# 1. Goal
Show the milk that each farm delivered. The cooperative wants only the farms
that delivered more than 500 litres in total. A report and an OData service
will read the result, so the calculation must be in the database, in a CDS view.

# 2. Open questions
None.

# 3. Context
- Table {{P}}FARM (farm master), package $TMP. Key: FARM_ID (CHAR 10).
  Fields: FARMER (CHAR 20), REGION (CHAR 10).
- Table {{P}}MILK (milk delivery), package $TMP. Key: FARM_ID (CHAR 10),
  DELIV_DATE (DATS). Fields: LITRES (DEC 10,1).

# 4. Contract
- Create the CDS view entity {{P}}I_MILK_TOTAL in package $TMP.
- Elements, with these names: FARM_ID (key), FARMER, TOTAL_LITRES,
  DELIVERY_COUNT.
- No authorization check (#NOT_REQUIRED).

# 5. Business rules
1. Show one row for each farm whose total litres are more than 500. A farm
   with a total of 500 litres or less must not be shown. A farm without a
   delivery must not be shown. A delivery whose farm is not in the farm
   master must not be shown.
2. TOTAL_LITRES is the sum of LITRES of all deliveries of the farm, with one
   decimal.
3. DELIVERY_COUNT is the number of deliveries of the farm.
4. FARMER is the farmer of the farm.
5. The rows are grouped by farm. There is exactly one row for each farm.

# 6. Constraints
- Release target: 8.16 (SAP_BASIS 816).
- Coding standards: Clean ABAP. No ATC priority 1 or 2 findings.
- Out of scope: do not change {{P}}FARM and {{P}}MILK.

# 7. Acceptance
- The view is active and has no syntax error.
- The hidden tests pass.
- Write ABAP Unit tests with CL_CDS_TEST_ENVIRONMENT in a global test class.