Test and Behavior Driven Development with Python. Lorena Lobato Pardavila, IT-CM-LCS 2nd Forum CERN, 31 st May 2016

Transcription

1 Test and Behavior Driven Development with Python Lorena Lobato Pardavila, IT-CM-LCS CERN, 31 st May

2 What I am going to talk? What do you know about testing? What is Test-Driven Development? Is Behaviour-Driven Development the same? Unit Testing tools: Behave and Selenium Web Driver What do we take from this talk? 2 2

3 What do you know about Testing? White-Box Testing Black-Box Testing Unittest Integration testing Acceptance Testing TDD vs BDD Focus on the activities. You know the source of the program Focus in the result. You have no idea how the program should work Single piece of code to be tested Multiple pieces are tested together Automatic testing of the entire application Agile Software Development techniques 3 3

4 What is Test-Driven Development? 4 4

5 Test-Driven Development (TDD) Add test Does the test fail? Write the code Refactor Run tests 5 5

6 Is Behaviour-Driven Development the same? 6 6

7 Behaviour-Driven Development (BDD) Write a Failing Acceptance Test Write a Failing Unit Test Make the Test Pass Refactor BDD TDD 7 7

8 Behaviour-Driven Development (BDD) 8 8

9 UNIT TESTING TOOLS 9 9

10 Behave BDD framework based on Python implementation of the Cucumber specification Behave uses tests written in a natural language style, backed up by Python code. BDD concepts: When, Given, Then 10 10

11 Behave: Environment Controls 11 11

12 Behave: Write the feature test 12 12

13 Behave: Provide the Test Automation 13 13

14 Behave: Run your test 14 14

15 Behave example: DNS LB 15 15

16 Behave example: DNS LB 16 16

17 What if? 17 17

18 Selenium Web Driver Open source, web-based testing automation tool It aims to mimic the behaviour of a real user, and as such interacts with the HTML of the application. Muti-language backend support (Java, Ruby, Python, C#, PHP ) Supports Cross-Browser Testing. The tests can be run on multiple browsers

19 Selenium Web Driver 19 19

20 Selenium Web Driver Example: DNS LB from selenium import webdriver from selenium.webdriver.common.keys import Keys from selenium.webdriver.common.alert import Alert import unittest class NewvisitorTest(unittest.TestCase): def setup(self): self.browser = webdriver.firefox() self.browser.implicitly_wait(3) def teardown(self): self.browser.quit() pass def test_sso_login(self): self.browser.get(" self.assertin('dns Load Balancing', self.browser.title) link = self.browser.find_element_by_link_text('cern SSO Login').click() self.assertin('cern Authentication', self.browser.title) link = self.browser.find_element_by_link_text('sign in using your current Windows/Kerberos credentials').click() page_text = self.browser.find_element_by_tag_name('body').text self.assertin('logged in', page_text) inputbox = self.browser.find_element_by_id('id_new_alias') inputbox.send_keys( hola-developers!') inputbox.send_keys(keys.enter)... if name == ' main ': unittest.main() 20

21 From this talk.. Unit Testing gives you the what. Test-Driven Development gives you the when. Behavior Driven- Development gives you the how. Run tests often by integrating these tools with CI systems. Behave is great to have the code documented and to know in advance the requirements Selenium Web Driver for lazy people 21 21

22 I like it! Where can I start from? Unit testing Python framework General rules Python testing Behave Selenium Web Driver Test-Driven Development with Python

23 Questions? THANKS FOR YOUR ATTENTION! CONTACT Work: tcsc 2016: "Efficient and 23

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