Unit Test Wiremock REST API

What it does

When your agent uses it

• Testing service integrations with external APIs
• Mocking HTTP endpoints

Example prompts

• “Use the unit-test-wiremock-rest-api skill to provide patterns for unit testing external REST APIs using WireMock”
• “/unit-test-wiremock-rest-api”

Requirements

• Pre-approved tools (allowed-tools): Read, Write, Bash, Glob, Grep

Workflow steps

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

1. 1Add dependency: WireMock in test scope (Maven/Gradle)
2. 2Register extension: @RegisterExtension WireMockExtension with dynamicPort()
3. 3Configure client: Use wireMock.getRuntimeInfo().getHttpBaseUrl() as base URL
4. 4Stub responses: stubFor() with request matching (URL, headers, body)
5. 5Execute and assert: Call service methods, validate results with AssertJ
6. 6Verify requests: verify() to ensure correct API usage

What it can do on your machine

Read from SKILL.md and the folder at commit fe73fb3. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Write
  • Bash
  • Glob
  • Grep

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are xml and java).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • wiremock.org

  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

Unit Test Wiremock REST API loads about 1.1k tokens when it runs, and up to ~1.9k if it reads all its reference files. Until then it costs about 85 tokens; SKILL.md has 277 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~85

When it runs · the whole SKILL.md, loaded when a task matches

~1.1k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~1.9k

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

• NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

  allowed-tools: Read, Write, Bash, Glob, Grep

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 giuseppe-trisciuoglio/developer-kit at commit fe73fb3, republished under its MIT licence (© giuseppe-trisciuoglio). 277 words, ~1,104 tokens.

name

unit-test-wiremock-rest-api

description

Provides patterns for unit testing external REST APIs using WireMock. Stubs API responses, verifies request details, simulates failures (timeouts, 4xx/5xx errors), and validates HTTP client behavior without real network calls. Use when testing service integrations with external APIs or mocking HTTP endpoints.

allowed-tools

Read, Write, Bash, Glob, Grep

<dependency>
  <groupId>org.wiremock</groupId>
  <artifactId>wiremock</artifactId>
  <version>3.4.1</version>
  <scope>test</scope>
</dependency>
<dependency>
  <groupId>org.assertj</groupId>
  <artifactId>assertj-core</artifactId>
  <scope>test</scope>
</dependency>

import com.github.tomakehurst.wiremock.junit5.WireMockExtension;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.RegisterExtension;
import static com.github.tomakehurst.wiremock.client.WireMock.*;
import static org.assertj.core.api.Assertions.assertThat;

class ExternalWeatherServiceTest {

  @RegisterExtension
  static WireMockExtension wireMock = WireMockExtension.newInstance()
    .options(wireMockConfig().dynamicPort())
    .build();

  @Test
  void shouldFetchWeatherDataFromExternalApi() {
    wireMock.stubFor(get(urlEqualTo("/weather?city=London"))
      .withHeader("Accept", containing("application/json"))
      .willReturn(aResponse()
        .withStatus(200)
        .withHeader("Content-Type", "application/json")
        .withBody("{\"city\":\"London\",\"temperature\":15,\"condition\":\"Cloudy\"}")));

    String baseUrl = wireMock.getRuntimeInfo().getHttpBaseUrl();
    WeatherApiClient client = new WeatherApiClient(baseUrl);
    WeatherData weather = client.getWeather("London");

    assertThat(weather.getCity()).isEqualTo("London");
    assertThat(weather.getTemperature()).isEqualTo(15);

    wireMock.verify(getRequestedFor(urlEqualTo("/weather?city=London"))
      .withHeader("Accept", containing("application/json")));
  }
}

© giuseppe-trisciuoglio, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in plugins/developer-kit-java/skills/unit-test-wiremock-rest-api of giuseppe-trisciuoglio/developer-kit.

• SKILL.md
• references/advanced-examples.md

Open the folder on GitHubat commit fe73fb3