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[RomanPlyta]

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[mateacademy-ai-mentor]

Review Summary

Your test suite is approved. The tests in src/fillTank.test.js thoroughly cover the required behavior: calling fillTank with and without amount, enforcing tank capacity and customer money limits, checking object mutation instead of return values, and validating the rounding rules for both fuel quantity and price ([CHECKLIST ITEMS #1–#9, #12–#13]). Jest is used correctly with describe/it/expect, and the scenarios—including the floating-point edge case—closely mirror the specification, which shows good attention to detail ([CHECKLIST ITEMS #10–#11]). The single failing check run you saw is due to floating-point precision in the assertion at line 92 (expect(customer.money).toBe(0.99);) rather than a broken implementation; using expect(customer.money).toBeCloseTo(0.99, 2); would make this test robust against IEEE 754 quirks. Since this is a minor testing detail and not a functional blocker, it doesn’t prevent the task from being considered complete. Overall, you’ve done a solid job translating the requirements into tests; nice work.

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[mateacademy-ai-mentor]

Review Summary

Your test suite for fillTank is robust and matches all the specified behaviors: it covers omitted amount (full tank), tank capacity limits, money constraints, minimum pour amount, and the required rounding rules for both fuel volume and price. You correctly verify that fillTank mutates the customer object instead of returning a value, and you use Jest’s APIs (describe, it, expect, toBeCloseTo) appropriately, including handling floating‑point edge cases without brittle equality checks. There are no critical or blocking issues in the tests as written, and they should give clear guidance for implementing fillTank according to the task requirements. One optional improvement would be to add a small test explicitly asserting that fillTank returns undefined, which would lock in the “no return value” behavior more formally, but its absence is not a blocker. Overall, your work on the tests meets the task requirements, and you can now focus on keeping the implementation aligned with these expectations.

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