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Maelwalser
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springboot-tdd

Generate JUnit 5 and MockMvc tests for Spring Boot services with Testcontainers and JaCoCo.

Updated Aug 23, 2026
Search Tags:#tdd#spring-boot#testcontainers#mockmvc#junit5#mockito#jacoco
One-click install
npx skills add https://github.com/Maelwalser/claude-config --skill springboot-tdd-maelwalser
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: springboot-tdd
Source: https://github.com/Maelwalser/claude-config/tree/main/skills/springboot-tdd
Command: npx skills add https://github.com/Maelwalser/claude-config --skill springboot-tdd-maelwalser

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill provides structured test-driven development guidance for Spring Boot services to help teams produce fast, deterministic unit and integration tests and achieve high coverage, reducing regressions during feature work, bug fixes, and refactors.

Core Features & Use Cases

  • JUnit 5 unit testing patterns with Mockito for isolating service logic and using test data builders for clear fixtures.
  • Web-layer testing with MockMvc and @WebMvcTest for controller behavior and JSON assertions.
  • Integration and persistence testing with @SpringBootTest, @DataJpaTest, and Testcontainers to run realistic database-backed scenarios.
  • Coverage enforcement using JaCoCo integrated into Maven/Gradle and CI to maintain a minimum threshold.
  • Use Case: Add a new API endpoint by writing failing tests first, implement minimal code to pass, add repository tests with Testcontainers, then enforce coverage in CI.

Quick Start

Create failing JUnit 5 unit and MockMvc controller tests for the new MarketService.create endpoint, implement minimal production code until tests pass, and run the full test suite with JaCoCo coverage.

Frequently Asked Questions about springboot-tdd

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I use TDD to write reliable Spring Boot tests with JUnit 5 and Mockito?▼

Spring Boot TDD involves writing failing JUnit 5 unit tests first, using Mockito to isolate service logic and test data builders for clear fixtures, then implementing minimal production code to pass. This ensures fast, deterministic unit tests for new features and refactors.

What is the best way to test Spring Boot controllers with MockMvc?▼

The best way to test Spring Boot controllers is using @WebMvcTest with MockMvc. This web-layer testing approach verifies controller behavior and JSON assertions while isolating the web tier, ensuring your API endpoints respond correctly without loading the full application context.

How do I run Spring Boot integration tests with Testcontainers for database persistence?▼

Run realistic database-backed Spring Boot integration tests by combining @SpringBootTest, @DataJpaTest, and Testcontainers. This setup validates JPA persistence layer behavior against actual databases, ensuring your repository queries and constraints work correctly in integration scenarios.

Can I enforce JaCoCo code coverage thresholds in my Spring Boot Maven or Gradle build pipeline?▼

Yes, you can enforce minimum JaCoCo coverage thresholds by integrating it into Maven or Gradle and your CI pipeline. This maintains high coverage standards and reduces regressions during feature development, bug fixes, and refactors by failing builds that drop below required thresholds.

Does Testcontainers work with @DataJpaTest for Spring Boot repository testing?▼

Testcontainers works seamlessly with @DataJpaTest for Spring Boot persistence testing. It replaces in-memory databases with real database containers, allowing you to run realistic database-backed scenarios and validate actual SQL queries, transaction behavior, and entity mappings reliably.

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