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MassimilianoPili
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unit-test-json-serialization

Validate JSON serialization and deserialization of Java objects with Spring Boot's @JsonTest.

Updated Mar 2, 2026
Search Tags:#testing#json#junit#spring boot#serialization#deserialization#jackson
One-click install
npx skills add https://github.com/MassimilianoPili/claude-code-config --skill unit-test-json-serialization-massimilianopili
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: unit-test-json-serialization
Source: https://github.com/MassimilianoPili/claude-code-config/tree/main/skills/unit-test-json-serialization
Command: npx skills add https://github.com/MassimilianoPili/claude-code-config --skill unit-test-json-serialization-massimilianopili

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill streamlines the process of validating JSON serialization and deserialization in Java applications, ensuring accurate data mapping and configuration.

Core Features & Use Cases

  • JSON Mapping Validation: Test how your Java objects are converted to and from JSON.
  • Custom Serializer Testing: Verify custom logic for handling JSON data transformations.
  • Use Case: You've implemented custom date formatting for a UserDto. Use this Skill to write a test that confirms the date is serialized to the correct string format and deserialized back accurately.

Quick Start

Use the unit-test-json-serialization skill to write a JUnit test for serializing a UserDto object to JSON.

Frequently Asked Questions about unit-test-json-serialization

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I test JSON serialization and deserialization in Spring Boot?▼

Test JSON serialization and deserialization in Spring Boot by using the @JsonTest annotation alongside the Jackson library. This validates POJO mapping, custom serializers, date formatting, and polymorphic deserialization.

What is the best way to validate custom Jackson serializers in Java?▼

Validating custom Jackson serializers is best done using Spring Boot's @JsonTest annotation. It isolates JSON mapping to test custom data transformations and date formats without starting the full application context.

Can I use @JsonTest with JUnit 5 to test polymorphic deserialization?▼

Yes, you can use @JsonTest with JUnit 5 to test polymorphic deserialization. This combination requires the Jackson databind library to accurately validate complex JSON mapping scenarios for Java objects.

How do I verify date format handling during JSON mapping with Jackson?▼

Verify date format handling during JSON mapping by writing a JUnit test with @JsonTest. This confirms date fields are serialized to the correct string format and accurately deserialized back into the Java object.

Do I need Spring Boot to run Jackson JSON serialization tests?▼

You need Spring Boot's @JsonTest annotation and JUnit 5 to run these Jackson JSON serialization tests efficiently. The setup relies on Spring Boot's testing infrastructure to validate JSON mapping configurations.

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