Extend test coverage

Author: jjohannes

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

@@ -26,6 +26,7 @@
 
 import javax.inject.Inject;
 import java.io.File;
+import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.HashMap;
 import java.util.Map;
@@ -77,7 +78,8 @@ public ModuleInfo put(File projectRoot, String moduleInfoPath, String artifact,
         if (maybePutModuleInfo(folder, providers)) {
             ModuleInfo thisModuleInfo = moduleInfo.get(folder);
             moduleNameToProjectPath.put(thisModuleInfo.getModuleName(), ":" + artifact);
-            String capabilitySuffix = sourceSetToCapabilitySuffix(Paths.get(moduleInfoPath).getParent().getFileName().toString());
+            Path parentDirectory = Paths.get(moduleInfoPath).getParent();
+            String capabilitySuffix = parentDirectory == null ? null : sourceSetToCapabilitySuffix(parentDirectory.getFileName().toString());
             if (capabilitySuffix != null) {
                 if (group.isPresent()) {
                     moduleNameToCapability.put(thisModuleInfo.getModuleName(), group.get() + ":" + artifact + "-" + capabilitySuffix);

src/test/groovy/org/gradlex/javamodule/dependencies/test/initialization/SettingsPluginTest.groovy

@@ -24,7 +24,10 @@ class SettingsPluginTest extends Specification {
         settingsFile << '''
             javaModules {
                 module("app") { plugin("application") }
-                module("lib") { plugin("java-library") }
+                module("lib") {
+                    plugin("java-library")
+                    artifact = "lib-x"
+                }
             }
         '''
         libModuleInfoFile << 'module abc.lib { }'
@@ -39,7 +42,7 @@ class SettingsPluginTest extends Specification {
 
         then:
         result.task(":app:compileJava").outcome == SUCCESS
-        result.task(":lib:compileJava").outcome == SUCCESS
+        result.task(":lib-x:compileJava").outcome == SUCCESS
     }
 
     def "finds all modules in a directory"() {
@@ -135,4 +138,31 @@ class SettingsPluginTest extends Specification {
         result.task(":compileJava").outcome == NO_SOURCE
     }
 
+    def 'can have module-info in custom location'() {
+        given:
+        settingsFile << '''
+            javaModules {
+                module("app") { plugin("application") }
+                module("lib") {
+                    plugin("java-library")
+                    moduleInfoPaths.add("src")
+                }
+            }
+        '''
+        libBuildFile << 'sourceSets.main { java.setSrcDirs(listOf("src")) }'
+        file("lib/src/module-info.java") << 'module abc.lib { }'
+        appModuleInfoFile << '''
+            module org.gradlex.test.app {
+                requires abc.lib;
+            }
+        '''
+
+        when:
+        def result = runner(':app:compileJava').build()
+
+        then:
+        result.task(":app:compileJava").outcome == SUCCESS
+        result.task(":lib:compileJava").outcome == SUCCESS
+    }
+
 }