test: add config builder test

tests/test_config.py

@@ -0,0 +1,36 @@
+from metis.pkg import inventory, config
+
+def test_config_build_labels_and_taints():
+    inv = inventory.Inventory(
+        classes=[
+            inventory.NodeClass(
+                Name="c1",
+                Arch="arm64",
+                OS="linux",
+                Image="file:///tmp/base.img",
+                DefaultLabels={"a": "1"},
+                DefaultTaints=["t1"],
+            )
+        ],
+        Nodes=[
+            inventory.NodeSpec(
+                Name="n1",
+                Class="c1",
+                Hostname="n1",
+                IP="1.1.1.1",
+                K3sRole="agent",
+                Labels={"b": "2"},
+                Taints=["t2"],
+                LonghornDisks=[inventory.LonghornDisk(Mountpoint="/mnt/d1", UUID="uuid-1", FS="ext4")],
+                SSHUser="ubuntu",
+                SSHAuthorized=["key"],
+            )
+        ],
+    )
+    cfg, err = config.Build(inv, "n1")
+    assert err is None
+    assert cfg.Labels == {"a": "1", "b": "2"}
+    assert cfg.Taints == ["t1", "t2"]
+    assert cfg.Fstab[0].Mountpoint == "/mnt/d1"
+    assert cfg.Fstab[0].UUID == "uuid-1"
+    assert cfg.K3s.Role == "agent"