src/main/java/Main.java

@@ -120,6 +120,10 @@ public class Main {
     }
 
     public static void printAST(ASTNode node, int indent) {
+        if (node == null) {
+            System.out.println("null");
+            return;
+        }
         String indentString = " ".repeat(indent * 2);
         System.out.println(indentString + node.getClass().toString());
 

src/test/java/test/java/FailureTest.java

@@ -63,7 +63,7 @@ public class FailureTest {
         CharStream codeCharStream = null;
         try {
             codeCharStream = CharStreams.fromPath(Paths.get("src/main/test/resources/EmptyClassExample.java"));
-            Main.parsefile(codeCharStream);
+            Main.parseFile(codeCharStream);
         } catch (IOException e) {
             System.err.println("Error reading the file: " + e.getMessage());
         }

src/test/java/test/java/semantic/SemanticTest.java

@@ -1,6 +1,5 @@
 package semantic;
 
-
 import ast.*;
 import ast.expression.BinaryExpressionNode;
 import ast.expression.ExpressionNode;
@@ -20,11 +19,10 @@ import ast.type.EnumTypeNode;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import semantic.exeptions.AlreadyDeclearedException;
-
 import java.util.ArrayList;
 import java.util.List;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.*;
 
 public class SemanticTest {
 
@@ -34,10 +32,9 @@ public class SemanticTest {
     }
 
     @Test
-    public void alreadyDeclaredLocalFieldVar(){
+    public void alreadyDeclaredLocalFieldVar() {
-
         ProgramNode programNode = new ProgramNode();
-        List<ClassNode> classList = new ArrayList<ClassNode>();
+        List<ClassNode> classList = new ArrayList<>();
         AccessTypeNode accessTypeNode = new AccessTypeNode(EnumAccessTypeNode.PUBLIC);
         ClassNode classNode = new ClassNode(accessTypeNode, "testClass");
 
@@ -53,16 +50,14 @@ public class SemanticTest {
         ASTNode typedAst = SemanticAnalyzer.generateTast(programNode);
 
         assertEquals(1, SemanticAnalyzer.errors.size());
-        assertEquals(true, SemanticAnalyzer.errors.get(0) instanceof AlreadyDeclearedException);
+        assertInstanceOf(AlreadyDeclearedException.class, SemanticAnalyzer.errors.getFirst());
-        assertEquals(null, typedAst);
+        assertNull(typedAst);
-
     }
 
     @Test
-    public void shouldWorkWithNoError(){
+    public void shouldWorkWithNoError() {
-
         ProgramNode programNode = new ProgramNode();
-        List<ClassNode> classList = new ArrayList<ClassNode>();
+        List<ClassNode> classList = new ArrayList<>();
         AccessTypeNode accessTypeNode = new AccessTypeNode(EnumAccessTypeNode.PUBLIC);
         ClassNode classNode = new ClassNode(accessTypeNode, "testClass");
 
@@ -72,26 +67,7 @@ public class SemanticTest {
         MemberNode memberNode2 = new FieldNode(accessTypeNode, new BaseTypeNode(EnumTypeNode.INT), "testVar2");
         classNode.members.add(memberNode2);
 
-        List<ParameterNode> parameterNodeList = new ArrayList<ParameterNode>();
+        MemberNode memberNode3 = getMemberNode(accessTypeNode);
-        ParameterNode parameterNode1 = new ParameterNode(new BaseTypeNode(EnumTypeNode.INT), "param1");
-        parameterNodeList.add(parameterNode1);
-        ParameterListNode parameterListNode = new ParameterListNode(parameterNodeList);
-
-        List<StatementNode> statementNodeList = new ArrayList<StatementNode>();
-
-        ExpressionNode expressionNodeObjectVariableLeft = new IdentifierExpressionNode("this");
-        ExpressionNode expressionNodeObjectVariableRight = new IdentifierExpressionNode("objectVar");
-
-        ExpressionNode expressionNodeLeft = new BinaryExpressionNode(expressionNodeObjectVariableLeft, expressionNodeObjectVariableRight, ExpresssionOperator.DOT);
-
-        ExpressionNode expressionNodeRight = new LiteralNode(1);
-
-        BinaryExpressionNode expressionNode = new BinaryExpressionNode(expressionNodeLeft, expressionNodeRight, ExpresssionOperator.ASSIGNMENT);
-
-        StatementNode statementNode1 = new AssignmentStatementNode(expressionNode);
-        statementNodeList.add(statementNode1);
-
-        MemberNode memberNode3 = new MethodNode(accessTypeNode, new BaseTypeNode(EnumTypeNode.INT), "testVar2",parameterListNode, statementNodeList );
         classNode.members.add(memberNode3);
 
         classList.add(classNode);
@@ -101,7 +77,53 @@ public class SemanticTest {
 
         assertEquals(0, SemanticAnalyzer.errors.size());
         assertEquals(programNode, typedAst);
-
     }
 
+    /**
+ * This method is used to create a MemberNode representing a method.
+ * It first creates a list of ParameterNodes and adds a ParameterNode to it.
+ * Then, it creates a ParameterListNode using the list of ParameterNodes.
+ * After that, it creates a list of StatementNodes and adds a StatementNode to it by calling the getStatementNode method.
+ * Finally, it creates a MethodNode using the provided AccessTypeNode, a BaseTypeNode representing the return type of the method,
+ * the method name, the ParameterListNode, and the list of StatementNodes, and returns this MethodNode.
+ *
+ * @param accessTypeNode The AccessTypeNode representing the access type of the method.
+ * @return The created MemberNode representing the method.
+ */
+private static MemberNode getMemberNode(AccessTypeNode accessTypeNode) {
+    List<ParameterNode> parameterNodeList = new ArrayList<>();
+    ParameterNode parameterNode1 = new ParameterNode(new BaseTypeNode(EnumTypeNode.INT), "param1");
+    parameterNodeList.add(parameterNode1);
+    ParameterListNode parameterListNode = new ParameterListNode(parameterNodeList);
+
+    List<StatementNode> statementNodeList = new ArrayList<>();
+
+    StatementNode statementNode1 = getStatementNode();
+    statementNodeList.add(statementNode1);
+
+    return new MethodNode(accessTypeNode, new BaseTypeNode(EnumTypeNode.INT), "testVar2", parameterListNode, statementNodeList);
+}
+
+    /**
+ * This method is used to create a StatementNode for an assignment operation.
+ * It first creates two IdentifierExpressionNodes for 'this' and 'objectVar'.
+ * Then, it creates a BinaryExpressionNode to represent the operation 'this.objectVar'.
+ * After that, it creates a LiteralNode to represent the integer value 1.
+ * Finally, it creates another BinaryExpressionNode to represent the assignment operation 'this.objectVar = 1',
+ * and wraps this expression in an AssignmentStatementNode.
+ *
+ * @return The created AssignmentStatementNode representing the assignment operation 'this.objectVar = 1'.
+ */
+private static StatementNode getStatementNode() {
+    ExpressionNode expressionNodeObjectVariableLeft = new IdentifierExpressionNode("this");
+    ExpressionNode expressionNodeObjectVariableRight = new IdentifierExpressionNode("objectVar");
+
+    ExpressionNode expressionNodeLeft = new BinaryExpressionNode(expressionNodeObjectVariableLeft, expressionNodeObjectVariableRight, ExpresssionOperator.DOT);
+
+    ExpressionNode expressionNodeRight = new LiteralNode(1);
+
+    BinaryExpressionNode expressionNode = new BinaryExpressionNode(expressionNodeLeft, expressionNodeRight, ExpresssionOperator.ASSIGNMENT);
+
+    return new AssignmentStatementNode(expressionNode);
+}
 }