abap-llm/tasks_gen/eval/G0163/spec.md

1. Goal

A bank charges interest on the overdrawn part of a current account. The bank needs one calculation that returns the interest of one account for one period.

2. Open questions

None.

3. Context

• All objects are in package $TMP.
• The interface {{P}}IF_OVERDRAFT exists in package $TMP. It is active.
• The interface contains the types TY_AMOUNT (packed number, length 15, two decimals) and TY_SEGMENT (character, length 1), the constants C_SEGMENT_PRIVATE (value 'P'), C_SEGMENT_BUSINESS (value 'B') and C_MIN_INTEREST (value 5.00), and one method: CALCULATE IMPORTING iv_amount TYPE ty_amount iv_days TYPE i iv_segment TYPE ty_segment RETURNING VALUE(rv_interest) TYPE ty_amount.

4. Contract

• Create the class {{P}}OVERDRAFT_CALC in package $TMP.
• The class is public and final. It implements {{P}}IF_OVERDRAFT.
• The class can be created without parameters.
• Do not add other public methods or attributes.

5. Business rules

Apply the rules in this sequence.

1. If iv_amount is zero or negative, or if iv_days is zero or negative, return 0.00.
2. The first three days of the period carry no interest. The chargeable days are iv_days minus 3. If this value is negative, the chargeable days are 0.
3. The whole amount uses one annual interest rate. The rate depends on the amount:
   • amount up to and including 1,000.00: 12.00 per cent
   • amount up to and including 5,000.00: 10.00 per cent
   • amount up to and including 20,000.00: 8.00 per cent
   • amount above 20,000.00: 6.50 per cent
4. If iv_segment is 'B', subtract 2.00 percentage points from the rate. The rate never falls below 5.00 per cent. Every other value of iv_segment leaves the rate unchanged.
5. The interest is the exact value of amount * (rate / 100) * (chargeable days / 360). Do not round intermediate results. Round only the final interest to 2 decimals. Round half away from zero.
6. If the rounded interest is greater than 0.00 and less than 5.00, the interest is 5.00.
7. Return the interest.

6. Constraints

• Release target: 7.02. The code must pass the 7.02 syntax check. Do not use language elements that are newer than release 7.02. Examples of forbidden elements are inline declarations, constructor expressions and table expressions.
• Coding standards: Clean ABAP. Methods below 40 statements. No global variables.
• Out of scope: do not change {{P}}IF_OVERDRAFT.

7. Acceptance

• The class is active and has no syntax error.
• The hidden tests pass.
• Write your own ABAP Unit tests for the class.