34 lines
1.2 KiB
Markdown
34 lines
1.2 KiB
Markdown
# LocalData Testing Strategy
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## Goal
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To ensure high reliability for data persistence, security, and migration across all supported platforms (iOS and watchOS).
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## Test Suites
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### Unit Tests (`Tests/LocalDataTests/`)
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- **LocalDataTests.swift**: Core round-trip tests for each storage domain (UserDefaults, FileSystem).
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- **KeychainHelperTests.swift**: Verification of Keychain API interactions (add, update, delete, exists).
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- **EncryptionHelperTests.swift**: Round-trip tests for AES and ChaCha20 encryption/decryption with various key derivation methods.
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- **StorageCatalogTests.swift**: Validation of catalog registration, duplicate detection, and missing description checks.
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## Key Testing Patterns
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### 1. Domain Round-Trips
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Always test the full cycle: `set` -> `get` (compare) -> `remove` -> `get` (expect `notFound`).
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### 2. Migration Tests
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Simulate legacy data by writing to a "legacy" key first, then verifying that the "modern" key can retrieve and consolidate that data.
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### 3. Error Handling
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Verify that the correct `StorageError` is thrown for:
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- `notFound`
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- `unregisteredKey`
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- `dataTooLargeForSync`
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- Domain-specific failures (e.g., Keychain errors)
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## Running Tests
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Run all tests from the package root:
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```bash
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swift test
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```
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