Starting with IntelliJ and Gradle : how to do jUnit tests? - gradle

Good evening,
because I want to initiate myself to LibGDX, I recently gave a try to IntelliJ Idea IDE and Gradle instead of my old Eclipse-Maven habits.
I have to recognize that such a change is not easy because I really don't find anything.
To start learning I created a project with a simple Pojo and also a unit test class.
I have no error in the editor, both Pojo and jUnit seem OK, but when I launch the unit test, I get such errors :
Can someone help me understand what's going wrong ?
EDIT : build.gradle file content :
plugins {
id 'java'
}
group 'com.citizenweb.training'
version '1.0-SNAPSHOT'
repositories {
mavenCentral()
}
dependencies {
testCompile group: 'junit', name: 'junit', version: '4.12'
// https://mvnrepository.com/artifact/org.projectlombok/lombok
compile group: 'org.projectlombok', name: 'lombok', version: '1.18.16'
}
Thanx by advance.

It seems you did not configure lombok dependencies properly: your test classes cannot see lombok-generated stuff (getters, setters, build). Lombok is based on annotation processor so you need to declare following dependencies in your build.gradle :
ext {
lombokVersion = "1.18.6"
}
dependencies {
// Lombok
compileOnly ("org.projectlombok:lombok:${lombokVersion}")
annotationProcessor ("org.projectlombok:lombok:${lombokVersion}")
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testCompileOnly ("org.projectlombok:lombok:${lombokVersion}")
testAnnotationProcessor ("org.projectlombok:lombok:${lombokVersion}")
testImplementation("junit:junit:4.12")
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