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521 Frameworks Micronaut Testing Unit Tests by gabrielmoreira

Name: 521 Frameworks Micronaut Testing Unit Tests
Rating: 4.2 (5 reviews)
Author: gabrielmoreira

521 Frameworks Micronaut Testing Unit Tests

Use when you need to write unit tests for Micronaut applications — Mockito-first with @ExtendWith(MockitoExtension.class), @MicronautTest with @MockBean, HttpClient @Client(/) assertions, @Property overrides, @ParameterizedTest, and *Test vs *IT naming. For framework-agnostic Java use @131-java-testing-unit-testing. This should trigger for requests such as Add or improve unit tests in a Micronaut project; Reduce unnecessary @MicronautTest usage with Mockito-first tests; Write Mockito-first unit tests for Micronaut services; Mock Micronaut bean collaborators in unit tests; Review fast Micronaut tests without application context. Part of Plinth Toolkit

gabrielmoreira Updated Sep 9, 2026 17 repo stars

File contents

Micronaut Unit Testing

Apply fast testing strategies for Micronaut: Mockito-first, narrow @MicronautTest when HTTP or DI replacement is required.

What is covered in this Skill?

Pure JUnit 5 + Mockito without container boot
@MicronautTest with @MockBean factory methods for collaborators
HttpClient blocking exchanges against the embedded server
@Property for deterministic configuration in tests
@ParameterizedTest with @CsvSource / @MethodSource
Naming: *Test → Surefire; *IT → Failsafe when configured
When to escalate to @522

Scope: Apply recommendations based on the reference rules and good/bad code examples.

Constraints

Compile before test refactors; verify the full suite after.

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 examples
EDGE CASE: If request scope is ambiguous, stop and ask a clarifying question before applying changes
EDGE CASE: If required inputs, files, or tooling are missing, report what is missing and ask whether to proceed with setup guidance

When to use this skill

Add or improve unit tests in a Micronaut project
Reduce unnecessary @MicronautTest usage with Mockito-first tests
Write Mockito-first unit tests for Micronaut services
Mock Micronaut bean collaborators in unit tests
Review fast Micronaut tests without application context

Workflow

Read reference and assess project context

Read references/521-frameworks-micronaut-testing-unit-tests.md and inspect the current project setup before proposing changes.

Gather scope and decide target improvements

Identify requested outcomes, constraints, and the minimum safe set of changes to apply.

Apply framework-aligned changes

Implement or refactor configuration/code following the reference patterns and project conventions.

Run verification and report results

Execute appropriate build/tests and summarize what changed, what was verified, and any follow-up actions.

Reference

For detailed guidance, examples, and constraints, see references/521-frameworks-micronaut-testing-unit-tests.md.

---name: 521-frameworks-micronaut-testing-unit-testsdescription: Use when you need to write unit tests for Micronaut applications — Mockito-first with @ExtendWith(MockitoExtension.class), @MicronautTest with @MockBean, HttpClient @Client(/) assertions, @Property overrides, @ParameterizedTest, and *Test vs *IT naming. For framework-agnostic Java use @131-java-testing-unit-testing. This should trigger for requests such as Add or improve unit tests in a Micronaut project; Reduce unnecessary @MicronautTest usage with Mockito-first tests; Write Mockito-first unit tests for Micronaut services; Mock Micronaut bean collaborators in unit tests; Review fast Micronaut tests without application context. Part of Plinth Toolkitlicense: Apache-2.0---# Micronaut Unit Testing Apply fast testing strategies for Micronaut: Mockito-first, narrow @MicronautTest when HTTP or DI replacement is required. **What is covered in this Skill?** - Pure JUnit 5 + Mockito without container boot - @MicronautTest with @MockBean factory methods for collaborators - HttpClient blocking exchanges against the embedded server - @Property for deterministic configuration in tests - @ParameterizedTest with @CsvSource / @MethodSource - Naming: *Test → Surefire; *IT → Failsafe when configured - When to escalate to `@522` **Scope:** Apply recommendations based on the reference rules and good/bad code examples. ## Constraints Compile before test refactors; verify the full suite after. - **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 examples - **EDGE CASE**: If request scope is ambiguous, stop and ask a clarifying question before applying changes - **EDGE CASE**: If required inputs, files, or tooling are missing, report what is missing and ask whether to proceed with setup guidance ## When to use this skill - Add or improve unit tests in a Micronaut project - Reduce unnecessary @MicronautTest usage with Mockito-first tests - Write Mockito-first unit tests for Micronaut services - Mock Micronaut bean collaborators in unit tests - Review fast Micronaut tests without application context ## Workflow 1. **Read reference and assess project context** Read `references/521-frameworks-micronaut-testing-unit-tests.md` and inspect the current project setup before proposing changes. 2. **Gather scope and decide target improvements** Identify requested outcomes, constraints, and the minimum safe set of changes to apply. 3. **Apply framework-aligned changes** Implement or refactor configuration/code following the reference patterns and project conventions. 4. **Run verification and report results** Execute appropriate build/tests and summarize what changed, what was verified, and any follow-up actions. ## Reference For detailed guidance, examples, and constraints, see [references/521-frameworks-micronaut-testing-unit-tests.md](references/521-frameworks-micronaut-testing-unit-tests.md).

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