feat(visual-regression): testes visuais para todos os fields

[alinelariguet]

feat(visual-regression): testes visuais para todos os fields

Summary

Expands the visual regression testing prototype from a single component (po-input) to all 20 field components, organized in e2e/visual/fields/ mirroring the po-ui component structure. Each field has isolated test states (basic, label, label+helper, label+help-text, disabled, readonly, required, required+errorMessage, loading, etc.) rendered via a dedicated visual-app Angular application.

Key additions:

• 20 field component test suites in e2e/visual/fields/po-{component}/ with co-located component templates, TypeScript classes, and Playwright specs (~186 total visual test cases)
• CI workflow (test-visual) with: po-style branch detection (URL-encoded), baseline caching via actions/cache@v4, HTML report + test result artifacts
• Baseline caching strategy: CI generates its own baselines on first run (cache miss), then compares against cached baselines on subsequent runs. This handles the 7px height difference between local and CI Ubuntu environments for native elements like <textarea>.
• 11 basic sample-based tests for non-field components (po-button, po-table, po-accordion, etc.)

Components covered: po-input, po-decimal, po-email, po-login, po-number, po-password, po-url, po-combo, po-datepicker, po-datepicker-range, po-lookup, po-multiselect, po-select, po-textarea, po-rich-text, po-upload, po-checkbox, po-checkbox-group, po-switch, po-radio-group

Review & Testing Checklist for Human

• CI baseline caching strategy: On cache miss (any spec/HTML file change), CI regenerates ALL baselines via --update-snapshots then compares — this means the first CI run after test changes always passes. Regression detection only works on subsequent runs with unchanged test files. Verify this trade-off is acceptable or if a base-branch comparison approach is needed instead.
• Run npm run test:visual locally after npx playwright install chromium and npm run test:visual:update to verify the visual-app serves and all tests pass. Spot-check rendered states in the browser at http://localhost:4200/visual/fields/po-input-states etc.
• Verify state combinations are correct for a few field components — check that properties like p-disabled, p-readonly, [p-show-required]="true", p-field-error-message are applied correctly in the HTML templates (not bare attributes where binding is needed).
• Check CI artifacts from the test-visual job: download visual-regression-report and open index.html to review baseline screenshots. Confirm they look reasonable (no blank/broken states).
• po-style branch detection: The GitHub API call uses sed 's|/|%2F|g' to URL-encode slashes in branch names (e.g., po-button/DTHFUI-222). If other special characters are used in branch names, this may need expansion.

Notes

• Committed PNG baselines (~200 files in __snapshots__/) were generated locally (Ubuntu) and serve as reference for local dev. CI generates separate baselines due to environment rendering differences (7px height difference for <textarea>, for example).
• po-textarea has explicit p-rows="3" (the default) to enforce deterministic height, though the CI cache approach is the primary solution.
• po-rich-text disabled state has maxDiffPixelRatio: 0.05 (5% tolerance) instead of the global 0.01 (1%) due to minor rendering variations.

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Devin Session: https://totvs.devinenterprise.com/sessions/5c85ab5d7935486484961f45a8077db3
Requested by: @alinelariguet

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[devin-ai-integration]

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[devin-ai-integration]

Devin Review found 1 potential issue.

View 5 additional findings in Devin Review.

[devin-ai-integration]

🟡 CI visual regression tests always pass on cache miss due to self-comparison

When the baselines cache key doesn't match exactly (which happens whenever any *.visual.spec.ts or *.component.html file in e2e/visual/ changes), the CI workflow generates fresh baselines with --update-snapshots (line 255) and then immediately runs the tests comparing against those same just-generated baselines (line 259). Since the screenshots are compared against themselves, the tests always pass unconditionally. This means any PR that adds or modifies visual test files — including this very PR — will never detect a visual regression, even if the actual UI components have visual defects. The 186 committed baseline PNGs in __snapshots__/ are also overwritten in every CI run (either by cache restore or by --update-snapshots), so they are never used as a reference in CI.

Prompt for agents

In .github/workflows/ci.yml, the 'Generate baselines for CI environment' step (lines 253-255) regenerates ALL baselines and then the 'Run visual regression tests' step (lines 258-259) compares against these just-generated baselines, which always passes. To make the visual regression tests effective:

1. Remove the 'Generate baselines for CI environment' step entirely.
2. Remove the 'Restore visual regression baselines from cache' step and its cache configuration.
3. Rely on the committed baseline PNGs in e2e/visual/__snapshots__ as the source of truth for comparison.
4. When a developer makes an intentional visual change, they should regenerate baselines locally (npx playwright test --update-snapshots) and commit the updated PNGs.

Alternatively, if CI-specific baselines are needed (due to rendering differences between developer machines and CI), consider:
- Only generating baselines on the default branch (master/development), NOT on PRs.
- For PRs, always compare against previously cached baselines from the default branch.
- Use a cache key like 'visual-baselines-${{ runner.os }}-${{ github.event.pull_request.base.sha }}' to tie the baseline to the base branch state.

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[devin-ai-integration]

Esse trade-off é intencional e está documentado na descrição da PR. O motivo: as baselines commitadas no repo são geradas em ambiente local e possuem dimensões diferentes do CI (ex: <textarea> renderiza com 7px de diferença na altura entre Ubuntu local e GitHub Actions Ubuntu 24.04). Usar as baselines commitadas diretamente no CI sempre falharia por mismatch de dimensão.

O fluxo atual:

1. Cache miss (primeira execução ou mudança nos specs/HTML): gera baselines no ambiente CI → testes passam (self-comparison)
2. Cache hit (execuções subsequentes sem mudança nos specs): compara contra baselines cacheadas → detecta regressões causadas por mudanças em componentes/CSS

Para detecção cross-versão mais robusta (comparando PRs contra baselines da branch base), a sugestão de usar visual-baselines-${{ runner.os }}-${{ github.event.pull_request.base.sha }} é boa e pode ser implementada numa iteração futura.