[ONOS-3892,3895,3882,3883,3896]Unit test of yang container, list, leaf, leaf-list parser

Change-Id: Iae040d9d354e012584db8adc0aa7ff1ea4c099a0
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/MandatoryListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/MandatoryListenerTest.java
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+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/MandatoryListenerTest.java
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+/*
+ * Copyright 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 org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.datamodel.YangNodeType;
+import org.onosproject.yangutils.datamodel.YangModule;
+import org.onosproject.yangutils.datamodel.YangLeaf;
+import org.onosproject.yangutils.parser.exceptions.ParserException;
+import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
+
+import java.io.IOException;
+import java.util.ListIterator;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.core.Is.is;
+
+/**
+ * Test case for mandatory listener.
+ */
+public class MandatoryListenerTest {
+
+    @Rule
+    public ExpectedException thrown = ExpectedException.none();
+
+    private final YangUtilsParserManager manager = new YangUtilsParserManager();
+
+    /**
+     * Checks valid mandatory with value true statement.
+     */
+    @Test
+    public void processMandatoryTrue() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/MandatoryTrue.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"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        // Check whether the mandatory value is set correctly.
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.isMandatory(), is(true));
+    }
+
+    /**
+     * Checks valid mandatory with value false statement.
+     */
+    @Test
+    public void processMandatoryFalse() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/MandatoryFalse.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"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        // Check whether the mandatory value is set correctly.
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.isMandatory(), is(false));
+    }
+
+    /**
+     * Checks default value of mandatory statement.
+     */
+    @Test
+    public void processMandatoryDefaultValue() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/MandatoryDefaultValue.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"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        // Check whether the mandatory value is set correctly.
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.isMandatory(), is(false));
+    }
+
+    /**
+     * Checks invalid of mandatory statement and expects exception.
+     */
+    @Test
+    public void processMandatoryEmptyStatement() throws IOException, ParserException {
+        thrown.expect(ParserException.class);
+        thrown.expectMessage("missing {'false', 'true'} at ';'");
+        YangNode node = manager.getDataModel("src/test/resources/MandatoryEmptyStatement.yang");
+    }
+
+    /**
+     * Checks invalid mandatory statement(without statement end) and expects exception.
+     */
+    @Test
+    public void processMandatoryWithoutStatementEnd() throws IOException, ParserException {
+        thrown.expect(ParserException.class);
+        thrown.expectMessage("missing ';' at '}'");
+        YangNode node = manager.getDataModel("src/test/resources/MandatoryWithoutStatementEnd.yang");
+    }
+
+    /**
+     * Checks mandatory statement as sub-statement of module and expects exception.
+     */
+    @Test
+    public void processModuleSubStatementMandatory() throws IOException, ParserException {
+        thrown.expect(ParserException.class);
+        thrown.expectMessage("mismatched input 'mandatory' expecting {'augment', 'choice', 'contact', 'container'," +
+                " 'description', 'extension', 'deviation', 'feature', 'grouping', 'identity', 'import', 'include'," +
+                " 'leaf', 'leaf-list', 'list', 'namespace', 'notification', 'organization', 'prefix', 'reference'," +
+                " 'revision', 'rpc', 'typedef', 'uses', 'yang-version', '}'}");
+        YangNode node = manager.getDataModel("src/test/resources/ModuleSubStatementMandatory.yang");
+    }
+}
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