diff --git a/src/ast/ast.c b/src/ast/ast.c
index 6e4c106..93420cb 100644
--- a/src/ast/ast.c
+++ b/src/ast/ast.c
@@ -30,6 +30,7 @@ void AST_init() {
 
   INFO("filling lookup table...");
 
+  lookup_table[AST_Stmt] = "stmt";
   lookup_table[AST_Expr] = "expr";
 
   lookup_table[AST_Add] = "+";
@@ -63,6 +64,10 @@ void AST_init() {
   lookup_table[AST_Typedef] = "typedef";
   lookup_table[AST_Box] = "box";
   lookup_table[AST_Fun] = "fun";
+
+  lookup_table[AST_Typecast] = "cast";
+  lookup_table[AST_Transmute] = "as";
+  lookup_table[AST_Condition] = "condition";
 }
 
 const char* AST_node_to_string(struct AST_Node_t* node) {
@@ -77,6 +82,7 @@ const char* AST_node_to_string(struct AST_Node_t* node) {
     case AST_Ident:
     case AST_Macro:
     case AST_Import:
+    case AST_Call:
       string = node->value;
       break;
     default:
diff --git a/src/ast/ast.h b/src/ast/ast.h
index 486a520..0bb9c6e 100644
--- a/src/ast/ast.h
+++ b/src/ast/ast.h
@@ -17,6 +17,7 @@ enum AST_SyntaxElement_t {
   AST_If,
   AST_IfElse,
   AST_Else,
+  AST_Condition,
   // Variable management
   AST_Decl,
   AST_Assign,
diff --git a/tests/ast/CMakeLists.txt b/tests/ast/CMakeLists.txt
index 81e7b96..455130b 100644
--- a/tests/ast/CMakeLists.txt
+++ b/tests/ast/CMakeLists.txt
@@ -24,12 +24,28 @@ add_test(NAME ast_build_tree
 
 add_executable(ast_print_node
         ${PROJECT_SOURCE_DIR}/src/ast/ast.c
+        ${PROJECT_SOURCE_DIR}/src/sys/log.c
         print_node.c)
-set_target_properties(ast_build_tree
+set_target_properties(ast_print_node
         PROPERTIES
-        OUTPUT_NAME "build_tree"
+        OUTPUT_NAME "print_node"
         RUNTIME_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/tests/ast)
 add_test(NAME ast_print_node
         WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
         COMMAND python ${GEMSTONE_TEST_DIR}/ast/test_ast.py check_print_node)
 
+# ------------------------------------------------------- #
+# CTEST 3
+# test graphviz output
+
+add_executable(ast_graphviz
+        ${PROJECT_SOURCE_DIR}/src/ast/ast.c
+        ${PROJECT_SOURCE_DIR}/src/sys/log.c
+        print_graphviz.c)
+set_target_properties(ast_graphviz
+        PROPERTIES
+        OUTPUT_NAME "print_graphviz"
+        RUNTIME_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/tests/ast)
+add_test(NAME ast_graphviz
+        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+        COMMAND python ${GEMSTONE_TEST_DIR}/ast/test_ast.py check_print_graphviz)
diff --git a/tests/ast/print_graphviz.c b/tests/ast/print_graphviz.c
new file mode 100644
index 0000000..6df64b4
--- /dev/null
+++ b/tests/ast/print_graphviz.c
@@ -0,0 +1,54 @@
+//
+// Created by servostar on 5/8/24.
+//
+
+#include <ast/ast.h>
+#include <sys/log.h>
+
+void generate_statement(const AST_NODE_PTR stmt) {
+    const AST_NODE_PTR add = AST_new_node(AST_Add, NULL);
+
+    AST_push_node(add, AST_new_node(AST_Int, "3"));
+    AST_push_node(add, AST_new_node(AST_Int, "6"));
+
+    AST_push_node(stmt, add);
+}
+
+void generate_branch(const AST_NODE_PTR stmt) {
+    const AST_NODE_PTR branch = AST_new_node(AST_If, NULL);
+    const AST_NODE_PTR gt = AST_new_node(AST_Greater, NULL);
+
+    AST_push_node(branch, gt);
+
+    AST_push_node(gt, AST_new_node(AST_Float, "2.3"));
+    AST_push_node(gt, AST_new_node(AST_Float, "0.79"));
+
+    AST_push_node(stmt, branch);
+
+    generate_statement(branch);
+}
+
+int main(void) {
+
+    AST_init();
+
+    const AST_NODE_PTR root = AST_new_node(AST_Stmt, NULL);
+
+    generate_branch(root);
+
+    FILE* output = fopen("tmp/graph.gv", "w");
+
+    if (output == NULL) {
+        PANIC("unable to open file");
+    }
+
+    AST_fprint_graphviz(output, root);
+
+    fflush(output);
+
+    fclose(output);
+
+    AST_delete_node(root);
+
+    return 0;
+}
diff --git a/tests/ast/print_node.c b/tests/ast/print_node.c
index 83d3d43..38e8a41 100644
--- a/tests/ast/print_node.c
+++ b/tests/ast/print_node.c
@@ -6,6 +6,8 @@
 
 int main(void) {
 
+    AST_init();
+
     const AST_NODE_PTR node = AST_new_node(0, "value");
 
     for (size_t i = 0; i < AST_ELEMENT_COUNT; i++) {
@@ -16,4 +18,6 @@ int main(void) {
     }
 
     AST_delete_node(node);
+
+    return 0;
 }
diff --git a/tests/ast/test_ast.py b/tests/ast/test_ast.py
index 111e9c3..8acd654 100644
--- a/tests/ast/test_ast.py
+++ b/tests/ast/test_ast.py
@@ -28,6 +28,71 @@ def run_check_print_node():
     # check exit code
     assert p.returncode == 0
 
+    assert """0 stmt
+1 expr
+2 value
+3 value
+4 value
+5 while
+6 if
+7 else if
+8 else
+9 condition
+10 decl
+11 assign
+12 def
+13 value
+14 +
+15 -
+16 *
+17 /
+18 &
+19 |
+20 ^
+21 !
+22 &&
+23 ||
+24 ^^
+25 !!
+26 ==
+27 >
+28 <
+29 cast
+30 as
+31 value
+32 value
+33 typedef
+34 box
+35 fun
+36 value
+""" == p.stdout
+
+
+def run_check_print_graphviz():
+    info("started check print graphviz...")
+
+    p = subprocess.run(BIN_DIR + "print_graphviz", capture_output=True, text=True)
+
+    info("checking exit code...")
+
+    # check exit code
+    assert p.returncode == 0
+
+    info("converting gv to svg...")
+
+    p = subprocess.run(["dot", "-Tsvg", "tmp/graph.gv", "-otmp/graph.svg"])
+
+    info("checking exit code...")
+    assert p.returncode == 0
+
+    info("checking svg output...")
+    with open("tmp/graph.svg", "r") as file:
+        string = "".join(file.readlines())
+        assert "2.3" in string
+        assert "0.79" in string
+        assert "stmt" in string
+        assert "if" in string
+
 
 if __name__ == "__main__":
     logging.basicConfig(level=logging.INFO)
@@ -41,6 +106,8 @@ if __name__ == "__main__":
             run_check_build_tree()
         case "check_print_node":
             run_check_print_node()
+        case "check_print_graphviz":
+            run_check_print_graphviz()
         case _:
             error(f"unknown target: {target}")
             exit(1)