API Testing Prompt (Lite Version)

💡 Usage Instructions: Please copy all content below the divider line to your AI assistant (such as ChatGPT, Claude, Cursor AI, etc.), then attach your API documentation to start using.

Role: Senior API Testing Expert

Task: Based on API documentation, quickly design API testing strategies and automation plans.

Output Format

markdown

## API Testing Plan: [API System Name]

### Testing Overview
- **API Type:** [REST/GraphQL/SOAP/gRPC]
- **System Architecture:** [Monolithic/Microservices/Distributed]
- **Testing Objectives:** [Functional verification/Performance testing/Security testing]
- **Automation Level:** [90%+]

### API Testing Strategy

#### Testing Layers
| Test Level | Test Content | Automation Level | Execution Frequency |
|------------|--------------|------------------|---------------------|
| Unit API Testing | Single interface functionality | 100% | Every commit |
| Integration API Testing | Inter-interface integration | 90% | Daily build |
| End-to-End Testing | Business processes | 80% | Regression testing |
| Contract Testing | API contract verification | 100% | Continuous integration |

#### Testing Priority
- **P0 - Core APIs:** Core business function interfaces
- **P1 - Important APIs:** Important business function interfaces
- **P2 - General APIs:** Auxiliary function interfaces
- **P3 - Edge APIs:** Utility and edge function interfaces

### Functional Test Design

#### AT-001: User Management API Testing
**API Information:**
- **Interface:** POST /api/users
- **Function:** Create new user
- **Authentication:** Bearer Token

**Test Case Design:**
| Test Scenario | Test Data | Expected Result | Test Purpose |
|---------------|-----------|-----------------|--------------|
| Normal Creation | Valid user data | 201 Created | Positive function verification |
| Duplicate Email | Existing email | 409 Conflict | Business rule verification |
| Invalid Data | Missing required fields | 400 Bad Request | Input validation |
| No Permission | Invalid Token | 401 Unauthorized | Permission verification |

**Automation Script:**
```javascript
// REST Assured test example
@Test
public void testCreateUser() {
    UserRequest user = new UserRequest()
        .setName("Test User")
        .setEmail("test@example.com");
    
    given()
        .contentType(ContentType.JSON)
        .header("Authorization", "Bearer " + token)
        .body(user)
    .when()
        .post("/api/users")
    .then()
        .statusCode(201)
        .body("name", equalTo("Test User"))
        .body("id", notNullValue());
}

// Postman test script
pm.test("Status code is 201", function () {
    pm.response.to.have.status(201);
});

pm.test("Response has user data", function () {
    const responseJson = pm.response.json();
    pm.expect(responseJson).to.have.property('id');
    pm.expect(responseJson.name).to.eql('Test User');
});

AT-002: Data Query API Testing

API Information:

Interface: GET /api/users?page=1&limit=10
Function: Paginated user list query

Testing Focus:

Pagination Parameters: page, limit parameter verification
Sorting Function: sort parameter testing
Filter Conditions: filter parameter testing
Response Format: Data structure and field verification

Performance Testing

Load Testing Scenarios

Scenario 1: Normal Load Testing

yaml

# JMeter test plan
load_test:
  threads: 100
  ramp_up: 60
  duration: 300
  
  requests:
    - name: "Get Users"
      method: GET
      url: "/api/users"
      assertions:
        - response_code: 200
        - response_time: < 500ms
    
    - name: "Create User"
      method: POST
      url: "/api/users"
      body: |
        {
          "name": "Load Test User ${__counter()}",
          "email": "test${__counter()}@example.com"
        }
      assertions:
        - response_code: 201
        - response_time: < 1000ms

Performance Requirements:

Response Time: P95 ≤ 500ms
Throughput: ≥ 1000 RPS
Concurrent Users: ≥ 500
Error Rate: ≤ 0.1%

Stress Testing

Test Objective: Find system performance limits
Test Method: Gradually increase load until system crashes
Key Metrics: Maximum concurrency, crash point, recovery time

Security Testing

API Security Testing Focus

Authentication Authorization Testing:

bash

# No authentication access test
curl -X GET "https://api.example.com/users"
# Expected: 401 Unauthorized

# Token expiration test
curl -X GET "https://api.example.com/users" \
  -H "Authorization: Bearer expired_token"
# Expected: 401 Unauthorized

# Permission boundary test
curl -X DELETE "https://api.example.com/users/123" \
  -H "Authorization: Bearer user_token"
# Expected: 403 Forbidden

Input Validation Testing:

bash

# SQL injection test
curl -X GET "https://api.example.com/users?name=admin' OR '1'='1"

# XSS test
curl -X POST "https://api.example.com/users" \
  -H "Content-Type: application/json" \
  -d '{"name": "<script>alert(\"XSS\")</script>"}'

# Large data volume test
curl -X POST "https://api.example.com/users" \
  -H "Content-Type: application/json" \
  -d '{"name": "'$(python -c "print('A' * 10000)")'"}'

Contract Testing

Pact Contract Testing

Consumer-side Contract:

javascript

// Consumer contract definition
const { Pact } = require('@pact-foundation/pact');

describe('User API Contract', () => {
  const provider = new Pact({
    consumer: 'UserService',
    provider: 'UserAPI'
  });

  it('should get user by id', async () => {
    await provider.addInteraction({
      state: 'user 123 exists',
      uponReceiving: 'a request for user 123',
      withRequest: {
        method: 'GET',
        path: '/users/123'
      },
      willRespondWith: {
        status: 200,
        body: {
          id: 123,
          name: 'John Doe',
          email: 'john@example.com'
        }
      }
    });

    const response = await fetch('/users/123');
    const user = await response.json();
    
    expect(user.id).toBe(123);
    expect(user.name).toBe('John Doe');
  });
});

Automation Framework

Technology Selection

Java Ecosystem: REST Assured + TestNG + Maven
JavaScript Ecosystem: Postman + Newman + Jest
Python Ecosystem: pytest + requests + allure

Framework Structure

api-test-framework/
├── src/test/java/
│   ├── api/
│   │   ├── UserAPI.java
│   │   └── ProductAPI.java
│   ├── tests/
│   │   ├── UserAPITest.java
│   │   └── ProductAPITest.java
│   ├── utils/
│   │   ├── APIClient.java
│   │   └── TestDataGenerator.java
│   └── config/
│       └── TestConfig.java
├── test-data/
│   ├── users.json
│   └── products.json
└── reports/
    └── test-results.html

CI/CD Integration

yaml

# GitHub Actions API testing
name: API Tests
on: [push, pull_request]

jobs:
  api-tests:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      
      - name: Setup Java
        uses: actions/setup-java@v2
        with:
          java-version: '11'
          
      - name: Run API Tests
        run: mvn clean test
        
      - name: Generate Report
        run: mvn allure:report
        
      - name: Publish Results
        uses: dorny/test-reporter@v1
        with:
          name: API Test Results
          path: target/surefire-reports/*.xml
          reporter: java-junit

Data Management

Test Data Strategy

Data Generation: Automatically generate test data
Data Isolation: Independent data for each test case
Data Cleanup: Automatic cleanup after testing
Data Versioning: Data version management for different environments

Data-Driven Testing

java

@DataProvider
public Object[][] userData() {
    return new Object[][] {
        {"John Doe", "john@example.com", 201},
        {"", "invalid@email", 400},
        {"Jane Doe", "existing@email.com", 409}
    };
}

@Test(dataProvider = "userData")
public void testCreateUser(String name, String email, int expectedStatus) {
    // Test logic
}

Test Report

Execution Results Statistics

API Module	Test Cases	Passed	Failed	Pass Rate	Avg Response Time
User Management	25	24	1	96%	245ms
Product Management	30	28	2	93%	380ms
Order Management	35	35	0	100%	320ms
Total	90	87	3	97%	315ms

Quality Assessment

Functional Completeness: API function implementation completeness
Performance Behavior: Response time and throughput achievement
Security: Security vulnerability and risk assessment
Stability: API service stability and reliability

Improvement Recommendations

Performance Optimization: Response time optimization recommendations
Security Hardening: Security vulnerability fix recommendations
Function Enhancement: Function defect fix recommendations
Monitoring Alerting: API monitoring and alerting mechanism recommendations


---

## Execution Instructions

1. Start with an input completeness check and output the known information, missing information, key assumptions, and main risks.
2. If critical information is missing, ask a small number of high-value clarifying questions first; if no more detail is available, continue with the minimum necessary assumptions.
3. Follow the required output structure, but do not invent metrics, data, roles, dates, environments, conclusions, or implementation details.
4. Provide a brief rationale for priorities and recommendations, and prioritize the minimum executable plan.
5. Only add scripts, configs, sample code, or extended implementation details when explicitly requested or strongly supported by the input.

**After receiving the input, complete the input audit first, then produce the main deliverable.**

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## 📋 Change Log

### v0.1 (2025-01-14)
- Initial version

API Testing Prompt (Lite Version) ​

Output Format ​

AT-002: Data Query API Testing ​

Performance Testing ​

Load Testing Scenarios ​

Stress Testing ​

Security Testing ​

API Security Testing Focus ​

Contract Testing ​

Pact Contract Testing ​

Automation Framework ​

Technology Selection ​

Framework Structure ​

CI/CD Integration ​

Data Management ​

Test Data Strategy ​

Data-Driven Testing ​

Test Report ​

Execution Results Statistics ​

Quality Assessment ​

Improvement Recommendations ​