If your path has spaces in it then the worldimagereader tests fail as they can not find the data file. This is caused by over zelous handling of file urls - (probably as an optimisation) urls with a file protocol are converted to files. This conversion breaks when there are encoded spaces in the url as %20 does not get converted back to a space.
The simple fix is to remove the optimising code in WorldImageReader.readSourceImage
// if (((URL) source).getProtocol() == "file")
// RandomAccessFile rFile = new RandomAccessFile(((URL) source)
// .getFile(), "r");
// channel = rFile.getChannel();
// stream = new FileChannelImageInputStream(channel);
and in the constructor
// if (((URL) source).getProtocol().compareToIgnoreCase("file") == 0)
// this.source = new File(((URL) source).getPath());
This fixes the problem on my machine.
I guess the longer fix would be to revisit the decoding of the url to a file name.