Add tests for tag validation

tests/test_docker_utils.py

@@ -0,0 +1,28 @@
+import warnings
+import pytest
+from PyStemmusScope.bmi import docker_utils
+
+
+def test_check_tags():
+    with warnings.catch_warnings():
+        warnings.simplefilter("error")
+        docker_utils.check_tags(
+            image="ghcr.io/ecoextreml/stemmus_scope:1.5.0",
+            compatible_tags=("1.5.0"),
+        )
+
+
+def test_check_missing_tag():
+    with pytest.warns(UserWarning, match="no tag was provided"):
+        docker_utils.check_tags(
+            image="ghcr.io/ecoextreml/stemmus_scope",
+            compatible_tags=("none"),
+        )
+
+
+def test_incompatible_tag():
+    with pytest.warns(UserWarning, match="unexpected results"):
+        docker_utils.check_tags(
+            image="ghcr.io/ecoextreml/stemmus_scope:1.6.0",
+            compatible_tags=("1.5.0", "1.5.1"),
+        )