GH-317 - Detect violations from types located in root packages.

We now create artificial root application modules for all root packages to detect violations (for example, types located in root packages referring to module-internal types).

spring-modulith-integration-test/src/main/java/com/acme/myproject/CentralConfiguration.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.acme.myproject;
+
+import org.springframework.stereotype.Component;
+
+import com.acme.myproject.moduleB.internal.InternalComponentB;
+
+/**
+ *
+ * @author Oliver Drotbohm
+ */
+@Component
+class CentralConfiguration {
+	private InternalComponentB referenceToModuleInternalComponent;
+}