Test if stderr is in output

src/test/python/domain/test_image.py

@@ -1,4 +1,5 @@
 from pybuilder.core import Project
+from subprocess import Popen, PIPE, run
 from pathlib import Path
 from src.main.python.ddadevops.domain import (
     BuildType,
@@ -12,3 +13,12 @@ def test_devops_build_commons_path():
     assert image is not None
     assert image.is_valid()
     assert "docker/" == image.build_commons_path()
+
+def test_docker_fails_with_error_msg():
+    output = run(
+            f"docker build asdfsdf",
+            shell=True,
+            check=True,
+            stderr=PIPE,
+            text=True
+        ).stderr