BMP error : net.sf.jmimemagic.MagicMatchNotFoundException: null

[ahll]

I get a byte array from a url, then test it with magic class. And it has thrown a MagicMatchNotFoundException.

Code:

public static String getMimeType(byte[] bytes) throws MagicParseException, MagicMatchNotFoundException, MagicException {
Magic parser = new Magic();
MagicMatch match = parser.getMagicMatch(bytes);
return match.getMimeType();
}

Test code:

String bmpUrl = "https://raw.githubusercontent.com/arimus/jmimemagic/master/test_docs/test.bmp";

byte[] bmpFIle = IOUtils.toByteArray((new URL(bmpUrl)).openStream());
assertThat(FileHelper.getMimeType(bmpFIle)).isEqualTo("image/bmp");