--- /dev/null
+package org.onap.cps.model
+
+import org.onap.cps.TestUtils
+import org.onap.cps.spi.model.DataNodeBuilder
+import org.onap.cps.utils.YangUtils
+import org.onap.cps.yang.YangTextSchemaSourceSetBuilder
+import spock.lang.Specification
+
+class DataNodeBuilderSpec extends Specification {
+
+ def 'Converting Normalized Node (tree) to a DataNode (tree).'() {
+ given: 'a Yang module'
+ def yangResourceNameToContent = TestUtils.getYangResourcesAsMap('bookstore.yang')
+ def schemaContext = YangTextSchemaSourceSetBuilder.of(yangResourceNameToContent)getSchemaContext()
+ and: 'a normalized node for that model'
+ def jsonData = TestUtils.getResourceFileContent('bookstore.json')
+ def normalizedNode = YangUtils.parseJsonData(jsonData, schemaContext)
+ when: 'the normalized node is converted to a DataNode (tree)'
+ def result = new DataNodeBuilder().withNormalizedNodeTree(normalizedNode).build()
+ then: 'the system creates a (root) fragment without a parent and 2 children (categories)'
+ result.childDataNodes.size() == 2
+ and: 'each child (category) has the root fragment (result) as parent and in turn as 1 child (a list of books)'
+ result.childDataNodes.each { it.childDataNodes.size() == 1 }
+ and: 'the fragments have the correct xpaths'
+ assert result.xpath == '/bookstore'
+ assert result.childDataNodes.collect { it.xpath }
+ .containsAll(["/bookstore/categories[@code='01']", "/bookstore/categories[@code='02']"])
+ }
+}