Hard batch G0022-G0026: 5/5 accepted; budget floor, CDS checks, mutation check

- generator: budget floor (2x oracle activations, 3x calls), static checks for CDS
  $parameters and UNION annotation
- harness/mutation.py: deterministic mutants of the reference; hidden tests must fail
- G0022 revalidated with harness fixes: oracle 100, null 0
- results in docs/faz1-tasarim.md 11f

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tasks_gen/eval/G0022/spec.md

@@ -0,0 +1,72 @@
+# 1. Goal
+Validate an employee expense claim before it is posted to accounting. The check
+reports the first rule that fails as a class-based exception. Each exception
+carries the value that caused the failure and a short message.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- The interface {{P}}IF_EXPENSE_CLAIM exists in package $TMP and is active. It
+  contains types only and has no methods:
+  - TY_AMOUNT, a packed number with length 8 and 2 decimals.
+  - TY_CURRENCY, a character field with length 3.
+  - TY_COST_CENTER, a character field with length 10.
+  - TY_CLAIM, a structure with the components AMOUNT (TY_AMOUNT), CURRENCY
+    (TY_CURRENCY), CLAIM_DATE (type D), COST_CENTER (TY_COST_CENTER) and
+    HAS_RECEIPT (ABAP_BOOL).
+- The class {{P}}CX_CLAIM_ERROR exists in package $TMP and is active. It is a
+  direct subclass of CX_STATIC_CHECK. Its constructor has the importing
+  parameter IV_MESSAGE (TYPE string). The method GET_MESSAGE returns this text
+  (TYPE string).
+
+# 4. Contract
+- Create the class {{P}}EXPENSE_VALIDATOR in package $TMP.
+- The class is public and final and has a public constructor without parameters.
+- The class has exactly one public method:
+  VALIDATE IMPORTING is_claim TYPE {{p}}if_expense_claim=>ty_claim
+           RAISING   {{p}}cx_claim_error.
+- Create these exception classes in package $TMP. Each one inherits from
+  {{P}}CX_CLAIM_ERROR, is final and has a public constructor.
+  - {{P}}CX_CLAIM_AMOUNT: constructor parameter IV_AMOUNT of type TY_AMOUNT of
+    {{P}}IF_EXPENSE_CLAIM. Public read-only attribute MV_AMOUNT of the same
+    type. Message: Amount must be positive
+  - {{P}}CX_CLAIM_CURRENCY: constructor parameter IV_CURRENCY of type
+    TY_CURRENCY. Public read-only attribute MV_CURRENCY of the same type.
+    Message: Currency is not supported
+  - {{P}}CX_CLAIM_DATE: constructor parameter IV_CLAIM_DATE of type D. Public
+    read-only attribute MV_CLAIM_DATE of type D. Message: Claim date is in the
+    future
+  - {{P}}CX_CLAIM_RECEIPT: constructor parameter IV_AMOUNT of type TY_AMOUNT.
+    Public read-only attribute MV_AMOUNT of the same type. Message: Receipt is
+    required
+  - {{P}}CX_CLAIM_COSTCENTER: constructor parameter IV_AMOUNT of type TY_AMOUNT.
+    Public read-only attribute MV_AMOUNT of the same type. Message: Cost center
+    is required
+- GET_MESSAGE returns the message of the exception.
+- Do not add other public methods or attributes.
+
+# 5. Business rules
+Check the claim in this sequence. Raise the exception of the first rule that
+fails. If no rule fails, the method ends without an exception.
+1. AMOUNT must be greater than zero. Else raise {{P}}CX_CLAIM_AMOUNT with
+   IV_AMOUNT = AMOUNT.
+2. CURRENCY must be one of EUR, USD, GBP, CHF. Else raise
+   {{P}}CX_CLAIM_CURRENCY with IV_CURRENCY = CURRENCY.
+3. CLAIM_DATE must not be later than the current date. Else raise
+   {{P}}CX_CLAIM_DATE with IV_CLAIM_DATE = CLAIM_DATE.
+4. If AMOUNT is 100.00 or more, HAS_RECEIPT must be true. Else raise
+   {{P}}CX_CLAIM_RECEIPT with IV_AMOUNT = AMOUNT.
+5. If AMOUNT is 1000.00 or more, COST_CENTER must not be initial. Else raise
+   {{P}}CX_CLAIM_COSTCENTER with IV_AMOUNT = AMOUNT.
+
+# 6. Constraints
+- Release target: 8.16.
+- Coding standards: Clean ABAP. Method length below 40 statements. No global
+  variables. No comment that restates the code.
+- Out of scope: do not change {{P}}IF_EXPENSE_CLAIM and {{P}}CX_CLAIM_ERROR.
+
+# 7. Acceptance
+- All objects are active and have no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for {{P}}EXPENSE_VALIDATOR.