show-dont-tell/java/README.md

Show, Don't Tell — Java exercise workspace

Java track for the "Show, Don't Tell — Using Examples with Coding Agents" exercise (Java 21 / Maven / JUnit 5 / AssertJ).

Prerequisites

• Java 21 (Temurin) and Maven, versions pinned in mise.toml
• If you use mise: mise install installs both

Build and run the tests

mvn test

Layout

Module	Contents
order-domain, order-tests	Order domain with discount behaviour, and its tests (Round 1)
order-book-domain, order-book-tests	OrderBook state machine, and its integration tests (Round 2)

The exercise starts in its START state: all tests are green, the refactoring participants should do is NOT applied. The custom matcher example lives in order-tests (OrderStateAssertion).