virtualbox: simplify ParseSnapshotData

builder/virtualbox/common/snapshot.go

@@ -29,13 +29,23 @@ func ParseSnapshotData(snapshotData string) (*VBoxSnapshot, error) {
 
 	for scanner.Scan() {
 		txt := scanner.Text()
-		idx := strings.Index(txt, "=")
-		if idx > 0 {
+		if !strings.Contains(txt, "=") {
+			log.Printf("Invalid key,value pair [%s]", txt)
+			continue
+		}
 		if strings.HasPrefix(txt, "Current") {
 			node.IsCurrent = true
-			} else {
+			continue
+		}
 		matches := SnapshotNamePartsRe.FindStringSubmatch(txt)
-				if len(matches) >= 2 && matches[1] == "Name" {
+		if len(matches) < 2 {
+			continue
+		}
+
+		switch matches[1] {
+		case "UUID":
+			node.UUID = matches[4]
+		case "Name":
 			if nil == rootNode {
 				node = new(VBoxSnapshot)
 				rootNode = node
@@ -60,12 +70,6 @@ func ParseSnapshotData(snapshotData string) (*VBoxSnapshot, error) {
 				}
 			}
 			node.Name = matches[4]
-				} else if matches[1] == "UUID" {
-					node.UUID = matches[4]
-				}
-			}
-		} else {
-			log.Printf("Invalid key,value pair [%s]", txt)
 		}
 	}
 	return rootNode, nil

builder/virtualbox/common/snapshot_test.go

@@ -134,3 +134,10 @@ func TestSnapshot_EnsureParents(t *testing.T) {
 		}
 	}
 }
+
+func TestSnapshot_WrongSnapshot(t *testing.T) {
+	rootNode, err := ParseSnapshotData(`Potato=
+	`)
+	assert.Nil(t, err)
+	assert.Nil(t, rootNode)
+}