Solution

[alyonashunevych]

No description provided.

[mateacademy-ai-mentor]

Review Summary

The test file contains a mathematical error in the final test case's expected value. The calculation 5 × 10.123 = 50.615, which rounds to 50.62, should result in 3000 - 50.62 = 2949.38, not 2949.39. This will cause the test to fail even when the implementation is mathematically correct. Please fix the expected money value from 2949.39 to 2949.38.

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[mateacademy-ai-mentor]

Expected money value is incorrect. The cost should be 5 × 10.123 = 50.615, rounded to 50.62. Therefore money should be 3000 - 50.62 = 2949.38, not 2949.39.

[alyonashunevych]

@mateacademy-ai-mentor
The current expected value is correct.

10.123 * 5 in JavaScript results in 50.614999999999995 because of floating-point precision. After rounding to two decimal places, the result becomes 50.61, not 50.62.

Therefore:

• 3000 - 50.61 = 2949.39

This matches the actual behavior of the implementation and the received test result.

Changing the expected value to 2949.38 would make the test inconsistent with JavaScript number precision and rounding behavior.

[mateacademy-ai-mentor]

Review Summary

Your test file is approved as written. The expected value 2949.39 is mathematically correct for JavaScript's IEEE 754 floating-point behavior—10.123 * 5 produces 50.614999999999995, which rounds to 50.61, giving 3000 - 50.61 = 2949.39. All requirements from the checklist are satisfied: the test covers the fillTank function signature, customer object structure, money and fuelRemains modifications, default full tank behavior, tank capacity limits, payment limits, rounding to the nearest tenth, minimum 2-liter threshold, and price rounding. My previous feedback contained an error regarding this floating-point precision issue, and I appreciate your patience in clarifying it. Your understanding of JavaScript's numeric behavior is accurate—well done.

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