321-frameworks-spring-boot-testing-unit-tests

321-frameworks-spring-boot-testing-unit-tests is a skill for Claude Code, Codex from jabrena/cursor-rules-examples. It costs 84 tokens per session (432 once invoked), scanned A, original, Apache-2.0.

A testing guide for Spring Boot applications, a Java framework for building web and backend services. It covers unit tests with Mockito, focused controller and JSON tests, and setup rules for test configuration.

In plain words
What is it for?
Use it to write or review Spring Boot unit tests with `@Mock` and `@InjectMocks`, controller tests with `@WebMvcTest`, and JSON tests with `@JsonTest`; use a separate integration-testing guide for integration tests.
Why use it?
It helps test services, components, controllers, and JSON handling without always starting the entire application. It also requires compilation before changes and full verification afterward.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/jabrena/cursor-rules-examples/321-frameworks-spring-boot-testing-unit-tests
Any agent
npx skills add jabrena/cursor-rules-examples --skill 321-frameworks-spring-boot-testing-unit-tests
Clone the repo
git clone --depth 1 https://github.com/jabrena/cursor-rules-examples

Made for: Claude Code, Codex.

Wrote this? Show the measurements

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agentmods badge for 321-frameworks-spring-boot-testing-unit-tests

README.md
[![agentmods](https://agentmods.dev/badge/skills/jabrena/cursor-rules-examples/321-frameworks-spring-boot-testing-unit-tests.svg)](https://agentmods.dev/skills/jabrena/cursor-rules-examples/321-frameworks-spring-boot-testing-unit-tests)
Your own site
<a href="https://agentmods.dev/skills/jabrena/cursor-rules-examples/321-frameworks-spring-boot-testing-unit-tests"><img src="https://agentmods.dev/badge/skills/jabrena/cursor-rules-examples/321-frameworks-spring-boot-testing-unit-tests.svg" alt="Measured on agentmods" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 432 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00084 $0.00432
Opus 5 $0.00042 $0.00216
Sonnet 5 $0.00017 $0.00086
Haiku 4.5 $0.00008 $0.00043

Measured 4d ago against content hash 2dcfa4bb28ec, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

321-frameworks-spring-boot-testing-unit-tests scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/321-frameworks-spring-boot-testing-unit-tests/SKILL.md · 39 lines

What it actually says

Spring Boot Unit Testing with Mockito

Apply Spring Boot unit testing guidelines with Mockito.

What is covered in this Skill?

  • Pure unit tests: @ExtendWith(MockitoExtension.class), @Mock, @InjectMocks for @Service/@Component (no Spring context)
  • Slice tests: @WebMvcTest, @MockBean for controllers
  • @JsonTest for JSON serialization
  • @TestConfiguration, @ActiveProfiles for test setup

Scope: Apply recommendations based on the reference rules and good/bad code examples. For integration tests use @322-frameworks-spring-boot-testing-integration-tests.

Constraints

Before applying any test changes, ensure the project compiles. If compilation fails, stop immediately. After applying improvements, run full verification.

  • MANDATORY: Run ./mvnw compile or mvn compile before applying any change
  • SAFETY: If compilation fails, stop immediately
  • VERIFY: Run ./mvnw clean verify or mvn clean verify after applying improvements
  • BEFORE APPLYING: Read the reference for detailed rules and good/bad patterns

When to use this skill

  • Review Java code for Spring Boot unit tests
  • Apply best practices for Spring Boot unit tests in Java code

Reference

For detailed guidance, examples, and constraints, see references/321-frameworks-spring-boot-testing-unit-tests.md.

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 39 lines · 84 tokens per session scan A 2dcfa4bb28ec

Subscribe to this mod's changes

321-frameworks-spring-boot-testing-unit-tests is a skill published in the GitHub repository jabrena/cursor-rules-examples (2 stars, last pushed 8d ago), licensed Apache-2.0. It adds 84 tokens to every session and 432 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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