Integrate fast-check property testing into tests for deepEquals#1018
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Integrate fast-check property testing into tests for deepEquals#1018
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- Add @fast-check/vitest and fast-check dependencies - Add property-based tests for deepEquals (reflexivity, symmetry, transitivity) - Add property-based tests for comparators (antisymmetry, transitivity, consistency) - Add tests for normalizeValue and areValuesEqual utilities - Document known edge case: deepEquals asymmetry between Date and Temporal.Duration
Previously, comparing values like `deepEquals(Date, Temporal.Duration)` and `deepEquals(Temporal.Duration, Date)` could return different results because special type checks (Date, RegExp, Map, Set, TypedArray, Temporal) only checked if `a` was the special type, not if `b` was. This fix adds symmetric checks after each special type handler: - If `b` is Date but `a` is not, return false - If `b` is RegExp but `a` is not, return false - If `b` is Map but `a` is not, return false - If `b` is Set but `a` is not, return false - If `b` is TypedArray but `a` is not, return false - If `b` is Temporal but `a` is not, return false - If `b` is Array but `a` is not, return false This ensures deepEquals is a proper equivalence relation where `deepEquals(a, b) === deepEquals(b, a)` always holds.
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Add fast-check property-based tests for additional modules: - hash.property.test.ts: Tests determinism, structural equality, property order independence, number normalization, and type distinction - cursor.property.test.ts: Tests empty input handling, single/multi-column cursor generation, operator consistency, and value preservation - pg-serializer.property.test.ts: Tests serialization round-trips for strings, numbers, bigints, booleans, dates, and arrays
Fix TypeScript type errors in cursor.property.test.ts by adding explicit type casts for nulls and stringSort parameters at usage sites.
🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The __proto__ property has special behavior in JavaScript that causes issues when used as an object key in property-based tests. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
parseFloat("-0") returns 0 (not -0), so -0 cannot round-trip through
string serialization. This is a known JavaScript edge case.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
kevin-dp
approved these changes
Jan 7, 2026
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🎉 This PR has been released! Thank you for your contribution! |
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