Add test for #285 and partially fix it

resources/bytecode/javFiles/Bug285.jav

@@ -0,0 +1,15 @@
+import java.util.Optional;
+import java.lang.Integer;
+
+class StaticClass {
+    static StaticClass barbar() {
+        return new StaticClass();
+    }
+}
+
+public class Bug285 {
+    void foo() {
+        Optional<Integer> opt = Optional.empty();
+        StaticClass b = StaticClass.barbar();
+    }
+}

src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java

@@ -13,6 +13,7 @@ import de.dhbwstuttgart.core.JavaTXCompiler;
 import de.dhbwstuttgart.syntaxtree.*;
 import de.dhbwstuttgart.syntaxtree.statement.*;
 import de.dhbwstuttgart.syntaxtree.type.Void;
+import de.dhbwstuttgart.target.tree.expression.TargetClassName;
 import org.antlr.v4.runtime.Token;
 
 import de.dhbwstuttgart.exceptions.NotImplementedException;
@@ -772,7 +773,8 @@ public class StatementGenerator {
                 // gleiche TPH bekommen
                 var field = fields.get(expression);
                 return new FieldVar(new This(offset), Modifier.isStatic(field.modifiers()), expression, fields.get(expression).type(), offset);
-
+            } else if (reg.contains(expression)) {
+                return new StaticClassName(reg.getName(expression), offset);
             } else {
                 // lokale Variable wurde ohne "var"-Keyword deklariert und direkt mit Wert versehen
                 localVars.put(expression, TypePlaceholder.fresh(offset));

src/test/java/TestComplete.java

@@ -876,4 +876,11 @@ public class TestComplete {
         var clazz = classFiles.get("Bug112");
         var instance = clazz.getDeclaredConstructor().newInstance();
     }
+
+    @Test
+    public void testBug285() throws Exception {
+        var classFiles = generateClassFiles(new ByteArrayClassLoader(), "Bug285.jav");
+        var clazz = classFiles.get("Bug285");
+        var instance = clazz.getDeclaredConstructor().newInstance();
+    }
 }