kora-testing-junit-javalisted

# Kora Testing JUnit (Java) > **Kora sub-skill — obey the [kora-v1 meta rules](../../SKILL.md) on every task:** **R0** ensure `.kora-agent/` docs+examples are cloned · **R1** read this sub-skill before writing code · **R2** Kora APIs only — no Spring/Micronaut/Quarkus, no invented annotations or config keys · **R3** journal any incorrect Kora usage. Add comments/Javadoc only if asked. In-process JUnit 5 tests for **Java** Kora services. `@KoraAppTest` builds a trimmed version of your compile-time dependency graph, then injects the components you ask for with `@TestComponent`. The same code that runs in production is exercised in the test; selected dependencies can be replaced by mocks or test-only components. Kora supports three test levels: - **Component test** — one component plus the dependencies needed to build it. - **Inter-component test** — several real components interacting. - **Integration test** — real components plus external systems (PostgreSQL, Kafka) via Testcontainers. For end-to-end confidence the Kora maintainers also recommend black-box testing of the packaged image (see the `kora-testing-blackbox` skill). --- ## Quick Start ### Dependencies ```groovy dependencies { koraBom platform("ru.tinkoff.kora:kora-parent:1.2.19") annotationProcessor "ru.tinkoff.kora:annotation-processors" testImplementation platform("org.junit:junit-bom:5.13.4") testImplementation "org.junit.jupiter:junit-jupiter" testImplementation "ru.tinkoff.kora:tes