10.2 登录测试

登录功能是电商网站的核心功能之一。我们将编写测试用例来验证用户是否能够成功登录，以及处理登录失败的情况。

**页面对象：登录页面**

Python复制

```python
# pages/login_page.py
from selenium.webdriver.common.by import By

class LoginPage:
    def __init__(self, driver):
        self.driver = driver
        self.url = "https://www.saucedemo.com/"
        self.username_input = (By.ID, "user-name")
        self.password_input = (By.ID, "password")
        self.login_button = (By.ID, "login-button")

def open(self):
        self.driver.get(self.url)

def login(self, username, password):
        self.driver.find_element(*self.username_input).send_keys(username)
        self.driver.find_element(*self.password_input).send_keys(password)
        self.driver.find_element(*self.login_button).click()
```

**测试用例：登录测试**

Python复制

```python
# tests/test_login.py
import pytest
from pages.login_page import LoginPage

@pytest.fixture
def browser():
    driver = webdriver.Chrome()
    yield driver
    driver.quit()

def test_login_success(browser):
    login_page = LoginPage(browser)
    login_page.open()
    login_page.login("standard_user", "secret_sauce")
    assert "inventory.html" in browser.current_url

def test_login_failure(browser):
    login_page = LoginPage(browser)
    login_page.open()
    login_page.login("invalid_user", "invalid_password")
    error_message = browser.find_element(By.CSS_SELECTOR, "h3[data-test='error']").text
    assert "Epic sadface" in error_message
```

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