# 1. Goal
The CDS view entity {{P}}I_TOUR_LOAD in package $TMP shows the load of the
delivery tours of a courier depot. Users report that the view gives wrong
numbers. Fix the view. The name of the view stays the same.

# 2. Open questions
None.

# 3. Context
- Table {{P}}TOUR (tour header), package $TMP. Key: TOUR_ID (CHAR 10).
  Fields: DRIVER (CHAR 10), DEPOT (CHAR 4), TOUR_DATE (DATS).
- Table {{P}}PARCEL (parcel of a tour), package $TMP. Key: TOUR_ID (CHAR 10),
  PARCEL_NO (INT4). Fields: DEST_ZONE (CHAR 4, destination zone of the
  parcel), WEIGHT (DEC 8,3).
- The CDS view entity {{P}}I_TOUR_LOAD reads the two tables.
- The view is active, but the result is wrong.

# 4. Contract
- Fix the CDS view entity {{P}}I_TOUR_LOAD in package $TMP. The object name
  stays the same.
- Elements, with these names: TOUR_ID (key), DRIVER, DEPOT, PARCEL_COUNT,
  TOTAL_WEIGHT.
- No authorization check (#NOT_REQUIRED).

# 5. Business rules
1. The view shows one row for each tour that has at least one parcel.
2. PARCEL_COUNT is the number of parcels of the tour.
3. TOTAL_WEIGHT is the sum of the weights of all parcels of the tour, with
   3 decimals.
4. The destination zone of a parcel must not change the result of the view.
   A tour with parcels in more than one zone appears exactly once.
5. All other behavior of the view stays the same.

# 6. Constraints
- Release target: SAP_BASIS 816.
- Coding standards: Clean ABAP. The view must be active and must not have a
  syntax error.
- Out of scope: do not change the tables {{P}}TOUR and {{P}}PARCEL.

# 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.