/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2017 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, Kevin Day, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import java.io.ByteArrayOutputStream;

import org.junit.Test;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.exceptions.IllegalPdfSyntaxException;

public class UnbalancedOperatorsTest {

    private Document document;
    private PdfWriter writer;
    
    private void initializeDocument() throws DocumentException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        document = new Document();
        writer = PdfWriter.getInstance(document, baos);
        document.open();        
    }
    
    @Test
    public void testBasicDocument() throws Exception {
        initializeDocument();
        writer.getDirectContent().saveState();
        document.add(new Paragraph("Hello World"));
        writer.getDirectContent().restoreState();
        document.close();
    }

    @Test
    public void testNewPage() throws Exception {
        initializeDocument();
        writer.getDirectContent().saveState();
        document.add(new Paragraph("Hello World"));
        writer.getDirectContent().restoreState();
        document.newPage();
        document.add(new Paragraph("Hello World"));
        document.close();
    }
    
    @Test(expected=IllegalPdfSyntaxException.class)
    public void testUnbalancedRestoreState() throws Exception {
        initializeDocument();
        document.add(new Paragraph("Hello World"));
        writer.getDirectContent().restoreState();
        document.close();
    }

    @Test(expected=IllegalPdfSyntaxException.class)
    public void testUnbalancedSaveStateOnClose() throws Exception {
        initializeDocument();
        writer.getDirectContent().saveState();
        document.add(new Paragraph("Hello World"));
        document.close();
    }

    @Test(expected=IllegalPdfSyntaxException.class)
    public void testUnbalancedSaveStateOnNewPage() throws Exception {
        initializeDocument();
        writer.getDirectContent().saveState();
        document.add(new Paragraph("Hello World"));
        document.newPage();
        document.add(new Paragraph("Hello World"));
        document.close();
    }

}