Add unit tests for answer schema, request data schema, base controller, and history manager

tests/test_base_controller.py

@@ -0,0 +1,34 @@
+import unittest
+from controller.base_controller import BaseController
+
+class TestBaseController(unittest.TestCase):
+    def setUp(self):
+        self.controller = BaseController()
+
+    def test_check_namespace_restricted(self):
+        restricted_namespaces = [
+            "__history",
+            "__last_request",
+            "__last",
+            "__clear",
+            "docs",
+            "redoc",
+            "api",
+        ]
+        for namespace in restricted_namespaces:
+            result = self.controller.check_namespace(namespace)
+            self.assertFalse(result)
+
+    def test_check_namespace_allowed(self):
+        allowed_namespaces = [
+            "test",
+            "example",
+            "namespace",
+            "custom",
+        ]
+        for namespace in allowed_namespaces:
+            result = self.controller.check_namespace(namespace)
+            self.assertTrue(result)
+
+if __name__ == '__main__':
+    unittest.main()