CommandExecutorTest.java

/*******************************************************************************
 * ===========================================================
 * Ankush : Big Data Cluster Management Solution
 * ===========================================================
 * 
 * (C) Copyright 2014, by Impetus Technologies
 * 
 * This is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License (LGPL v3) as
 * published by the Free Software Foundation;
 * 
 * This software is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License 
 * along with this software; if not, write to the Free Software Foundation, 
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 ******************************************************************************/
package com.impetus.ankush.agent.utils;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import java.io.IOException;
import java.util.Date;

import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

/**
 * The class <code>CommandExecutorTest</code> contains tests for the class
 * <code>{@link CommandExecutor}</code>.
 * 
 * @author Hokam Chauhan
 */
public class CommandExecutorTest {

	/** The exception. */
	@Rule
	public ExpectedException exception = ExpectedException.none();

	/**
	 * Perform pre-test initialisation.
	 * 
	 * @throws Exception
	 *             if the initialisation fails for some reason
	 */
	@Before
	public void setUp() throws Exception {
	}

	/**
	 * Run the CommandExecutor() constructor test.
	 * 
	 * @throws Exception
	 *             the exception
	 */
	@Test
	public void testCommandExecutorObjectNotNull() throws Exception {
		CommandExecutor result = new CommandExecutor();
		assertNotNull(result);
	}

	/**
	 * Run the Result executeCommand(String) method test.
	 * 
	 * @throws Exception
	 *             the exception
	 */
	@Test
	public void testExecute_JPS_Command() throws Exception {
		String command = "jps";

		Result result = CommandExecutor.executeCommand(command);

		assertEquals(0, result.getExitVal());
		assertNotNull(result);
	}

	/**
	 * Run the Result executeCommand(String) method test.
	 * 
	 * @throws Exception
	 *             the exception
	 */
	@Test
	public void testExecute_LS_Command() throws Exception {
		String command = "ls";

		Result result = CommandExecutor.executeCommand(command);

		assertEquals(0, result.getExitVal());
		assertNotNull(result);
	}

	/**
	 * Run the Result executeCommand(String) method test.
	 * 
	 * @throws Exception
	 *             the exception
	 */
	@Test
	public void testExecute_ABCD_Command() throws Exception {
		String command = "abcd";

		exception.expect(IOException.class);
		Result result = CommandExecutor.executeCommand(command);

		assertEquals(0, result.getExitVal());
		assertNotNull(result);
	}

	/**
	 * Run the Result executeCommand(String) method test.
	 * 
	 * @throws Exception
	 *             the exception
	 */
	@Test
	public void testExecute_MkRemoveTestDir_Command() throws Exception {
		String dir = new Date().getTime() + "-test";
		String createCommand = "mkdir " + dir;

		Result result = CommandExecutor.executeCommand(createCommand);

		assertEquals(0, result.getExitVal());
		assertNotNull(result);

		String removeCommand = "rm -r " + dir;

		result = CommandExecutor.executeCommand(removeCommand);
		assertEquals(0, result.getExitVal());
		assertNotNull(result);
	}

	/**
	 * Run the Result executeCommand(String) method test.
	 * 
	 * @throws Exception
	 *             the exception
	 */
	@Test
	public void testExecute_Empty_Command() throws Exception {
		String command = "";

		exception.expect(java.lang.IllegalArgumentException.class);
		Result result = CommandExecutor.executeCommand(command);

		assertEquals(1, result.getExitVal());
		assertNotNull(result);
	}

	/**
	 * Run the Result executeCommand(String) method test.
	 * 
	 * @throws Exception
	 *             the exception
	 */
	@Test
	public void testExecute_Null_Command() throws Exception {
		String command = null;

		exception.expect(NullPointerException.class);
		Result result = CommandExecutor.executeCommand(command);

		assertEquals(1, result.getExitVal());
		assertNotNull(result);
	}

	/**
	 * Perform post-test clean-up.
	 * 
	 * @throws Exception
	 *             if the clean-up fails for some reason
	 */
	@After
	public void tearDown() throws Exception {
	}
}