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132 java testing integration testing

Skill jabrena/plinth/skills/132-java-testing-integration-testing

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npx -y skills add jabrena/plinth --skill 132-java-testing-integration-testing

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What its author says it does

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Use when you need to set up, review, or improve Java integration tests — including generating a BaseIntegrationTest.java with WireMock for HTTP stubs, detecting HTTP client infrastructure from import signals, injecting service coordinates dynamically via System.setProperty(), creating WireMock JSON mapping files with bodyFileName, isolating stubs per test method, verifying HTTP interactions, or eliminating anti-patterns such as Mockito-mocked HTTP clients or globally registered WireMock stubs. This should trigger for requests such as Review Java code for integration tests; Apply best practices for integration tests in Java code; Write Java integration tests with real infrastructure boundaries; Improve Testcontainers integration tests for Java code; Review integration test setup and teardown in Java projects. Part of Plinth Toolkit

The file declares its own license as Apache-2.0. That is the author’s claim about this one file, and it is not the same thing as the license GitHub reports for the repository, which is listed with the other numbers below.

SKILL.md

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Java Integration testing guidelines

Set up robust integration-test infrastructure for Java services using WireMock to stub outbound HTTP dependencies.

What is covered in this Skill?

  • Infrastructure topology detection: scanning imports for HttpClient, feign.*, retrofit2.*, RestTemplate
  • Abstract BaseIntegrationTest base class
  • WireMockExtension with @RegisterExtension, dynamic port allocation (dynamicPort())
  • usingFilesUnderClasspath(wiremock), @BeforeAll + System.setProperty() for coordinate propagation
  • WireMock JSON mapping files (bodyFileName referencing wiremock/files/)
  • Programmatic stub registration via WireMock DSL
  • Per-test stub isolation: register stubs inside each test method
  • Fault injection: 503 service unavailable, network latency with withFixedDelay
  • Request verification via WIREMOCK.verify
  • wiremock-standalone Maven dependency (test scope)
  • Anti-patterns: global @BeforeAll stubs, Mockito-mocked HTTP clients, hardcoded ports or URLs

Scope: The reference is organized by examples (good/bad code patterns) for each core area. Apply recommendations based on applicable examples.

Constraints

Before applying any integration test changes, ensure the project compiles. If compilation fails, stop immediately — do not proceed until resolved. After applying improvements, run full verification.

  • MANDATORY: Run ./mvnw compile or mvn compile before applying any change
  • SAFETY: If compilation fails, stop immediately and do not proceed — compilation failure is a blocking condition
  • VERIFY: Run ./mvnw clean verify or mvn clean verify after applying improvements
  • BEFORE APPLYING: Read the reference for detailed examples, good/bad patterns, and constraints

When to use this skill

  • Review Java code for integration tests
  • Apply best practices for integration tests in Java code
  • Write Java integration tests with real infrastructure boundaries
  • Improve Testcontainers integration tests for Java code
  • Review integration test setup and teardown in Java projects

Workflow

  1. Compile project before integration-test changes

Run ./mvnw compile or mvn compile and stop immediately if compilation fails.

  1. Read integration-testing reference and detect topology

Read references/132-java-testing-integration-testing.md and detect HTTP client and external dependency integration points.

  1. Set up resilient integration-test infrastructure

Implement BaseIntegrationTest, WireMock mappings/stubs, per-test isolation, and verification patterns.

  1. Verify with full build

Run ./mvnw clean verify or mvn clean verify after applying improvements.

Reference

For detailed guidance, examples, and constraints, see references/132-java-testing-integration-testing.md.

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