util/src/test/java/org/apache/directory/api/util/FileUtilsTest.java

/*
 *   Licensed to the Apache Software Foundation (ASF) under one
 *   or more contributor license agreements.  See the NOTICE file
 *   distributed with this work for additional information
 *   regarding copyright ownership.  The ASF licenses this file
 *   to you 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
 *
 *     https://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.apache.directory.api.util;


import static org.junit.jupiter.api.Assertions.assertEquals;

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

/**
 * Tests for FileUtils.
 *
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
public class FileUtilsTest
{
    private  Path tmpFolder;
    
    @BeforeEach
    public void init() throws IOException
    {
        tmpFolder = Files.createTempDirectory( FileUtilsTest.class.getSimpleName() );
    }
    
    
    @AfterEach
    public void cleanup()
    {
        FileUtils.deleteQuietly( tmpFolder.toFile() );
    }


    @Test
    public void testOpenOutputStreamAppendToNonExistingFileInNonExistingFolder() throws Exception
    {
        File nonExistingFile = new File( tmpFolder.toFile(),
            "testOpenOutputStreamAppendToNonExistingFileInNonExistingFolder/testOpenOutputStreamAppendToNonExistingFileInNonExistingFolder" );

        OutputStream os1 = FileUtils.openOutputStream( nonExistingFile, true );
        os1.write( 'a' );
        os1.write( 'b' );
        os1.write( 'c' );
        os1.close();

        OutputStream os2 = FileUtils.openOutputStream( nonExistingFile, true );
        os2.write( 'x' );
        os2.write( 'y' );
        os2.write( 'z' );
        os2.close();

        String content = FileUtils.readFileToString( nonExistingFile, StandardCharsets.UTF_8 );

        assertEquals( "abcxyz", content );
    }


    @Test
    public void testOpenOutputStreamAppendToExistingFile() throws Exception
    {
        File existingFile = new File( tmpFolder.toFile(), "testOpenOutputStreamAppendToExistingFile" );
        FileUtils.writeStringToFile( existingFile, "abc", StandardCharsets.UTF_8, false );

        OutputStream os = FileUtils.openOutputStream( existingFile, true );
        os.write( 'x' );
        os.write( 'y' );
        os.write( 'z' );
        os.close();

        String content = FileUtils.readFileToString( existingFile, StandardCharsets.UTF_8 );

        assertEquals( "abcxyz", content );
    }


    @Test
    public void testOpenOutputStreamNotAppendToNonExistingFile() throws Exception
    {
        File nonExistingFile = new File( tmpFolder.toFile(),
            "testOpenOutputStreamNotAppendToNonExistingFile/testOpenOutputStreamNotAppendToNonExistingFile" );

        OutputStream os1 = FileUtils.openOutputStream( nonExistingFile, false );
        os1.write( 'a' );
        os1.write( 'b' );
        os1.write( 'c' );
        os1.close();

        OutputStream os2 = FileUtils.openOutputStream( nonExistingFile, false );
        os2.write( 'x' );
        os2.write( 'y' );
        os2.write( 'z' );
        os2.close();

        String content = FileUtils.readFileToString( nonExistingFile, StandardCharsets.UTF_8 );

        assertEquals( "xyz", content );
    }


    @Test
    public void testOpenOutputStreamNotAppendToExistingFile() throws Exception
    {
        File existingFile = new File( tmpFolder.toFile(), "testOpenOutputStreamNotAppendToExistingFile" );
        FileUtils.writeStringToFile( existingFile, "abc", StandardCharsets.UTF_8, false );

        OutputStream os = FileUtils.openOutputStream( existingFile, false );
        os.write( 'x' );
        os.write( 'y' );
        os.write( 'z' );
        os.close();

        String content = FileUtils.readFileToString( existingFile, StandardCharsets.UTF_8 );

        assertEquals( "xyz", content );
    }
}