[ONOS-3898/4069] Yang Utils Extension to support RPC/Notification/Choice/Case/Union

Change-Id: I405852caff3464719e8e586fa8e9ae9b6ed043ff
diff --git a/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ChoiceListenerTest.java b/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ChoiceListenerTest.java
new file mode 100644
index 0000000..68400b9
--- /dev/null
+++ b/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ChoiceListenerTest.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2014-2016 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.yangutils.parser.impl.listeners;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.core.Is.is;
+import org.junit.Test;
+import org.onosproject.yangutils.datamodel.YangChoice;
+import org.onosproject.yangutils.datamodel.YangContainer;
+import org.onosproject.yangutils.datamodel.YangModule;
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.datamodel.YangNodeType;
+import org.onosproject.yangutils.parser.exceptions.ParserException;
+import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
+
+import java.io.IOException;
+
+/**
+ * Test cases for choice listener.
+ */
+public class ChoiceListenerTest {
+
+    private final YangUtilsParserManager manager = new YangUtilsParserManager();
+
+    /**
+     * Checks choice statement without body.
+     */
+    @Test
+    public void processChoiceStatementWithoutBody() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/ChoiceStatementWithoutBody.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer = (YangContainer) yangNode.getChild();
+        assertThat(yangContainer.getName(), is("food"));
+
+        YangChoice yangChoice = (YangChoice) yangContainer.getChild();
+        assertThat(yangChoice.getName(), is("snack"));
+    }
+
+    /**
+     * Checks choice statement with stmt end.
+     */
+    @Test
+    public void processChoiceStatementWithStmtend() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/ChoiceStatementWithStmtend.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer = (YangContainer) yangNode.getChild();
+        assertThat(yangContainer.getName(), is("food"));
+
+        YangChoice yangChoice = (YangChoice) yangContainer.getChild();
+        assertThat(yangChoice.getName(), is("snack"));
+    }
+
+    /**
+     * Checks choice statement duplicate entry.
+     */
+    @Test(expected = ParserException.class)
+    public void processChoiceStatementDuplicateEntry() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/ChoiceStatementDuplicateEntry.yang");
+    }
+
+    /**
+     * Checks choice statement with same entry in two different container.
+     */
+    @Test
+    public void processChoiceStatementSameEntryDifferentContainer() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/ChoiceStatementSameEntryDifferentContainer.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer1 = (YangContainer) yangNode.getChild();
+        assertThat(yangContainer1.getName(), is("food1"));
+
+        YangChoice yangChoice1 = (YangChoice) yangContainer1.getChild();
+        assertThat(yangChoice1.getName(), is("snack"));
+
+        YangContainer yangContainer2 = (YangContainer) yangNode.getChild().getNextSibling();
+        assertThat(yangContainer2.getName(), is("food2"));
+
+        YangChoice yangChoice2 = (YangChoice) yangContainer2.getChild();
+        assertThat(yangChoice2.getName(), is("snack"));
+    }
+}