Does this skill support MapStruct specifically?

Yes, it includes specialized patterns for testing MapStruct interfaces using Mappers.getMapper() for standalone unit tests and Spring-integrated approaches.

How does it handle nested objects?

The skill includes patterns for verifying deep object hierarchies, including lists and nested DTOs, utilizing AssertJ's recursive comparison for deep verification.

Can I use this for custom, non-MapStruct converters?

Absolutely. It provides templates for testing static utility classes and custom logic for complex type conversions such as Date formatting and custom business logic.

Why should I test mappers in isolation?

Testing mappers as unit tests ensures data integrity at the transformation layer without the overhead of starting a full application context or database.

Java Mapper & Converter Unit Testing

Name: Java Mapper & Converter Unit Testing
Author: pur3v4d3r

bypur3v4d3r

•

Security & Testing

Generates and validates comprehensive unit tests for MapStruct mappers and custom data converters.

About

This skill provides specialized guidance for testing the data transformation layer of Java applications, specifically targeting MapStruct mappers and custom converter classes. It enables developers to verify field mapping accuracy, handle complex nested object hierarchies, and ensure robust null-safety and type conversions between DTOs and domain entities. By implementing these standardized patterns, developers can achieve high test coverage for isolation-based transformation logic, catching mapping errors early before they reach integration or production environments.

Key Features

Bidirectional and partial update mapping verification
Fluent assertions using AssertJ and recursive comparison
Custom enum and type conversion test patterns
Nested object and collection mapping validation
Automated MapStruct mapper test generation
1 GitHub stars

Use Cases

Verifying complex DTO to Entity transformations in Spring Boot applications
Validating mapping logic for large, nested domain models
Ensuring null-safety and edge-case handling in custom data converters

About

Key Features

Bidirectional and partial update mapping verification
Fluent assertions using AssertJ and recursive comparison
Custom enum and type conversion test patterns
Nested object and collection mapping validation
Automated MapStruct mapper test generation
1 GitHub stars

Use Cases

Verifying complex DTO to Entity transformations in Spring Boot applications
Validating mapping logic for large, nested domain models
Ensuring null-safety and edge-case handling in custom data converters