1/*
2 * Copyright 2013 Twitter, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16package com.squareup.okhttp.internal.spdy;
17
18import java.io.ByteArrayOutputStream;
19import java.io.DataOutputStream;
20import java.io.IOException;
21import java.util.Arrays;
22import java.util.Random;
23import org.junit.Test;
24
25import static org.junit.Assert.assertEquals;
26import static org.junit.Assert.assertTrue;
27
28/**
29 * Original version of this class was lifted from {@code com.twitter.hpack.HuffmanTest}.
30 */
31public class HuffmanTest {
32
33  @Test public void roundTripForRequestAndResponse() throws IOException {
34    String s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
35    for (int i = 0; i < s.length(); i++) {
36      assertRoundTrip(s.substring(0, i).getBytes());
37    }
38
39    Random random = new Random(123456789L);
40    byte[] buf = new byte[4096];
41    random.nextBytes(buf);
42    assertRoundTrip(buf);
43  }
44
45  private void assertRoundTrip(byte[] buf) throws IOException {
46    assertRoundTrip(Huffman.Codec.REQUEST, buf);
47    assertRoundTrip(Huffman.Codec.RESPONSE, buf);
48  }
49
50  private static void assertRoundTrip(Huffman.Codec codec, byte[] buf) throws IOException {
51    ByteArrayOutputStream baos = new ByteArrayOutputStream();
52    DataOutputStream dos = new DataOutputStream(baos);
53
54    codec.encode(buf, dos);
55    assertEquals(baos.size(), codec.encodedLength(buf));
56
57    byte[] decodedBytes = codec.decode(baos.toByteArray());
58    assertTrue(Arrays.equals(buf, decodedBytes));
59  }
60}
61