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package fi.iki.elonen;

/*
 * #%L
 * NanoHttpd-Core
 * %%
 * Copyright (C) 2012 - 2015 nanohttpd
 * %%
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * 3. Neither the name of the nanohttpd nor the names of its contributors
 *    may be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * #L%
 */

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PipedInputStream;

import static fi.iki.elonen.NanoHTTPD.Response.Status.OK;

public class HttpChunkedResponseTest extends HttpServerTest {
    @org.junit.Test
    public void thatChunkedContentIsChunked() throws Exception {
        PipedInputStream pipedInputStream = new ChunkedInputStream(new String[]{
                "some",
                "thing which is longer than sixteen characters",
                "whee!",
                ""
        });
        String[] expected = {
                "HTTP/1.1 200 OK",
                "Content-Type: what/ever",
                "Date: .*",
                "Connection: keep-alive",
                "Transfer-Encoding: chunked",
                "",
                "4",
                "some",
                "2d",
                "thing which is longer than sixteen characters",
                "5",
                "whee!",
                "0",
                ""
        };
        testServer.response = new NanoHTTPD.Response(OK, "what/ever", pipedInputStream);
        testServer.response.setChunkedTransfer(true);

        ByteArrayOutputStream byteArrayOutputStream = invokeServer("GET / HTTP/1.0");

        assertResponse(byteArrayOutputStream, expected);
    }

    private static class ChunkedInputStream extends PipedInputStream {
        int chunk = 0;
        String[] chunks;

        private ChunkedInputStream(String[] chunks) {
            this.chunks = chunks;
        }

        @Override
        public synchronized int read(byte[] buffer) throws IOException {
            // Too implementation-linked, but...
            for (int i = 0; i < chunks[chunk].length(); ++i) {
                buffer[i] = (byte) chunks[chunk].charAt(i);
            }
            return chunks[chunk++].length();
        }
    }
}