Learn Java Unit Testing with Junit & Mockito in 30 Steps

You take 12 steps with JUnit and 18 steps with Mockito into unit testing proficiency.

Mocking with Mockito

• Step 01 : Set up an Eclipse Project with JUnit and Mockito frameworks. First Green Bar.

• Step 02 : Example to start understanding why we need mocks.

• Step 03 : What is a stub? Create an unit test using Stub? Disadvantages of Stubs.

• Step 04 : Your first Mockito code! Hurrah!!! Lets use Mockito to mock TodoService.

• Step 05 : Stubbing variations with Mockito. A few mockito examples mocking List class : Multiple return values, Argument Matchers and throwing exceptions.

• Step 06 : Introduction to BDD. Given When Then. BDD Mockito Syntax.

• Step 07 : How to verify calls on a mock? Verify how many times a method is called. We will add deleteTodo method to the TodoService.

• Step 08 : How to capture an argument which is passed to a mock?

• Step 09 : Hamcrest Matchers.

• Step 10 : Let's simplify things with Mockito Annotations. @Mock, @InjectMocks, @RunWith(MockitoJUnitRunner.class), @Captor

• Step 11 : JUnit Rules. Using MockitoJUnit.rule() instead of @RunWith(MockitoJUnitRunner.class).

• Step 12 : Real world Example with Spring

• Step 13 : What is a spy? How to spy with Mockito?

• Step 14 : Some Theory : Why does Mockito not allow stubbing final and private methods?

• Step 15 : Using PowerMock and Mockito to mock a Static Method.

• Step 16 : Using PowerMock and Mockito to invoke a private Method.

• Step 17 : Using PowerMock and Mockito to mock a constructor.

• Step 18 : Good Unit Tests.

JUnit Framework

• Step 01 : Need for Unit Testing

• Step 02 : Setting up your First JUnit

• Step 03 : First Successful JUnit. Green Bar and assertEquals

• Step 04 : Refactoring Your First JUnit Test

• Step 05 : Second JUnit Example assertTrue and assertFalse

• Step 06 : @Before @After

• Step 07 : @BeforeClass @AfterClass

• Step 08 : Comparing Arrays in JUnit Tests

• Step 09 : Testing Exceptions in JUnit Tests

• Step 10 : Testing Performance in JUnit Tests

• Step 11 : Parameterized Tests

• Step 12 : Organize JUnits into Suites