jest-generator
Generate Jest unit tests for JavaScript/TypeScript with mocking, coverage. Use for JS/TS modules, React components, test generation, or encountering missing coverage, improper mocking, test structure errors.
91
89%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Passed
No known issues
Quality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a well-crafted skill description that excels across all dimensions. It provides specific capabilities (Jest tests, mocking, coverage), includes natural trigger terms developers would use, explicitly states both what it does and when to use it, and carves out a distinct niche in the JavaScript/TypeScript testing space.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: 'Generate Jest unit tests', 'mocking', 'coverage' for 'JavaScript/TypeScript', 'JS/TS modules', 'React components'. These are concrete, actionable capabilities. | 3 / 3 |
Completeness | Clearly answers both what ('Generate Jest unit tests for JavaScript/TypeScript with mocking, coverage') and when ('Use for JS/TS modules, React components, test generation, or encountering missing coverage, improper mocking, test structure errors'). | 3 / 3 |
Trigger Term Quality | Excellent coverage of natural terms users would say: 'Jest', 'unit tests', 'JavaScript', 'TypeScript', 'JS/TS', 'React components', 'test generation', 'coverage', 'mocking'. These are all terms developers naturally use. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive with clear niche: Jest-specific testing for JS/TS ecosystem. The combination of 'Jest', 'JavaScript/TypeScript', 'React components', and specific error types like 'improper mocking' creates a clear, non-conflicting scope. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
79%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a strong, actionable skill with excellent code examples covering Jest's major features. The content respects Claude's intelligence and provides executable patterns. Main weaknesses are the lack of an explicit test generation workflow with validation checkpoints and the monolithic structure that could benefit from splitting advanced topics into separate files.
Suggestions
Add an explicit workflow section: 1. Analyze source file → 2. Generate test file → 3. Run tests → 4. Check coverage → 5. Add missing cases if coverage < 80%
Consider splitting React component testing and advanced patterns (timers, mocking) into separate referenced files to improve progressive disclosure
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is lean and efficient, providing code examples without explaining what Jest is or how testing works conceptually. Every section delivers actionable patterns without padding. | 3 / 3 |
Actionability | Provides fully executable, copy-paste ready code examples for all major patterns including mocking, async testing, timers, and React components. Commands for running tests are specific and complete. | 3 / 3 |
Workflow Clarity | The quality checklist provides good validation steps, but the workflow for generating tests lacks explicit sequencing. No clear 'generate -> run -> verify coverage -> fix' feedback loop is defined. | 2 / 3 |
Progressive Disclosure | Content is well-organized with clear sections, but everything is inline in one file. For a skill this comprehensive (~150 lines), React testing and advanced patterns could be split into referenced files. | 2 / 3 |
Total | 10 / 12 Passed |
Validation
90%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 10 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
allowed_tools_field | 'allowed-tools' contains unusual tool name(s) | Warning |
Total | 10 / 11 Passed | |
- Repository
- secondsky/claude-skills
- Commit
90d6bd7
- Reviewed
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