Architecture Fitness Test example

ArchitectureFitnessTest.java

package platform.medium.example.architecture;

import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.noClasses;
import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.noMethods;
import static com.tngtech.archunit.library.dependencies.SlicesRuleDefinition.slices;

import com.tngtech.archunit.core.domain.JavaClasses;
import com.tngtech.archunit.core.importer.ImportOption.DoNotIncludeTests;
import com.tngtech.archunit.junit.AnalyzeClasses;
import com.tngtech.archunit.junit.ArchTest;

@AnalyzeClasses(packages = "platform.medium.example", importOptions = DoNotIncludeTests.class)
class ArchitectureFitnessTest {

  @ArchTest
  static void applicationDoesNotHaveCyclicDependencies(JavaClasses classes) {
    slices().matching("..example.(*)..").should().beFreeOfCycles().check(classes);
  }

  @ArchTest
  static void domainDoesNotImportFromAdapterPackage(JavaClasses classes) {
    noClasses()
        .that()
        .resideInAPackage("..domain..")
        .should()
        .dependOnClassesThat()
        .resideInAPackage("..adapters..")
        .check(classes);
  }

  @ArchTest
  static void domainDoesNotImportFromAwsPackages(JavaClasses classes) {
    noClasses()
        .that()
        .resideInAPackage("..domain..")
        .should()
        .dependOnClassesThat()
        .resideInAnyPackage("..amazonaws..", "..aws..")
        .check(classes);
  }

  @ArchTest
  static void oneAdapterShouldNotDependOnAnother(JavaClasses classes) {
    slices()
        .matching("..adapters.(**)")
        .should()
        .notDependOnEachOther()
        .check(classes);
  }

  @ArchTest
  static void shouldUseImmutableModelClasses(JavaClasses classes) {
    noMethods()
        .should()
        .haveNameMatching("set.*")
        .check(classes);
  }
}