How do I handle null values in my serialization tests?

The skill includes specific test cases to verify if null fields are correctly included or excluded from the output JSON based on your @JsonInclude configuration.

What assertion libraries are used in these patterns?

The patterns primarily utilize Spring's JacksonTester in combination with AssertJ, allowing for readable, type-safe assertions on specific JSON paths.

Why use @JsonTest instead of @SpringBootTest?

@JsonTest is a specialized test slice that only loads JSON-related beans. This makes tests significantly faster and more focused than @SpringBootTest, which loads the entire application context.

Can I test polymorphic objects with this skill?

Absolutely. The skill provides patterns for testing @JsonTypeInfo and @JsonSubTypes to ensure correct deserialization of inheritance hierarchies and interface implementations.

Does this skill support custom date formats?

Yes, it includes patterns for testing LocalDateTime and other temporal types, ensuring they match ISO-8601 standards or custom @JsonFormat requirements.

Java JSON Serialization Testing

Name: Java JSON Serialization Testing
Author: giuseppe-trisciuoglio

bygiuseppe-trisciuoglio

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126

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セキュリティとテスト

Implements robust unit tests for Java JSON serialization and deserialization using Spring's @JsonTest and Jackson.

This skill streamlines the process of validating Data Transfer Objects (DTOs) by providing standardized patterns for JSON mapping tests in Spring Boot applications. It leverages the @JsonTest slice to perform high-speed validation of Jackson annotations, custom serializers, and complex nested structures without the overhead of a full application context. Developers can quickly ensure that API contracts remain intact, handle edge cases like null values or specific date formats, and verify polymorphic type handling with type-safe assertions using JacksonTester.

主な機能

01Automated @JsonTest configuration for focused unit testing

02Type-safe assertions using Spring's JacksonTester and AssertJ

03126 GitHub stars

04Validation of complex nested objects and polymorphic types

05Support for custom Jackson serializers and deserializers

06Precise testing for ISO-8601 date/time formatting and null handling

ユースケース

01Verifying DTO mapping accuracy against REST API specifications

02Testing custom logic within specialized Jackson serializers

03Ensuring backward compatibility of JSON structures during refactoring

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add giuseppe-trisciuoglio/developer-kit unit-test-json-serialization

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