File nonJpeg = new File("src/com/drew/imaging/exif/test/AllTests.java");
File nonJpeg = new File("src/com/drew/metadata/AllTests.java");
    public void testIsJpegWithNonJpegFile() throws Exception    {        File nonJpeg = new File("src/com/drew/imaging/exif/test/AllTests.java");        JpegSegmentReader segmentReader = new JpegSegmentReader(nonJpeg);        assertTrue("expect !isJpeg() for non-jpeg file", !segmentReader.isJpeg());    }