Spring Testing Fundamentals

Organization

spring-ai-community

spring-testing-fundamentals

Boot 4 renamed @MockBean to @MockitoBean, moved test slice annotations to new packages, and changed context caching behavior. Read for correct AssertJ/BDDMockito idioms and Boot 4 migration. Default fallback when no specific slice annotation is present. Triggers: assertThat, BDDMockito, ArgumentCaptor, @MockitoBean, @MockitoSpyBean, @DirtiesContext, UnnecessaryStubbingException, testing pyramid, context cache.

Overview

Publisher	spring-ai-community
Repository	`spring-testing-skills`
Skill name	`spring-testing-fundamentals`
Stars	52
Forks	2
Bundled files	2
License	Apache-2.0
Links	Skill source Repository

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
2 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by spring-ai-community on GitHub. Read the source before you install it.

Installation

Install the Spring Testing Fundamentals AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/spring-ai-community/spring-testing-skills/tree/main/skills/spring-testing-fundamentals
Enable the skill in any chat where you want it available.

Store

Installed

Skills

Add skills

Import one or more skills from a public GitHub folder or a local .skill or .zip archive, or SKILL.md file.

From GitHub URLFrom .skill, .zip, or SKILL.md

GitHub repo or folder

https://github.com/spring-ai-community/spring-testing-skills/tree/main/skills/spring-testing-fundamentals

Points to a single skill folder, or any folder that contains multiple skills. Public repos only.

CancelContinue

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/spring-ai-community/spring-testing-skills.git /tmp/spring-testing-skills
mkdir -p .claude/skills
cp -r /tmp/spring-testing-skills/skills/spring-testing-fundamentals .claude/skills/spring-testing-fundamentals

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Spring Testing Fundamentals in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Spring Testing Fundamentals on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Spring Testing Fundamentals is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Spring Testing Fundamentals

Signals: assertThat, assertThatThrownBy, given/willReturn, then(mock).should, ArgumentCaptor, @MockitoBean, @MockitoSpyBean, @DirtiesContext, context caching, testing pyramid

Tested With

Spring Boot 3.2+ / Spring Boot 4.x
Spring Framework 6.x / Spring Framework 7.x
AssertJ 3.24+
Mockito 5.x
JUnit 5

Do NOT Use This Skill When

You need domain-specific patterns:

Testing JPA repositories, Testcontainers, @DataJpaTest → use spring-jpa-testing
Testing REST controllers, MockMvc, @WebMvcTest → use spring-mvc-testing
Testing security, @WithMockUser, JWT, OAuth2 → use spring-security-testing
Testing reactive controllers, @WebFluxTest, StepVerifier → use spring-webflux-testing
Testing WebSocket/STOMP → use spring-websocket-testing

When to Read References

Situation	Read
AssertJ scalars, optionals, BigDecimal, collections, exceptions	`references/assertj-mockito-idioms.md`
BDDMockito `given/willReturn`, `then(mock).should`, argument matchers	`references/assertj-mockito-idioms.md`
`ArgumentCaptor` usage and verification patterns	`references/assertj-mockito-idioms.md`
`UnnecessaryStubbingException` and strict stubbing fixes	`references/assertj-mockito-idioms.md`
`@MockitoBean` vs `@MockitoSpyBean` in Boot 4	`references/assertj-mockito-idioms.md`
Testing pyramid: when to use each slice annotation	`references/cross-cutting-testing-patterns.md`
Context caching: why tests are slow, cache key, `@DirtiesContext` impact	`references/cross-cutting-testing-patterns.md`
Universal anti-patterns across all Spring test types	`references/cross-cutting-testing-patterns.md`
Boot 4 annotation migration checklist	`references/cross-cutting-testing-patterns.md`

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Spring Testing Fundamentals AI skill do?

Why use Spring Testing Fundamentals on TypingMind?

Because you install it once and use it with any model. Spring Testing Fundamentals is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Spring Testing Fundamentals in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/spring-ai-community/spring-testing-skills/tree/main/skills/spring-testing-fundamentals. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Spring Testing Fundamentals?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Spring Testing Fundamentals?

As many as you like. As long as a model supports skills, you can use Spring Testing Fundamentals with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Spring Testing Fundamentals AI skill free?

Yes. It is published on GitHub by spring-ai-community under the Apache-2.0 license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

View all

Context And Decisions

affaan-m

CommunityPopular

Govern stable domain context with a narrowly scoped CONTEXT.md when needed, and route hard-to-reverse decisions to ECC's existing architecture-decision-records skill. Use when domain terms require…

Docs Governance

Route broad documentation-governance requests to existing ECC skills and run an opt-in, read-only audit of mapped documentation roles, links, ADR indexes, and evidence references. Use when a user asks…

Ecc Conventions

Development conventions and patterns for ECC. JavaScript project with conventional commits.

Mcp Dependency Review

affaan-m

CommunityPopular

Statically review MCP configuration for mutable package references before approval or CI, without executing discovered MCP servers. Use when reviewing .mcp.json, Cursor, VS Code, Claude, Windsurf, or…

Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Spring Testing Fundamentals

Tested With

Do NOT Use This Skill When

When to Read References

Bundled files

Frequently asked questions

Related AI Skills

Set up your own AI workspace now