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.github/skills/test-e2e-playwright-coverage.SKILL.md
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.github/skills/test-e2e-playwright-coverage.SKILL.md
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---
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# agentskills.io specification v1.0
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name: "test-e2e-playwright-coverage"
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version: "1.0.0"
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description: "Run Playwright E2E tests with code coverage collection using @bgotink/playwright-coverage"
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author: "Charon Project"
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license: "MIT"
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tags:
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- "testing"
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- "e2e"
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- "playwright"
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- "coverage"
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- "integration"
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compatibility:
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os:
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- "linux"
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- "darwin"
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shells:
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- "bash"
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requirements:
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- name: "node"
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version: ">=18.0"
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optional: false
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- name: "npx"
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version: ">=1.0"
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optional: false
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environment_variables:
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- name: "PLAYWRIGHT_BASE_URL"
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description: "Base URL of the Charon application under test"
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default: "http://localhost:8080"
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required: false
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- name: "PLAYWRIGHT_HTML_OPEN"
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description: "Controls HTML report auto-open behavior (set to 'never' for CI/non-interactive)"
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default: "never"
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required: false
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- name: "CI"
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description: "Set to 'true' when running in CI environment"
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default: ""
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required: false
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parameters:
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- name: "project"
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type: "string"
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description: "Browser project to run (chromium, firefox, webkit)"
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default: "chromium"
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required: false
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outputs:
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- name: "coverage-e2e"
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type: "directory"
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description: "E2E coverage output directory with LCOV and HTML reports"
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path: "coverage/e2e/"
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- name: "playwright-report"
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type: "directory"
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description: "HTML test report directory"
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path: "playwright-report/"
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- name: "test-results"
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type: "directory"
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description: "Test artifacts and traces"
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path: "test-results/"
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metadata:
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category: "test"
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subcategory: "e2e-coverage"
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execution_time: "medium"
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risk_level: "low"
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ci_cd_safe: true
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requires_network: true
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idempotent: true
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---
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# Test E2E Playwright Coverage
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## Overview
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Runs Playwright end-to-end tests with code coverage collection using `@bgotink/playwright-coverage`. This skill collects V8 coverage data during test execution and generates reports in LCOV, HTML, and JSON formats suitable for upload to Codecov.
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**IMPORTANT**: This skill starts the **Vite dev server** (not Docker) because V8 coverage requires access to source files. Running coverage against the Docker container will result in `0%` coverage.
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| Mode | Base URL | Coverage Support |
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|------|----------|-----------------|
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| Docker (`localhost:8080`) | ❌ No - Shows "Unknown% (0/0)" |
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| Vite Dev (`localhost:5173`) | ✅ Yes - Real coverage data |
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## Prerequisites
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- Node.js 18.0 or higher installed and in PATH
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- Playwright browsers installed (`npx playwright install`)
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- `@bgotink/playwright-coverage` package installed
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- Charon application running (default: `http://localhost:8080`)
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- Test files in `tests/` directory using coverage-enabled imports
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## Usage
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### Basic Usage
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Run E2E tests with coverage collection:
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```bash
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.github/skills/scripts/skill-runner.sh test-e2e-playwright-coverage
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```
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### Browser Selection
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Run tests in a specific browser:
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```bash
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# Chromium (default)
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.github/skills/scripts/skill-runner.sh test-e2e-playwright-coverage --project=chromium
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# Firefox
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.github/skills/scripts/skill-runner.sh test-e2e-playwright-coverage --project=firefox
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```
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### CI/CD Integration
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For use in GitHub Actions or other CI/CD pipelines:
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```yaml
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- name: Run E2E Tests with Coverage
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run: .github/skills/scripts/skill-runner.sh test-e2e-playwright-coverage
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env:
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PLAYWRIGHT_BASE_URL: http://localhost:8080
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CI: true
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- name: Upload E2E Coverage to Codecov
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uses: codecov/codecov-action@v5
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with:
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files: ./coverage/e2e/lcov.info
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flags: e2e
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```
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## Parameters
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| Parameter | Type | Required | Default | Description |
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|-----------|------|----------|---------|-------------|
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| project | string | No | chromium | Browser project: chromium, firefox, webkit |
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## Environment Variables
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| Variable | Required | Default | Description |
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|----------|----------|---------|-------------|
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| PLAYWRIGHT_BASE_URL | No | http://localhost:8080 | Application URL to test against |
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| PLAYWRIGHT_HTML_OPEN | No | never | HTML report auto-open behavior |
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| CI | No | "" | Set to "true" for CI environment behavior |
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## Outputs
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### Success Exit Code
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- **0**: All tests passed and coverage generated
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### Error Exit Codes
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- **1**: One or more tests failed
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- **Non-zero**: Configuration or execution error
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### Output Directories
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- **coverage/e2e/**: Coverage reports (LCOV, HTML, JSON)
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- `lcov.info` - LCOV format for Codecov upload
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- `coverage.json` - JSON format for programmatic access
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- `index.html` - HTML report for visual inspection
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- **playwright-report/**: HTML test report with results and traces
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- **test-results/**: Test artifacts, screenshots, and trace files
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## Viewing Coverage Reports
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### Coverage HTML Report
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```bash
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# Open coverage HTML report
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open coverage/e2e/index.html
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```
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### Playwright Test Report
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```bash
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npx playwright show-report --port 9323
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```
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## Coverage Data Format
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The skill generates coverage in multiple formats:
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| Format | File | Purpose |
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|--------|------|---------|
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| LCOV | `coverage/e2e/lcov.info` | Codecov upload |
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| HTML | `coverage/e2e/index.html` | Visual inspection |
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| JSON | `coverage/e2e/coverage.json` | Programmatic access |
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## Related Skills
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- test-e2e-playwright - E2E tests without coverage
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- test-frontend-coverage - Frontend unit test coverage with Vitest
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- test-backend-coverage - Backend unit test coverage with Go
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## Notes
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- **Coverage Source**: Uses V8 coverage (native, no instrumentation needed)
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- **Performance**: ~5-10% overhead compared to tests without coverage
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- **Sharding**: When running sharded tests in CI, coverage files must be merged
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- **LCOV Merge**: Use `lcov -a file1.info -a file2.info -o merged.info` to merge
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---
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**Last Updated**: 2026-01-18
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**Maintained by**: Charon Project Team
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