Page object and data driven test

Data driven testing

That is to split the test data from the test script according to the business logic , Make it an independent variable parameter , Realize the purpose of highly reusing test scripts under different data sets .

ddt library

python Medium ddt Library technology parameterizes the variables in the test , It contains a set of classes and methods for data-driven testing .

pip install ddt

Make the previous example of Taobao login data-driven

import unittest
from ddt import ddt, data, unpack
from selenium import webdriver
from selenium.webdriver.common.by import By

@ddt
class HomePageTest(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        # create a new Firefox session
        cls.driver = webdriver.Chrome()
        cls.driver.implicitly_wait(30)
        cls.driver.maximize_window()
        # navigate to the application home page
        cls.driver.get("https://www.taobao.com/")
	@data(("login_id1", "pwd1"),("login_id2". "pwd2"))
	@unpack
    def test_register_new_user(self, login_id, pwd): #  Parameter declarations 
        driver=self.driver
        driver.find_element(By.LINK_TEXT, " Pro - , Please log in ").click()  #  Click on the simulation 
        login_user = driver.find_element(By.ID, "fm-login-id")
        login_password=driver.find_element(By.ID, "fm-login-password")  #  Locate the password box page element 
        # self.assertEqual("40", login_password.get_attribute("maxlength")) #  Verify the maximum length of the password input box 

        #  Check if an element is visible and usable 
        # self.assertTrue(login_password.is_displayed())
        # self.assertTrue(login_password.is_enabled())

        #  Simulate user input and login , Be careful ： In many cases, there will be slider and verification code verification 
        login_user.send_keys(login_id) #  Login account parameter transfer 
        login_password.send_keys(pwd) #  Login password transfer parameter 
        login_button=driver.find_element(By.LINK_TEXT, " Sign in ")
        login_button.click()

Data driven through external files

1. adopt csv File incoming data

import csv  #  Import csv package 
import unittest
from ddt import ddt, data, unpack
from selenium import webdriver
from selenium.webdriver.common.by import By

def get_data(file_name):
	rows=[]
	data_file=open(file_name, "rb")
	reader=csv.reader(data_file)
	next(reader,None) #  skip csv Header 
	for row in reader:
		rows.append(row)
	return rows

@ddt
class HomePageTest(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        # create a new Firefox session
        cls.driver = webdriver.Chrome()
        cls.driver.implicitly_wait(30)
        cls.driver.maximize_window()
        # navigate to the application home page
        cls.driver.get("https://www.taobao.com/")
	@data(*get_data("testdata.csv"))
	@unpack
    def test_register_new_user(self, login_id, pwd): #  Parameter declarations 
        driver=self.driver
        driver.find_element(By.LINK_TEXT, " Pro - , Please log in ").click()  #  Click on the simulation 
        login_user = driver.find_element(By.ID, "fm-login-id")
        login_password=driver.find_element(By.ID, "fm-login-password")  #  Locate the password box page element 
        # self.assertEqual("40", login_password.get_attribute("maxlength")) #  Verify the maximum length of the password input box 

        #  Check if an element is visible and usable 
        # self.assertTrue(login_password.is_displayed())
        # self.assertTrue(login_password.is_enabled())

        #  Simulate user input and login , Be careful ： In many cases, there will be slider and verification code verification 
        login_user.send_keys(login_id) #  Login account parameter transfer 
        login_password.send_keys(pwd) #  Login password transfer parameter 
        login_button=driver.find_element(By.LINK_TEXT, " Sign in ")
        login_button.click()

2. adopt excel File incoming data

xlrd： read Excel library
xlwd： Write Excel library
openpyxl： Provides Excel Read write function

import csv  #  Import csv package 
import unittest
from ddt import ddt, data, unpack
from selenium import webdriver
from selenium.webdriver.common.by import By

def get_data(file_name):
	rows=[]
	book=xlrd.open_workbook(file_name)
	sheet=book.sheet_by_index(0)
	for row_idx in range(1, sheet.nrows):
		rows.append(likst(sheet.row_values(row_idx,0,sheet.ncols)))
	return rows

@ddt
class HomePageTest(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        # create a new Firefox session
        cls.driver = webdriver.Chrome()
        cls.driver.implicitly_wait(30)
        cls.driver.maximize_window()
        # navigate to the application home page
        cls.driver.get("https://www.taobao.com/")
	@data(*get_data("testdata.xlsx"))
	@unpack
    def test_register_new_user(self, login_id, pwd): #  Parameter declarations 
        driver=self.driver
        driver.find_element(By.LINK_TEXT, " Pro - , Please log in ").click()  #  Click on the simulation 
        login_user = driver.find_element(By.ID, "fm-login-id")
        login_password=driver.find_element(By.ID, "fm-login-password")  #  Locate the password box page element 
        # self.assertEqual("40", login_password.get_attribute("maxlength")) #  Verify the maximum length of the password input box 

        #  Check if an element is visible and usable 
        # self.assertTrue(login_password.is_displayed())
        # self.assertTrue(login_password.is_enabled())

        #  Simulate user input and login , Be careful ： In many cases, there will be slider and verification code verification 
        login_user.send_keys(login_id) #  Login account parameter transfer 
        login_password.send_keys(pwd) #  Login password transfer parameter 
        login_button=driver.find_element(By.LINK_TEXT, " Sign in ")
        login_button.click()

page Object Pattern

When designing tests , Abstract the elements and methods according to the page , To separate into certain objects , And then organize .
That is, create an object to correspond to an application of the page .
Advantages as follows ：

• Abstract objects , You can minimize the impact of modifying the page code on the test .
• You can reuse part of the test code in multiple test cases .
• Test code becomes more readable 、 flexible 、 Maintainable .