test(ifdown,iftest): Skip if we don't have network

Without network we likely don't have any interfaces configured either

Fixes: #479

Author: yedayak

test/t/test_ifdown.py

@@ -1,9 +1,15 @@
+import os
+
 import pytest
 
 from conftest import in_container
 
 
 class TestIfdown:
+    @pytest.mark.xfail(
+        os.environ.get("NETWORK") == "none",
+        reason="There won't be any configured interfaces without network",
+    )
     @pytest.mark.xfail(in_container(), reason="Probably fails in a container")
     @pytest.mark.complete("ifdown ")
     def test_1(self, completion):

test/t/test_ifup.py

@@ -1,9 +1,15 @@
+import os
+
 import pytest
 
 from conftest import in_container
 
 
 class TestIfup:
+    @pytest.mark.xfail(
+        os.environ.get("NETWORK") == "none",
+        reason="There won't be any configured interfaces without network",
+    )
     @pytest.mark.xfail(in_container(), reason="Probably fails in a container")
     @pytest.mark.complete("ifup ")
     def test_1(self, completion):