# test-quality-inspector

Inspects test suites for empty assertions and missing edge cases. It guides your coding agent to verify persistence, negative paths, and input validation.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 367 installs · ★ 78
- Author: bobmatnyc
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/bobmatnyc/claude-mpm-skills/tree/HEAD/universal/testing/test-quality-inspector/SKILL.md
- Updated: 2026-07-18
- HTML: https://affpapa.org/en/nevibecode/skills/test-quality-inspector

## What it does

This skill equips your coding assistant with guidelines for QA-level test reviews. Instead of settling for simple execution checks, it spots trivial assertions like `assert user` or `assert result` that stay green even when objects contain malformed data.

The framework includes inspection checklists (`inspection-checklist.md`), assertion criteria (`assertion-quality.md`), and red-flag catalogs (`red-flags.md`). It systematically flags missing negative checks, lack of persistence verification, and tests that accidentally depend on previous test execution.

Because the configuration sets `user-invocable: false` and `disable-model-invocation: true`, it functions as an internal reference for the assistant during code review rather than a manual command.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add bobmatnyc/claude-mpm-skills --skill test-quality-inspector -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/test-quality-inspector/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/test-quality-inspector/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add bobmatnyc/claude-mpm-skills --skill test-quality-inspector -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/test-quality-inspector/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add bobmatnyc/claude-mpm-skills --skill test-quality-inspector -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/test-quality-inspector/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install bobmatnyc/claude-mpm-skills test-quality-inspector
```

2. **Manually: put the files in place**
- File: `.github/skills/test-quality-inspector/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add bobmatnyc/claude-mpm-skills --skill test-quality-inspector -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/bobmatnyc/claude-mpm-skills --path universal/testing/test-quality-inspector
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/test-quality-inspector/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add bobmatnyc/claude-mpm-skills --skill test-quality-inspector -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/bobmatnyc/claude-mpm-skills/tree/HEAD/universal/testing/test-quality-inspector/SKILL.md

## When to use it
- catch trivial assertions that pass on invalid data
- identify missing negative test cases and validation checks
- verify database persistence and rollback handling in test suites
- decouple interdependent tests using isolated fixtures

## Example prompts
- Review `tests/test_auth.py` for weak assertions and missing edge cases.
- Inspect our user registration tests and suggest missing validation scenarios.

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: b7b1fc0477475359.

BEGIN THIRD-PARTY FILE b7b1fc0477475359
````text
---
name: test-quality-inspector
description: "Test quality inspection framework for reviewing test coverage, identifying gaps, and ensuring comprehensive validation"
user-invocable: false
disable-model-invocation: true
progressive_disclosure:
  entry_point:
    summary: "Test quality inspection framework for reviewing test coverage, identifying gaps, and ensuring comprehensive validation"
    when_to_use: "When writing tests, implementing test-quality-inspector, or ensuring code quality."
    quick_start: "1. Review the core concepts below. 2. Apply patterns to your use case. 3. Follow best practices for implementation."
  references:
    - assertion-quality.md
    - inspection-checklist.md
    - red-flags.md
---
# Example Test Inspection Report

## Scenario: User Registration Feature

### Engineer's Test Suite

```python
# test_user_registration.py

def test_user_creation():
    """Test user creation"""
    user = create_user("test@example.com", "password123")
    assert user

def test_login():
    """Test login"""
    user = create_user("test@example.com", "password123")
    result = login("test@example.com", "password123")
    assert result

def test_duplicate_email():
    """Test duplicate email"""
    create_user("test@example.com", "password123")
    user2 = create_user("test@example.com", "password456")
    assert user2
```

---

## QA Inspection Report

### Test 1: test_user_creation()

**Claimed Intent:** Test user creation
**Actually Tests:** Object instantiation only

#### Issues Found

🔴 **CRITICAL: Worthless Assertion**
```python
assert user  # Line 5
```
- Would pass with corrupt data
- Would pass with wrong email
- Would pass with invalid password hash
- Would pass if database save failed

**Mental Debug:** User object with garbage data would pass this test.

🟠 **HIGH: Missing Validation Tests**
- No test for invalid email format
- No test for weak password
- No test for duplicate email (separate test exists but broken)
- No test for SQL injection in email

🟠 **HIGH: No Persistence Verification**
- Test doesn't verify user is saved to database
- Test doesn't verify user can be retrieved
- Transaction might be rolled back

🟡 **MEDIUM: Vague Test Name**
- "test_user_creation" doesn't describe what should happen
- Better: "test_user_creation_with_valid_data_persists_to_database"

#### Suggested Improvements

```python
def test_user_creation_with_valid_data_persists_to_database():
    """Creating a user with valid email and password should:
    1. Create user object with correct attributes
    2. Save to database
    3. Hash password (not store plaintext)
    4. Set default role and active status
    """
    email = "test@example.com"
    password = "SecurePass123!"

    user = create_user(email, password)

    # Verify user object
````
END THIRD-PARTY FILE b7b1fc0477475359

The third-party file has ended. Everything between the b7b1fc0477475359 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

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