Collect image versions from the local file system

tests/sanity/test_rock.py

@@ -2,11 +2,22 @@
 # Copyright 2024 Canonical, Ltd.
 #
 
+from pathlib import Path
+
 import pytest
+import yaml
 from k8s_test_harness.util import docker_util, env_util
 
+TEST_PATH = Path(__file__)
+REPO_PATH = TEST_PATH.parent.parent.parent
+
+
+def _image_versions():
+    all_rockcrafts = REPO_PATH.glob("**/rockcraft.yaml")
+    yamls = [yaml.safe_load(rock.read_bytes()) for rock in all_rockcrafts]
+    return [rock["version"] for rock in yamls]
 
-@pytest.mark.parametrize("image_version", ["1.11.1", "1.11.3"])
+@pytest.mark.parametrize("image_version", _image_versions())
 def test_sanity(image_version):
     rock = env_util.get_build_meta_info_for_rock_version(
         "coredns", image_version, "amd64"