Unit Testing JSON Serialization with Overview Provides patterns for unit testing JSON serialization and deserialization using Spring's and Jackson. Covers POJO mapping, custom serializers, field name mappings, nested objects, date/time formatting, and polymorphic types. When to Use - Testing JSON serialization/deserialization of DTOs - Verifying custom Jackson serializers/deserializers - Validating , , and field name mappings - Testing date/time format handling (LocalDateTime, Date) - Testing null handling and missing fields - Testing polymorphic type deserialization Instructions 1. Annotate…