Add comprehensive tests for AuthenticatorRepositoryImpl

[SaintPatrck]

🎟️ Tracking

Test coverage improvements for critical authenticator repository functionality.

📔 Objective

This PR enhances test coverage for AuthenticatorRepositoryImpl, a critical component responsible for managing authenticator data persistence and retrieval in the Authenticator application.

Changes:

• Comprehensive test suite additions for AuthenticatorRepositoryImpl
• Cleanup of unnecessary test utilities in FakeAuthenticatorDiskSource
• Full validation of repository CRUD operations, Flow emissions, and error handling
• Edge case testing for concurrent operations and state management

The repository layer serves as the primary data access abstraction for authenticator items. These tests ensure data integrity, proper Flow behavior, and correct error propagation throughout the data layer.

📸 Screenshots

N/A - Test-only changes

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

🤖 Generated with Claude Code

[github-actions]

Checkmarx One – Scan Summary & Details – 62c85399-fd3d-4fd3-929a-93d8478e8373

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.88%. Comparing base (954571f) to head (ea358b5).
⚠️ Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6424      +/-   ##
==========================================
+ Coverage   84.94%   85.88%   +0.94%     
==========================================
  Files         982      775     -207     
  Lines       59263    56164    -3099     
  Branches     8231     8130     -101     
==========================================
- Hits        50340    48236    -2104     
+ Misses       6066     5097     -969     
+ Partials     2857     2831      -26     

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[claude]

Claude finished @SaintPatrck's task in 1m 26s —— View job

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Code Review Summary

Overall Assessment: 👍 Good test coverage additions with a few items to address from existing review comments.

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Changes Overview

This PR adds comprehensive test coverage for AuthenticatorRepositoryImpl, including:

• CRUD operations (createItem, addItems, hardDeleteItem)
• Flow behavior (ciphersStateFlow, sharedCodesStateFlow, getItemStateFlow, totpCodeFlow)
• Export functionality (JSON and CSV formats)
• Import functionality with success/failure paths
• First-time account sync flow behavior

The FakeAuthenticatorDiskSource was improved to use bufferedMutableSharedFlow and emit stored items on subscription, which is the correct pattern for testing.

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Review Feedback

✅ Strengths

1. Good test coverage - Tests cover success and error paths for all major repository operations
2. Proper use of Turbine - Flow testing is done correctly with test { } blocks
3. FakeAuthenticatorDiskSource improvement - Using bufferedMutableSharedFlow with onSubscription is the right pattern for reliable test behavior
4. MockK setup - The Uri.Builder mocking for export tests is thorough

⚠️ Items to Address (from existing review comments)

1. Missing Initial State Test (david-livefront's comment)

The removed test for ciphersStateFlow initial state should be loading was valid. Looking at AuthenticatorRepositoryImpl.kt:124-125, the init block explicitly sets DataState.Loading on start:

.onStart {
    mutableCiphersStateFlow.value = DataState.Loading
}

Consider re-adding this test to verify the initial loading state is emitted correctly.

2. Assert Whole State vs. Just Data (david-livefront's 2 comments at lines where assertions occur)

The current assertions use the full DataState.Loaded(...) pattern, which appears correct. Looking at the test code:

• Line 222: assertEquals(DataState.Loaded(mockItem), awaitItem())
• Line 232-233: assertEquals(DataState.Loaded(null), awaitItem())
• Line 239: assertEquals(DataState.Loaded(null), awaitItem())

These assertions do check the whole state, not just .data. If the reviewer was referring to different lines, please clarify. The current pattern follows best practices.

📝 Minor Observations

1. Test isolation: Some tests create new AuthenticatorRepositoryImpl instances with mock disk sources to test error paths. This is a valid approach, though it does add some duplication.

2. No DataState.Loading assertions in getItemStateFlow tests: The getItemStateFlow function has initialValue = DataState.Loading (line 150-151 in impl), but tests skip straight to Loaded state. This is likely fine due to the unconfined dispatcher, but worth noting.

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Suggestions for Follow-up

🌱 Consider adding:

• Test for getLocalVerificationCodesFlow() behavior
• Test for error states in ciphersStateFlow (if applicable)
• Test verifying items are sorted alphabetically (per sortAlphabetically() call in impl)

These can be addressed in future PRs as they're not blockers.

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Verdict

The PR looks good overall. The main actionable item is addressing david-livefront's feedback about the removed initial state test and confirming the assertion patterns match their expectations.

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Tasks Completed:

• Read changed files and understand the PR changes
• Review test coverage and quality
• Check for adherence to Bitwarden coding standards
• Address existing review comments
• Post comprehensive review feedback

[david-livefront]

Shouldn't thew initial state be Loading?

[david-livefront]

What was wrong with the fake?

[SaintPatrck]

📓 Hm. The fake needed a few tweaks that Claude couldn't figure out, so it fell back to mocking like we do with VaultDiskSource in a few places. That's also why it changed the initial state test. I think we can prevent this from happening again with a few rules.

[david-livefront]

Can we just assert the whole state?

    assertEquals(
        DataState.Loaded(data = null),
        awaitItem(),
    )

[david-livefront]

Same here