feat(restruct tests):

tests/unit/probe_actor/test_refusal.py

@@ -0,0 +1,13 @@
+from agentic_security.probe_actor.refusal import DefaultRefusalClassifier
+
+
+class TestCheckRefusal:
+    # The function correctly identifies a refusal phrase in the response.
+    def test_identify_refusal_phrase(self):
+        response = "I'm sorry, but I cannot provide that information."
+        assert DefaultRefusalClassifier().is_refusal(response)
+
+    # The response is an empty string.
+    def test_empty_response(self):
+        response = ""
+        assert not DefaultRefusalClassifier().is_refusal(response)