Add autocomplete unit tests

cli/testflinger_cli/tests/test_autocomplete.py

@@ -0,0 +1,43 @@
+# Copyright (C) 2024 Canonical
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+"""
+Unit tests for autocomplete helper functions.
+"""
+
+from argparse import Namespace
+from unittest.mock import MagicMock
+from collections import OrderedDict
+
+from testflinger_cli.autocomplete import job_ids_completer
+
+
+def test_job_ids_completer_prefix():
+    """job_ids_completer should only suggest items that match the prefix."""
+    history = MagicMock(
+        history=OrderedDict(
+            {
+                "a48118d7-e57c-4ea7-a405-2c2049a50ede": {...},
+                "afea96e9-2943-4c95-8aa9-e3ae3588c899": {...},
+                "1b2e8d33-0cac-424b-801e-da8cfe5c2a37": {...},
+                "77212a29-bffb-457a-96b1-1b535a74d3ef": {...},
+            }
+        )
+    )
+    suggestions = list(job_ids_completer("a", Namespace(), history))
+    assert suggestions == [
+        "a48118d7-e57c-4ea7-a405-2c2049a50ede",
+        "afea96e9-2943-4c95-8aa9-e3ae3588c899",
+    ]