diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/SubModuleListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/SubModuleListenerTest.java
new file mode 100644
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--- /dev/null
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/SubModuleListenerTest.java
@@ -0,0 +1,129 @@
+/*
+ * 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.Test;
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.datamodel.YangNodeType;
+import org.onosproject.yangutils.datamodel.YangSubModule;
+import org.onosproject.yangutils.parser.exceptions.ParserException;
+import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
+
+import java.io.IOException;
+
+import static org.hamcrest.core.Is.is;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Test cases for testing submodule listener functionality.
+ */
+public class SubModuleListenerTest {
+
+    private final YangUtilsParserManager manager = new YangUtilsParserManager();
+
+    /**
+     * Checks if the sub module listeners updates the data model tree.
+     */
+    @Test
+    public void processSubModuleValidEntry() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/SubModuleValidEntry.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangSubModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.SUB_MODULE_NODE));
+
+        YangSubModule yangNode = (YangSubModule) node;
+        // Check whether the module name is set correctly.
+        assertThat(yangNode.getName(), is("Test"));
+        // Checks for the version value in data model tree.
+        assertThat(yangNode.getVersion(), is((byte) 1));
+        // Checks identifier of belongsto in data model tree.
+        assertThat(yangNode.getBelongsTo().getBelongsToModuleName(), is("ONOS"));
+        // Checks for the version value in data model tree.
+        assertThat(yangNode.getBelongsTo().getPrefix(), is("On1"));
+    }
+
+    /**
+     * Checks if the yang version and belongs to can come in any order in sub
+     * module.
+     */
+    @Test
+    public void processSubModuleOrder() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/SubModuleOrder.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangSubModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.SUB_MODULE_NODE));
+
+        YangSubModule yangNode = (YangSubModule) node;
+        // Check whether the module name is set correctly.
+        assertThat(yangNode.getName(), is("Test"));
+        // Checks for the version value in data model tree.
+        assertThat(yangNode.getVersion(), is((byte) 1));
+        // Checks identifier of belongsto in data model tree.
+        assertThat(yangNode.getBelongsTo().getBelongsToModuleName(), is("ONOS"));
+        // Checks for the version value in data model tree.
+        assertThat(yangNode.getBelongsTo().getPrefix(), is("On1"));
+    }
+
+    /**
+     * Checks if yang version is optional.
+     */
+    @Test
+    public void processSubModuleWithoutVersion() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/SubModuleWithoutVersion.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangSubModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.SUB_MODULE_NODE));
+
+        YangSubModule yangNode = (YangSubModule) node;
+        // Check whether the module name is set correctly.
+        assertThat(yangNode.getName(), is("Test"));
+        // Checks identifier of belongsto in data model tree.
+        assertThat(yangNode.getBelongsTo().getBelongsToModuleName(), is("ONOS"));
+        // Checks for the version value in data model tree.
+        assertThat(yangNode.getBelongsTo().getPrefix(), is("On1"));
+    }
+
+    /**
+     * Checks if sub module name is correct.
+     */
+    @Test(expected = ParserException.class)
+    public void processSubModuleInvalidName() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/SubModuleInvalidName.yang");
+    }
+
+    /**
+     * Checks if sub module has invalid modules construct eg namespace.
+     */
+    @Test(expected = ParserException.class)
+    public void processSubModuleWithNamespace() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/SubModuleWithNamespace.yang");
+    }
+}
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