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springboot-tdd

Guide test-driven development for Spring Boot applications with JUnit 5, Mockito, and Testcontainers.

Updated Aug 30, 2025
Search Tags:#tdd#spring-boot#testcontainers#mockmvc#junit5#mockito#jacoco
One-click install
npx skills add https://github.com/vonomarap/kanokna --skill springboot-tdd-vonomarap
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: springboot-tdd
Source: https://github.com/vonomarap/kanokna/tree/main/.agents/skills/springboot-tdd
Command: npx skills add https://github.com/vonomarap/kanokna --skill springboot-tdd-vonomarap

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Ensures Spring Boot services are developed and refactored safely by prescribing a test-first workflow that produces fast, deterministic unit and integration tests and reduces regressions while enforcing coverage goals.

Core Features & Use Cases

  • Unit Testing: Guidance for JUnit 5 and Mockito patterns, Arrange-Act-Assert, parameterized tests, and test data builders for isolated service logic.
  • Web Layer & Integration: MockMvc guidance for controller tests and SpringBootTest patterns with Testcontainers to validate real database interactions and full-stack behavior.
  • Persistence & CI: DataJpaTest patterns, Testcontainers configuration via DynamicPropertySource, and JaCoCo Maven integration to enforce 80%+ coverage in CI pipelines.
  • Use Case: When adding a new REST endpoint or refactoring data access, write failing-first tests, implement the minimal code to pass, and enforce coverage before merge.

Quick Start

Create failing-first JUnit 5 tests for a new Spring Boot REST endpoint, run unit and Testcontainers-backed integration tests, and confirm JaCoCo reports at least 80% coverage.

Frequently Asked Questions about springboot-tdd

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

FAQPage Schema
How do I write failing-first Spring Boot tests using JUnit 5 and Mockito?▼

Failing-first Spring Boot tests are written by following the write-fail-pass-refactor cycle, using JUnit 5 and Mockito to isolate service logic through Arrange-Act-Assert patterns and parameterized tests before implementing minimal code.

How do I test Spring Boot REST endpoints with MockMvc and Testcontainers?▼

Spring Boot REST endpoints are tested using MockMvc for controller tests and SpringBootTest patterns with Testcontainers to validate real database interactions and full-stack integration behavior across web and persistence layers.

How do I configure JaCoCo Maven coverage to enforce 80% for Spring Boot microservices?▼

JaCoCo Maven integration enforces 80%+ coverage for Spring Boot microservices by generating coverage reports in CI pipelines, ensuring unit and integration tests meet the required threshold before code merge.

When do I need Testcontainers DynamicPropertySource for Spring Boot DataJpaTest?▼

Testcontainers DynamicPropertySource is needed for Spring Boot DataJpaTest when validating real database interactions, allowing integration tests to dynamically configure database connections for accurate persistence layer verification.

Does test-driven development work for Java microservices refactoring data access?▼

Test-driven development works for Java microservices refactoring data access by prescribing a test-first workflow that produces deterministic unit and integration tests, reducing regressions and ensuring safe refactoring with high coverage.

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