Skill

java-spring-boot-testing

Complete guide to testing in Spring Boot — unit tests with Mockito, controller tests (MockMVC standalone, @WebMvcTest, MockMvcTester, @SpringBootTest, WebTestClient), JPA repository tests, Testcontainers, Spring Cloud Contract, and stress testing. Use when writing or reviewing any Spring Boot test.

From java

Install

Run in your terminal

npx claudepluginhub wesleyegberto/software-engineering-skills --plugin java

Tool Access

This skill uses the workspace's default tool permissions.

Supporting Assets

View in Repository

references/contract-testing.md

references/controller-tests.md

references/data-jpa-test.md

references/stress-testing.md

references/test-configuration.md

references/testcontainers.md

references/unit-testing.md

Skill Content

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Last CommitMar 23, 2026

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java-spring-boot-testing

From java

When to Use This Skill

Write unit tests for services and components (JUnit 5 + Mockito)

Write controller tests: unit (standalone MockMVC) or integration (@WebMvcTest, @SpringBootTest)

Test JPA repositories with @DataJpaTest

Use Testcontainers for real database integration tests

Implement Consumer Driven Contracts with Spring Cloud Contract

Diagnose or simulate thread pool starvation

Benchmark performance with JMH

Reference Guide

Topic

Reference

Load When

Controller Tests

references/controller-tests.md

MockMVC standalone, @WebMvcTest, MockMvcTester, @SpringBootTest + MockMvc/TestRestTemplate, WebFluxTest + WebTestClient

Unit Testing

references/unit-testing.md

Service/component tests with Mockito, parameterized tests, test data builders

JPA Tests

references/data-jpa-test.md

@DataJpaTest, TestEntityManager, H2, real database, rollback, ordered tests

Testcontainers

references/testcontainers.md

PostgreSQL container, DynamicPropertySource, AbstractIntegrationTest

Test Configuration

references/test-configuration.md

application-test.yml, @TestConfiguration, TestDataFactory

Contract Testing

references/contract-testing.md

Spring Cloud Contract, Consumer Driven Contracts, WireMock stubs

Stress Testing

references/stress-testing.md

Thread pool starvation with JMeter, JMH micro-benchmarks

Testing Best Practices

Follow the AAA pattern (Arrange, Act, Assert)

Use @DisplayName for descriptive test names

Mock external dependencies in unit tests; use Testcontainers for real DB

Achieve 85%+ code coverage

Test both happy path and edge/error cases

Use @Transactional for automatic test data cleanup

Keep unit tests and integration tests in separate source sets or naming conventions

Use parameterized tests to cover multiple input scenarios

Test security rules (@WithMockUser) and input validation

Keep tests fast and independent — avoid shared mutable state

Spring Boot Testing

Guide to testing strategies and examples for Spring Boot applications.

When to Use This Skill

Write unit tests for services and components (JUnit 5 + Mockito)
Write controller tests: unit (standalone MockMVC) or integration (@WebMvcTest, @SpringBootTest)
Test JPA repositories with @DataJpaTest
Use Testcontainers for real database integration tests
Implement Consumer Driven Contracts with Spring Cloud Contract
Diagnose or simulate thread pool starvation
Benchmark performance with JMH

Reference Guide

Topic	Reference	Load When
Controller Tests	`references/controller-tests.md`	MockMVC standalone, @WebMvcTest, MockMvcTester, @SpringBootTest + MockMvc/TestRestTemplate, WebFluxTest + WebTestClient
Unit Testing	`references/unit-testing.md`	Service/component tests with Mockito, parameterized tests, test data builders
JPA Tests	`references/data-jpa-test.md`	@DataJpaTest, TestEntityManager, H2, real database, rollback, ordered tests
Testcontainers	`references/testcontainers.md`	PostgreSQL container, DynamicPropertySource, AbstractIntegrationTest
Test Configuration	`references/test-configuration.md`	application-test.yml, @TestConfiguration, TestDataFactory
Contract Testing	`references/contract-testing.md`	Spring Cloud Contract, Consumer Driven Contracts, WireMock stubs
Stress Testing	`references/stress-testing.md`	Thread pool starvation with JMeter, JMH micro-benchmarks

Testing Best Practices

Follow the AAA pattern (Arrange, Act, Assert)
Use @DisplayName for descriptive test names
Mock external dependencies in unit tests; use Testcontainers for real DB
Achieve 85%+ code coverage
Test both happy path and edge/error cases
Use @Transactional for automatic test data cleanup
Keep unit tests and integration tests in separate source sets or naming conventions
Use parameterized tests to cover multiple input scenarios
Test security rules (@WithMockUser) and input validation
Keep tests fast and independent — avoid shared mutable state