【转】python单例模式&selenium driver实现单例

lsekfe

一、使用装饰器实现单例

1. def Singleton(cls):
   
2.     _instance = {}
   
3. 
   
4.     def _singleton(*args, **kargs):
   
5.         if cls not in _instance:
   
6.             _instance[cls] = cls(*args, **kargs)
   
7.         return _instance[cls]
   
8. 
   
9.     return _singleton
   
10. 
    
11. 
    
12. @Singleton
    
13. class A(object):
    
14.     a = 1
    
15. 
    
16.     def __init__(self, x=0):
    
17.         self.x = x
    
18. 
    
19. 
    
20. a1 = A(2)
    
21. a2 = A(3)

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二、web自动化driver实现单例模式
2.1 编写单例模式的装饰器

singleton.py

1. #coding:utf-8
   
2. #单例模式函数，用来修饰类
   
3. def singleton(cls,*args,**kw):
   
4.     instances = {}
   
5.     def _singleton():
   
6.         if cls not in instances:
   
7.             instances[cls] = cls(*args,**kw)
   
8.         return instances[cls]
   
9.     return _singleton

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2.2 driver 使用装饰器，实现单例模式GetSeleniumDriver.py

1. # -*- coding:utf-8 -*-
   
2. from selenium import webdriver
   
3. from singleton import singleton
   
4. @singleton
   
5. class GetSeleniumDriver(object):
   
6.     def __init__(self):
   
7.         self.driver = webdriver.Chrome()

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2.3 获取driver的实例，就是单例了

1. 
   
2. class My_task(RES):
   
3.     def __init__(self):
   
4.         self.driver=GetSeleniumDriver().driver
   
5. 
   
6.     def Making_task_Button(self):
   
7.         Making_task_Button=self.driver.find_element_by_xpath(RES.Making_task_Button_xpth)
   
8.         return Making_task_Button
   
9. 
   
10.     def Audit_task_Button(self):
    
11.         Audit_task_Button=self.driver.find_element_by_xpath(RES.Audit_task_Button_xpth)
    
12.         return Audit_task_Button

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三、在自动化项目中具体的应用
3.1项目结构

一、工具层 Utils

1  singleton.py 是单例装饰器

1. #coding:utf-8
   
2. #单例模式函数，用来修饰类
   
3. def singleton(cls,*args,**kw):
   
4.     instances = {}
   
5.     def _singleton():
   
6.         if cls not in instances:
   
7.             instances[cls] = cls(*args,**kw)
   
8.         return instances[cls]
   
9.     return _singleton

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2 GetSeleniumDriver.py  driver实现单例

1. # -*- coding:utf-8 -*-
   
2. from selenium import webdriver
   
3. from Utils.singleton import singleton
   
4. @singleton
   
5. class GetSeleniumDriver(object):
   
6.     def __init__(self):
   
7.         self.driver = webdriver.Chrome()

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二、页面元素层 TsetSharelab

My_task.py

1. # -*- coding:utf-8 -*-
   
2. 
   
3. from Utils.GetSeleniumDriver import GetSeleniumDriver
   
4. 
   
5. 
   
6. class My_task():
   
7.     def __init__(self):
   
8.         self.driver=GetSeleniumDriver().driver
   
9. 
   
10.     def Making_task_Button(self):
    
11.         Making_task_Button=self.driver.find_element_by_xpath('/html/body/div[3]/div[1]/div/a[1]')
    
12.         return Making_task_Button
    
13. 
    
14.     def Audit_task_Button(self):
    
15.         Audit_task_Button=self.driver.find_element_by_xpath('/html/body/div[3]/div[1]/div/a[1]')
    
16.         return Audit_task_Button

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三、流程层

把一步一步的动作，封装成一个业务流程

BookCity_page_process.py

1. # -*- coding:utf-8 -*-
   
2. from Utils.GetSeleniumDriver import GetSeleniumDriver
   
3. 
   
4. import time
   
5. 
   
6. class BookCity_page_process(object):
   
7.     def __init__(self):
   
8.         self.driver=GetSeleniumDriver().driver
   
9. 
   
10.     def WeiBo_Loain_To_Share(self):  
    
11.         time.sleep(3)
    
12.         self.driver.find_elements_by_class_name('W_input').pop(0).send_keys(123)
    
13.         time.sleep(1)
    
14.         self.driver.find_elements_by_class_name('W_input').pop(1).send_keys(456)

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四、case层 ，把业务逻辑组成一条条用例

test_case.py

1. #coding:utf-8
   
2. from time import sleep
   
3. from Utils.GetSeleniumDriver import GetSeleniumDriver
   
4. 
   
5. class CreativeBooks(unittest.TestCase):
   
6.     @classmethod
   
7.     def setUpClass(self):
   
8.         self.driver = GetSeleniumDriver().driver
   
9.         sleep(2)
   
10.     @classmethod
    
11.     def tearDownClass(self):
    
12.         pass
    
13. 
    
14.     def setUp(self):
    
15.         self.driver = GetSeleniumDriver().driver
    
16.         self.driver.get("http://t.com/")
    
17.         self.driver.maximize_window()
    
18.         sleep(1)
    
19.         Creative_books().Creative_books_Button().click()
    
20. 
    
21.     def tearDown(self):
    
22.         self.driver.delete_all_cookies()
    
23.     def testa(self):
    
24. 
    
25.         #新建图书
    
26.         Creative_books().CreatBook_Button().click()
    
27.         #输入书名
    
28.         Creative_books().Input_book_name().send_keys(u"A1一")
    
29.         #保存书名
    
30. 
    
31.     def testb(self):
    
32.         first = self.driver.current_window_handle
    
33.         Creative_books().Help_center_Button().click()

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