Fix in module name calculation for additional source sets

Author: jjohannes

src/main/java/org/gradlex/javamodule/dependencies/JavaModuleDependenciesPlugin.java

@@ -267,11 +267,13 @@ private void declareDependency(String moduleName, @Nullable String ownModuleName
             projectDependency.because(moduleName);
         } else if (existingProjectName.isPresent()) {
             // no exact match -> add capability to point at Module in other source set
+            String projectName = existingProjectName.get();
             ProjectDependency projectDependency = (ProjectDependency) project.getDependencies().add(
-                    configuration.getName(), project.project(parentPath + ":" + existingProjectName.get()));
+                    configuration.getName(), project.project(parentPath + ":" + projectName));
             assert projectDependency != null;
+            String capabilityName = projectName + moduleNameSuffix.substring(projectName.length()).replace(".", "-");
             projectDependency.capabilities(c -> c.requireCapabilities(
-                    allProjectNamesAndGroups.get(existingProjectName.get()) + ":" + moduleNameSuffix.replace(".", "-")));
+                    allProjectNamesAndGroups.get(projectName) + ":" + capabilityName));
             projectDependency.because(moduleName);
         } else if (gav.isPresent()) {
             project.getDependencies().addProvider(configuration.getName(), gav, d -> d.because(moduleName));

src/main/java/org/gradlex/javamodule/dependencies/internal/utils/ModuleInfo.java

@@ -91,6 +91,9 @@ public String moduleNamePrefix(String projectName, String sourceSetName) {
         if (moduleName.endsWith("." + projectPlusSourceSetName)) {
             return moduleName.substring(0, moduleName.length() - projectPlusSourceSetName.length() - 1);
         }
+        if (moduleName.equals(projectPlusSourceSetName)) {
+            return "";
+        }
         if (moduleName.endsWith("." + projectName)) {
             return moduleName.substring(0, moduleName.length() - projectName.length() - 1);
         }