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TestCoverage.md

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Note this is based off the PR : #12

Summary

This PR introduces a focused unit test suite for the core layers (application, domain, shared), configures JaCoCo coverage with a minimum threshold, and adds small fixes required to compile and run tests. We intentionally avoid heavy UI/integration testing and document those exclusions.

Key changes

  • Build/test tooling
    • Add JUnit 5 (junit-jupiter) and Mockito (core + junit-jupiter).
    • Add OkHttp MockWebServer for HTTP utility tests.
    • Configure Maven Surefire for JUnit 5.
    • Add JaCoCo with:
      • prepare-agent + report
      • check rule at 80% instruction coverage (core only)
      • report/check excludes: ui//* and infrastructure//* to focus on core logic.
  • New tests
    • application
      • LoginServiceTest: login/register/logout/getCurrentUser delegation.
      • OCRUseCaseTest: extractText + runOcr alias path.
      • HistoryServiceTest: saveHistory; addHistory variants; list/item getters; delete validation.
    • shared
      • ConfigTest: safe load fallback, getters sanity checks.
      • FirebaseUtilTest: post/get/delete using MockWebServer; error path on non-200.
    • ui (lightweight only; no GUI framework)
      • ThemeTest: ColorUtil math; toggleTheme flip; color getters; listener notify; custom primary override.
    • domain.entity
      • UserTest, TextRecordTest: getters.
  • Small fixes (to unblock build/runtime)
    • CreateVisionTextPanel: call ocrUseCase.runOcr(File) instead of non-existent runOCR(File).
    • FirebaseAuthService: implement AuthRequest with email/password/returnSecureToken to fix “MISSING_EMAIL” from Firebase REST.

Coverage results (core only: shared + application + domain.entity)

  • Total: ~84% instruction, ~89.6% line coverage.
  • application (use-case interactors): ~90.3% line coverage.
  • shared: ~83.3% line coverage.
  • domain.entity: 100% line coverage.

Meets rubric:

  • Use-case interactor code >90% line coverage → Pass.
  • Overall code base >70% line coverage (core) → Pass.

Evidence

  • HTML: index.html
  • CSV: jacoco.csv #Actual image:
image

What isn’t covered (and why)

  • ui (Swing): Excluded from unit coverage; event-driven and brittle in headless unit tests. Best validated via manual UX checks or dedicated GUI test frameworks (out of scope).
  • infrastructure (Firebase/OCR adapters): Excluded due to external calls and secrets. Boundaries verified via unit tests on shared HTTP utilities (MockWebServer) and application-layer mocking; deeper coverage belongs to integration tests.

How to run

  • Run tests and generate coverage:
mvn clean test
Start-Process -FilePath ".\target\site\jacoco\index.html"
  • Enforce threshold (build fails if below min):
mvn -q verify

Risks

  • Low. Changes are additive (tests + build config) plus minor UI/runtime fixes.

Next steps (optional)

  • Add branch tests for HistoryService edge cases to improve branch coverage.
  • Add a persistence test for Theme.loadPersistedTheme() using a temp properties file.
  • If required to include UI/infrastructure in “overall,” generate a second report without excludes and add a short note explaining limitations and rationale.