diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/utils/io/impl/YangIoUtilsTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/utils/io/impl/YangIoUtilsTest.java
new file mode 100644
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+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/utils/io/impl/YangIoUtilsTest.java
@@ -0,0 +1,149 @@
+/*
+ * 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.utils.io.impl;
+
+import org.junit.Test;
+import org.junit.Rule;
+import org.junit.rules.ExpectedException;
+import org.onosproject.yangutils.utils.UtilConstants;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.apache.maven.project.MavenProject;
+import org.sonatype.plexus.build.incremental.BuildContext;
+import org.sonatype.plexus.build.incremental.DefaultBuildContext;
+
+import org.slf4j.Logger;
+import static org.slf4j.LoggerFactory.getLogger;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertNotNull;
+import static org.hamcrest.core.Is.is;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ * Unit tests for adding package-info, creating directories, cleaning the folder and to add sources.
+ */
+public final class YangIoUtilsTest {
+
+    public static String baseDir = "target/UnitTestCase";
+
+    public static String createPath = baseDir + File.separator + "dir1/dir2/dir3/dir4/";
+
+    private final Logger log = getLogger(getClass());
+
+    @Rule
+    public ExpectedException thrown = ExpectedException.none();
+
+    /**
+     * This test case checks whether the package-info file is created.
+     */
+    @Test
+    public void addPackageInfoTest() throws IOException {
+
+        File dirPath = new File(createPath);
+        dirPath.mkdirs();
+        CopyrightHeader.parseCopyrightHeader();
+        YangIoUtils.addPackageInfo(dirPath, "check1", createPath);
+        File filePath = new File(dirPath + File.separator + "package-info.java");
+        assertThat(filePath.isFile(), is(true));
+    }
+
+    /**
+     * This test case checks whether the package-info file is created when invalid path is given.
+     */
+    @Test
+    public void addPackageInfoWithEmptyPathTest() throws IOException {
+
+        File dirPath = new File("");
+        thrown.expect(IOException.class);
+        thrown.expectMessage("Exception occured while creating package info file.");
+        YangIoUtils.addPackageInfo(dirPath, "check1", createPath);
+        File filePath1 = new File(dirPath + File.separator + "package-info.java");
+        assertThat(filePath1.isFile(), is(false));
+    }
+
+    /**
+     * A private constructor is tested.
+     *
+     * @throws SecurityException if any security violation is observed.
+     * @throws NoSuchMethodException if when the method is not found.
+     * @throws IllegalArgumentException if there is illegal argument found.
+     * @throws InstantiationException if instantiation is provoked for the private constructor.
+     * @throws IllegalAccessException if instance is provoked or a method is provoked.
+     * @throws InvocationTargetException when an exception occurs by the method or constructor.
+     */
+    @Test
+    public void callPrivateConstructors() throws SecurityException, NoSuchMethodException, IllegalArgumentException,
+    InstantiationException, IllegalAccessException, InvocationTargetException {
+
+        Class<?>[] classesToConstruct = {YangIoUtils.class };
+        for (Class<?> clazz : classesToConstruct) {
+            Constructor<?> constructor = clazz.getDeclaredConstructor();
+            constructor.setAccessible(true);
+            assertNotNull(constructor.newInstance());
+        }
+    }
+
+    /**
+     * This test case checks if the directory is cleaned.
+     */
+    @Test
+    public void cleanGeneratedDirTest() throws IOException {
+
+        File baseDirPath = new File(baseDir);
+        File createNewDir = new File(baseDir + File.separator + UtilConstants.YANG_GEN_DIR);
+        createNewDir.mkdirs();
+        File createFile = new File(createNewDir + File.separator + "check1.java");
+        createFile.createNewFile();
+        YangIoUtils.clean(baseDirPath.getAbsolutePath());
+    }
+
+    /**
+     * This test case checks the cleaning method when an invalid path is provided.
+     */
+    @Test
+    public void cleanWithInvalidDirTest() throws IOException {
+
+        File baseDirPath = new File(baseDir + "invalid");
+        YangIoUtils.clean(baseDirPath.getAbsolutePath());
+    }
+
+    /**
+     * This test case tests whether the directories are getting created.
+     */
+    @Test
+    public void createDirectoryTest() {
+
+        File dirPath = YangIoUtils.createDirectories(createPath);
+        assertThat(dirPath.isDirectory(), is(true));
+    }
+
+    /**
+     * This testcase checks whether the source is getting added.
+     */
+    @Test
+    public void testForAddSource() {
+
+        MavenProject project = new MavenProject();
+        BuildContext context = new DefaultBuildContext();
+        File sourceDir = new File(baseDir + File.separator + "yang");
+        sourceDir.mkdirs();
+        YangIoUtils.addToSource(sourceDir.toString(), project, context);
+    }
+}
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