public void testAddPicture(){
XWPFDocument doc = XWPFTestDataSamples.openSampleDocument("sample.docx");
byte[] jpeg = "This is a jpeg".getBytes();
try {
int jpegNum = doc.addPicture(jpeg, XWPFDocument.PICTURE_TYPE_JPEG);
byte[] newJpeg = doc.getAllPictures().get(jpegNum).getData();
assertEquals(newJpeg.length, jpeg.length);
for(int i = 0 ; i < jpeg.length; i++){
assertEquals(newJpeg[i], jpeg[i]);
}