unit-test-json-serialization SKILL.md skillA
unit-test-json-serialization from giuseppe-trisciuoglio/developer-kit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add giuseppe-trisciuoglio/developer-kit/unit-test-json-serialization@git:20260324.a02e282Pins git:20260324.a02e282 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- giuseppe-trisciuoglio/developer-kit
- Path
plugins/developer-kit-java/skills/unit-test-json-serialization/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260324.a02e282, committed Mar 24, 2026
- First version recorded
- Feb 7, 2026
- Size
- 10,272 bytes
- Repository stars
- 367
- License
- MIT
Provides patterns for unit testing JSON serialization/deserialization with Jackson and `@JsonTest`. Validates JSON mapping, custom serializers, date formats, and polymorphic types. Use when testing JSON serialization, validating custom serializers, or writing JSON unit tests in Spring Boot applications.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 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 1. **Annotate test class with `@JsonTest`** → Enables JacksonTester auto-configuration 2. **Autowire JacksonTester for target type** → Provides type-safe JSON assertions 3. **Test serialization** → Call `json.write(object)` and assert JSON paths with `extractingJsonPath*` 4. **Test deserialization** → Call `json.parse(json)` or `json.parseObject(json)` and assert object state 5. **Validate round-trip** → Serialize, then deserialize, verify same data (if object is properly comparable) …
Read the whole file at its exact version.
How to install
mdr add giuseppe-trisciuoglio/developer-kit/unit-test-json-serialization@sha256:d874bbbd2bb7c42eThe line at the top of this page pins the label git:20260324.a02e282, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_dlpao3dryuuvbyzl)
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Versions
The registry has recorded 5 versions of this file, between Feb 7, 2026 and Mar 24, 2026, about one every 11 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260324.a02e282 latest | 2026-03-24 | a02e282 | 10,272 B | A | view · diff |
| git:20260316.91dc3c4 | 2026-03-16 | 91dc3c4 | 12,389 B | A | view · diff |
| git:20260223.c6d4db1 | 2026-02-23 | c6d4db1 | 12,347 B | A | view · diff |
| v1.0.1 | 2026-02-08 | 147afce | 12,448 B | A | view · diff |
| v1.0.1 | 2026-02-07 | 1a732c7 | 10,672 B | A | view |
Audit of the latest version
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- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10272 bytes)
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Source
giuseppe-trisciuoglio/developer-kit · 367 stars · license MIT · pushed 2026-09-10 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dlpao3dryuuvbyzl GET https://markdownregistry.com/api/v1/resolve?ref=giuseppe-trisciuoglio/developer-kit/unit-test-json-serialization GET https://markdownregistry.com/api/v1/blob/d874bbbd2bb7c42ed9d855b6e1b632e5b1cd3b64f05949ab5f32ea52e66b8ad2
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