Fix coverage with several contract classes; table annotation and file path checks; clean task dir on write

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014aUaQeLnwbb1zTpN7kHeat

tasks_gen/eval/G0105/spec.md

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+# 1. Goal
+
+A toll operator charges a fee for each truck trip on its road network. The trip
+log program calls one function module for each trip. The call happens before
+the program stores the trip. The fee depends only on the trip data that the
+caller passes.
+
+# 2. Open questions
+
+None.
+
+# 3. Context
+
+- Function group {{P}}FG_TOLL exists in package $TMP.
+- All objects of this task are in package $TMP.
+- The trip log program is not part of this task.
+
+# 4. Contract
+
+## 4.1 Function module {{P}}TOLL_FEE
+
+Create the function module {{P}}TOLL_FEE in function group {{P}}FG_TOLL.
+The interface is exactly:
+
+    IMPORTING
+      iv_distance_km  TYPE decfloat34
+      iv_weight_class TYPE i
+      iv_axles        TYPE i
+    EXPORTING
+      ev_fee          TYPE decfloat34
+    EXCEPTIONS
+      invalid_input
+
+## 4.2 Class {{P}}TOLL_CALC
+
+Create the global class {{P}}TOLL_CALC in package $TMP. The class is public and
+final. The class has a public instance constructor without parameters.
+The class has this public method:
+
+    METHODS calculate
+      IMPORTING iv_distance_km  TYPE decfloat34
+                iv_weight_class TYPE i
+                iv_axles        TYPE i
+      RETURNING VALUE(rv_fee)   TYPE decfloat34
+      RAISING   cx_abap_invalid_value.
+
+# 5. Business rules
+
+1. The distance is the length of the trip in kilometres. A distance below 0
+   is invalid input.
+2. The weight class is 1, 2, 3, or 4. Every other value is invalid input.
+3. The number of axles is 2, 3, 4, or 5. Every other value is invalid input.
+4. Invalid input raises the exception INVALID_INPUT in {{P}}TOLL_FEE and the
+   exception CX_ABAP_INVALID_VALUE in {{P}}TOLL_CALC. {{P}}TOLL_FEE does not
+   set the fee in this case.
+5. The base rate per kilometre depends on the weight class:
+   - Weight class 1: 0.10
+   - Weight class 2: 0.14
+   - Weight class 3: 0.18
+   - Weight class 4: 0.22
+6. The number of axles adds a surcharge to the base amount:
+   - 2 axles: 0 %
+   - 3 axles: 5 %
+   - 4 axles: 10 %
+   - 5 axles: 15 %
+7. The base amount is the distance multiplied by the base rate. The fee is the
+   base amount increased by the surcharge percentage. Round the fee half up to
+   2 decimals.
+8. The minimum fee is 1.00. If the fee from rule 7 is below 1.00, the fee is
+   1.00.
+9. {{P}}TOLL_FEE returns the fee that {{P}}TOLL_CALC calculates.
+
+# 6. Constraints
+
+- Release target: 7.58.
+- The calculation is pure logic. It reads no database table and no other
+  external data.
+- Out of scope: the trip log program and every object that is not in the
+  contract.
+
+# 7. Acceptance
+
+- {{P}}TOLL_FEE and {{P}}TOLL_CALC are active and have no syntax error.
+- The hidden tests pass.
+- Write ABAP Unit tests. Put local test classes in {{P}}TOLL_CALC. Write a
+  global test class for {{P}}TOLL_FEE.