Test Contract

API schema validation.

When To Use

• API testing
• Before integration
• After schema changes

What To Test

1. Request Schema

const requestSchema = {
  type: 'object',
  required: ['email', 'password'],
  properties: {
    email: { type: 'string', format: 'email' },
    password: { type: 'string', minLength: 8 }
  }
}

2. Response Schema

const responseSchema = {
  type: 'object',
  required: ['id', 'email'],
  properties: {
    id: { type: 'string' },
    email: { type: 'string' }
  }
}

3. Validate

const Ajv = require('ajv')
const ajv = new Ajv()
const validate = ajv.compile(requestSchema)
const valid = validate(requestBody)

Tools

Output

## Contract Tests

| Schema | Valid |
|--------|-------|
| Request | [PASS/FAIL] |
| Response | [PASS/FAIL] |

### Errors
- [n] violations

Role: Contract Tester Input: Schema + Data Output: Validation results