musfiqurr661/sqa-test-parking-system-testpart_v2

1. Repository purpose

- This is not a production parking app; it is a Java codebase for a unit-testing assignment around a parking-slot booking domain with intentional defects.

- The main “product” is the set of domain classes in src/, and the main deliverable is the JUnit 5 test suite in test/.

2. Core domain model

- The architecture is centered on five business objects: Vehicle, Wallet, ParkingSlot, Booking, and ParkingSystem.

- Two enums, VehicleType and ParkingSlotType, define the controlled categories used by the model.

- A third enum, BookingStatus, likely captures booking lifecycle states.

3. Object boundaries

- Vehicle represents the customer’s vehicle identity/classification.

- Wallet represents stored balance and payment-related behavior.

- ParkingSlot represents a physical parking resource with type and occupancy state.

- Booking links a vehicle to a slot and tracks reservation status.

- ParkingSystem is the orchestration layer that coordinates slots, bookings, and billing-like behavior.

4. Expected data flow

- A typical flow is: create a Vehicle → check/allocate an appropriate ParkingSlot via ParkingSystem → create a Booking → update slot and booking status → potentially charge or deduct from Wallet.

- The model is likely stateful: slot availability, booking status, and wallet balance are all mutable and interact through method calls.

5. Service/orchestration boundary

- ParkingSystem is the main boundary between business rules and the rest of the application.

- It likely owns the booking workflow: slot selection, validation of vehicle/slot compatibility, reservation, and release/cancellation logic.

- If there are defects, they are likely to surface here because it aggregates the other entities.

6. Supporting value types

- The enum classes define architectural constraints and reduce invalid states:

- VehicleType constrains what kind of vehicles exist.

- ParkingSlotType constrains slot categories.

- BookingStatus constrains booking lifecycle transitions.

- These types are important for diagrams because they represent shared rules used across multiple classes.

7. Test architecture

- The test/ directory mirrors the source model with one test file per class: VehicleTest, WalletTest, ParkingSlotTest, BookingTest, and ParkingSystemTest.

- This indicates a class-by-class testing strategy rather than a single end-to-end suite.

- The assignment explicitly asks for tests that both validate intended behavior and expose defects.

8. Documentation/reporting layer

- documentation.md is referenced by the README as the source of assignment-specific details.

- samplereport.md and the generated *_unit_test_report.md files are reporting artifacts, not runtime components.

- These files matter as part of the deliverable process, but they do not participate in application execution.

9. Static/global-state concern

- The README warns about order independence and static global state, which implies some classes may share mutable state across tests or instances.

- For an architecture diagram, this means the system may not be purely stateless; there may be class-level state inside ParkingSystem or related classes that affects test isolation.

10. Technology/runtime boundary

- The repository is a plain Java project with JUnit 5 tests.

- There is no evidence of web, database, messaging, or external-service integration in the repository structure.

- The architecture is therefore a local in-memory domain model plus tests.

11. Likely responsibility separation

- Vehicle, Wallet, ParkingSlot, and Booking are domain entities/value objects.

- ParkingSystem is the application/domain service that applies business rules.

- The enums are shared constants that provide type safety and rule enforcement.

12. What to show in an architecture diagram

- Show ParkingSystem at the center, connected to Vehicle, ParkingSlot, Booking, and Wallet.

- Show VehicleType, ParkingSlotType, and BookingStatus as shared classifiers used by the entities.

- Show test/ as a separate boundary that depends on all source classes but does not feed back into them.

- Show the documentation/report files as non-executable artifacts alongside the codebase.

13. Main repository boundary

- The entire repository is self-contained: source code, tests, and assignment documentation all live in the same project.

- The only meaningful dependency boundary is from tests to production classes; there are no external system integrations visible in the tree.