src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFPictureData.java

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   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
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       http://www.apache.org/licenses/LICENSE-2.0

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   distributed under the License is distributed on an "AS IS" BASIS,
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   See the License for the specific language governing permissions and
   limitations under the License.
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package org.apache.poi.xssf.usermodel;

import static org.junit.Assert.assertArrayEquals;

import java.util.List;

import junit.framework.TestCase;

import org.apache.poi.xssf.XSSFTestDataSamples;

/**
 * @author Yegor Kozlov
 */
public final class TestXSSFPictureData extends TestCase {
    public void testRead(){
        XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("WithDrawing.xlsx");
        List<XSSFPictureData> pictures = wb.getAllPictures();
        //wb.getAllPictures() should return the same instance across multiple calls
        assertSame(pictures, wb.getAllPictures());

        assertEquals(5, pictures.size());
        String[] ext = {"jpeg", "emf", "png", "emf", "wmf"};
        String[] mimetype = {"image/jpeg", "image/x-emf", "image/png", "image/x-emf", "image/x-wmf"};
        for (int i = 0; i < pictures.size(); i++) {
            assertEquals(ext[i], pictures.get(i).suggestFileExtension());
            assertEquals(mimetype[i], pictures.get(i).getMimeType());
        }

        int num = pictures.size();

        byte[] pictureData = {0xA, 0xB, 0XC, 0xD, 0xE, 0xF};

        int idx = wb.addPicture(pictureData, XSSFWorkbook.PICTURE_TYPE_JPEG);
        assertEquals(num + 1, pictures.size());
        //idx is 0-based index in the #pictures array
        assertEquals(pictures.size() - 1, idx);
        XSSFPictureData pict = pictures.get(idx);
        assertEquals("jpeg", pict.suggestFileExtension());
        assertArrayEquals(pictureData, pict.getData());
    }

    public void testNew(){
        XSSFWorkbook wb = new XSSFWorkbook();
        XSSFSheet sheet = wb.createSheet();
        XSSFDrawing drawing = sheet.createDrawingPatriarch();

        byte[] jpegData = "test jpeg data".getBytes();
        byte[] wmfData =  "test wmf data".getBytes();
        byte[] pngData =  "test png data".getBytes();

        List<XSSFPictureData> pictures = wb.getAllPictures();
        assertEquals(0, pictures.size());

        int jpegIdx = wb.addPicture(jpegData, XSSFWorkbook.PICTURE_TYPE_JPEG);
        assertEquals(1, pictures.size());
        assertEquals("jpeg", pictures.get(jpegIdx).suggestFileExtension());
        assertArrayEquals(jpegData, pictures.get(jpegIdx).getData());

        int wmfIdx = wb.addPicture(wmfData, XSSFWorkbook.PICTURE_TYPE_WMF);
        assertEquals(2, pictures.size());
        assertEquals("wmf", pictures.get(wmfIdx).suggestFileExtension());
        assertArrayEquals(wmfData, pictures.get(wmfIdx).getData());

        int pngIdx = wb.addPicture(pngData, XSSFWorkbook.PICTURE_TYPE_PNG);
        assertEquals(3, pictures.size());
        assertEquals("png", pictures.get(pngIdx).suggestFileExtension());
        assertArrayEquals(pngData, pictures.get(pngIdx).getData());

        //TODO finish usermodel API for XSSFPicture
        XSSFPicture p1 = drawing.createPicture(new XSSFClientAnchor(), jpegIdx);
        assertNotNull(p1);
        XSSFPicture p2 = drawing.createPicture(new XSSFClientAnchor(), wmfIdx);
        assertNotNull(p2);
        XSSFPicture p3 = drawing.createPicture(new XSSFClientAnchor(), pngIdx);
        assertNotNull(p3);

        //check that the added pictures are accessible after write
        wb = XSSFTestDataSamples.writeOutAndReadBack(wb);
        List<XSSFPictureData> pictures2 = wb.getAllPictures();
        assertEquals(3, pictures2.size());

        assertEquals("jpeg", pictures2.get(jpegIdx).suggestFileExtension());
        assertArrayEquals(jpegData, pictures2.get(jpegIdx).getData());

        assertEquals("wmf", pictures2.get(wmfIdx).suggestFileExtension());
        assertArrayEquals(wmfData, pictures2.get(wmfIdx).getData());

        assertEquals("png", pictures2.get(pngIdx).suggestFileExtension());
        assertArrayEquals(pngData, pictures2.get(pngIdx).getData());

    }

    /**
     * Bug 53568:  XSSFPicture.getPictureData() can return null.
     */
    public void test53568(){
        XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("53568.xlsx");
        List<XSSFPictureData> pictures = wb.getAllPictures();
        assertNotNull(pictures);
        assertEquals(4, pictures.size());

        XSSFSheet sheet1 = wb.getSheetAt(0);
        List<XSSFShape> shapes1 = sheet1.createDrawingPatriarch().getShapes();
        assertNotNull(shapes1);
        assertEquals(5, shapes1.size());
        
        for(int i = 0; i < wb.getNumberOfSheets(); i++){
            XSSFSheet sheet = wb.getSheetAt(i);
            XSSFDrawing drawing = sheet.createDrawingPatriarch();
            for(XSSFShape shape : drawing.getShapes()){
                if(shape instanceof XSSFPicture){
                    XSSFPicture pic = (XSSFPicture)shape;
                    XSSFPictureData picData = pic.getPictureData();
                    assertNotNull(picData);
                }
            }
        }

    }
}