diff --git a/app/test/test_bug551_XieShangHai.py b/app/test/test_bug551_XieShangHai.py
new file mode 100644
index 0000000..4aa02f2
--- /dev/null
+++ b/app/test/test_bug551_XieShangHai.py
@@ -0,0 +1,49 @@
+import pytest
+from selenium import webdriver
+from selenium.webdriver.common.action_chains import ActionChains
+import time
+from webdriver_manager.chrome import ChromeDriverManager
+
+@pytest.fixture
+def driver():
+    # 初始化浏览器驱动
+    driver = webdriver.Chrome(ChromeDriverManager().install())
+    driver.maximize_window()
+
+    yield driver
+    # 测试结束后关闭浏览器
+    driver.quit()
+
+def test_highlight(driver):
+    # 打开网页
+    driver.get("http://127.0.0.1:5000/")
+
+    # login
+    elem = driver.find_element_by_link_text('登录')
+    elem.click()
+    uname = 'xshh'
+    password = 'kk123ll'
+    elem = driver.find_element_by_id('username')
+    elem.send_keys(uname)
+    elem = driver.find_element_by_id('password')
+    elem.send_keys(password)
+
+    elem = driver.find_element_by_class_name('btn')  # 找到登录按钮
+    elem.click()
+
+    article = driver.find_element_by_id("article")
+
+    # 创建 ActionChains 对象
+    actions = ActionChains(driver)
+
+    # 移动鼠标到起点位置
+    actions.move_to_element(article)
+    # 按下鼠标左键
+    actions.click_and_hold()
+    # 拖动鼠标到结束位置
+    actions.move_by_offset(450,60)
+    # 释放鼠标左键
+    actions.release()
+    # 执行操作链
+    actions.perform()
+    time.sleep(15)