Agent skill

Springboot TDD

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

MITAuto-check passedTesting & QA

Install Springboot TDD

skills CLI

$ npx skills add affaan-m/ECC --skill springboot-tdd -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC springboot-tdd --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/springboot-tdd .claude/skills/springboot-tdd && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "springboot-tdd" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/springboot-tdd into .claude/skills/springboot-tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "springboot-tdd", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/affaan-m/ECC/tree/main/skills/springboot-tdd

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add affaan-m/ECC --skill springboot-tdd -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC springboot-tdd --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/springboot-tdd .agents/skills/springboot-tdd && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "springboot-tdd" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/springboot-tdd into .agents/skills/springboot-tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "springboot-tdd", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill springboot-tdd -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC springboot-tdd --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/springboot-tdd .cursor/skills/springboot-tdd && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "springboot-tdd" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/springboot-tdd into .cursor/skills/springboot-tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "springboot-tdd", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/affaan-m/ECC.git --path skills/springboot-tdd

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add affaan-m/ECC --skill springboot-tdd -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC springboot-tdd --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/springboot-tdd .gemini/skills/springboot-tdd && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "springboot-tdd" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/springboot-tdd into .gemini/skills/springboot-tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "springboot-tdd", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install affaan-m/ECC springboot-tdd

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add affaan-m/ECC --skill springboot-tdd -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/springboot-tdd .github/skills/springboot-tdd && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "springboot-tdd" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/springboot-tdd into .github/skills/springboot-tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "springboot-tdd", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill springboot-tdd -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC springboot-tdd --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/springboot-tdd .opencode/skills/springboot-tdd && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "springboot-tdd" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/springboot-tdd into .opencode/skills/springboot-tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "springboot-tdd", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: springboot-tdd
GitHub stars: 276k
Used in: 5 other repos
Token cost: ~947 tokens
SKILL.md length: 149 words
Files: 1
Skills in repo: 683
Repo updated: Oct 10, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

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

Works in 4 steps: Write tests first (they should fail) → Implement minimal code to pass → Refactor with tests green → …
Adding features
SKILL.md covers When to Use, Workflow, Unit Tests (JUnit 5 + Mockito) and Web Layer Tests (MockMvc), plus 7 more sections
Calls mvn

What it does

Springboot TDD is an agent skill from affaan-m/ECC. Test-driven development for Spring Boot using JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo. Use when adding features, fixing bugs, or refactoring.

Its SKILL.md is about 950 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Testing & QA, covering Test-driven development, Integration testing and Backend development. It works with Spring Boot and JUnit. The repository describes itself as: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. The licence is MIT.

When your agent uses it

Adding features
Tasks that involve Test-driven development
Tasks that involve Integration testing

Example prompts

“/springboot-tdd”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

Write tests first (they should fail)
Implement minimal code to pass
Refactor with tests green
Enforce coverage (JaCoCo)

What it can do on your machine

Read from SKILL.md and the folder at commit 4eb71d9. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- mvn
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Springboot TDD loads about 947 tokens when it runs. Until then it costs about 43 tokens; SKILL.md has 149 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~43
When it runs · the whole SKILL.md, loaded when a task matches: ~947

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from affaan-m/ECC at commit 4eb71d9, republished under its MIT licence (© affaan-m). 149 words, ~947 tokens.

Download SKILL.mdSave it as .claude/skills/springboot-tdd/SKILL.md (or your agent's skills folder).

name: springboot-tdd
description: Test-driven development for Spring Boot using JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo. Use when adding features, fixing bugs, or refactoring.
metadata.origin: ECC

Spring Boot TDD Workflow

TDD guidance for Spring Boot services with 80%+ coverage (unit + integration).

When to Use

New features or endpoints
Bug fixes or refactors
Adding data access logic or security rules

Workflow

Write tests first (they should fail)
Implement minimal code to pass
Refactor with tests green
Enforce coverage (JaCoCo)

Unit Tests (JUnit 5 + Mockito)

java

@ExtendWith(MockitoExtension.class)
class MarketServiceTest {
  @Mock MarketRepository repo;
  @InjectMocks MarketService service;

  @Test
  void createsMarket() {
    CreateMarketRequest req = new CreateMarketRequest("name", "desc", Instant.now(), List.of("cat"));
    when(repo.save(any())).thenAnswer(inv -> inv.getArgument(0));

    Market result = service.create(req);

    assertThat(result.name()).isEqualTo("name");
    verify(repo).save(any());
  }
}

Patterns:

Arrange-Act-Assert
Avoid partial mocks; prefer explicit stubbing
Use @ParameterizedTest for variants

Web Layer Tests (MockMvc)

java

@WebMvcTest(MarketController.class)
class MarketControllerTest {
  @Autowired MockMvc mockMvc;
  @MockBean MarketService marketService;

  @Test
  void returnsMarkets() throws Exception {
    when(marketService.list(any())).thenReturn(Page.empty());

    mockMvc.perform(get("/api/markets"))
        .andExpect(status().isOk())
        .andExpect(jsonPath("$.content").isArray());
  }
}

Integration Tests (SpringBootTest)

java

@SpringBootTest
@AutoConfigureMockMvc
@ActiveProfiles("test")
class MarketIntegrationTest {
  @Autowired MockMvc mockMvc;

  @Test
  void createsMarket() throws Exception {
    mockMvc.perform(post("/api/markets")
        .contentType(MediaType.APPLICATION_JSON)
        .content("""
          {"name":"Test","description":"Desc","endDate":"2030-01-01T00:00:00Z","categories":["general"]}
        """))
      .andExpect(status().isCreated());
  }
}

Persistence Tests (DataJpaTest)

java

@DataJpaTest
@AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.NONE)
@Import(TestContainersConfig.class)
class MarketRepositoryTest {
  @Autowired MarketRepository repo;

  @Test
  void savesAndFinds() {
    MarketEntity entity = new MarketEntity();
    entity.setName("Test");
    repo.save(entity);

    Optional<MarketEntity> found = repo.findByName("Test");
    assertThat(found).isPresent();
  }
}

Testcontainers

Use reusable containers for Postgres/Redis to mirror production
Wire via @DynamicPropertySource to inject JDBC URLs into Spring context

Coverage (JaCoCo)

Maven snippet:

xml

<plugin>
  <groupId>org.jacoco</groupId>
  <artifactId>jacoco-maven-plugin</artifactId>
  <version>0.8.14</version>
  <executions>
    <execution>
      <goals><goal>prepare-agent</goal></goals>
    </execution>
    <execution>
      <id>report</id>
      <phase>verify</phase>
      <goals><goal>report</goal></goals>
    </execution>
  </executions>
</plugin>

Assertions

Prefer AssertJ (assertThat) for readability
For JSON responses, use jsonPath
For exceptions: assertThatThrownBy(...)

Test Data Builders

java

class MarketBuilder {
  private String name = "Test";
  MarketBuilder withName(String name) { this.name = name; return this; }
  Market build() { return new Market(null, name, MarketStatus.ACTIVE); }
}

CI Commands

Maven: mvn -T 4 test or mvn verify
Gradle: ./gradlew test jacocoTestReport

Remember: Keep tests fast, isolated, and deterministic. Test behavior, not implementation details.

Files

Just SKILL.md in skills/springboot-tdd of affaan-m/ECC.

Open the folder on GitHubat commit 4eb71d9

Used in 5 other repositories

We found 14 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 5 other GitHub owners. This page covers the copy in affaan-m/ECC, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Springboot TDD next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Springboot TDD compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Springboot TDD this skillaffaan-m/ECC	276k	5 repos	~947	Automated safety check: Pass	MIT	today
Springboot TDDxu-xiang/everything-claude-code-zh	2k	—	~883	Automated safety check: Pass	MIT	7 mo ago
Springboot TDDxu-xiang/everything-claude-code-zh	2k	—	~840	Automated safety check: Pass	MIT	7 mo ago
Django Outside In TDDhashgraph-online/awesome-codex-plugins	1.3k	—	~905	Automated safety check: Pass	MIT	today
Java TestingHoangNguyen0403/agent-skills-standard	572	—	~1k	Automated safety check: Pass	MIT	today
Spring Boot Test Patternsgiuseppe-trisciuoglio/developer-kit	357	—	~2.3k	Automated safety check: Notes	MIT	1 mo ago

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Questions about Springboot TDD

What does Springboot TDD do?

Test-driven development for Spring Boot using JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo. Springboot TDD is an agent skill from affaan-m/ECC. Test-driven development for Spring Boot using JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo.

When should I use Springboot TDD?

Springboot TDD fits situations like: adding features; tasks that involve Test-driven development; tasks that involve Integration testing.

How do I install Springboot TDD in Claude Code?

Run `npx skills add affaan-m/ECC --skill springboot-tdd -a claude-code`. Or copy the skill folder (skills/springboot-tdd in affaan-m/ECC) into .claude/skills/springboot-tdd in your project. Claude Code loads it when a task matches its description.

How do I install Springboot TDD in Codex?

Run `npx skills add affaan-m/ECC --skill springboot-tdd -a codex`. Or copy the skill folder (skills/springboot-tdd in affaan-m/ECC) into .agents/skills/springboot-tdd in your project. Codex loads it when a task matches its description.

Can I use Springboot TDD in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add affaan-m/ECC --skill springboot-tdd -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/springboot-tdd, .gemini/skills/springboot-tdd, .github/skills/springboot-tdd and .opencode/skills/springboot-tdd in your project.

What does Springboot TDD need to run?

Going by SKILL.md and its folder, Springboot TDD needs the command-line tools its instructions call (mvn).

Does Springboot TDD access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Springboot TDD safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Springboot TDD use?

Springboot TDD is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Springboot TDD use?

About 947 tokens (SKILL.md is roughly 3.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Springboot TDD?

Skills that share tags, products or a category with Springboot TDD: Springboot TDD (xu-xiang/everything-claude-code-zh, 2k stars), Springboot TDD (xu-xiang/everything-claude-code-zh, 2k stars), Django Outside In TDD (hashgraph-online/awesome-codex-plugins, 1.3k stars) and Java Testing (HoangNguyen0403/agent-skills-standard, 572 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Springboot TDD?

affaan-m (a GitHub user) maintains it in affaan-m/ECC, which has 276,111 GitHub stars. The repository holds 683 skills in this directory. The repository was last updated on October 10, 2026.

Source: affaan-m/ECC on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Springboot TDD

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Spring Boot TDD Workflow

When to Use

Workflow

Unit Tests (JUnit 5 + Mockito)

Web Layer Tests (MockMvc)

Integration Tests (SpringBootTest)

Persistence Tests (DataJpaTest)

Testcontainers

Coverage (JaCoCo)

Assertions

Test Data Builders

CI Commands

Files

Used in 5 other repositories

Compare with similar skills

Similar skills

More from affaan-m/ECC

Related

Questions about Springboot TDD