Transaction Starter Project

This is the starter project for the Customer Transactions exercise.

Before you start

The first thing you should do after cloning the repository is:

Linux / macOS

./mvnw clean test

Windows

mvnw.cmd clean test

The sample test should pass before you begin implementing the exercise.

What is already provided

• Java 17
• Spring Boot
• Maven wrapper
• Spring Web
• Spring Data JPA
• H2 embedded database
• JUnit / Spring Boot Test
• A sample REST endpoint: GET /api/sample
• A sample test that loads the Spring context

Exercise

Implement these four operations:

1. Create transaction
2. Get transaction
3. Update transaction status
4. Get all transactions for a customer

You may change the surrounding design if you believe your solution is better.

Transaction fields

Every transaction contains:

• Transaction ID
• Customer ID
• Amount
• Currency
• Transaction Type
• Transaction Status

Validation rules

Define what makes a transaction valid. At minimum, consider:

• Transaction ID
• Customer ID
• Amount
• Currency
• Transaction type
• Initial status

Also explain any business validation you add beyond the annotations already supplied.

API skeleton

Create

TODO

Example:

TODO

Get

TODO

Update status

TODO

Example:

TODO

Get customer transactions

TODO

Testing expectations

Add at least four meaningful tests.

Your tests should cover more than just application startup.

You decide exactly which tests provide the best coverage.