test-quality SKILL.md skillA
test-quality from decebals/claude-code-java is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add decebals/claude-code-java/test-quality@git:20260828.702770aPins git:20260828.702770a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- decebals/claude-code-java
- Path
skills/test-quality/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260828.702770a, committed Aug 28, 2026
- Size
- 15,103 bytes
- Repository stars
- 759
- License
- MIT
Write high-quality JUnit 5 tests with AssertJ assertions. Use when user says "add tests", "write tests", "improve test coverage", or when reviewing/creating test classes for Java code.
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
# Test Quality Skill (JUnit 5 + AssertJ)
Write high-quality, maintainable tests for Java projects using modern best practices.
## When to Use
- Writing new test classes
- Reviewing/improving existing tests
- User asks to "add tests" / "improve test coverage"
- Code review mentions missing tests
## Framework Preferences
### JUnit 5 (Jupiter)
```java
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Nested;
import static org.assertj.core.api.Assertions.*;
```
### AssertJ over standard assertions
✅ **Use AssertJ**:
```java
assertThat(plugin.getState())
.as("Plugin should be started after initialization")
.isEqualTo(PluginState.STARTED);
assertThat(plugins)
.hasSize(3)
.extracting(Plugin::getId)
.containsExactly("plugin1", "plugin2", "plugin3");
```
❌ **Avoid JUnit assertions**:
```java
assertEquals(PluginState.STARTED, plugin.getState()); // Less readable
assertTrue(plugins.size() == 3); // Less descriptive failures
```
## Test Structure (AAA Pattern)
Always use Arrange-Act-Assert pattern:
```java
@Test
@DisplayName("Should load plugin from valid directory")
…Read the whole file at its exact version.
How to install
mdr add decebals/claude-code-java/test-quality@sha256:d8c5d6bb8ee2babfThe line at the top of this page pins the label git:20260828.702770a, 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_c3pbezgcbojqf3fs)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 28, 2026.
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 (15103 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
decebals/claude-code-java · 759 stars · license MIT · pushed 2026-09-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_c3pbezgcbojqf3fs GET https://markdownregistry.com/api/v1/resolve?ref=decebals/claude-code-java/test-quality GET https://markdownregistry.com/api/v1/blob/d8c5d6bb8ee2babfc000b2c765c57f4f22629df2cf750d1e7f4aa513372c23c6
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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