@Test
public void testMetadataRoundTrip() throws Exception {
final ByteArrayOutputStream bout = new ByteArrayOutputStream();
final GzipParameters parameters = new GzipParameters();
parameters.setCompressionLevel(Deflater.BEST_COMPRESSION);
parameters.setModificationTime(123456000);
parameters.setOperatingSystem(13);
parameters.setFilename("test3.xml");
parameters.setComment("Umlaute möglich?");
try (GzipCompressorOutputStream out = new GzipCompressorOutputStream(bout, parameters);
FileInputStream fis = new FileInputStream(getFile("test3" + ".xml"))) {
IOUtils.copy(fis, out);
}
final GzipCompressorInputStream input =
new GzipCompressorInputStream(new ByteArrayInputStream(bout.toByteArray()));
input.close();
final GzipParameters readParams = input.getMetaData();
assertEquals(Deflater.BEST_COMPRESSION, readParams.getCompressionLevel());
assertEquals(123456000, readParams.getModificationTime());
assertEquals(13, readParams.getOperatingSystem());
assertEquals("test3.xml", readParams.getFilename());
assertEquals("Umlaute möglich?", readParams.getComment());
}
@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);
}
@Test
public void testInvalidCompressionLevel() {
final GzipParameters parameters = new GzipParameters();
try {
parameters.setCompressionLevel(10);
fail("IllegalArgumentException not thrown");
} catch (final IllegalArgumentException e) {
// expected
}
try {
parameters.setCompressionLevel(-5);
fail("IllegalArgumentException not thrown");
} catch (final IllegalArgumentException e) {
// expected
}
}
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]);
}