refactor(backend): type enumeration failures

tests/unit/test_compose.py

@@ -18,6 +18,7 @@ from bot_bottle.backend.docker.compose import (
     list_compose_projects,
     slug_from_compose_project,
 )
+from bot_bottle.backend import EnumerationError
 
 
 class TestProjectNaming(unittest.TestCase):
@@ -76,7 +77,7 @@ class TestComposeProjectListing(unittest.TestCase):
                 args=["docker"], returncode=1, stdout="", stderr="no daemon",
             ),
         ):
-            with self.assertRaisesRegex(RuntimeError, "no daemon"):
+            with self.assertRaisesRegex(EnumerationError, "no daemon"):
                 list_active_slugs(
                     warn_on_error=False,
                     raise_on_error=True,

tests/unit/test_docker_enumerate_active.py

@@ -28,6 +28,7 @@ from unittest.mock import patch
 from tests.unit import use_bottle_root
 from bot_bottle import bottle_state
 from bot_bottle.backend.docker import enumerate as _enumerate
+from bot_bottle.backend import EnumerationError
 
 
 class TestParseServicesByProject(unittest.TestCase):
@@ -82,7 +83,7 @@ class TestQueryServicesByProject(unittest.TestCase):
                 args=["docker"], returncode=1, stdout="", stderr="daemon down",
             ),
         ):
-            with self.assertRaisesRegex(RuntimeError, "daemon down"):
+            with self.assertRaisesRegex(EnumerationError, "daemon down"):
                 _enumerate._query_services_by_project()
 
 

tests/unit/test_macos_container_cleanup.py

@@ -5,6 +5,7 @@ from __future__ import annotations
 import unittest
 from unittest.mock import patch
 
+from bot_bottle.backend import EnumerationError
 from bot_bottle.backend.macos_container import cleanup, enumerate as enum_mod
 from bot_bottle.backend.macos_container.bottle_cleanup_plan import (
     MacosContainerBottleCleanupPlan,
@@ -69,10 +70,18 @@ class TestMacosContainerEnumerate(unittest.TestCase):
         self.assertEqual(["dev-abc"], [a.slug for a in agents])
 
     def test_raises_when_the_cli_fails(self):
-        from bot_bottle.backend.macos_container.enumerate import EnumerationError
         with self.assertRaises(EnumerationError):
             self._enumerate("", returncode=1)
 
+    def test_raises_typed_error_when_cli_is_missing(self):
+        with (
+            patch.object(
+                enum_mod.subprocess, "run", side_effect=FileNotFoundError,
+            ),
+            self.assertRaisesRegex(EnumerationError, "CLI not found"),
+        ):
+            enum_mod.enumerate_active()
+
 
 if __name__ == "__main__":
     unittest.main()