[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/ContainerListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListenerTest.java
new file mode 100644
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+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListenerTest.java
@@ -0,0 +1,197 @@
+/*
+ * 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.YangLeaf;
+import org.onosproject.yangutils.datamodel.YangModule;
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.datamodel.YangNodeType;
+import org.onosproject.yangutils.datamodel.YangDataTypes;
+import org.onosproject.yangutils.datamodel.YangStatusType;
+import org.onosproject.yangutils.datamodel.YangContainer;
+import org.onosproject.yangutils.datamodel.YangList;
+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 cases for testing container listener.
+ */
+public class ContainerListenerTest {
+
+    @Rule
+    public ExpectedException thrown = ExpectedException.none();
+
+    private final YangUtilsParserManager manager = new YangUtilsParserManager();
+
+    /**
+     * Checks container statement as sub-statement of module.
+     */
+    @Test
+    public void processModuleSubStatementContainer() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/ModuleSubStatementContainer.yang");
+
+        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"));
+
+        // Check whether the container is child of module
+        YangContainer yangContainer = (YangContainer) yangNode.getChild();
+        assertThat(yangContainer.getName(), is("valid"));
+    }
+
+    /**
+     * Checks container statement as sub-statement of container.
+     */
+    @Test
+    public void processContainerSubStatementContainer() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/ContainerSubStatementContainer.yang");
+
+        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"));
+
+        // Check whether the container is child of module
+        YangContainer yangContainer = (YangContainer) yangNode.getChild();
+        assertThat(yangContainer.getName(), is("ospf"));
+
+        // Check whether the container is child of container
+        YangContainer yangContainer1 = (YangContainer) yangContainer.getChild();
+        assertThat(yangContainer1.getName(), is("valid"));
+    }
+
+    /**
+     * Checks container statement as sub-statement of list.
+     */
+    @Test
+    public void processListSubStatementContainer() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/ListSubStatementContainer.yang");
+
+        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"));
+
+        // Check whether the list is child of module
+        YangList yangList1 = (YangList) yangNode.getChild();
+        assertThat(yangList1.getName(), is("ospf"));
+
+        ListIterator<String> keyList = yangList1.getKeyList().listIterator();
+        assertThat(keyList.next(), is("process-id"));
+
+        // Check whether the list is child of list
+        YangContainer yangContainer = (YangContainer) yangList1.getChild();
+        assertThat(yangContainer.getName(), is("interface"));
+    }
+
+    /**
+     * Checks container with all its sub-statements.
+     */
+    @Test
+    public void processContainerSubStatements() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/ContainerSubStatements.yang");
+
+        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"));
+
+        // Check whether the container is child of module
+        YangContainer yangContainer = (YangContainer) yangNode.getChild();
+
+        // Check whether container properties as set correctly.
+        assertThat(yangContainer.getName(), is("ospf"));
+
+        assertThat(yangContainer.isConfig(), is(true));
+        assertThat(yangContainer.getPresence(), is("\"ospf logs\""));
+        assertThat(yangContainer.getDescription(), is("\"container description\""));
+        assertThat(yangContainer.getStatus(), is(YangStatusType.CURRENT));
+        assertThat(yangContainer.getReference(), is("\"container reference\""));
+
+        // Check whether leaf properties as set correctly.
+        ListIterator<YangLeaf> leafIterator = yangContainer.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
+        assertThat(leafInfo.getUnits(), is("\"seconds\""));
+        assertThat(leafInfo.getStatus(), is(YangStatusType.CURRENT));
+        assertThat(leafInfo.getReference(), is("\"RFC 6020\""));
+    }
+
+    /**
+     * Checks cardinality of sub-statements of container.
+     */
+    @Test
+    public void processContainerSubStatementCardinality() throws IOException, ParserException {
+        thrown.expect(ParserException.class);
+        thrown.expectMessage("Internal parser error detected: Invalid cardinality in reference before processing.");
+        YangNode node = manager.getDataModel("src/test/resources/ContainerSubStatementCardinality.yang");
+    }
+
+    /**
+     * Checks container as root node.
+     */
+    @Test
+    public void processContainerRootNode() throws IOException, ParserException {
+        thrown.expect(ParserException.class);
+        thrown.expectMessage("no viable alternative at input 'container'");
+        YangNode node = manager.getDataModel("src/test/resources/ContainerRootNode.yang");
+    }
+
+    /**
+     * Checks invalid identifier for container statement.
+     */
+    @Test
+    public void processContainerInvalidIdentifier() throws IOException, ParserException {
+        thrown.expect(ParserException.class);
+        thrown.expectMessage("mismatched input '1valid' expecting IDENTIFIER");
+        YangNode node = manager.getDataModel("src/test/resources/ContainerInvalidIdentifier.yang");
+    }
+}
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