TRAINING PROJECT

Java testing & TDD feature delivery (Parkit)

Bug fixes, TDD unit tests and JUnit integration tests for the Park'it application at Move'it.

Context

Move'it is developing Park'it, an automated parking payment system. The previous developer, Tek, left several critical bugs and unimplemented features. Mission: fix the existing errors, deliver 2 new features using strict TDD, and reach test coverage above 70% validated by JaCoCo and Surefire.

Problem Scope

Critical bug: incorrect duration calculation for stays over 24h (producing negative values)
Missing feature: first 30 minutes of parking free of charge
Missing feature: 5% recurring customer discount
Insufficient test coverage on ParkingService
No integration tests against the real database

Solution & Deliverables

Duration bug fix: replaced broken calculation logic for stays exceeding 24h
TDD Feature 1: tests written first → price = 0 for parking stays under 30 minutes
TDD Feature 2: tests written first → 5% discount applied after license plate lookup
ParkingService unit tests with Mockito — coverage above 90%
ParkingDatabaseIT integration tests on real database — global coverage above 70%
JaCoCo and Surefire reports generated and validated by jury

Stack & Technologies

Java + Maven — build and dependency management
JUnit 5 — unit testing framework
Mockito — mocks (TicketDAO, ParkingSpotDAO, InputReaderUtil)
JaCoCo — code coverage report
Surefire — test execution report
MySQL — database for integration tests
Git — versioning with feature/fix branches

Project Timeline

1
Code analysis
Review of existing project, identification of duration bug and missing features
2
Bug fix
Fixed negative duration calculation for parking stays over 24 hours
3
TDD Feature 1
Tests written first → implemented free 30-minute stay rule
4
TDD Feature 2
Tests written first → implemented 5% recurring user discount with plate lookup
5
Unit tests
Mockito mocks on ParkingService — coverage above 90%