[enh] Add basic unit test with mock (cert.certification_confirmation)

tests/test_unit_cert.py

+from unittest.mock import patch
+
+from silkaj.cert import certification_confirmation
+
+
+@patch('builtins.input')
+def test_certification_confirmation(mock_input):
+    id_to_certify = {"pubkey": "pubkeyid to certify"}
+    main_id_to_certify = {"uid": "id to certify"}
+    mock_input.return_value = "yes"
+
+    assert certification_confirmation(
+        "certifier id",
+        "certifier pubkey",
+        id_to_certify,
+        main_id_to_certify)
+
+    mock_input.assert_called_once()
+
+
+@patch('builtins.input')
+def test_certification_confirmation_no(mock_input):
+    id_to_certify = {"pubkey": "pubkeyid to certify"}
+    main_id_to_certify = {"uid": "id to certify"}
+    mock_input.return_value = "no"
+
+    assert certification_confirmation(
+        "certifier id",
+        "certifier pubkey",
+        id_to_certify,
+        main_id_to_certify) is None
+
+    mock_input.assert_called_once()