user-system/docs/evidence/ops/2026-03-28/quality/COVERAGE_REMEDIATION_20260328-142248.md

2026-03-28 Q-004 Coverage Remediation Pass 22

Scope

• Continue strict Q-004 closure work after Pass 21.
• Fully close the remaining ImportExportPage hotspot in:
  • frontend/admin/src/pages/admin/ImportExportPage/ImportExportPage.tsx
• Re-verify closure through targeted page tests and full frontend validation.

Changes

Frontend

• Expanded page-level coverage in:
  • frontend/admin/src/pages/admin/ImportExportPage/ImportExportPage.test.tsx
• Newly covered behavior includes:
  • import template download success with the default format
  • import format switching and template download failure handling
  • unsupported file-type rejection
  • oversized file rejection before the service call
  • supported import failure handling
  • successful CSV import summary rendering
  • XLSX import warning-state rendering with backend row errors
  • import-flow reset after a completed run
  • export empty-field guard
  • export field selection updates
  • export submission with keyword present
  • export submission with keyword omitted
  • export failure handling
• The test file now also shields rc-table from jsdom's unsupported pseudo-element getComputedStyle path so the page-level test no longer introduces that extra noise.

Backend

• No backend code changes were required in this pass.

Verified Commands

cd D:\project\frontend\admin
npm.cmd run test:run -- src/pages/admin/ImportExportPage/ImportExportPage.test.tsx
npm.cmd run lint
npm.cmd run build
npm.cmd run test:coverage

Results

Frontend coverage

• Overall:
  • statements 93.56%
  • branches 81.95%
  • functions 90.93%
  • lines 93.71%
• Target area:
  • src/pages/admin/ImportExportPage/ImportExportPage.tsx: statements 100%, branches 100%, functions 100%, lines 100%

Validation outcomes

• Targeted page validation passed:
  • 1 passing test file
  • 8 passing tests
• Full frontend coverage run now completes with:
  • 51 passing test files
  • 242 passing tests
• The required sequential frontend validation path passed:
  • test:run -- src/pages/admin/ImportExportPage/ImportExportPage.test.tsx
  • lint
  • build
  • test:coverage

Validation Notes

• The successful frontend coverage run still emits post-summary jsdom AggregateError network-noise lines.
  • The command exits with code 0.
  • This remains a real validation-hygiene issue and cannot be hidden or described as a fully clean run.
• The ImportExportPage test no longer emits the extra jsdom window.getComputedStyle(..., pseudoElt) noise that appeared during the first draft of this pass.

Real Conclusion

• src/pages/admin/ImportExportPage/ImportExportPage.tsx is no longer an open Q-004 gap.
• Q-004 still cannot be honestly declared closed.
• After this pass, the remaining higher-value frontend gaps narrow further to:
  • src/pages/NotFoundPage/NotFoundPage.tsx
  • src/lib/hooks/useBreadcrumbs.ts
  • src/app/providers/ThemeProvider.tsx
  • the post-summary jsdom AggregateError coverage-noise hygiene issue