test(sveta): Write tests for percentage function
Outcome: done
Changed: tests/test_calculator.py:1 (import), tests/test_calculator.py:66-96 (new TestPercentageFunction class)
Verified by: `make verify` — exit 0, Ran 23 tests, OK
Findings: tests/test_calculator.py:66-96 — TestPercentageFunction class added with 7 test methods (valid_percentage, zero_value, full_value, fractional, total_zero, float_arguments, negative_value). All 23 tests pass.
Open: none
Confidence: high — all acceptance criteria met, verification passed
Typosaurus-Run: ff52a86851934fd293e2f4493c5a9a46
Typosaurus-Node: 7edce3239d434d36aed06535aae0d0ad
Typosaurus-Agent: @sveta
Refs: #16
typosaurus
c6ff93c764