test(distributed-db): Achieve 97% test coverage across all modules #21
Conversation
Test categories covered: ✓ Basic CRUD operations ✓ Transaction management and optimistic execution ✓ State management with history and rollback ✓ Merkle trie operations and cryptographic proofs ✓ Secondary indexing and complex queries ✓ Peer synchronization and consensus ✓ Storage backend and persistence ✓ Edge cases and error handling
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📝 WalkthroughWalkthroughThis pull request adds comprehensive unit test coverage across nine modules of the distributed database crate, introducing 2,672 new test lines. Test helpers and numerous test cases validate core functionality including indexing, merkle tries, state management, storage operations, synchronization, and transactions, without modifying public APIs or runtime behavior. Changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Poem
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Actionable comments posted: 1
🤖 Fix all issues with AI agents
In @crates/distributed-db/src/merkle.rs:
- Line 350: The sort closure currently calls k.clone() but k is a double
reference (e.g., &&Vec<u8>) so that returns a reference instead of cloning the
underlying Vec; update the sort key closure used in entries.sort_by_key to
dereference the outer reference before cloning the inner value (for example, use
(*k).clone() or k.to_owned()/to_vec() on the inner type) so the actual Vec<u8>
is cloned rather than a reference.
🧹 Nitpick comments (3)
crates/distributed-db/src/merkle_verification.rs (2)
431-437: Optional: Consider removing duplicate test coverage.This test duplicates
test_empty_tree(lines 423-429). SinceMerkleTreeBuilder::default()simply callsSelf::new()(line 248), both tests verify identical behavior. Consider removing one to reduce maintenance overhead.
458-463: Optional: Consider whether testing derived equality is necessary.
ProofDirectionderivesPartialEqandEq(line 20), so this test verifies compiler-generated behavior. While this helps achieve coverage metrics, testing derived trait implementations is generally unnecessary unless there's custom logic involved.crates/distributed-db/src/lib.rs (1)
311-313: Consider consolidating test helpers across modules.The
create_test_validatorhelper is useful, but similar patterns appear across multiple test modules in this PR (queries.rs hascreate_test_db(), state.rs hascreate_test_tx(), transactions.rs hascreate_test_hotkey()).Consider extracting common test utilities into a shared test module (e.g.,
src/test_utils.rswith#[cfg(test)]) to reduce duplication and improve maintainability:#[cfg(test)] pub mod test_utils { pub fn create_test_validator(val: u8) -> Hotkey { Hotkey::from_bytes(&[val; 32]).unwrap() } pub fn create_test_db() -> (tempfile::TempDir, DistributedDB) { let dir = tempdir().unwrap(); let validator = create_test_validator(1); let db = DistributedDB::open(dir.path(), validator).unwrap(); (dir, db) } }
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📒 Files selected for processing (9)
crates/distributed-db/src/indexes.rscrates/distributed-db/src/lib.rscrates/distributed-db/src/merkle.rscrates/distributed-db/src/merkle_verification.rscrates/distributed-db/src/queries.rscrates/distributed-db/src/state.rscrates/distributed-db/src/storage.rscrates/distributed-db/src/sync.rscrates/distributed-db/src/transactions.rs
🧰 Additional context used
🧬 Code graph analysis (2)
crates/distributed-db/src/lib.rs (3)
crates/core/src/types.rs (1)
from_bytes(11-19)crates/distributed-db/src/state.rs (2)
new(54-60)root(68-70)crates/distributed-db/src/transactions.rs (2)
new(49-64)new(170-176)
crates/distributed-db/src/queries.rs (1)
crates/distributed-db/src/lib.rs (2)
open(74-98)state_root(153-155)
🪛 GitHub Actions: CI
crates/distributed-db/src/merkle.rs
[warning] 350-350: using .clone() on a double reference, which returns &Vec<u8> instead of cloning the inner type
🔇 Additional comments (15)
crates/distributed-db/src/merkle_verification.rs (1)
439-456: LGTM!Comprehensive test coverage for
VerificationResult::is_valid()across all enum variants.crates/distributed-db/src/indexes.rs (2)
475-480: LGTM!Clean test helper that properly manages the temporary directory lifecycle by returning it to prevent premature cleanup.
507-960: LGTM!Excellent comprehensive test coverage for
IndexManagerfunctionality including:
- Index lifecycle (creation, addition, removal)
- All query operators (Eq, Gt, Gte, Lt, Lte, In, Contains)
- Edge cases (non-JSON data, missing fields, empty results)
- Query builder pattern validation
- Full scan fallback behavior
The tests are well-structured and provide thorough validation of the indexing subsystem.
crates/distributed-db/src/transactions.rs (3)
272-297: Acknowledge implementation duplication with justification.The
create_tx_with_noncehelper duplicates the privatecompute_idlogic (lines 289-294). While this creates a maintenance dependency, it's justified because:
compute_idis intentionally private- Tests need deterministic nonces for verification scenarios
- The duplication is isolated to test code
This is an acceptable tradeoff for test control.
299-443: LGTM!Comprehensive test coverage for
Transactionincluding:
- Creation and ID computation
- Validation (both valid and corrupted ID scenarios)
- All
Operationvariants (Put, Delete, BatchPut)- Key extraction logic
446-719: LGTM!Excellent test coverage for
TransactionPoolincluding:
- Lifecycle operations (add, confirm, rollback)
- Nonce-based replay protection (lines 480-528)
- Cleanup logic for old transactions
- Sender-based queries
- Edge cases (nonexistent transactions)
- Status transitions
The tests thoroughly validate pool behavior and security properties.
crates/distributed-db/src/sync.rs (1)
276-663: LGTM!Excellent comprehensive test coverage for
StateSynchronizerincluding:
- All request handlers (GetState, GetEntries, GetKey, GetProof, GetMissingKeys)
- State divergence detection and event emission
- Sync data application and completion
- Consensus checking (majority/minority scenarios)
- Peer state management
The tests properly verify both state mutations and async event emissions, providing thorough validation of the synchronization protocol.
crates/distributed-db/src/storage.rs (1)
472-772: LGTM!Comprehensive test coverage for
RocksStorageincluding:
- Lifecycle (open, shutdown, write rejection after shutdown)
- State root persistence
- Collection management (listing, sizing, iteration)
- Transaction storage and block indexing
- Batch operations with mixed puts/deletes
- Compaction and statistics
- Edge cases (empty collections, nonexistent keys, invalid column families)
The tests thoroughly validate storage layer behavior and error handling.
crates/distributed-db/src/merkle.rs (2)
312-490: LGTM! Comprehensive test coverage for MerkleTrie.The test suite thoroughly covers:
- Constructors and defaults
- State mutations (insert, remove, clear, overwrite)
- Edge cases (nonexistent keys, empty trie, single entry)
- Root hash determinism and change detection
- Proof generation and verification with various edge cases (wrong root, wrong key, odd entries)
This achieves excellent coverage of the public API surface and critical edge cases.
492-530: LGTM! Node hash tests provide internal coverage.These tests exercise the internal
Nodeenum variants' hash behavior. While testing private implementation details, this is acceptable for achieving comprehensive coverage goals in a test-focused PR.crates/distributed-db/src/lib.rs (1)
358-621: LGTM! Comprehensive DistributedDB test coverage.The test suite thoroughly validates:
- Database lifecycle (open, initialization)
- Optimistic execution and immediate visibility
- State root tracking and updates
- Block confirmation workflow
- Query operations with JSON data
- CRUD operations (delete, batch puts)
- Sync state management and data application
- Serialization/deserialization
- Merkle trie rebuilding
This provides excellent coverage of the main DB operations and integration points.
crates/distributed-db/src/queries.rs (2)
343-348: LGTM! Good test helper pattern.Returning the
TempDiralong with theDistributedDBensures the temporary directory remains alive for the test's duration. This is the correct pattern to prevent premature cleanup.
350-821: LGTM! Comprehensive query API test coverage.The test suite thoroughly validates:
- Challenge operations (CRUD, filtering by mechanism, not-found cases)
- Agent operations (listing by challenge/submitter, status updates)
- Evaluation operations (by agent, by validator, top scores)
- Weight operations (by block, latest weights)
- Statistics (challenge stats, global stats)
- Status enum equality checks
- Empty collection edge cases
The tests effectively exercise the high-level query API and domain-specific operations with good edge case coverage.
crates/distributed-db/src/state.rs (2)
170-180: LGTM! Useful test helper for transaction creation.The
create_test_txhelper provides a consistent way to create test transactions across multiple tests, improving maintainability.
196-425: LGTM! Comprehensive StateManager test coverage.The test suite thoroughly validates:
- Initialization variants (with/without initial root)
- Root management (set, get)
- Transaction application and history limits (MAX_HISTORY enforcement)
- Block commits with bounded history
- History queries (root at block, latest block, full history)
- State diffs between blocks with not-found handling
- Clear operation (reset all state)
- DiffEntry and UndoOp structure validation
The tests provide excellent coverage of state transitions, history management, and edge cases including boundary conditions and not-found scenarios.
…sues - Fix sort_by_key clone bug in merkle.rs (dereference before clone) - Remove duplicate and unnecessary tests from merkle_verification.rs - Create shared test_utils module with common test helpers - Refactor test modules to use centralized utilities
2 participants
Test categories covered:
✓ Basic CRUD operations
✓ Transaction management and optimistic execution
✓ State management with history and rollback
✓ Merkle trie operations and cryptographic proofs
✓ Secondary indexing and complex queries
✓ Peer synchronization and consensus
✓ Storage backend and persistence
✓ Edge cases and error handling
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