added test for bad urls

Author: grodzki-lanl

unittests/data/systems/mirror-bad-url/mirrors.yaml

@@ -1,2 +1,2 @@
-- name: bad-url
-  url: google.com
+bad-url:
+  url: https://www.testsite.io/services

unittests/test_mirrors.py

@@ -31,6 +31,14 @@ def test_mirror_init(systems_path, valid_mirrors):
     for mir in mirrors_obj.mirrors:
         assert mirrors_obj.mirrors[mir].get('enabled')
 
+def test_mirror_init_bad_url(systems_path):
+    """Check that MirrorError is raised for a bad url."""
+
+    path = systems_path / "mirror-bad-url"
+
+    with pytest.raises(mirror.MirrorError):
+        mirrors_obj = mirror.Mirrors(path)
+
 def test_command_line_cache(systems_path):
     """Check that adding a cache from the command line works."""