Provides patterns for unit testing JSON serialization/deserialization with Jackson and `@JsonTest`. Validates JSON mapping, custom serializers, date formats,…
Unit testing JSON serialization and deserialization with Spring's @JsonTest and Jackson. Covers serialization/deserialization of POJOs, custom serializers/deserializers, field name mappings with @JsonProperty, and null handling using JacksonTester for type-safe assertions Includes patterns for testing nested objects, lists, date/time formatting, and polymorphic types with @JsonTypeInfo Provides Maven and Gradle setup, best practices for avoiding circular references and null inclusion issues, and troubleshooting guidance for common Jackson configuration problems Uses @JsonTest annotation for lightweight JSON-focused test context without full Spring application startup Unit Testing JSON Serialization with @JsonTest Overview Provides patterns for unit testing JSON serialization and deserialization using Spring's @JsonTest 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 @JsonProperty, @JsonIgnore, and field name mappings Testing date/time format handling (LocalDateTime, Date) Testing null handling and missing fields Testing polymorphic type deserialization Instructions
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