/*
 * 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
 *
 *      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.apache.pdfbox.examples.pdmodel;

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

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

/**
 *
 * @author Tilman Hausherr
 */
class TestEmbeddedFiles
{
    private static final String OUTPUT_DIR = "target/test-output";

    @BeforeAll
    static void setUp()
    {
        new File(OUTPUT_DIR).mkdirs();
    }

    /**
     * Very basic test of embedding and extracting an attachment.
     *
     * @throws IOException 
     */
    @Test
    void testEmbeddedFiles() throws IOException
    {
        String outputFile = OUTPUT_DIR + "/EmbeddedFile.pdf";
        String embeddedFile = OUTPUT_DIR + "/Test.txt";

        new File(outputFile).delete();
        new File(embeddedFile).delete();
        String[] args = new String[] { outputFile };
        EmbeddedFiles.main(args);
        ExtractEmbeddedFiles.main(args);
        byte[] bytes = Files.readAllBytes(Paths.get(embeddedFile));
        String content = new String(bytes, StandardCharsets.US_ASCII);
        Assertions.assertEquals("This is the contents of the embedded file", content);
        new File(embeddedFile).delete();
        new File(outputFile).delete();
    }

    /**
     * Test that the correct attachments are extracted from a portable collection.
     *
     * @throws IOException 
     */
    @Test
    void testExtractEmbeddedFiles() throws IOException
    {
        String collectionFilename = OUTPUT_DIR + "/PortableCollection.pdf";
        String attachment1Filename = OUTPUT_DIR + "/Test1.txt";
        String attachment2Filename = OUTPUT_DIR + "/Test2.txt";
        String[] args = new String[] { collectionFilename };
        CreatePortableCollection.main(args);
        ExtractEmbeddedFiles.main(args);
        byte[] ba1 = Files.readAllBytes(new File(attachment1Filename).toPath());
        byte[] ba2 = Files.readAllBytes(new File(attachment2Filename).toPath());
        String s1 = new String(ba1, StandardCharsets.US_ASCII);
        String s2 = new String(ba2, StandardCharsets.US_ASCII);
        assertEquals("This is the contents of the first embedded file", s1);
        assertEquals("This is the contents of the second embedded file", s2);
        Files.delete(Paths.get(collectionFilename));
        Files.delete(Paths.get(attachment1Filename));
        Files.delete(Paths.get(attachment2Filename));
    }
}