public void testPngMaxData() throws EncodingException, DecodingException {
int maxLength = PngStegoImage.getMaxBytesEncodable(mCoverImage);
byte[] bytes = new byte[maxLength];
for (int i = 0; i < bytes.length; i++) {
bytes[i] = (byte) (i % 255);
}
PngStegoImage image = new PngStegoImage();
image.setImageBitmap(mCoverImage);
image.setEmbeddedData(bytes);
image.encode();
PngStegoImage decoder = new PngStegoImage();
decoder.setImageBytes(image.getImageBytes());
decoder.decode();
int bitnum = 8 * Constants.STEGO_HEADER_LENGTH;
for (int i = 0; i < bytes.length; i++) {
assertEquals(
String.format(
"Bytes length %d, Byte %d, Expected '%x' Actual '%x', bitnum is %d",
bytes.length, i, bytes[i] & 0xFF, decoder.getEmbeddedData()[i] & 0xFF, bitnum),
bytes[i],
decoder.getEmbeddedData()[i]);
bitnum += 8;
}
}
