to use it

• When you want regression-safe behavior delivery with TDD or functional/e2e tests
• When converting a bug report into an executable failing test before fixing
• When adding critical user flows that must remain stable in CI
• When validating authorization, not-found, and invalid-input paths in production-like scenarios

Best practices

• Start with a failing test and include at least one boundary case
• Use deterministic fixtures and builders to avoid flaky runs
• Assert observable behavior (HTTP responses, UI state), not internal implementation
• Keep tests isolated and lightweight so they are stable in CI
• Broaden coverage gradually: invalid, unauthorized, and not-found cases after green

Example use cases

• Turn a reported UI bug into a failing Panther/Playwright test, fix the code, and prove the regression is gone
• Add end-to-end coverage for a payment or signup flow with deterministic user builders
• Protect critical admin flows by adding authorization and not-found test cases
• Use RED/GREEN/REFACTOR trace to document the change set and commands executed for a release audit