unit-test-exception-handler SKILL.md skillA
unit-test-exception-handler 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-exception-handler@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-exception-handler/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260324.a02e282, committed Mar 24, 2026
- First version recorded
- Feb 7, 2026
- Size
- 6,287 bytes
- Repository stars
- 367
- License
- MIT
Provides patterns for unit testing `@ExceptionHandler` and `@ControllerAdvice` in Spring Boot applications. Validates error response formatting, mocks exceptions, verifies HTTP status codes, tests field-level validation errors, and asserts custom error payloads. Use when writing Spring exception handler tests, REST API error tests, or mocking controller advice.
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 ExceptionHandler and ControllerAdvice
## Overview
This skill provides patterns for writing unit tests for Spring Boot exception handlers. It covers testing `@ExceptionHandler` methods in `@ControllerAdvice` classes using MockMvc, including HTTP status assertions, JSON response validation, field-level validation error testing, and mocking handler dependencies.
## When to Use
- Writing unit tests for `@ExceptionHandler` methods
- Testing `@ControllerAdvice` global exception handling
- Validating REST API error response formatting
- Mocking exceptions in controller tests
- Testing field-level validation error responses
- Asserting custom error payloads and HTTP status codes
## Instructions
1. **Create a test controller** that throws specific exceptions to trigger each `@ExceptionHandler`
2. **Register ControllerAdvice** via `setControllerAdvice()` on `MockMvcBuilders.standaloneSetup()`
3. **Assert HTTP status codes** with `.andExpect(status().isXxx())`
4. **Verify error response fields** using `jsonPath("$.field")` matchers
5. **Test validation errors** by sending invalid payloads and checking `MethodArgumentNotValidException` produces field-level details
…Read the whole file at its exact version.
How to install
mdr add giuseppe-trisciuoglio/developer-kit/unit-test-exception-handler@sha256:f2ffe6811a00e77dThe 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_xltxan6wcbycsapp)
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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 | 6,287 B | A | view · diff |
| git:20260316.91dc3c4 | 2026-03-16 | 91dc3c4 | 15,955 B | A | view · diff |
| git:20260223.c6d4db1 | 2026-02-23 | c6d4db1 | 15,927 B | A | view · diff |
| v1.0.1 | 2026-02-08 | 147afce | 16,039 B | A | view · diff |
| v1.0.1 | 2026-02-07 | 1a732c7 | 14,135 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6287 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
giuseppe-trisciuoglio/developer-kit · 367 stars · license MIT · pushed 2026-09-10 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xltxan6wcbycsapp GET https://markdownregistry.com/api/v1/resolve?ref=giuseppe-trisciuoglio/developer-kit/unit-test-exception-handler GET https://markdownregistry.com/api/v1/blob/f2ffe6811a00e77d195a69a25341be721e691cc3861ac1fa999560c18508088e
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