Implements bd-42: Add test coverage for auto-flush feature
Created cmd/bd/main_test.go with 11 comprehensive test functions:
- TestAutoFlushDirtyMarking: Verifies markDirtyAndScheduleFlush() marks DB as dirty
- TestAutoFlushDisabled: Tests --no-auto-flush flag disables feature
- TestAutoFlushDebounce: Tests rapid operations result in single flush
- TestAutoFlushClearState: Tests clearAutoFlushState() resets state
- TestAutoFlushOnExit: Tests flush happens on program exit
- TestAutoFlushConcurrency: Tests concurrent operations don't cause races
- TestAutoFlushStoreInactive: Tests flush skips when store is inactive
- TestAutoFlushJSONLContent: Tests flushed JSONL has correct content
- TestAutoFlushErrorHandling: Tests error scenarios (permissions, etc.)
- TestAutoImportIfNewer: Tests auto-import when JSONL is newer than DB
- TestAutoImportDisabled: Tests --no-auto-import flag disables auto-import
Coverage results:
- markDirtyAndScheduleFlush: 100%
- clearAutoFlushState: 100%
- flushToJSONL: 67.6%
- autoImportIfNewer: 66.1% (up from 0%)
All tests pass. Auto-flush feature is now thoroughly tested.
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Co-Authored-By: Claude <noreply@anthropic.com>
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