HttpResponseEncoderTest Class — netty Architecture

Source Code

codec-http/src/test/java/io/netty/handler/codec/http/HttpResponseEncoderTest.java lines 33–402

public class HttpResponseEncoderTest {
    private static final long INTEGER_OVERFLOW = (long) Integer.MAX_VALUE + 1;
    private static final FileRegion FILE_REGION = new DummyLongFileRegion();

    @Test
    public void testLargeFileRegionChunked() throws Exception {
        EmbeddedChannel channel = new EmbeddedChannel(new HttpResponseEncoder());
        HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
        response.headers().set(HttpHeaderNames.TRANSFER_ENCODING, HttpHeaderValues.CHUNKED);
        assertTrue(channel.writeOutbound(response));

        ByteBuf buffer = channel.readOutbound();

        assertEquals("HTTP/1.1 200 OK\r\n" + HttpHeaderNames.TRANSFER_ENCODING + ": " +
                HttpHeaderValues.CHUNKED + "\r\n\r\n", buffer.toString(CharsetUtil.US_ASCII));
        buffer.release();
        assertTrue(channel.writeOutbound(FILE_REGION));
        buffer = channel.readOutbound();
        assertEquals("80000000\r\n", buffer.toString(CharsetUtil.US_ASCII));
        buffer.release();

        FileRegion region = channel.readOutbound();
        assertSame(FILE_REGION, region);
        region.release();
        buffer = channel.readOutbound();
        assertEquals("\r\n", buffer.toString(CharsetUtil.US_ASCII));
        buffer.release();

        assertTrue(channel.writeOutbound(LastHttpContent.EMPTY_LAST_CONTENT));
        buffer = channel.readOutbound();
        assertEquals("0\r\n\r\n", buffer.toString(CharsetUtil.US_ASCII));
        buffer.release();

        assertFalse(channel.finish());
    }

    private static class DummyLongFileRegion implements FileRegion {

        @Override
        public long position() {
            return 0;
        }

        @Override
        public long transfered() {
            return 0;
        }

        @Override
        public long transferred() {
            return 0;
        }

        @Override
        public long count() {
            return INTEGER_OVERFLOW;
        }

        @Override
        public long transferTo(WritableByteChannel target, long position) throws IOException {
            throw new UnsupportedOperationException();
        }

        @Override
        public FileRegion touch(Object hint) {
            return this;
        }

        @Override
        public FileRegion touch() {
            return this;
        }

        @Override
        public FileRegion retain() {
            return this;
        }

        @Override
        public FileRegion retain(int increment) {
            return this;