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使用pytest进行API测试主要涉及以下几个步骤:
首先,确保你已经安装了pytest。你可以使用pip来安装:
pip install pytest
创建一个Python文件,通常命名为test_api.py
或其他你喜欢的名字。
在测试文件中,编写测试用例。你可以使用requests
库来发送HTTP请求。
import requests
import pytest
BASE_URL = "https://api.example.com"
def test_get_endpoint():
response = requests.get(f"{BASE_URL}/endpoint")
assert response.status_code == 200
assert "expected_key" in response.json()
def test_post_endpoint():
payload = {"key": "value"}
response = requests.post(f"{BASE_URL}/endpoint", json=payload)
assert response.status_code == 201
assert response.json()["key"] == "value"
def test_put_endpoint():
payload = {"key": "new_value"}
response = requests.put(f"{BASE_URL}/endpoint/1", json=payload)
assert response.status_code == 200
assert response.json()["key"] == "new_value"
def test_delete_endpoint():
response = requests.delete(f"{BASE_URL}/endpoint/1")
assert response.status_code == 204
为了使测试更加模块化和可重用,可以使用pytest的fixture功能。
import requests
import pytest
BASE_URL = "https://api.example.com"
@pytest.fixture(scope="module")
def session():
session = requests.Session()
yield session
session.close()
def test_get_endpoint(session):
response = session.get(f"{BASE_URL}/endpoint")
assert response.status_code == 200
assert "expected_key" in response.json()
def test_post_endpoint(session):
payload = {"key": "value"}
response = session.post(f"{BASE_URL}/endpoint", json=payload)
assert response.status_code == 201
assert response.json()["key"] == "value"
在命令行中运行pytest来执行测试:
pytest test_api.py
@pytest.mark.parametrize
装饰器来参数化测试用例。unittest.mock
或responses
库来模拟HTTP请求和响应。pytest-html
插件生成HTML格式的测试报告。import requests
import pytest
BASE_URL = "https://api.example.com"
@pytest.mark.parametrize("payload, expected_status", [
({"key": "value"}, 201),
({"key": "another_value"}, 200),
])
def test_post_endpoint(session, payload, expected_status):
response = session.post(f"{BASE_URL}/endpoint", json=payload)
assert response.status_code == expected_status
通过这些步骤,你可以使用pytest进行基本的API测试,并根据需要扩展和改进你的测试套件。
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