Nesting level initialisation for root children is fixed (#8)

Co-authored-by: Konstantin Zhernosenko <konstantin.zhernosenko@humans.net>

lib/tree/tree.go

@@ -60,7 +60,7 @@ func NewSubTree(name, parentFullKey string) *Tree {
 		Content:      make(map[string]Marshalable),
 		Name:         name,
 		FullKey:      MakeFullKey(parentFullKey, name),
-		nestingLevel: strings.Count(parentFullKey, sep) + 2,
+		nestingLevel: initNestingLevel(parentFullKey),
 	}
 }
 
@@ -69,15 +69,15 @@ func NewBranch(name, parentFullKey string) *Branch {
 		Content:      []Marshalable{},
 		Name:         name,
 		FullKey:      MakeFullKey(parentFullKey, name),
-		nestingLevel: strings.Count(parentFullKey, sep) + 2,
+		nestingLevel: initNestingLevel(parentFullKey),
 	}
 }
 
 func NewLeaf(name, parentFullKey string) *Leaf {
 	return &Leaf{
 		Name:         name,
 		FullKey:      MakeFullKey(parentFullKey, name),
-		nestingLevel: strings.Count(parentFullKey, sep) + 2,
+		nestingLevel: initNestingLevel(parentFullKey),
 	}
 }
 
@@ -477,6 +477,14 @@ func (ml *Leaf) GetNestingLevel() int {
 	return ml.nestingLevel
 }
 
+func initNestingLevel(parentFullKey string) int {
+	if len(parentFullKey) == 0 {
+		return 1
+	}
+
+	return strings.Count(parentFullKey, sep) + 2
+}
+
 func (mt *Tree) clearValues() {
 	if len(mt.Content) > 0 {
 		mt.Content = make(map[string]Marshalable)

lib/tree/yaml.go

@@ -110,12 +110,6 @@ func (ml *Leaf) UnmarshalYAML(node *yaml.Node) error {
 	switch node.Kind {
 	case yaml.ScalarNode:
 		ml.Value = node.Value
-	case yaml.SequenceNode:
-		leafValue, err := yaml.Marshal(node)
-		if err != nil {
-			return fmt.Errorf("marshal sequence %q: %w", ml.FullKey, err)
-		}
-		ml.Value = string(leafValue)
 	default:
 		return fmt.Errorf("unprocessable content type `%v` for leaf %q", node.Kind, ml.FullKey)
 	}