Layered Architecture Test

layeredTest.java

private final JavaClasses classes = new ClassFileImporter().importPackages("com.tngtech.archunit.example.layers");

@Test
public void layer_dependencies_are_respected() {
    layeredArchitecture()

            .layer("Controllers").definedBy("..controller..")
            .layer("Services").definedBy("..layers.service..")
            .layer("Persistence").definedBy("..layers.persistence..")

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

            .check(classes);
}