Add action for getting container names list

This patch adds a new action to kolla_container_facts
module, which retrieves list of names of all containers.
It is intended to be an alternative to using
"docker ps -a" type of commands in the Ansible code.

Change-Id: I9c04d6fe77f20e5aa832684bd65de95d161cd8ea
Signed-off-by: Ivan Halomi <ivan.halomi@tietoevry.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/test_kolla_container_facts.py b/tests/test_kolla_container_facts.py
index f1fc59f3e..0db0c2eb4 100644
--- a/tests/test_kolla_container_facts.py
+++ b/tests/test_kolla_container_facts.py
@@ -310,3 +310,27 @@ class TestContainerFacts(base.BaseTestCase):
         self.assertIn('volumes', self.dfw.result)
         self.assertEqual(len(self.dfw.result['volumes']), 0)
         self.assertNotIn('nonexistent_volume', self.dfw.result['volumes'])
+
+    def test_get_containers_names(self):
+        """Test fetching container names when containers exist"""
+        self.dfw = get_DockerFactsWorker({'action': 'get_containers_names'})
+        full_cont_list = get_containers(self.fake_data['containers'])
+        self.dfw.client.containers.list.return_value = full_cont_list
+        expected_names = ["my_container"]
+
+        self.dfw.get_containers_names()
+
+        self.assertFalse(self.dfw.result['changed'])
+        self.assertIn('container_names', self.dfw.result)
+        self.assertEqual(self.dfw.result['container_names'], expected_names)
+
+    def test_get_containers_names_no_containers(self):
+        """Test fetching container names when no containers exist"""
+        self.dfw = get_DockerFactsWorker({'action': 'get_containers_names'})
+        self.dfw.client.containers.list.return_value = []
+
+        self.dfw.get_containers_names()
+
+        self.assertFalse(self.dfw.result['changed'])
+        self.assertIn('container_names', self.dfw.result)
+        self.assertEqual(self.dfw.result['container_names'], [])