03ab36149e
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014aUaQeLnwbb1zTpN7kHeat
68 lines
3.0 KiB
Markdown
68 lines
3.0 KiB
Markdown
# 1. Goal
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A car park operator calculates the parking fee of a car. The calculation uses
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the entry time and the exit time of the car. A payment terminal calls the
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calculation before it charges the driver. The terminal needs the fee and a
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reason code for each parking event.
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# 2. Open questions
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None.
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# 3. Context
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- The interface {{P}}IF_PARK_FEE exists in package $TMP. It is active.
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- The interface contains the type TY_AMOUNT (a packed number, length 8, 2
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decimals), the type TY_REASON (a character field, length 10), the structure
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TY_RESULT with the components REASON (TY_REASON) and FEE (TY_AMOUNT), and the
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constant structure C_REASON with the components OK, BAD_TIME and TOO_LONG.
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- The interface contains one method:
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CALCULATE
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IMPORTING iv_entry_date TYPE d
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iv_entry_time TYPE t
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iv_exit_date TYPE d
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iv_exit_time TYPE t
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iv_lost_ticket TYPE abap_bool
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iv_discount TYPE abap_bool
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RETURNING VALUE(rs_result) TYPE ty_result.
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# 4. Contract
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- Create the class {{P}}PARK_FEE_CALCULATOR in package $TMP.
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- The class is public and final. It has a public constructor without
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parameters.
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- The class implements the interface {{P}}IF_PARK_FEE.
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- Do not add other public methods.
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# 5. Business rules
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The method CALCULATE applies the rules in this sequence. It returns the reason
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and the fee of the first rule that applies.
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1. The duration is the number of whole minutes between the entry and the exit.
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Ignore the seconds of the two time fields. Example: the entry 10:00:30 and
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the exit 10:01:20 give the duration 1 minute. The entry 10:00:00 and the
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exit 10:30:00 give the duration 30 minutes.
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2. If the exit is before the entry, return the reason BAD_TIME and the fee
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0.00.
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3. If the duration is more than 43200 minutes, return the reason TOO_LONG and
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the fee 0.00.
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4. If the ticket is lost (iv_lost_ticket = abap_true), the fee is 45.00 and the
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reason is OK. Rules 5 to 9 do not apply.
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5. If the duration is 15 minutes or less, the fee is 0.00 and the reason is OK.
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6. If the entry date is a Sunday, the fee is 0.00 and the reason is OK.
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7. Else the fee is the number of started hours multiplied by 2.50. A started
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hour is a full hour or a part of an hour. Example: 61 minutes are 2 started
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hours and give the fee 5.00. 30 minutes are 1 started hour and give the fee
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2.50.
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8. If the driver uses the discount card (iv_discount = abap_true), reduce the
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fee by 25 percent. Round the result to 2 decimals, half up. Example: the fee
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5.00 becomes 3.75. The fee 2.50 becomes 1.88.
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9. The fee never exceeds 60.00. If the fee is higher, it is 60.00.
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10. The reason is OK.
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# 6. Constraints
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- Release target: 8.16.
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- Coding standards: Clean ABAP. Keep every method below 40 statements. Do not
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use global variables. Do not write comments that restate the code.
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- Out of scope: do not change the interface {{P}}IF_PARK_FEE.
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# 7. Acceptance
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- The class is active and has no syntax error.
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- The hidden tests pass.
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- Write your own ABAP Unit tests for the class.
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