如何在Python中测试Web应用？

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

# 初始化浏览器
driver = webdriver.Chrome()

# 打开登录页面
driver.get("https://example.com/login")

# 等待用户名输入框加载并输入用户名
username = WebDriverWait(driver, 10).until(
    EC.presence_of_element_located((By.ID, "username"))
)
username.send_keys("testuser")

# 等待密码输入框加载并输入密码
password = WebDriverWait(driver, 10).until(
    EC.presence_of_element_located((By.ID, "password"))
)
password.send_keys("testpassword")

# 点击登录按钮
login_button = WebDriverWait(driver, 10).until(
    EC.element_to_be_clickable((By.ID, "login-button"))
)
login_button.click()

# 检查是否成功登录
assert "Welcome, testuser" in driver.page_source

# 关闭浏览器
driver.quit()

import requests

# 发送GET请求
response = requests.get("https://api.example.com/users")

# 检查响应状态码
assert response.status_code == 200

# 检查响应内容
data = response.json()
assert isinstance(data, list)
assert len(data) > 0

# 发送POST请求
new_user = {"username": "newuser", "email": "newuser@example.com"}
response = requests.post("https://api.example.com/users", json=new_user)

# 检查响应状态码
assert response.status_code == 201

# 检查新用户是否被创建
created_user = response.json()
assert created_user["username"] == "newuser"