BUG-9265: Switch empty type mapping from Void to Empty
[yangtools.git] / yang / yang-data-codec-gson / src / test / java / org / opendaylight / yangtools / yang / data / codec / gson / NormalizedNodeToJsonStreamTest.java
index 90fd51b80302a420df40ef01a93ef81cec99a4f0..2f9fa49d1a54b4d5f7b61d793ae877dd09f6c2f5 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
+ * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
@@ -13,12 +13,12 @@ import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 import static org.opendaylight.yangtools.yang.data.codec.gson.TestUtils.childArray;
 import static org.opendaylight.yangtools.yang.data.codec.gson.TestUtils.childPrimitive;
-import static org.opendaylight.yangtools.yang.data.codec.gson.TestUtils.loadModules;
 import static org.opendaylight.yangtools.yang.data.codec.gson.TestUtils.resolveCont1;
 
-import com.google.common.collect.Sets;
+import com.google.common.collect.ImmutableSet;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
+import com.google.gson.JsonNull;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonPrimitive;
 import java.io.IOException;
@@ -28,366 +28,296 @@ import java.net.URISyntaxException;
 import java.util.HashSet;
 import java.util.Iterator;
 import org.junit.BeforeClass;
-import org.junit.Ignore;
 import org.junit.Test;
+import org.opendaylight.yangtools.yang.common.Empty;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
+import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
+import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.model.api.SchemaPath;
+import org.opendaylight.yangtools.yang.test.util.YangParserTestUtils;
 
 /**
  * Each test tests whether json output obtained after transformation contains is corect. The transformation takes
  * normalized node data structure and transform it to json output. To make it easier validate json output it is loaded
  * via gson as structure of json elements which are walked and compared with awaited values.
- *
  */
 public class NormalizedNodeToJsonStreamTest {
 
+    private static final QName CONT_1 = QName.create("ns:complex:json", "2014-08-11", "cont1");
+    private static final QName EMPTY_LEAF = QName.create(CONT_1, "empty");
     private static SchemaContext schemaContext;
 
-    public interface JsonValidator {
-        void validate(final String jsonOutput);
-   }
-
     @BeforeClass
-    public static void initialization() throws IOException, URISyntaxException {
-        schemaContext = loadModules("/complexjson/yang");
-    }
-
-    /**
-     * case when anyxml contains simple value will be implemented when anyxml normalized node reprezentation will be
-     * specified
-     */
-    @Ignore
-    @Test
-    public void anyXmlNodeWithSimpleValueInContainer() throws IOException, URISyntaxException {
-
-    }
-
-    /**
-     * case when anyxml contains complex xml will be implemented when anyxml normalized node reprezentation will be
-     * specified
-     */
-    @Ignore
-    @Test
-    public void anyXmlNodeWithCompositeValueInContainer() throws IOException, URISyntaxException {
-
+    public static void initialization() {
+        schemaContext = YangParserTestUtils.parseYangResourceDirectory("/complexjson/yang");
     }
 
     @Test
     public void leafNodeInContainer() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> leafNodeInContainer = TestingNormalizedNodeStructuresCreator.leafNodeInContainer();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, leafNodeInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-
-                JsonPrimitive lf11 = childPrimitive(cont1, "complexjson:lf11", "lf11");
-                assertNotNull(lf11);
-                int asInt = lf11.getAsInt();
-                assertEquals(453, asInt);
-            }
-        }.validate(jsonOutput);
-
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> leafNodeInContainer = TestingNormalizedNodeStructuresCreator.leafNodeInContainer();
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, leafNodeInContainer);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
+
+        final JsonPrimitive lf11 = childPrimitive(cont1, "complexjson:lf11", "lf11");
+        assertNotNull(lf11);
+        final int asInt = lf11.getAsInt();
+        assertEquals(453, asInt);
     }
 
     @Test
     public void leafListNodeInContainerMultiline() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> leafListNodeInContainer = TestingNormalizedNodeStructuresCreator.leafListNodeInContainerMultiline();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, leafListNodeInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-                JsonArray lflst11 = childArray(cont1, "complexjson:lflst11", "lflst11");
-                assertNotNull(lflst11);
-
-                HashSet<Object> lflst11Values = Sets.newHashSet();
-                for (JsonElement jsonElement : lflst11) {
-                    assertTrue(jsonElement instanceof JsonPrimitive);
-                    lflst11Values.add(((JsonPrimitive) jsonElement).getAsString());
-                }
-
-                assertEquals(Sets.newHashSet("lflst11 value2\r\nanother line 2", "lflst11 value1\nanother line 1"), lflst11Values);
-            }
-        }.validate(jsonOutput);
-
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> leafListNodeInContainer = TestingNormalizedNodeStructuresCreator
+                .leafListNodeInContainerMultiline();
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, leafListNodeInContainer);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
+        final JsonArray lflst11 = childArray(cont1, "complexjson:lflst11", "lflst11");
+        assertNotNull(lflst11);
+
+        final HashSet<Object> lflst11Values = new HashSet<>();
+        for (final JsonElement jsonElement : lflst11) {
+            assertTrue(jsonElement instanceof JsonPrimitive);
+            lflst11Values.add(jsonElement.getAsString());
+        }
+
+        assertEquals(ImmutableSet.of("lflst11 value2\r\nanother line 2", "lflst11 value1\nanother line 1"),
+            lflst11Values);
     }
 
     @Test
     public void leafNodeViaAugmentationInContainer() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> leafNodeViaAugmentationInContainer = TestingNormalizedNodeStructuresCreator
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> leafNodeViaAugmentationInContainer = TestingNormalizedNodeStructuresCreator
                 .leafNodeViaAugmentationInContainer();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, leafNodeViaAugmentationInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-
-                JsonPrimitive lf12_1 = childPrimitive(cont1, "complexjson:lf12_1", "lf12_1");
-                assertNotNull(lf12_1);
-                String asString = lf12_1.getAsString();
-                assertEquals("lf12 value", asString);
-            }
-        }.validate(jsonOutput);
-
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, leafNodeViaAugmentationInContainer);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
+
+        final JsonPrimitive lf12_1 = childPrimitive(cont1, "complexjson:lf12_1", "lf12_1");
+        assertNotNull(lf12_1);
+        final String asString = lf12_1.getAsString();
+        assertEquals("lf12 value", asString);
     }
 
     @Test
     public void leafListNodeInContainer() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> leafListNodeInContainer = TestingNormalizedNodeStructuresCreator.leafListNodeInContainer();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, leafListNodeInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-                JsonArray lflst11 = childArray(cont1, "complexjson:lflst11", "lflst11");
-                assertNotNull(lflst11);
-
-                HashSet<Object> lflst11Values = Sets.newHashSet();
-                for (JsonElement jsonElement : lflst11) {
-                    assertTrue(jsonElement instanceof JsonPrimitive);
-                    lflst11Values.add(((JsonPrimitive) jsonElement).getAsString());
-                }
-
-                assertEquals(Sets.newHashSet("lflst11 value2", "lflst11 value1"), lflst11Values);
-            }
-        }.validate(jsonOutput);
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> leafListNodeInContainer = TestingNormalizedNodeStructuresCreator
+                .leafListNodeInContainer();
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, leafListNodeInContainer);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
+        final JsonArray lflst11 = childArray(cont1, "complexjson:lflst11", "lflst11");
+        assertNotNull(lflst11);
+
+        final HashSet<Object> lflst11Values = new HashSet<>();
+        for (final JsonElement jsonElement : lflst11) {
+            assertTrue(jsonElement instanceof JsonPrimitive);
+            lflst11Values.add(jsonElement.getAsString());
+        }
+
+        assertEquals(ImmutableSet.of("lflst11 value2", "lflst11 value1"), lflst11Values);
     }
 
     @Test
     public void keyedListNodeInContainer() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> keyedListNodeInContainer = TestingNormalizedNodeStructuresCreator
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> keyedListNodeInContainer = TestingNormalizedNodeStructuresCreator
                 .keyedListNodeInContainer();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, keyedListNodeInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-                JsonArray lst11 = childArray(cont1, "complexjson:lst11", "lst11");
-                assertNotNull(lst11);
-
-                Iterator<JsonElement> iterator = lst11.iterator();
-                assertTrue(iterator.hasNext());
-                JsonElement lst11Entry1Raw = iterator.next();
-                assertFalse(iterator.hasNext());
-                assertTrue(lst11Entry1Raw instanceof JsonObject);
-                JsonObject lst11Entry1 = (JsonObject) lst11Entry1Raw;
-
-                JsonPrimitive key111 = childPrimitive(lst11Entry1, "complexjson:key111", "key111");
-                assertNotNull(key111);
-                JsonPrimitive lf112 = childPrimitive(lst11Entry1, "complexjson:lf112", "lf112");
-                assertNotNull(lf112);
-                JsonPrimitive lf113 = childPrimitive(lst11Entry1, "complexjson:lf113", "lf113");
-                assertNotNull(lf113);
-                JsonPrimitive lf111 = childPrimitive(lst11Entry1, "complexjson:lf111", "lf111");
-                assertNotNull(lf111);
-
-                assertEquals("key111 value", key111.getAsString());
-                assertEquals("/complexjson:cont1/complexjson:lflst11[.='foo']", lf112.getAsString());
-                assertEquals("lf113 value", lf113.getAsString());
-                assertEquals("lf111 value", lf111.getAsString());
-            }
-        }.validate(jsonOutput);
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, keyedListNodeInContainer);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
+        final JsonArray lst11 = childArray(cont1, "complexjson:lst11", "lst11");
+        assertNotNull(lst11);
+
+        final Iterator<JsonElement> iterator = lst11.iterator();
+        assertTrue(iterator.hasNext());
+        final JsonElement lst11Entry1Raw = iterator.next();
+        assertFalse(iterator.hasNext());
+        assertTrue(lst11Entry1Raw instanceof JsonObject);
+        final JsonObject lst11Entry1 = (JsonObject) lst11Entry1Raw;
+
+        final JsonPrimitive key111 = childPrimitive(lst11Entry1, "complexjson:key111", "key111");
+        assertNotNull(key111);
+        final JsonPrimitive lf112 = childPrimitive(lst11Entry1, "complexjson:lf112", "lf112");
+        assertNotNull(lf112);
+        final JsonPrimitive lf113 = childPrimitive(lst11Entry1, "complexjson:lf113", "lf113");
+        assertNotNull(lf113);
+        final JsonPrimitive lf111 = childPrimitive(lst11Entry1, "complexjson:lf111", "lf111");
+        assertNotNull(lf111);
+
+        assertEquals("key111 value", key111.getAsString());
+        assertEquals("/complexjson:cont1/complexjson:lflst11[.='foo']", lf112.getAsString());
+        assertEquals("lf113 value", lf113.getAsString());
+        assertEquals("lf111 value", lf111.getAsString());
     }
 
     @Test
     public void choiceNodeInContainer() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> choiceNodeInContainer = TestingNormalizedNodeStructuresCreator.choiceNodeInContainer();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, choiceNodeInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-                JsonPrimitive lf13 = childPrimitive(cont1, "complexjson:lf13", "lf13");
-                assertNotNull(lf13);
-
-                assertEquals("lf13 value", lf13.getAsString());
-            }
-        }.validate(jsonOutput);
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> choiceNodeInContainer = TestingNormalizedNodeStructuresCreator
+                .choiceNodeInContainer();
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, choiceNodeInContainer);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
+        final JsonPrimitive lf13 = childPrimitive(cont1, "complexjson:lf13", "lf13");
+        assertNotNull(lf13);
+
+        assertEquals("lf13 value", lf13.getAsString());
     }
 
     /**
      * tested case when case c11A in choice choc11 is augmented (two leaves (augment A) and one leaf (augment B) are
-     * added)
-     *
-     * after running this test following exception is raised
+     * added).
      *
+     * <p>
+     * after running this test following exception is raised:
      * java.lang.IllegalArgumentException: Augmentation allowed only in DataNodeContainer
      * [ChoiceNodeImpl[qname=(ns:complex:json?revision=2014-08-11)choc11]]
-     *
      */
-//    @Ignore
     @Test
     public void caseNodeAugmentationInChoiceInContainer() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> caseNodeAugmentationInChoiceInContainer = TestingNormalizedNodeStructuresCreator
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> caseNodeAugmentationInChoiceInContainer = TestingNormalizedNodeStructuresCreator
                 .caseNodeAugmentationInChoiceInContainer();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, caseNodeAugmentationInChoiceInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-
-                JsonPrimitive lf15_21 = childPrimitive(cont1, "complexjson:lf15_21", "lf15_21");
-                assertNotNull(lf15_21);
-                JsonPrimitive lf13 = childPrimitive(cont1, "complexjson:lf13", "lf13");
-                assertNotNull(lf13);
-                JsonPrimitive lf15_11 = childPrimitive(cont1, "complexjson:lf15_11", "lf15_11");
-                assertNotNull(lf15_11);
-                JsonPrimitive lf15_12 = childPrimitive(cont1, "complexjson:lf15_12", "lf15_12");
-                assertNotNull(lf15_12);
-
-                assertEquals("lf15_21 value", lf15_21.getAsString());
-                assertEquals("lf13 value", lf13.getAsString());
-                assertTrue("one two".equals(lf15_11.getAsString()) || "two one".equals(lf15_11.getAsString()));
-                assertEquals("complexjson:lf11", lf15_12.getAsString());
-
-            }
-        }.validate(jsonOutput);
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer,
+                caseNodeAugmentationInChoiceInContainer);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
+
+        final JsonPrimitive lf15_21 = childPrimitive(cont1, "complexjson:lf15_21", "lf15_21");
+        assertNotNull(lf15_21);
+        final JsonPrimitive lf13 = childPrimitive(cont1, "complexjson:lf13", "lf13");
+        assertNotNull(lf13);
+        final JsonPrimitive lf15_11 = childPrimitive(cont1, "complexjson:lf15_11", "lf15_11");
+        assertNotNull(lf15_11);
+        final JsonPrimitive lf15_12 = childPrimitive(cont1, "complexjson:lf15_12", "lf15_12");
+        assertNotNull(lf15_12);
+
+        assertEquals("lf15_21 value", lf15_21.getAsString());
+        assertEquals("lf13 value", lf13.getAsString());
+        assertTrue("one two".equals(lf15_11.getAsString()) || "two one".equals(lf15_11.getAsString()));
+        assertEquals("complexjson:lf11", lf15_12.getAsString());
     }
 
     /**
      * tested case when case c11A in choice choc11 is augmented (two leaves (augment A) internally and one two leaves
-     * with the same names externally (augment B) are added)
-     *
-     * after running this test following exception is raised
+     * with the same names externally (augment B) are added).
      *
+     * <p>
+     * after running this test following exception is raised:
      * java.lang.IllegalArgumentException: Augmentation allowed only in DataNodeContainer
      * [ChoiceNodeImpl[qname=(ns:complex:json?revision=2014-08-11)choc11]]
-     *
      */
-//    @Ignore
     @Test
     public void caseNodeExternalAugmentationInChoiceInContainer() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> caseNodeExternalAugmentationInChoiceInContainer = TestingNormalizedNodeStructuresCreator
-                .caseNodeExternalAugmentationInChoiceInContainer();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer,
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> caseNodeExternalAugmentationInChoiceInContainer =
+                TestingNormalizedNodeStructuresCreator.caseNodeExternalAugmentationInChoiceInContainer();
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer,
                 caseNodeExternalAugmentationInChoiceInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-
-                JsonPrimitive lf15_11Augment = childPrimitive(cont1, "complexjson-augmentation:lf15_11");
-                assertNotNull(lf15_11Augment);
-                JsonPrimitive lf15_12Augment = childPrimitive(cont1, "complexjson-augmentation:lf15_12");
-                assertNotNull(lf15_12Augment);
-                JsonPrimitive lf13 = childPrimitive(cont1, "complexjson:lf13", "lf13");
-                assertNotNull(lf13);
-                JsonPrimitive lf15_11 = childPrimitive(cont1, "complexjson:lf15_11", "lf15_11");
-                assertNotNull(lf15_11);
-                JsonPrimitive lf15_12 = childPrimitive(cont1, "complexjson:lf15_12", "lf15_12");
-                assertNotNull(lf15_12);
-
-                assertEquals("lf15_11 value from augmentation", lf15_11Augment.getAsString());
-                assertEquals("lf15_12 value from augmentation", lf15_12Augment.getAsString());
-                assertEquals("lf13 value", lf13.getAsString());
-                assertTrue("one two".equals(lf15_11.getAsString()) || "two one".equals(lf15_11.getAsString()));
-                assertEquals("complexjson:lf11", lf15_12.getAsString());
-
-            }
-        }.validate(jsonOutput);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
+
+        final JsonPrimitive lf15_11Augment = childPrimitive(cont1, "complexjson-augmentation:lf15_11");
+        assertNotNull(lf15_11Augment);
+        final JsonPrimitive lf15_12Augment = childPrimitive(cont1, "complexjson-augmentation:lf15_12");
+        assertNotNull(lf15_12Augment);
+        final JsonPrimitive lf13 = childPrimitive(cont1, "complexjson:lf13", "lf13");
+        assertNotNull(lf13);
+        final JsonPrimitive lf15_11 = childPrimitive(cont1, "complexjson:lf15_11", "lf15_11");
+        assertNotNull(lf15_11);
+        final JsonPrimitive lf15_12 = childPrimitive(cont1, "complexjson:lf15_12", "lf15_12");
+        assertNotNull(lf15_12);
+
+        assertEquals("lf15_11 value from augmentation", lf15_11Augment.getAsString());
+        assertEquals("lf15_12 value from augmentation", lf15_12Augment.getAsString());
+        assertEquals("lf13 value", lf13.getAsString());
+        assertTrue("one two".equals(lf15_11.getAsString()) || "two one".equals(lf15_11.getAsString()));
+        assertEquals("complexjson:lf11", lf15_12.getAsString());
     }
 
     /**
-     * augmentation of choice - adding new case
-     *
-     * after running this test following exception is raised
+     * augmentation of choice - adding new case.
      *
+     * <p>
+     * after running this test following exception is raised:
      * java.lang.IllegalArgumentException: Augmentation allowed only in DataNodeContainer
      * [ChoiceNodeImpl[qname=(ns:complex:json?revision=2014-08-11)choc11]]
-     *
      */
-//    @Ignore
     @Test
     public void choiceNodeAugmentationInContainer() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> choiceNodeAugmentationInContainer = TestingNormalizedNodeStructuresCreator
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> choiceNodeAugmentationInContainer = TestingNormalizedNodeStructuresCreator
                 .choiceNodeAugmentationInContainer();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer,
-                choiceNodeAugmentationInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-
-                JsonPrimitive lf17 = childPrimitive(cont1, "complexjson:lf17","lf17");
-                assertNotNull(lf17);
-                assertEquals("lf17 value",lf17.getAsString());
-            }
-        }.validate(jsonOutput);
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, choiceNodeAugmentationInContainer);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
+
+        final JsonPrimitive lf17 = childPrimitive(cont1, "complexjson:lf17", "lf17");
+        assertNotNull(lf17);
+        assertEquals("lf17 value", lf17.getAsString());
     }
 
     @Test
     public void unkeyedNodeInContainer() throws IOException, URISyntaxException {
-        Writer writer = new StringWriter();
-        NormalizedNode<?, ?> unkeyedNodeInContainer = TestingNormalizedNodeStructuresCreator
+        final Writer writer = new StringWriter();
+        final NormalizedNode<?, ?> unkeyedNodeInContainer = TestingNormalizedNodeStructuresCreator
                 .unkeyedNodeInContainer();
-        String jsonOutput = normalizedNodeToJsonStreamTransformation(writer,
-                unkeyedNodeInContainer);
-        new JsonValidator() {
-
-            @Override
-            public void validate(String jsonOutput) {
-                JsonObject cont1 = resolveCont1(jsonOutput);
-                assertNotNull(cont1);
-
-                JsonArray lst12 = childArray(cont1, "complexjson:lst12","lst12");
-                assertNotNull(lst12);
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, unkeyedNodeInContainer);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        assertNotNull(cont1);
 
-                Iterator<JsonElement> iterator = lst12.iterator();
-                assertTrue(iterator.hasNext());
-                JsonElement lst12Entry1Raw = iterator.next();
-                assertFalse(iterator.hasNext());
+        final JsonArray lst12 = childArray(cont1, "complexjson:lst12", "lst12");
+        assertNotNull(lst12);
 
-                assertTrue(lst12Entry1Raw instanceof JsonObject);
-                JsonObject lst12Entry1 = (JsonObject)lst12Entry1Raw;
-                JsonPrimitive lf121 = childPrimitive(lst12Entry1, "complexjson:lf121", "lf121");
-                assertNotNull(lf121);
+        final Iterator<JsonElement> iterator = lst12.iterator();
+        assertTrue(iterator.hasNext());
+        final JsonElement lst12Entry1Raw = iterator.next();
+        assertFalse(iterator.hasNext());
 
-                assertEquals("lf121 value",lf121.getAsString());
+        assertTrue(lst12Entry1Raw instanceof JsonObject);
+        final JsonObject lst12Entry1 = (JsonObject) lst12Entry1Raw;
+        final JsonPrimitive lf121 = childPrimitive(lst12Entry1, "complexjson:lf121", "lf121");
+        assertNotNull(lf121);
 
-            }
-        }.validate(jsonOutput);
+        assertEquals("lf121 value", lf121.getAsString());
+    }
 
+    @Test
+    public void emptyTypeTest() throws IOException, URISyntaxException {
+        final StringWriter writer = new StringWriter();
+        final ContainerNode emptyStructure = Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(CONT_1))
+                .addChild(ImmutableNodes.leafNode(EMPTY_LEAF, Empty.getInstance())).build();
+        final String jsonOutput = normalizedNodeToJsonStreamTransformation(writer, emptyStructure);
+        final JsonObject cont1 = resolveCont1(jsonOutput);
+        final JsonElement emptyObj = cont1.get("empty");
+        assertNotNull(emptyObj);
+        assertTrue(emptyObj instanceof JsonArray);
+        assertEquals(1, emptyObj.getAsJsonArray().size());
+        assertTrue(emptyObj.getAsJsonArray().get(0) instanceof JsonNull);
     }
 
-    private String normalizedNodeToJsonStreamTransformation(final Writer writer,
+    private static String normalizedNodeToJsonStreamTransformation(final Writer writer,
             final NormalizedNode<?, ?> inputStructure) throws IOException {
 
-        final NormalizedNodeStreamWriter jsonStream = JSONNormalizedNodeStreamWriter.create(schemaContext, writer, 2);
+        final NormalizedNodeStreamWriter jsonStream = JSONNormalizedNodeStreamWriter.createExclusiveWriter(
+            JSONCodecFactory.getShared(schemaContext), SchemaPath.ROOT, null,
+            JsonWriterFactory.createJsonWriter(writer, 2));
         final NormalizedNodeWriter nodeWriter = NormalizedNodeWriter.forStreamWriter(jsonStream);
         nodeWriter.write(inputStructure);
 
         nodeWriter.close();
         return writer.toString();
     }
-
 }