Create test_todo.py

test_todo.py

@@ -0,0 +1,23 @@
+# test_todo.py
+
+import unittest
+from todo import Todo
+
+class TestTodo(unittest.TestCase):
+
+    def setUp(self):
+        self.todo = Todo()
+
+    def test_add_task(self):
+        # Test adding a valid task
+        result = self.todo.add_task("Buy milk")
+        self.assertIn("Task 'Buy milk' added.", result)
+        self.assertIn("Buy milk", self.todo.get_tasks())
+
+    def test_add_empty_task(self):
+        # Test adding an empty task, should raise ValueError
+        with self.assertRaises(ValueError):
+            self.todo.add_task("")
+
+if __name__ == "__main__":
+    unittest.main()