unit test + nil check pointers

internal/pkg/node/node_test.go

@@ -0,0 +1,40 @@
+package node
+
+import (
+	"testing"
+
+	"gopkg.in/yaml.v2"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNodeUpdate(t *testing.T) {
+	var nodeConfig = `
+WW_INTERNAL: 43
+nodeprofiles:
+  default:
+    comment: This profile is automatically included for each node
+nodes:
+  n0000:
+    discoverable: true
+    profiles:
+    - default
+    network devices:
+      default:
+        onboot: true
+        device: eth0
+        hwaddr: 08:00:27:39:46:70
+        ipaddr: 10.0.8.150	
+`
+	var nodeYaml nodeYaml
+	err := yaml.Unmarshal([]byte(nodeConfig), &nodeYaml)
+	assert.NoError(t, err)
+
+	err = nodeYaml.NodeUpdate(
+		NodeInfo{
+			Id: Entry {
+				value: []string{"n0000"},
+			},
+		},
+	)
+	assert.NoError(t, err)
+}