diff --git a/tests/integration/test_full_workflow.py b/tests/integration/test_full_workflow.py
new file mode 100644
index 0000000..655c664
--- /dev/null
+++ b/tests/integration/test_full_workflow.py
@@ -0,0 +1,193 @@
+import pytest
+import tempfile
+import json
+from pathlib import Path
+from src.parsers.python import PythonParser
+from src.parsers.javascript import JavaScriptParser
+from src.graph.builder import GraphBuilder, GraphType
+from src.analyzers.complexity import ComplexityCalculator
+from src.exporters.json_exporter import JSONExporter
+
+
+class TestFullWorkflow:
+    def test_python_file_analysis(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            test_file = Path(tmpdir) / "test.py"
+            test_file.write_text("""
+def hello(name):
+    if name:
+        print(f"Hello, {name}")
+    else:
+        print("Hello, World")
+
+class Greeter:
+    def __init__(self, prefix):
+        self.prefix = prefix
+
+    def greet(self, name):
+        if self.prefix and name:
+            return f"{self.prefix} {name}"
+        return "Hello
+""")
+
+            parser = PythonParser()
+            content = test_file.read_text()
+            result = parser.parse(test_file, content)
+
+            assert result.language == "python"
+            assert len(result.entities) >= 2
+            assert any(e.name == "hello" for e in result.entities)
+            assert any(e.name == "Greeter" for e in result.entities)
+
+    def test_javascript_file_analysis(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            test_file = Path(tmpdir) / "test.js"
+            test_file.write_text("""
+function calculate(a, b) {
+    if (a > 0 && b > 0) {
+        return a + b;
+    }
+    return 0;
+}
+
+class Calculator {
+    constructor() {
+        this.value = 0;
+    }
+
+    add(num) {
+        this.value += num;
+        return this.value;
+    }
+}
+""")
+
+            parser = JavaScriptParser()
+            content = test_file.read_text()
+            result = parser.parse(test_file, content)
+
+            assert result.language == "javascript"
+            assert len(result.entities) >= 2
+
+    def test_graph_construction(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            file1 = Path(tmpdir) / "main.py"
+            file1.write_text("""
+from utils import helper
+
+def main():
+    helper()
+""")
+
+            file2 = Path(tmpdir) / "utils.py"
+            file2.write_text("""
+def helper():
+    print("Helper")
+""")
+
+            builder = GraphBuilder(GraphType.DIRECTED)
+
+            parser = PythonParser()
+            results = []
+            for file_path in [file1, file2]:
+                content = file_path.read_text()
+                result = parser.parse(file_path, content)
+                results.append(result)
+
+            builder.build_from_parser_results(results)
+            nodes = builder.get_nodes()
+
+            assert len(nodes) >= 2
+
+    def test_complexity_calculation(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            test_file = Path(tmpdir) / "test.py"
+            test_file.write_text("""
+def complex_function(x, y, z):
+    if x > 0:
+        if y > 0:
+            for i in range(z):
+                if i % 2 == 0:
+                    print(i)
+    return True
+""")
+
+            parser = PythonParser()
+            content = test_file.read_text()
+            result = parser.parse(test_file, content)
+
+            calculator = ComplexityCalculator()
+
+            for entity in result.entities:
+                complexity = calculator.calculate_for_entity(entity)
+                assert complexity["complexity_score"] >= 1
+
+    def test_json_export(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            test_file = Path(tmpdir) / "test.py"
+            test_file.write_text("""
+def simple():
+    pass
+""")
+
+            parser = PythonParser()
+            content = test_file.read_text()
+            result = parser.parse(test_file, content)
+
+            builder = GraphBuilder(GraphType.DIRECTED)
+            builder.build_from_parser_results([result])
+
+            exporter = JSONExporter(builder)
+
+            output_file = Path(tmpdir) / "output.json"
+            exporter.export(output_file)
+
+            assert output_file.exists()
+            data = json.loads(output_file.read_text())
+            assert "nodes" in data
+            assert "edges" in data
+
+    def test_multi_file_project_analysis(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            (Path(tmpdir) / "main.py").write_text("""
+from module_a import func_a
+from module_b import func_b
+
+def main():
+    func_a()
+    func_b()
+""")
+
+            (Path(tmpdir) / "module_a.py").write_text("""
+def func_a():
+    pass
+
+class ClassA:
+    pass
+""")
+
+            (Path(tmpdir) / "module_b.py").write_text("""
+def func_b():
+    pass
+""")
+
+            parser = PythonParser()
+            results = []
+
+            for py_file in Path(tmpdir).glob("*.py"):
+                content = py_file.read_text()
+                result = parser.parse(py_file, content)
+                results.append(result)
+
+            builder = GraphBuilder(GraphType.DIRECTED)
+            builder.build_from_parser_results(results)
+
+            nodes = builder.get_nodes()
+            assert len(nodes) >= 3
+
+            file_nodes = [n for n in nodes if n.node_type.value == "file"]
+            func_nodes = [n for n in nodes if n.node_type.value == "function"]
+            class_nodes = [n for n in nodes if n.node_type.value == "class"]
+
+            assert len(file_nodes) == 3
+            assert len(func_nodes) >= 3