Developer tool

JUnit agent skills for Claude Code, Codex and other agents.

De facto standard unit-testing framework for Java and the JVM.
skills
84
official
14
Type
Developer tool
Website
junit.org
Official GitHub
junit-team

JUnit skills, ranked

Ranked by score. Sort bymost stars,trending,newest,recently updated

Official (14 skills)

Official JUnit skills
#SkillRepositoryStarsUsed inTokensAuto-checkLicenceUpdated
1

Fetch and analyze Prow e2e pipeline failures for cloud-provider-azure.

kubernetes-sigs/cloud-provider-azure294—~3.4kAutomated safety check: PassApache-2.0today
2

Converts Spock/Groovy test files in a Gradle module to equivalent JUnit 5 Java tests.

DataDog/dd-trace-java736—~1.3kAutomated safety check: PassApache-2.0today
3

Convert JUnit 5 @MethodSource/@CsvSource/@ValueSource parameterized tests to @TableTest (JDK8)

DataDog/dd-trace-java736—~950Automated safety check: PassApache-2.0today
4

Provides file paths to language-specific reference files for the test ANALYSIS skills (assertion-quality, test-anti-patterns, test-gap-analysis, test-smell-detection, test-tagging).

microsoft/testfx1k2 repos~1.1kAutomated safety check: PassMITtoday
5

Expert Spring Boot 4 testing specialist that selects the best Spring Boot testing techniques for your situation with Junit 6 and AssertJ.

github/awesome-copilot40k1 repo~1.7kAutomated safety check: PassMITtoday
6

A skill your agent uses when converting Java source files to idiomatic Kotlin, when user mentions "java to kotlin", "j2k", "convert java", "migrate java to kotlin", or when working with .java files…

JetBrains/skills3633 repos~1.4kAutomated safety check: PassApache-2.03 mo ago
7

Analyzes the variety and depth of assertions across test suites in any language.

microsoft/testfx1k—~4.1kAutomated safety check: PassMITtoday
8

Generates and writes new unit tests for any programming language — scaffolds .NET test projects, pytest suites, Vitest/Jest suites, Go test files, and JUnit suites, and configures coverage tooling…

microsoft/testfx1k—~2.7kAutomated safety check: PassMITtoday
9

Performs pseudo-mutation analysis on production code in any language to find gaps in existing test suites.

microsoft/testfx1k—~4kAutomated safety check: PassMITtoday
10

Deep-dive audit using the full testsmells.org 19-smell academic catalog for tests in any language.

microsoft/testfx1k—~5.3kAutomated safety check: PassMITtoday
11
11.Test TaggingOfficial

Analyzes test suites in any language and tags each test with a standardized set of traits (positive, negative, critical-path, boundary, smoke, regression, integration, performance, security).

microsoft/testfx1k—~4.3kAutomated safety check: PassMITtoday
12
12.Java JunitOfficial

Get best practices for JUnit 5 unit testing, including data-driven tests

github/awesome-copilot40k1 repo~746Automated safety check: PassMITtoday
13

Audits existing test code in any language for anti-patterns and quality issues — produces a severity-ranked report (Critical / Warning / Info) with concrete code-level fixes.

microsoft/testfx1k—~4.9kAutomated safety check: PassMITtoday
14
14.File Test BugOfficial

File a GitHub issue for local integration test failures. An agent skill from microsoft/GitHub-Copilot-for-Azure.

microsoft/GitHub-Copilot-for-Azure255—~628Automated safety check: PassMITtoday

Community

Community JUnit skills
#SkillRepositoryStarsUsed inTokensAuto-checkLicenceUpdated
15

Deep-dive diagnosis of a Playwright test failure already isolated to one Quay Prow/OpenShift CI run: downloads its GCS artifacts (results.json, JUnit, build/pod logs, Jaeger traces), classifies real…

quay/quay2.8k—~2.2kAutomated safety check: PassApache-2.0today
16

Spring Boot 3.x development - REST APIs, JPA, Security, Testing, and Cloud-native patterns.

piomin/claude-ai-spring-boot1.3k—~2kAutomated safety check: PassApache-2.05 mo ago
17

Diagnose any Quay Prow job failure end to end: prowjob.json - top-level build log - JUnit - resolved failing step - Playwright results.json when the failing step is Playwright, continuing through…

quay/quay2.8k—~2.9kAutomated safety check: PassApache-2.0today
18

Comprehensive code review for Java - clean code principles, API contracts, null safety, exception handling, and performance.

piomin/claude-ai-spring-boot1.3k—~2.2kAutomated safety check: PassApache-2.05 mo ago
19

Guide for writing modern Java 21 in a Grails and Groovy codebase: records, sealed classes, pattern matching, text blocks and how Java works alongside Groovy.

apache/grails-core2.9k—~1.9kAutomated safety check: PassApache-2.0today
20

Use Shopware CLI for Shopware project, extension, and account workflows — create and install new projects (project create, project dev install), validate projects or extensions (with…

shopware/shopware-cli123—~4.9kAutomated safety check: PassMITyesterday
21

Testing patterns for Vert.x Redis Client: test frameworks, async testing, test locations, container setup, and how to run tests.

vert-x3/vertx-redis-client142—~1.6kAutomated safety check: PassApache-2.019 days ago
22

Author and maintain versioned Selenium WebDriver tests with Java and JUnit 5.

fugazi/test-automation-skills-agents247—~2.8kAutomated safety check: PassMIT3 days ago
23

Bootstrap pitest via the info.solidsoft.pitest Gradle plugin with Kotlin-sane defaults, run mutation tests scoped to changed classes, interpret surviving mutants from mutations.xml, triage…

jvm-skills/jvm-skills140—~6.7kAutomated safety check: PassApache-2.01 mo ago
24

Test-driven development for Spring Boot using JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo.

affaan-m/ECC274k5 repos~947Automated safety check: PassMIT2 days ago
25

Debug Maven Surefire unit tests by running them in JDWP "wait for debugger" mode (-Dmaven.surefire.debug) and attaching to the forked test JVM using jdb (preferred for CLI/agent debugging)…

eclipse-rdf4j/rdf4j420—~2.4kAutomated safety check: PassBSD-3-Clausetoday
26

Standards for writing tests in fdb-record-layer. An agent skill from FoundationDB/fdb-record-layer.

FoundationDB/fdb-record-layer675—~792Automated safety check: PassApache-2.0today
27

Parse a Prow CI job URL or Jira ticket to extract E2E test failure details including test name, spec file, release branch, platform, and error messages

redhat-developer/rhdh172—~2.5kAutomated safety check: PassApache-2.0today
28

Design and implement automated tests for current Minecraft 26.x or legacy 1.21.x mods and plugins using JUnit, MockBukkit, NeoForge Game Tests, or Fabric Game Tests.

Jahrome907/minecraft-agent-skills166—~3.8kAutomated safety check: PassMIT24 days ago
29

Run JUnit tests in Eclipse projects — all tests, by package, by class, or individual test methods.

gradusnikov/eclipse-chatgpt-plugin171—~1kAutomated safety check: PassMIT9 days ago
30

Builds Spring Boot 3.x services on Java 21 with domain-driven design, WebFlux, JPA tuning and Spring Security using OAuth2 and JWT, verified by Maven or Gradle builds.

Jeffallan/claude-skills12k—~1.5kAutomated safety check: PassMIT3 days ago
31

使用JUnit 5、Mockito、MockMvc、Testcontainers和JaCoCo进行Spring Boot的测试驱动开发。适用于添加功能、修复错误或重构时。

affaan-m/ECC274k3 repos~813Automated safety check: PassMIT2 days ago
32

Write a new Kotlin test, or modernize an existing one, using Kotest matchers and idiomatic Kotlin test style — backticked names, apply/assertSoftly blocks, and existing object mothers and helpers.

jvm-skills/jvm-skills140—~2.6kAutomated safety check: PassApache-2.01 mo ago
33

Finds flaky tests in CI logs by aggregating pass rates, explains likely causes and recommends whether to quarantine or fix each one.

Donchitos/Claude-Code-Game-Studios26k—~2.6kAutomated safety check: NotesMIT8 days ago
34

A skill your agent uses when the user has concrete failing cases in code or a guardrail/classifier/filter/prompt/API they own — a red-team failure catalogue OR a CI/CD test-failure report (failing…

gaasher/Agent-Loop-Skills174—~3.6kAutomated safety check: PassMIT3 mo ago
35

Java单元测试编写指南(基于JUnit和Mockito)

Leavesfly/Jimi237—~667Automated safety check: PassNo licence1 mo ago
36

Test-driven development for Quarkus 3.x LTS using JUnit 5, Mockito, REST Assured, Camel testing, and JaCoCo.

affaan-m/ECC274k1 repo~6.4kAutomated safety check: PassMIT2 days ago
37

Scaffold, write, debug, and enhance enterprise-grade Playwright E2E tests in Java using Page Object Model, JUnit 5, Allure reporting, and parallel execution.

davila7/claude-code-templates32k3 repos~3.4kAutomated safety check: PassMITtoday
38

Executes Pure code through the running Legend Pure LSP bridge as a fast REPL-style dev loop — compiles everything currently loaded and runs a function literally named go():Any[], instead of writing…

finos/legend-engine112—~1.8kAutomated safety check: PassApache-2.0today
39

A skill your agent uses to stand up a JUnit4-based JVM unit-test suite on an Android module.

skydoves/android-testing-skills333—~5.1kAutomated safety check: PassApache-2.04 mo ago
40

Generates production-grade JUnit 5 unit and integration tests in Java.

sickn33/agentic-awesome-skills47k1 repo~1.8kAutomated safety check: PassMITtoday
41

Test-driven development skill for writing unit tests, generating test fixtures and mocks, analyzing coverage gaps, and guiding red-green-refactor workflows across Jest, Pytest, JUnit, Vitest, and…

alirezarezvani/claude-skills28k—~3.4kAutomated safety check: PassMIT1 mo ago
42

Installs and runs the kube-bench tool against a Kubernetes cluster as a Job, DaemonSet, or standalone binary, selecting the correct benchmark version and targets (control plane, etcd, kubelet…

mukul975/Anthropic-Cybersecurity-Skills34k—~2.3kAutomated safety check: NotesApache-2.01 mo ago
43

Write high-quality JUnit 5 tests with AssertJ assertions. An agent skill from decebals/claude-code-java.

decebals/claude-code-java750—~3.8kAutomated safety check: PassMIT1 mo ago
44

Generate Newman CLI commands, configuration files, Jenkins pipeline scripts, and shell automation for running Postman collections in CI/CD or local environments.

sickn33/agentic-awesome-skills47k1 repo~2.1kAutomated safety check: PassMITtoday
45

Desarrollo guiado por pruebas para Quarkus 3.x LTS usando JUnit 5, Mockito, REST Assured, pruebas Camel y JaCoCo.

affaan-m/ECC274k—~3.6kAutomated safety check: PassMIT2 days ago
46

Desarrollo guiado por pruebas para Spring Boot usando JUnit 5, Mockito, MockMvc, Testcontainers y JaCoCo.

affaan-m/ECC274k—~996Automated safety check: PassMIT2 days ago
47

JUnit 5、Mockito、REST Assured、Camelテスト、JaCoCoを使用したQuarkus 3.xのテスト駆動開発。機能追加、バグ修正、またはイベント駆動サービスのリファクタリング時に使用。

affaan-m/ECC274k—~5.8kAutomated safety check: PassMIT2 days ago
48

A skill your agent uses to launch, drive, and tear down an Activity from an instrumentation test using ActivityScenario and the JUnit4 wrapper ActivityScenarioRule.

skydoves/android-testing-skills333—~4.1kAutomated safety check: PassApache-2.04 mo ago

Questions, answered from the data.

What is the best JUnit skill?

Debug E2E Pipeline (official) from kubernetes-sigs/cloud-provider-azure ranks first of the 84 JUnit skills listed here, with the highest score: its repository has 294 GitHub stars, its SKILL.md loads about 3.4k tokens and it passes the automated safety check with no findings. Next come Migrate Groovy To Java and Migrate Junit Source To Tabletest.

Is there an official JUnit skill?

14 of the 84 JUnit skills are official, published by the vendor's own GitHub organization: Debug E2E Pipeline, Migrate Groovy To Java, Migrate Junit Source To Tabletest, Test Analysis Extensions, Spring Boot Testing and 9 more.

How are these skills ranked?

By Skill Navigator score, which combines the GitHub stars of the skill's repository (shared across that repo's skills and discounted for large collections), how many other GitHub owners carry a copy of the skill, and automated SKILL.md quality checks, minus penalties for safety-check warnings and for each further skill from the same repository. Skills that fail the safety check are not listed.