1. Automation
Test
余昭辉
2011.10

2. I’m a…
 Developer(C#, Java, Scala…)
 Blogger(http://yuyijq.cnblogs.com)
 Microsoft MVP(C#)
I like…
 CLR, JVM
 OO, Design Pattern, Clean Code
 Agile(TDD, Code Review, Pair
Programming, etc)

3. Tools

4. jUnit
 Test Fixture
 BeforeClass, AfterClass, Before, After,
assumeThat, Group Tests
 Extensions
 DbUnit, jsonAssert
 Hamcres
 Matchers
 More expression
 Friendly assert result

5. Mock
 Mockito
 jMock
 easyMock
 MockObjects

6. Spring test
 MockHttpServletRequest
 MockHttpServletResponse
 MockHttpSession
 MockServletConfig
 MockServletContext
 …
 ModelAndViewAssert

7. Selenium + WebDriver
 driver.get(“http://www.qunar.com”)
 driver.findElement(By.id(“login”)).click();
 …

8. BDD(Cucumber)
 How to manage test cases?
 The relation between test cases and test
code.
 QA and Dev

9. Principles

10. Test is a feedback
mechanism
 Run fast
 Run after each modified
 Run before check-in
 …

11. Test triangle
Functional Tests
Integration Tests
Unit Tests

12. State-based assert over
behavior-based assert
 assertThat(service.findById(1),is(expected))
 verify(service,times(1)).findById(1);

13. assertThat over assertXxx
 Self description
 Different parameter type

14. Test behavior, not methods
 One behavior, one test
 Not one method many tests
 One test one assert(*)

15. Test method name is
important
 Test method is document
 Give your intent:
 testFindById is not a good name
 should_find_agent_by_id is better
 TestDox rule

16. Test data builder
 Agent agent = new AgentBuilder().build();

17. Repeat run
 Don’t modified database, transaction
 Prepare data itself, or write fixture

18. Test code is as important as
product code
 We should extract duplicate code to method
 We should use good names
 …

19. Add test at:
 If you want to add println to get debug info
 If you find a bug, write a test first

20. Test as singal
 It’s very difficult to test
 Three steps:
 Given
 When
 Then
 Test private methods

21. Demo

22. Remember
 Automated test can’t avoid bugs
 Even it can’t help you find bugs
 But it can avoid introduce bugs
 But…

23. Thank you