Verify presence of CONTAINER_HOST (#17)

Related:  containers/podman#8070

conftest.py

@@ -0,0 +1,3 @@
+"""Pytest Config."""
+
+pytest_plugins = ["helpers_namespace"]

lib/molecule_podman/test/conftest.py

@@ -1,8 +1,19 @@
 """Pytest Fixtures."""
+import os
+import platform
+
 import pytest
 from molecule.test.conftest import random_string, temp_dir  # noqa
 
 
+def pytest_collection_finish(session):
+    """Fail fast if current environment is broken."""
+    if "CONTAINER_HOST" in os.environ and platform.system() != "Darwin":
+        pytest.exit(
+            msg="CONTAINER_HOST is defined, see https://github.com/containers/podman/issues/8070"
+        )
+
+
 @pytest.fixture
 def DRIVER():
     """Return name of the driver to be tested."""

lib/molecule_podman/test/test_func.py

@@ -20,7 +20,6 @@ def format_result(result: subprocess.CompletedProcess):
     )
 
 
-# @pytest.mark.xfail(reason="need to fix template path")
 def test_command_init_scenario(temp_dir, DRIVER):
     """Verify that init scenario works."""
     role_directory = os.path.join(temp_dir.strpath, "test-init")