add more fenced tests

tests/unit/test_fenced.py

@@ -0,0 +1,30 @@
+import pytest
+
+from fenced.main import parse_ed
+from fenced.utils import load_disks_from_sys_block
+
+
+@pytest.mark.parametrize(
+    "exclude,expected",
+    [
+        ("sda,", ("sda",)),
+        ("", ()),
+        ("sda,sdb", ("sda", "sdb")),
+        ("sda, sdb", ("sda", "sdb")),
+        ("sda,sdb      sdc", ("sda", "sdb", "sdc")),
+        ("sda sdb sdc", ("sda", "sdb", "sdc")),
+        ("sda     sdb  sdc", ("sda", "sdb", "sdc")),
+    ],
+)
+def test_parse_ed(exclude, expected):
+    assert parse_ed(exclude) == expected
+
+
+@pytest.mark.parametrize("exclude", [tuple(), ("sda"), ("sda,sdb")])
+def test_load_disks_from_sys_block(exclude):
+    """We need to make sure that fenced always enumerates
+    a list of disks."""
+    disks = load_disks_from_sys_block(exclude)
+    assert disks
+    for disk in exclude:
+        assert disk not in disks