test: add 100% coverage for BaseUint arithmetic operators#530
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tcoratger merged 1 commit intoleanEthereum:mainfrom Apr 7, 2026
Merged
test: add 100% coverage for BaseUint arithmetic operators#530tcoratger merged 1 commit intoleanEthereum:mainfrom
tcoratger merged 1 commit intoleanEthereum:mainfrom
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Closes leanEthereum#521. Adds 116 new tests (275 total) achieving 100% isolated coverage for types/uint.py (197 statements, 56 branches, 0 missing). Covers all previously uncovered operator paths: - Forward arithmetic type errors (__add__, __sub__, etc. with plain int) - Reverse arithmetic success paths (__radd__, __rsub__, etc.) - Exponentiation with modulo and reverse pow - Reverse divmod - Reverse bitwise delegation (__rand__, __ror__, __rxor__) - Reverse shift operators (__rlshift__, __rrshift__) - Comparison type errors (__lt__, __le__ with plain int) - __index__ returns plain int Spec audit confirms SSZ serialization, deserialization, ranges, and fixed-size properties are all correct per the SSZ specification. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
src/lean_spec/types/uint.py(197 statements, 56 branches, 0 missing)__index__Closes #521
Spec compliance audit
Cross-referenced against the SSZ specification:
No bugs found. Two design notes (not spec violations):
__pow__/shift accept plainintwhile arithmetic requiresBaseUint— pragmatic inconsistency (shift amounts are naturally plain ints)__eq__raisesTypeErroron non-BaseUint — deliberate strictness for spec code safetyTest plan
uv run pytest tests/lean_spec/types/test_uint.py -v)--cov=lean_spec.types.uint --cov-report=term-missing)uvx tox -e all-checks)🤖 Generated with Claude Code