LayeredArchitectureTest.java

package com.tngtech.archunit.exampletest.junit;

import com.tngtech.archunit.junit.AnalyzeClasses;
import com.tngtech.archunit.junit.ArchIgnore;
import com.tngtech.archunit.junit.ArchTest;
import com.tngtech.archunit.junit.ArchUnitRunner;
import com.tngtech.archunit.lang.ArchRule;
import org.junit.runner.RunWith;

import static com.tngtech.archunit.library.Architectures.layeredArchitecture;

@RunWith(ArchUnitRunner.class)
@AnalyzeClasses(packages = "com.tngtech.archunit.example")
public class LayeredArchitectureTest {
    @ArchTest
    @ArchIgnore
    public static final ArchRule layer_dependencies_are_respected = layeredArchitecture()

            .layer("Controllers").definedBy("com.tngtech.archunit.example.controller..")
            .layer("Services").definedBy("com.tngtech.archunit.example.service..")
            .layer("Persistence").definedBy("com.tngtech.archunit.example.persistence..")

            .whereLayer("Controllers").mayNotBeAccessedByAnyLayer()
            .whereLayer("Services").mayOnlyBeAccessedByLayers("Controllers")
            .whereLayer("Persistence").mayOnlyBeAccessedByLayers("Services");
}