diff --git a/__pycache__/simple_function.cpython-312.pyc b/__pycache__/simple_function.cpython-312.pyc
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index 0000000..d70dbb5
Binary files /dev/null and b/__pycache__/simple_function.cpython-312.pyc differ
diff --git a/simple_function.py b/simple_function.py
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--- /dev/null
+++ b/simple_function.py
@@ -0,0 +1,6 @@
+def greet(name):
+    """A simple function that greets the user."""
+    return f"Hello, {name}!"
+
+if __name__ == "__main__":
+    print(greet("World"))
diff --git a/test_simple_function.py b/test_simple_function.py
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+++ b/test_simple_function.py
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+import unittest
+from simple_function import greet
+
+class TestSimpleFunction(unittest.TestCase):
+    def test_greet(self):
+        self.assertEqual(greet("Alice"), "Hello, Alice!")
+        self.assertEqual(greet("Bob"), "Hello, Bob!")
+        self.assertEqual(greet(""), "Hello, !")
+
+if __name__ == "__main__":
+    unittest.main()