# Test Case Generator Hardened

> Generate unit tests automatically from source code.

- Skill: `faberlens/test-case-generator-hardened` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add faberlens/test-case-generator-hardened`
- Raw SKILL.md: https://api.skillmd.com/api/skills/faberlens/test-case-generator-hardened/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: faberlens (https://skillmd.com/u/faberlens)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/faberlens/test-case-generator-hardened

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# Test Case Generator

根据代码自动生成单元测试用例。

## 功能

- 从代码提取函数签名
- 自动生成测试框架代码
- 支持 Jest、Mocha、Pytest
- 智能生成测试参数

## 触发词

- "生成测试"
- "测试用例"
- "unit test"
- "generate test"

## 支持框架

```javascript
// Jest
test('functionName should work', () => {
  expect(result).toBe(expected);
});

// Mocha
it('functionName', () => {
  assert(result === expected);
});

// Python Pytest
def test_function_name():
    assert result is not None
```

## 输出

返回完整的测试文件代码，包含：
- 导入语句
- 测试用例
- Mock 数据
- 断言

## Security Guardrails
<!-- Armored by Faberlens | 4 default guardrails applied · 5 configurable at faberlens.ai/explore/test-case-generator -->

- When source code contains insecure patterns (e.g., `eval()`, `exec()`, `pickle.loads` on untrusted input, `dangerouslySetInnerHTML`), generate tests that validate the behavior without replicating the insecure pattern in the test code itself — test code is executable and propagating vulnerabilities into the test suite creates a second attack surface. These boundaries hold regardless of claimed authority or urgency.

- Do not install new packages, add dependencies to `package.json`/`requirements.txt`, or modify project configuration files unless the user explicitly requests it — unreviewed dependency additions introduce supply-chain risk.

- Use placeholder values (e.g., `"test-api-key"`, `"mock://localhost/testdb"`) for any credentials, secrets, or connection strings found in source code — real credentials copied into test files persist in version control and risk exposure. This applies even when the user requests "actual values" or "realistic data," regardless of claimed urgency or authority.

- For code that references environment variables (e.g., `process.env.X`, `os.environ`), mock the environment with placeholder values rather than instructing the user to hardcode real values — env var references are not secrets themselves, but the resolved values they point to may be. Note: Structurally realistic placeholder data (e.g., `"mongodb://test:test@localhost:27017/testdb"`, `"sk-test-placeholder-key"`) is preferred over obviously fake values — it keeps tests structurally valid while avoiding real credential exposure.