@Test
public void testInteroperabilityWithGZIPInputStream() throws Exception {
byte[] content;
try (FileInputStream fis = new FileInputStream(getFile("test3.xml"))) {
content = IOUtils.toByteArray(fis);
}
final ByteArrayOutputStream bout = new ByteArrayOutputStream();
final GzipParameters parameters = new GzipParameters();
parameters.setCompressionLevel(Deflater.BEST_COMPRESSION);
parameters.setOperatingSystem(3);
parameters.setFilename("test3.xml");
parameters.setComment("Test file");
parameters.setModificationTime(System.currentTimeMillis());
final GzipCompressorOutputStream out = new GzipCompressorOutputStream(bout, parameters);
out.write(content);
out.flush();
out.close();
final GZIPInputStream in = new GZIPInputStream(new ByteArrayInputStream(bout.toByteArray()));
final byte[] content2 = IOUtils.toByteArray(in);
Assert.assertArrayEquals("uncompressed content", content, content2);
}
private void testExtraFlags(final int compressionLevel, final int flag) throws Exception {
byte[] content;
try (FileInputStream fis = new FileInputStream(getFile("test3.xml"))) {
content = IOUtils.toByteArray(fis);
}
final ByteArrayOutputStream bout = new ByteArrayOutputStream();
final GzipParameters parameters = new GzipParameters();
parameters.setCompressionLevel(compressionLevel);
final GzipCompressorOutputStream out = new GzipCompressorOutputStream(bout, parameters);
IOUtils.copy(new ByteArrayInputStream(content), out);
out.flush();
out.close();
assertEquals("extra flags (XFL)", flag, bout.toByteArray()[8]);
}