API Testing

# Consumer Contract Test (Python)

import pytest
from pact import Consumer, Provider

@pytest.fixture
def pact():
    return Consumer('WebApp').has_pact_with(
        Provider('ValuationAPI'),
        pact_dir='./pacts'
    )

def test_get_valuation(pact):
    expected = {
        'id': '123',
        'value': 299.99,
        'confidence': 0.95,
        'currency': 'USD'
    }
    
    pact.given('a product exists')        .upon_receiving('a valuation request')        .with_request(
            method='GET',
            path='/v2/valuations/123',
            headers={'Authorization': 'Bearer token'}
        )        .will_respond_with(
            status=200,
            headers={'Content-Type': 'application/json'},
            body=Like(expected)
        )
    
    with pact:
        result = api_client.get_valuation('123')
        assert result['value'] == 299.99

# Provider Verification
def test_provider_honors_contracts():
    verifier = Verifier(
        provider='ValuationAPI',
        provider_base_url='http://localhost:8000'
    )
    verifier.verify_pacts('./pacts')