/**
 * Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite 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 Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
 */
package org.evosuite.junit;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.evosuite.Properties;
import org.evosuite.classpath.ClassPathHandler;
import org.evosuite.runtime.sandbox.Sandbox;
import org.evosuite.testcase.TestCase;
import org.evosuite.testcase.TestChromosome;
import org.evosuite.testcase.factories.JUnitTestCarvedChromosomeFactory;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import com.examples.with.different.packagename.sandbox.OpenStream;

public class JUnitAnalyzerTest {

	//we use carver to simplify the creation of test case chromosomes

	private static final Properties.Criterion[] defaultCriterion = Properties.CRITERION;
	private static final String defaultSelectedJUnit = Properties.SELECTED_JUNIT;
	private static final int defaultSeedMutations = Properties.SEED_MUTATIONS;
	private static final double defaultSeedClone = Properties.SEED_CLONE;
	private static final boolean DEFAULT_VFS = Properties.VIRTUAL_FS; 
	private static final boolean DEFAULT_SANDBOX = Properties.SANDBOX; 
	private static final boolean DEFAULT_ASSERTS_FOR_EVO = Properties.ENABLE_ASSERTS_FOR_EVOSUITE;
	private static final boolean DEFAULT_SCAFFOLDING = Properties.TEST_SCAFFOLDING;
	
	private File file = new File(OpenStream.FILE_NAME);

	
	@Before
	public void init() {
		
		ClassPathHandler.getInstance().changeTargetCPtoTheSameAsEvoSuite();

		if(file.exists()){
			file.delete();
		}
		file.deleteOnExit();
	}

	@After
	public void reset(){
		Properties.CRITERION = defaultCriterion;
		Properties.SELECTED_JUNIT = defaultSelectedJUnit;
		Properties.SEED_MUTATIONS = defaultSeedMutations;
		Properties.SEED_CLONE = defaultSeedClone;
		Properties.VIRTUAL_FS = DEFAULT_VFS;	
		Properties.SANDBOX = DEFAULT_SANDBOX;
		Properties.ENABLE_ASSERTS_FOR_EVOSUITE = DEFAULT_ASSERTS_FOR_EVO;
		Properties.TEST_SCAFFOLDING = DEFAULT_SCAFFOLDING;
	}
	
	@Test 
	public void testSandboxIssue() throws Exception{

		//First, get a TestCase from a carved JUnit
		
		Properties.SELECTED_JUNIT = com.examples.with.different.packagename.sandbox.OpenStreamInATryCatch_FakeTestToCarve.class.getCanonicalName();
		Properties.TARGET_CLASS = com.examples.with.different.packagename.sandbox.OpenStreamInATryCatch.class.getCanonicalName();

		Properties.CRITERION = new Properties.Criterion[] { Properties.Criterion.BRANCH };
		Properties.SEED_MUTATIONS = 0;
		Properties.SEED_CLONE = 1;
		Properties.VIRTUAL_FS = false;		
		Properties.SANDBOX = true;
		Properties.ENABLE_ASSERTS_FOR_EVOSUITE = true; //needed for setLoggingForJUnit
		Properties.TEST_SCAFFOLDING = false;
		
		//FIXME
		Sandbox.initializeSecurityManagerForSUT();
		
		//file should never be created
		Assert.assertFalse(file.exists());

		JUnitTestCarvedChromosomeFactory factory = new JUnitTestCarvedChromosomeFactory(null);
		TestChromosome carved = factory.getChromosome();

		/*
		 * FIXME: issue with carver
		 */		
		Files.deleteIfExists(file.toPath());
		
		Assert.assertFalse(file.exists());

		Assert.assertNotNull(carved);
		
		TestCase test = carved.getTestCase();
		
		Assert.assertEquals("Should be: constructor, 1 variable and 1 method", 3, test.size());

		//Now that we have a test case, we check its execution after
		//recompiling it to JUnit, and see if sandbox kicks in
		
		List<TestCase> list = new ArrayList<TestCase>();
		list.add(test);
		
		Assert.assertFalse(file.exists());

		//NOTE: following order of checks reflects what is done
		// in EvoSuite after the search is finished
		
		System.out.println("\n COMPILATION CHECK \n");
		//first try to compile (which implies execution)
		JUnitAnalyzer.removeTestsThatDoNotCompile(list);
		Assert.assertEquals(1, list.size());
		Assert.assertFalse(file.exists()); 
		
		System.out.println("\n FIRST STABILITY CHECK \n");
		//try once
		JUnitAnalyzer.handleTestsThatAreUnstable(list);
		Assert.assertEquals(1, list.size());
		Assert.assertFalse(file.exists()); 		

		System.out.println("\n SECOND STABILITY CHECK \n");
		//try again
		JUnitAnalyzer.handleTestsThatAreUnstable(list);
		Assert.assertEquals(1, list.size());
		Assert.assertFalse(file.exists()); 		
		
		System.out.println("\n FINAL VERIFICATION \n");
		JUnitAnalyzer.verifyCompilationAndExecution(list);
		Assert.assertEquals(1, list.size());
		Assert.assertFalse(file.exists()); 			
	}
	
	@Test
	public void testCreationOfTmpDir() throws IOException{
		
		File dir = JUnitAnalyzer.createNewTmpDir();
		Assert.assertNotNull(dir);
		Assert.assertTrue(dir.exists());
		
		FileUtils.deleteDirectory(dir);
		Assert.assertFalse(dir.exists());
	}
	
	
}