Added failing integration test for 'layeredArchitecture()...ignoreDep…

…endency(..)'

archunit-example/src/test/java/com/tngtech/archunit/exampletest/junit/LayeredArchitectureTest.java

@@ -1,5 +1,7 @@
 package com.tngtech.archunit.exampletest.junit;
 
+import com.tngtech.archunit.example.SomeMediator;
+import com.tngtech.archunit.example.service.ServiceViolatingLayerRules;
 import com.tngtech.archunit.exampletest.Example;
 import com.tngtech.archunit.junit.AnalyzeClasses;
 import com.tngtech.archunit.junit.ArchTest;
@@ -24,4 +26,17 @@ public class LayeredArchitectureTest {
             .whereLayer("Controllers").mayNotBeAccessedByAnyLayer()
             .whereLayer("Services").mayOnlyBeAccessedByLayers("Controllers")
             .whereLayer("Persistence").mayOnlyBeAccessedByLayers("Services");
+
+    @ArchTest
+    public static final ArchRule layer_dependencies_are_respected_with_exception = 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")
+
+            .ignoreDependency(SomeMediator.class, ServiceViolatingLayerRules.class);
 }

archunit-integration-test/src/test/java/com/tngtech/archunit/integration/junit/LayeredArchitectureIntegrationTest.java

@@ -23,12 +23,29 @@
 @RunWith(ArchUnitIntegrationTestRunner.class)
 @AnalyzeClasses(packages = "com.tngtech.archunit.example")
 public class LayeredArchitectureIntegrationTest {
+
     @ArchTest
     @ExpectedViolationFrom(location = LayeredArchitectureIntegrationTest.class, method = "expectLayerViolations")
-    public static final ArchRule layer_dependencies_are_respected = LayeredArchitectureTest.layer_dependencies_are_respected;
+    public static final ArchRule layer_dependencies_are_respected =
+            LayeredArchitectureTest.layer_dependencies_are_respected;
+
+    @ArchTest
+    @ExpectedViolationFrom(location = LayeredArchitectureIntegrationTest.class, method = "expectLayerViolationsWithException")
+    public static final ArchRule layer_dependencies_are_respected_with_exception =
+            LayeredArchitectureTest.layer_dependencies_are_respected_with_exception;
 
     @CalledByArchUnitIntegrationTestRunner
     static void expectLayerViolations(ExpectsViolations expectsViolations) {
+        expectLayerViolationsWithException(expectsViolations);
+        expectsViolations
+                .by(callFrom(SomeMediator.class, "violateLayerRulesIndirectly")
+                        .toMethod(ServiceViolatingLayerRules.class, "doSomething")
+                        .inLine(15)
+                        .asDependency());
+    }
+
+    @CalledByArchUnitIntegrationTestRunner
+    static void expectLayerViolationsWithException(ExpectsViolations expectsViolations) {
         expectsViolations.ofRule("Layered architecture consisting of" + lineSeparator() +
                 "layer 'Controllers' ('com.tngtech.archunit.example.controller..')" + lineSeparator() +
                 "layer 'Services' ('com.tngtech.archunit.example.service..')" + lineSeparator() +
@@ -45,11 +62,6 @@ static void expectLayerViolations(ExpectsViolations expectsViolations) {
                         .inLine(14)
                         .asDependency())
 
-                .by(callFrom(SomeMediator.class, "violateLayerRulesIndirectly")
-                        .toMethod(ServiceViolatingLayerRules.class, "doSomething")
-                        .inLine(15)
-                        .asDependency())
-
                 .by(callFrom(ServiceViolatingLayerRules.class, "illegalAccessToController")
                         .toConstructor(UseCaseTwoController.class)
                         .inLine(12)

archunit/src/main/java/com/tngtech/archunit/library/Architectures.java

@@ -161,6 +161,10 @@ public LayeredArchitecture as(String newDescription) {
             return new LayeredArchitecture(layerDefinitions, dependencySpecifications, Optional.of(newDescription));
         }
 
+        public LayeredArchitecture ignoreDependency(Class<?> from, Class<?> to) {
+            return this;
+        }
+
         private String[] toArray(Set<String> strings) {
             return strings.toArray(new String[strings.size()]);
         }