Pro Java Clustering and Scalability: Building Real-Time Apps with Spring, Cassandra, Redis, WebSocket and RabbitMQ

© Jorge Acetozi 2017

Jorge Acetozi, Pro Java Clustering and Scalability, https://doi.org/10.1007/978-1-4842-2985-9_24

24. Unit Tests

Jorge Acetozi¹ 

(1)São Paulo / SP, Brazil

Unit tests provide fast feedback, but they test only an isolated unit of code (a method in a class, for example). In the chat application, I write unit tests using JUnit¹ along with Mockito² and Hamcrest.³

24.1 InstantMessageBuilderTest.java

The InstantMessageBuilderTest.java class tests the InstantMessageBuilder class, which implements a builder pattern⁴ to provide a chain of methods responsible for simplifying the creation of a new InstantMessage object.

public class InstantMessageBuilderTest {  private final String chatRoomId = "123";  private final String fromUser = "jorge_acetozi"; ...