1.8 KiB
1.8 KiB
VexLens Truth Table Tests
Module
VexLens
Status
IMPLEMENTED
Description
Systematic truth table tests for VEX lattice merge correctness. Comprehensive VexLatticeTruthTableTests class covers all VEX status transition combinations with 75 tests.
Implementation Details
- Truth table tests:
src/VexLens/__Tests/StellaOps.VexLens.Tests/Consensus/VexLatticeTruthTableTests.cs-- 75 tests covering exhaustive truth table combinations - Lattice order verification: All 4 statuses verified in correct order (Affected=0, UnderInvestigation=1, Fixed=2, NotAffected=3)
- Two-statement merge: All 16 status pair combinations (4x4 matrix) with reverse order for commutativity
- Commutativity: merge(A,B) == merge(B,A) proven for 4 cross-status pairs
- Associativity: merge(merge(A,B),C) == merge(A,merge(B,C)) proven for 3 triple combinations
- Idempotency: merge(A,A) == A proven for all 4 statuses
- Weighted vote truth table: 5 cases for majority/tie resolution + weight aggregation
- Highest weight truth table: 3 cases for single highest weight selection
- Conflict detection: 4 cases for conflict/no-conflict detection
- Outcome classification: Unanimous, ConflictResolved, Majority, NoData
- Edge cases: Single statement, empty statements, all below threshold
- Determinism: Same input produces same output
- Source: Feature matrix scan + QA verification run-001
E2E Test Plan
- Verify all 16 two-statement lattice merge combinations produce correct most-conservative status
- Test commutativity: merge(A,B) equals merge(B,A) for all cross-status pairs
- Test idempotency: merge(A,A) equals A for all 4 statuses
- Test associativity: merge(merge(A,B),C) for triple combinations
- Verify weighted vote and highest weight modes
- Verify conflict detection and outcome classification