api-test-suite-builder

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API Test Suite Builder

API测试套件构建工具

Tier: POWERFUL Category: Engineering Domain: Testing / API Quality

Overview

概述

Scans API route definitions across frameworks (Next.js App Router, Express, FastAPI, Django REST) and auto-generates comprehensive test suites covering auth, input validation, error codes, pagination, file uploads, and rate limiting. Outputs ready-to-run test files for Vitest+Supertest (Node) or Pytest+httpx (Python).

扫描多种框架（Next.js App Router、Express、FastAPI、Django REST）的API路由定义，自动生成涵盖认证、输入验证、错误码、分页、文件上传和速率限制的全面测试套件。输出可直接运行的测试文件，支持Vitest+Supertest（Node）或Pytest+httpx（Python）。

Core Capabilities

核心能力

Route detection — scan source files to extract all API endpoints
Auth coverage — valid/invalid/expired tokens, missing auth header
Input validation — missing fields, wrong types, boundary values, injection attempts
Error code matrix — 400/401/403/404/422/500 for each route
Pagination — first/last/empty/oversized pages
File uploads — valid, oversized, wrong MIME type, empty
Rate limiting — burst detection, per-user vs global limits

路由检测 — 扫描源文件提取所有API端点
认证覆盖 — 有效/无效/过期令牌、缺失认证头
输入验证 — 缺失字段、错误类型、边界值、注入尝试
错误码矩阵 — 每个路由覆盖400/401/403/404/422/500错误
分页测试 — 首页/末页/空页/超出范围页面
文件上传测试 — 有效文件、超大文件、错误MIME类型、空文件
速率限制测试 — 突发请求检测、用户级与全局限制

When to Use

使用场景

New API added — generate test scaffold before writing implementation (TDD)
Legacy API with no tests — scan and generate baseline coverage
API contract review — verify existing tests match current route definitions
Pre-release regression check — ensure all routes have at least smoke tests
Security audit prep — generate adversarial input tests

新增API时 — 在编写实现前生成测试脚手架（测试驱动开发TDD）
无测试的遗留API — 扫描并生成基础测试覆盖
API契约评审 — 验证现有测试是否匹配当前路由定义
发布前回归检查 — 确保所有路由至少有冒烟测试
安全审计准备 — 生成对抗性输入测试

Route Detection

路由检测

Next.js App Router

bash

undefined

bash

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Find all route handlers

查找所有路由处理器

find ./app/api -name "route.ts" -o -name "route.js" | sort

Extract HTTP methods from each route file

从每个路由文件中提取HTTP方法

grep -rn "export async function|export function" app/api/**/route.ts |
grep -oE "(GET|POST|PUT|PATCH|DELETE|HEAD|OPTIONS)" | sort -u

Full route map

完整路由映射

find ./app/api -name "route.ts" | while read f; do route=$(echo $f | sed 's|./app||' | sed 's|/route.ts||') methods=$(grep -oE "export (async )?function (GET|POST|PUT|PATCH|DELETE)" "$f" |
grep -oE "(GET|POST|PUT|PATCH|DELETE)") echo "$methods $route" done

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Express

bash

undefined

bash

undefined

Find all router files

查找所有路由文件

Extract routes with line numbers

提取带行号的路由

Generate route map

生成路由映射

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FastAPI

bash

undefined

bash

undefined

Find all route decorators

查找所有路由装饰器

Extract with path and function name

提取路径和函数名

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Django REST Framework

bash

undefined

bash

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urlpatterns extraction

提取urlpatterns

ViewSet router registration

ViewSet路由注册

grep -rn "router.register|DefaultRouter|SimpleRouter" . --include="*.py"

---

grep -rn "router.register|DefaultRouter|SimpleRouter" . --include="*.py"

---

Test Generation Patterns

测试生成模式

Auth Test Matrix

认证测试矩阵

For every authenticated endpoint, generate:

Test Case	Expected Status
No Authorization header	401
Invalid token format	401
Valid token, wrong user role	403
Expired JWT token	401
Valid token, correct role	2xx
Token from deleted user	401

针对每个需要认证的端点，生成以下测试：

测试用例	预期状态码
无Authorization头	401
无效令牌格式	401
有效令牌，但用户角色错误	403
过期JWT令牌	401
有效令牌，角色正确	2xx
已删除用户的令牌	401

Input Validation Matrix

输入验证矩阵

For every POST/PUT/PATCH endpoint with a request body:

Test Case	Expected Status
Empty body `{}`	400 or 422
Missing required fields (one at a time)	400 or 422
Wrong type (string where int expected)	400 or 422
Boundary: value at min-1	400 or 422
Boundary: value at min	2xx
Boundary: value at max	2xx
Boundary: value at max+1	400 or 422
SQL injection in string field	400 or 200 (sanitized)
XSS payload in string field	400 or 200 (sanitized)
Null values for required fields	400 or 422

针对每个带请求体的POST/PUT/PATCH端点：

测试用例	预期状态码
空请求体 `{}`	400 或 422
缺失必填字段（逐个测试）	400 或 422
类型错误（预期整数传入字符串）	400 或 422
边界值：最小值-1	400 或 422
边界值：最小值	2xx
边界值：最大值	2xx
边界值：最大值+1	400 或 422
字符串字段中注入SQL语句	400 或 200（已 sanitize）
字符串字段中传入XSS载荷	400 或 200（已 sanitize）
必填字段传入Null值	400 或 422

Example Test Files

示例测试文件

→ See references/example-test-files.md for details

→ 详情请查看 references/example-test-files.md

Generating Tests from Route Scan

从路由扫描生成测试

When given a codebase, follow this process:

Scan routes using the detection commands above
Read each route handler to understand:
- Expected request body schema
- Auth requirements (middleware, decorators)
- Return types and status codes
- Business rules (ownership, role checks)
Generate test file per route group using the patterns above

Name tests descriptively:

"returns 401 when token is expired"

not

"auth test 3"

Use factories/fixtures for test data — never hardcode IDs
Assert response shape, not just status code

给定代码库时，遵循以下流程：

扫描路由 — 使用上述检测命令
读取每个路由处理器，了解：
- 预期请求体 schema
- 认证要求（中间件、装饰器）
- 返回类型和状态码
- 业务规则（归属、角色校验）
按路由组生成测试文件 — 遵循上述模式
测试命名要清晰：使用
```
"令牌过期时返回401"
```
而非
```
"auth test 3"
```
使用工厂/夹具生成测试数据 — 绝不硬编码ID
断言响应结构 — 不只是断言状态码

Common Pitfalls

常见陷阱

Testing only happy paths — 80% of bugs live in error paths; test those first
Hardcoded test data IDs — use factories/fixtures; IDs change between environments
Shared state between tests — always clean up in afterEach/afterAll
Testing implementation, not behavior — test what the API returns, not how it does it
Missing boundary tests — off-by-one errors are extremely common in pagination and limits
Not testing token expiry — expired tokens behave differently from invalid ones
Ignoring Content-Type — test that API rejects wrong content types (xml when json expected)

仅测试正常路径 — 80%的bug出现在错误路径；优先测试这些场景
硬编码测试数据ID — 使用工厂/夹具；ID在不同环境中会变化
测试间共享状态 — 务必在afterEach/afterAll中清理
测试实现而非行为 — 测试API返回结果，而非内部实现逻辑
缺失边界测试 — 分页和限制中极易出现差一错误
未测试令牌过期 — 过期令牌与无效令牌行为不同
忽略Content-Type — 测试API是否拒绝错误的内容类型（如预期JSON却传入XML）

Best Practices

最佳实践

One describe block per endpoint — keeps failures isolated and readable
Seed minimal data — don't load the entire DB; create only what the test needs
Use
```
beforeAll
```
for shared setup,
```
afterAll
```
for cleanup — not
```
beforeEach
```
for expensive ops
Assert specific error messages/fields, not just status codes
Test that sensitive fields (password, secret) are never in responses
For auth tests, always test the "missing header" case separately from "invalid token"
Add rate limit tests last — they can interfere with other test suites if run in parallel

每个端点对应一个describe块 — 隔离失败场景，提升可读性
生成最小化测试数据 — 不要加载整个数据库；仅创建测试所需数据
使用
```
beforeAll
```
做共享初始化，
```
afterAll
```
做清理 — 昂贵操作不要用
```
beforeEach
```
断言具体错误信息/字段，而非仅状态码
测试敏感字段（密码、密钥）绝不会出现在响应中
认证测试中，务必将"缺失请求头"与"无效令牌"场景分开测试
最后添加速率限制测试 — 并行运行时可能干扰其他测试套件