Unit Test With Mockito

This talk was presented at the Blrdroid Women's day meet-up 10th March 2018.
I covered "Unit Test with Mockito". I have mention GitHub link (https://github.com/vrushaliraut/MvpMockitoWeatherApp) for repository which i have presented with this slides.
In repository I have created some examples with - Mockito Unit test cases.

Transcript

1. Unit Testing With Mockito Vrushali Raut
 Android Developer @Gojek

2. Testing Framework • Why do we need Testing Framework ?
3. Testing Framework • How do you test it? • Manually test an application • Automate your app
4. Junit Testing • What is Junit?
5. Junit Testing • Why do we need Junit? • How to build Junit Test case?
6. Junit Testing • Simple Calculator example
7. Junit Testing • Limitations of JUnit
8. Limitations of Junit • Example :- CalculatorService
9. Mocking framework • JMock • EasyMock • Mockito
10. Why Mockito • Why Mockito? • Why not other Mocking Framework?
11. What is Mockito • What is Mockito? • Open source Testing framework • Creation of Mock object in Automated unit test
12. Mockito - Basics • Add Mockito dependency
13. Mockito - Basics • Create stub • Use Mock Service • Use When…thenReturn of Mockito • Annotation’s • @Mock • @Rule
14. Test Doubles • Test double is an object that can stand in for the real object in a test
15. Test Doubles • How Stunt doubles stands in for an actor in a movie
16. Test Doubles
17. • Stubs • Mocks • Fakes Common Types
18. Stubs • Has no logic - Return What you tell • Can be used - when you need an object, 
 to return a specific values in order to get your code under test into a certain condition
19. Stubs • Stub object have query type method • When…thenReturn()
20. Stubs Example -
21. Mocks • A Mock has expectations about the call
 • Used to test interaction between objects
22. Mocks • Useful in cases - • No visible state changes or Return result that you can verify
23. Mocks Example • Mock object have command type method • sendEmail • Disk Read
24. Mocks Example
25. Fakes • Fake doesn’t use mocking framework • Lightweight implementation of API • Behaves like real implementation • an in-memory database
26. Fakes - When to use • When you can’t use a real implementation in your test • If real implementation is too slow or talks over the Network
27. Fakes Example • User does not have access to authenticationService
28. Mockito - Basic Example • Stub • Mock Service • Use When…thenReturn of Mockito • Annotation’s • @Mock • @Rule
29. Mockito Annotation • @Mock • @Spy • @Captor • @InjectMocks
30. Enable Annotations • Annotate the JUnit test with a runner - • MockitoJUnitRunner. • Programmatically
31. Mockito Annotation • @Mock • Does so class of an Type, Not from actual instance • @Spy • Wrap the existing instance
32. Mockito Annotation • @Captor • @InjectMocks
33. Mockito Annotation • @Captor • Captures argument values for assertions • Example -
34. Mockito Annotation • @InjectMocks • Inject and Mock same time • Example -
35. Use of Annotations • To minimize repetitive mock creation • To make test more readable
36. Argument Matchers • Mockito verifies argument values in Java style. • equals() • Allows flexible verification or stubbing
37. Argument Matchers • Mockito Argument Matcher • any • argThat • eq • same • Argumentcaptor.captor()
38. Retrofit API call test
39. GitHub Reference • In this Github Repository I have write down some examples of mockito test cases • https://github.com/vrushaliraut/ MvpMockitoWeatherApp
40. Reference :- • https://static.javadoc.io/org.mockito/mockito-core/2.15.0/org/mockito/Mockito.html • https://blog.pragmatists.com/test-doubles-fakes-mocks-and-stubs-1a7491dfa3da • https://www.youtube.com/watch?v=eILy4p99ac8 • http://www.baeldung.com/mockito-spy • https://testing.googleblog.com/2013/07/testing-on-toilet-know-your-test- doubles.html • http://www.baeldung.com/mockito-annotations • https://stackoverflow.com/questions/22822512/how-do-mockito-matchers-work
41. Thank You