Testing our projects

Gradle has a built-in support for running tests for our Java projects. When we add the Java plugin to our project, we will get new tasks to compile and run tests. We will also get the testCompile and testRuntime dependency configurations. We use these dependencies to set the class path for running the tests in our code base:

1. Let's write a simple JUnit test for a sample Java class. The implementation of gradle.sample.Sample has the getWelcomeMessage() method, where we read a text from the file property and then return the value. The following example contains the code for the Sample class:

           // File: src/main/java/gradle/sample/Sample.java 
           package gradle.sample; 
    
           import java.util.ResourceBundle; 
    
           /** 
           * Read welcome message from external properties file 
           * <code>messages.properties</code>. 
           */ 
   

2. Next, we must add the resource property file that is used by the Sample class. We will create the messages...