[modelica] Add integration smoke test

pmd-dist/src/test/java/net/sourceforge/pmd/it/AllRulesIT.java

@@ -22,7 +22,8 @@ public class AllRulesIT extends AbstractBinaryDistributionTest {
     @Parameters
     public static Iterable<String> languagesToTest() {
         // note: scala and wsdl have no rules
-        return Arrays.asList("java", "apex", "javascript", "jsp", "plsql", "pom", "visualforce", "velocitytemplate", "xml", "xsl");
+        return Arrays.asList("java", "apex", "javascript", "jsp", "modelica",
+                "plsql", "pom", "visualforce", "velocitytemplate", "xml", "xsl");
     }
 
     @Test

pmd-dist/src/test/resources/rulesets/all-modelica.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+
+<ruleset name="All Modelica Rules" 
+    xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 https://pmd.sourceforge.io/ruleset_2_0_0.xsd">
+    <description>Every Modelica Rule in PMD</description>
+
+    <rule ref="category/modelica/bestpractices.xml" />
+<!--     <rule ref="category/modelica/codestyle.xml" /> -->
+<!--     <rule ref="category/modelica/design.xml" /> -->
+<!--     <rule ref="category/modelica/documentation.xml" /> -->
+<!--     <rule ref="category/modelica/errorprone.xml" /> -->
+<!--     <rule ref="category/modelica/multithreading.xml" /> -->
+<!--     <rule ref="category/modelica/performance.xml" /> -->
+<!--     <rule ref="category/modelica/security.xml" /> -->
+
+</ruleset>

pmd-dist/src/test/resources/sample-source/modelica/SampleCode.mo

@@ -0,0 +1,17 @@
+package Test
+  package Inc
+    model X
+    end X;
+    model Y
+    end Y;
+  end Inc;
+  model A
+    model Y
+    end Y;
+  end A;
+  model B
+    extends A;
+    import Inc.*;
+    X x;
+  end B;
+end OtherName;