--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/net/httpclient/http2/java.net.http/jdk/internal/net/http/hpack/HuffmanTest.java Wed Feb 07 21:45:37 2018 +0000
@@ -0,0 +1,629 @@
+/*
+ * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.net.http.hpack;
+
+import org.testng.annotations.Test;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.ByteBuffer;
+import java.util.Stack;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import static java.lang.Integer.parseInt;
+import static org.testng.Assert.*;
+
+public final class HuffmanTest {
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-B
+ //
+ private static final String SPEC =
+ // @formatter:off
+ " code as bits as hex len\n" +
+ " sym aligned to MSB aligned in\n" +
+ " to LSB bits\n" +
+ " ( 0) |11111111|11000 1ff8 [13]\n" +
+ " ( 1) |11111111|11111111|1011000 7fffd8 [23]\n" +
+ " ( 2) |11111111|11111111|11111110|0010 fffffe2 [28]\n" +
+ " ( 3) |11111111|11111111|11111110|0011 fffffe3 [28]\n" +
+ " ( 4) |11111111|11111111|11111110|0100 fffffe4 [28]\n" +
+ " ( 5) |11111111|11111111|11111110|0101 fffffe5 [28]\n" +
+ " ( 6) |11111111|11111111|11111110|0110 fffffe6 [28]\n" +
+ " ( 7) |11111111|11111111|11111110|0111 fffffe7 [28]\n" +
+ " ( 8) |11111111|11111111|11111110|1000 fffffe8 [28]\n" +
+ " ( 9) |11111111|11111111|11101010 ffffea [24]\n" +
+ " ( 10) |11111111|11111111|11111111|111100 3ffffffc [30]\n" +
+ " ( 11) |11111111|11111111|11111110|1001 fffffe9 [28]\n" +
+ " ( 12) |11111111|11111111|11111110|1010 fffffea [28]\n" +
+ " ( 13) |11111111|11111111|11111111|111101 3ffffffd [30]\n" +
+ " ( 14) |11111111|11111111|11111110|1011 fffffeb [28]\n" +
+ " ( 15) |11111111|11111111|11111110|1100 fffffec [28]\n" +
+ " ( 16) |11111111|11111111|11111110|1101 fffffed [28]\n" +
+ " ( 17) |11111111|11111111|11111110|1110 fffffee [28]\n" +
+ " ( 18) |11111111|11111111|11111110|1111 fffffef [28]\n" +
+ " ( 19) |11111111|11111111|11111111|0000 ffffff0 [28]\n" +
+ " ( 20) |11111111|11111111|11111111|0001 ffffff1 [28]\n" +
+ " ( 21) |11111111|11111111|11111111|0010 ffffff2 [28]\n" +
+ " ( 22) |11111111|11111111|11111111|111110 3ffffffe [30]\n" +
+ " ( 23) |11111111|11111111|11111111|0011 ffffff3 [28]\n" +
+ " ( 24) |11111111|11111111|11111111|0100 ffffff4 [28]\n" +
+ " ( 25) |11111111|11111111|11111111|0101 ffffff5 [28]\n" +
+ " ( 26) |11111111|11111111|11111111|0110 ffffff6 [28]\n" +
+ " ( 27) |11111111|11111111|11111111|0111 ffffff7 [28]\n" +
+ " ( 28) |11111111|11111111|11111111|1000 ffffff8 [28]\n" +
+ " ( 29) |11111111|11111111|11111111|1001 ffffff9 [28]\n" +
+ " ( 30) |11111111|11111111|11111111|1010 ffffffa [28]\n" +
+ " ( 31) |11111111|11111111|11111111|1011 ffffffb [28]\n" +
+ " ' ' ( 32) |010100 14 [ 6]\n" +
+ " '!' ( 33) |11111110|00 3f8 [10]\n" +
+ " '\"' ( 34) |11111110|01 3f9 [10]\n" +
+ " '#' ( 35) |11111111|1010 ffa [12]\n" +
+ " '$' ( 36) |11111111|11001 1ff9 [13]\n" +
+ " '%' ( 37) |010101 15 [ 6]\n" +
+ " '&' ( 38) |11111000 f8 [ 8]\n" +
+ " ''' ( 39) |11111111|010 7fa [11]\n" +
+ " '(' ( 40) |11111110|10 3fa [10]\n" +
+ " ')' ( 41) |11111110|11 3fb [10]\n" +
+ " '*' ( 42) |11111001 f9 [ 8]\n" +
+ " '+' ( 43) |11111111|011 7fb [11]\n" +
+ " ',' ( 44) |11111010 fa [ 8]\n" +
+ " '-' ( 45) |010110 16 [ 6]\n" +
+ " '.' ( 46) |010111 17 [ 6]\n" +
+ " '/' ( 47) |011000 18 [ 6]\n" +
+ " '0' ( 48) |00000 0 [ 5]\n" +
+ " '1' ( 49) |00001 1 [ 5]\n" +
+ " '2' ( 50) |00010 2 [ 5]\n" +
+ " '3' ( 51) |011001 19 [ 6]\n" +
+ " '4' ( 52) |011010 1a [ 6]\n" +
+ " '5' ( 53) |011011 1b [ 6]\n" +
+ " '6' ( 54) |011100 1c [ 6]\n" +
+ " '7' ( 55) |011101 1d [ 6]\n" +
+ " '8' ( 56) |011110 1e [ 6]\n" +
+ " '9' ( 57) |011111 1f [ 6]\n" +
+ " ':' ( 58) |1011100 5c [ 7]\n" +
+ " ';' ( 59) |11111011 fb [ 8]\n" +
+ " '<' ( 60) |11111111|1111100 7ffc [15]\n" +
+ " '=' ( 61) |100000 20 [ 6]\n" +
+ " '>' ( 62) |11111111|1011 ffb [12]\n" +
+ " '?' ( 63) |11111111|00 3fc [10]\n" +
+ " '@' ( 64) |11111111|11010 1ffa [13]\n" +
+ " 'A' ( 65) |100001 21 [ 6]\n" +
+ " 'B' ( 66) |1011101 5d [ 7]\n" +
+ " 'C' ( 67) |1011110 5e [ 7]\n" +
+ " 'D' ( 68) |1011111 5f [ 7]\n" +
+ " 'E' ( 69) |1100000 60 [ 7]\n" +
+ " 'F' ( 70) |1100001 61 [ 7]\n" +
+ " 'G' ( 71) |1100010 62 [ 7]\n" +
+ " 'H' ( 72) |1100011 63 [ 7]\n" +
+ " 'I' ( 73) |1100100 64 [ 7]\n" +
+ " 'J' ( 74) |1100101 65 [ 7]\n" +
+ " 'K' ( 75) |1100110 66 [ 7]\n" +
+ " 'L' ( 76) |1100111 67 [ 7]\n" +
+ " 'M' ( 77) |1101000 68 [ 7]\n" +
+ " 'N' ( 78) |1101001 69 [ 7]\n" +
+ " 'O' ( 79) |1101010 6a [ 7]\n" +
+ " 'P' ( 80) |1101011 6b [ 7]\n" +
+ " 'Q' ( 81) |1101100 6c [ 7]\n" +
+ " 'R' ( 82) |1101101 6d [ 7]\n" +
+ " 'S' ( 83) |1101110 6e [ 7]\n" +
+ " 'T' ( 84) |1101111 6f [ 7]\n" +
+ " 'U' ( 85) |1110000 70 [ 7]\n" +
+ " 'V' ( 86) |1110001 71 [ 7]\n" +
+ " 'W' ( 87) |1110010 72 [ 7]\n" +
+ " 'X' ( 88) |11111100 fc [ 8]\n" +
+ " 'Y' ( 89) |1110011 73 [ 7]\n" +
+ " 'Z' ( 90) |11111101 fd [ 8]\n" +
+ " '[' ( 91) |11111111|11011 1ffb [13]\n" +
+ " '\\' ( 92) |11111111|11111110|000 7fff0 [19]\n" +
+ " ']' ( 93) |11111111|11100 1ffc [13]\n" +
+ " '^' ( 94) |11111111|111100 3ffc [14]\n" +
+ " '_' ( 95) |100010 22 [ 6]\n" +
+ " '`' ( 96) |11111111|1111101 7ffd [15]\n" +
+ " 'a' ( 97) |00011 3 [ 5]\n" +
+ " 'b' ( 98) |100011 23 [ 6]\n" +
+ " 'c' ( 99) |00100 4 [ 5]\n" +
+ " 'd' (100) |100100 24 [ 6]\n" +
+ " 'e' (101) |00101 5 [ 5]\n" +
+ " 'f' (102) |100101 25 [ 6]\n" +
+ " 'g' (103) |100110 26 [ 6]\n" +
+ " 'h' (104) |100111 27 [ 6]\n" +
+ " 'i' (105) |00110 6 [ 5]\n" +
+ " 'j' (106) |1110100 74 [ 7]\n" +
+ " 'k' (107) |1110101 75 [ 7]\n" +
+ " 'l' (108) |101000 28 [ 6]\n" +
+ " 'm' (109) |101001 29 [ 6]\n" +
+ " 'n' (110) |101010 2a [ 6]\n" +
+ " 'o' (111) |00111 7 [ 5]\n" +
+ " 'p' (112) |101011 2b [ 6]\n" +
+ " 'q' (113) |1110110 76 [ 7]\n" +
+ " 'r' (114) |101100 2c [ 6]\n" +
+ " 's' (115) |01000 8 [ 5]\n" +
+ " 't' (116) |01001 9 [ 5]\n" +
+ " 'u' (117) |101101 2d [ 6]\n" +
+ " 'v' (118) |1110111 77 [ 7]\n" +
+ " 'w' (119) |1111000 78 [ 7]\n" +
+ " 'x' (120) |1111001 79 [ 7]\n" +
+ " 'y' (121) |1111010 7a [ 7]\n" +
+ " 'z' (122) |1111011 7b [ 7]\n" +
+ " '{' (123) |11111111|1111110 7ffe [15]\n" +
+ " '|' (124) |11111111|100 7fc [11]\n" +
+ " '}' (125) |11111111|111101 3ffd [14]\n" +
+ " '~' (126) |11111111|11101 1ffd [13]\n" +
+ " (127) |11111111|11111111|11111111|1100 ffffffc [28]\n" +
+ " (128) |11111111|11111110|0110 fffe6 [20]\n" +
+ " (129) |11111111|11111111|010010 3fffd2 [22]\n" +
+ " (130) |11111111|11111110|0111 fffe7 [20]\n" +
+ " (131) |11111111|11111110|1000 fffe8 [20]\n" +
+ " (132) |11111111|11111111|010011 3fffd3 [22]\n" +
+ " (133) |11111111|11111111|010100 3fffd4 [22]\n" +
+ " (134) |11111111|11111111|010101 3fffd5 [22]\n" +
+ " (135) |11111111|11111111|1011001 7fffd9 [23]\n" +
+ " (136) |11111111|11111111|010110 3fffd6 [22]\n" +
+ " (137) |11111111|11111111|1011010 7fffda [23]\n" +
+ " (138) |11111111|11111111|1011011 7fffdb [23]\n" +
+ " (139) |11111111|11111111|1011100 7fffdc [23]\n" +
+ " (140) |11111111|11111111|1011101 7fffdd [23]\n" +
+ " (141) |11111111|11111111|1011110 7fffde [23]\n" +
+ " (142) |11111111|11111111|11101011 ffffeb [24]\n" +
+ " (143) |11111111|11111111|1011111 7fffdf [23]\n" +
+ " (144) |11111111|11111111|11101100 ffffec [24]\n" +
+ " (145) |11111111|11111111|11101101 ffffed [24]\n" +
+ " (146) |11111111|11111111|010111 3fffd7 [22]\n" +
+ " (147) |11111111|11111111|1100000 7fffe0 [23]\n" +
+ " (148) |11111111|11111111|11101110 ffffee [24]\n" +
+ " (149) |11111111|11111111|1100001 7fffe1 [23]\n" +
+ " (150) |11111111|11111111|1100010 7fffe2 [23]\n" +
+ " (151) |11111111|11111111|1100011 7fffe3 [23]\n" +
+ " (152) |11111111|11111111|1100100 7fffe4 [23]\n" +
+ " (153) |11111111|11111110|11100 1fffdc [21]\n" +
+ " (154) |11111111|11111111|011000 3fffd8 [22]\n" +
+ " (155) |11111111|11111111|1100101 7fffe5 [23]\n" +
+ " (156) |11111111|11111111|011001 3fffd9 [22]\n" +
+ " (157) |11111111|11111111|1100110 7fffe6 [23]\n" +
+ " (158) |11111111|11111111|1100111 7fffe7 [23]\n" +
+ " (159) |11111111|11111111|11101111 ffffef [24]\n" +
+ " (160) |11111111|11111111|011010 3fffda [22]\n" +
+ " (161) |11111111|11111110|11101 1fffdd [21]\n" +
+ " (162) |11111111|11111110|1001 fffe9 [20]\n" +
+ " (163) |11111111|11111111|011011 3fffdb [22]\n" +
+ " (164) |11111111|11111111|011100 3fffdc [22]\n" +
+ " (165) |11111111|11111111|1101000 7fffe8 [23]\n" +
+ " (166) |11111111|11111111|1101001 7fffe9 [23]\n" +
+ " (167) |11111111|11111110|11110 1fffde [21]\n" +
+ " (168) |11111111|11111111|1101010 7fffea [23]\n" +
+ " (169) |11111111|11111111|011101 3fffdd [22]\n" +
+ " (170) |11111111|11111111|011110 3fffde [22]\n" +
+ " (171) |11111111|11111111|11110000 fffff0 [24]\n" +
+ " (172) |11111111|11111110|11111 1fffdf [21]\n" +
+ " (173) |11111111|11111111|011111 3fffdf [22]\n" +
+ " (174) |11111111|11111111|1101011 7fffeb [23]\n" +
+ " (175) |11111111|11111111|1101100 7fffec [23]\n" +
+ " (176) |11111111|11111111|00000 1fffe0 [21]\n" +
+ " (177) |11111111|11111111|00001 1fffe1 [21]\n" +
+ " (178) |11111111|11111111|100000 3fffe0 [22]\n" +
+ " (179) |11111111|11111111|00010 1fffe2 [21]\n" +
+ " (180) |11111111|11111111|1101101 7fffed [23]\n" +
+ " (181) |11111111|11111111|100001 3fffe1 [22]\n" +
+ " (182) |11111111|11111111|1101110 7fffee [23]\n" +
+ " (183) |11111111|11111111|1101111 7fffef [23]\n" +
+ " (184) |11111111|11111110|1010 fffea [20]\n" +
+ " (185) |11111111|11111111|100010 3fffe2 [22]\n" +
+ " (186) |11111111|11111111|100011 3fffe3 [22]\n" +
+ " (187) |11111111|11111111|100100 3fffe4 [22]\n" +
+ " (188) |11111111|11111111|1110000 7ffff0 [23]\n" +
+ " (189) |11111111|11111111|100101 3fffe5 [22]\n" +
+ " (190) |11111111|11111111|100110 3fffe6 [22]\n" +
+ " (191) |11111111|11111111|1110001 7ffff1 [23]\n" +
+ " (192) |11111111|11111111|11111000|00 3ffffe0 [26]\n" +
+ " (193) |11111111|11111111|11111000|01 3ffffe1 [26]\n" +
+ " (194) |11111111|11111110|1011 fffeb [20]\n" +
+ " (195) |11111111|11111110|001 7fff1 [19]\n" +
+ " (196) |11111111|11111111|100111 3fffe7 [22]\n" +
+ " (197) |11111111|11111111|1110010 7ffff2 [23]\n" +
+ " (198) |11111111|11111111|101000 3fffe8 [22]\n" +
+ " (199) |11111111|11111111|11110110|0 1ffffec [25]\n" +
+ " (200) |11111111|11111111|11111000|10 3ffffe2 [26]\n" +
+ " (201) |11111111|11111111|11111000|11 3ffffe3 [26]\n" +
+ " (202) |11111111|11111111|11111001|00 3ffffe4 [26]\n" +
+ " (203) |11111111|11111111|11111011|110 7ffffde [27]\n" +
+ " (204) |11111111|11111111|11111011|111 7ffffdf [27]\n" +
+ " (205) |11111111|11111111|11111001|01 3ffffe5 [26]\n" +
+ " (206) |11111111|11111111|11110001 fffff1 [24]\n" +
+ " (207) |11111111|11111111|11110110|1 1ffffed [25]\n" +
+ " (208) |11111111|11111110|010 7fff2 [19]\n" +
+ " (209) |11111111|11111111|00011 1fffe3 [21]\n" +
+ " (210) |11111111|11111111|11111001|10 3ffffe6 [26]\n" +
+ " (211) |11111111|11111111|11111100|000 7ffffe0 [27]\n" +
+ " (212) |11111111|11111111|11111100|001 7ffffe1 [27]\n" +
+ " (213) |11111111|11111111|11111001|11 3ffffe7 [26]\n" +
+ " (214) |11111111|11111111|11111100|010 7ffffe2 [27]\n" +
+ " (215) |11111111|11111111|11110010 fffff2 [24]\n" +
+ " (216) |11111111|11111111|00100 1fffe4 [21]\n" +
+ " (217) |11111111|11111111|00101 1fffe5 [21]\n" +
+ " (218) |11111111|11111111|11111010|00 3ffffe8 [26]\n" +
+ " (219) |11111111|11111111|11111010|01 3ffffe9 [26]\n" +
+ " (220) |11111111|11111111|11111111|1101 ffffffd [28]\n" +
+ " (221) |11111111|11111111|11111100|011 7ffffe3 [27]\n" +
+ " (222) |11111111|11111111|11111100|100 7ffffe4 [27]\n" +
+ " (223) |11111111|11111111|11111100|101 7ffffe5 [27]\n" +
+ " (224) |11111111|11111110|1100 fffec [20]\n" +
+ " (225) |11111111|11111111|11110011 fffff3 [24]\n" +
+ " (226) |11111111|11111110|1101 fffed [20]\n" +
+ " (227) |11111111|11111111|00110 1fffe6 [21]\n" +
+ " (228) |11111111|11111111|101001 3fffe9 [22]\n" +
+ " (229) |11111111|11111111|00111 1fffe7 [21]\n" +
+ " (230) |11111111|11111111|01000 1fffe8 [21]\n" +
+ " (231) |11111111|11111111|1110011 7ffff3 [23]\n" +
+ " (232) |11111111|11111111|101010 3fffea [22]\n" +
+ " (233) |11111111|11111111|101011 3fffeb [22]\n" +
+ " (234) |11111111|11111111|11110111|0 1ffffee [25]\n" +
+ " (235) |11111111|11111111|11110111|1 1ffffef [25]\n" +
+ " (236) |11111111|11111111|11110100 fffff4 [24]\n" +
+ " (237) |11111111|11111111|11110101 fffff5 [24]\n" +
+ " (238) |11111111|11111111|11111010|10 3ffffea [26]\n" +
+ " (239) |11111111|11111111|1110100 7ffff4 [23]\n" +
+ " (240) |11111111|11111111|11111010|11 3ffffeb [26]\n" +
+ " (241) |11111111|11111111|11111100|110 7ffffe6 [27]\n" +
+ " (242) |11111111|11111111|11111011|00 3ffffec [26]\n" +
+ " (243) |11111111|11111111|11111011|01 3ffffed [26]\n" +
+ " (244) |11111111|11111111|11111100|111 7ffffe7 [27]\n" +
+ " (245) |11111111|11111111|11111101|000 7ffffe8 [27]\n" +
+ " (246) |11111111|11111111|11111101|001 7ffffe9 [27]\n" +
+ " (247) |11111111|11111111|11111101|010 7ffffea [27]\n" +
+ " (248) |11111111|11111111|11111101|011 7ffffeb [27]\n" +
+ " (249) |11111111|11111111|11111111|1110 ffffffe [28]\n" +
+ " (250) |11111111|11111111|11111101|100 7ffffec [27]\n" +
+ " (251) |11111111|11111111|11111101|101 7ffffed [27]\n" +
+ " (252) |11111111|11111111|11111101|110 7ffffee [27]\n" +
+ " (253) |11111111|11111111|11111101|111 7ffffef [27]\n" +
+ " (254) |11111111|11111111|11111110|000 7fffff0 [27]\n" +
+ " (255) |11111111|11111111|11111011|10 3ffffee [26]\n" +
+ " EOS (256) |11111111|11111111|11111111|111111 3fffffff [30]";
+ // @formatter:on
+
+ @Test
+ public void read_table() throws IOException {
+ Pattern line = Pattern.compile(
+ "\\(\\s*(?<ascii>\\d+)\\s*\\)\\s*(?<binary>(\\|(0|1)+)+)\\s*" +
+ "(?<hex>[0-9a-zA-Z]+)\\s*\\[\\s*(?<len>\\d+)\\s*\\]");
+ Matcher m = line.matcher(SPEC);
+ int i = 0;
+ while (m.find()) {
+ String ascii = m.group("ascii");
+ String binary = m.group("binary").replaceAll("\\|", "");
+ String hex = m.group("hex");
+ String len = m.group("len");
+
+ // Several sanity checks for the data read from the table, just to
+ // make sure what we read makes sense
+ assertEquals(parseInt(len), binary.length());
+ assertEquals(parseInt(binary, 2), parseInt(hex, 16));
+
+ int expected = parseInt(ascii);
+
+ // TODO: find actual eos, do not hardcode it!
+ byte[] bytes = intToBytes(0x3fffffff, 30,
+ parseInt(hex, 16), parseInt(len));
+
+ StringBuilder actual = new StringBuilder();
+ Huffman.Reader t = new Huffman.Reader();
+ t.read(ByteBuffer.wrap(bytes), actual, false, true);
+
+ // What has been read MUST represent a single symbol
+ assertEquals(actual.length(), 1, "ascii: " + ascii);
+
+ // It's a lot more visual to compare char as codes rather than
+ // characters (as some of them might not be visible)
+ assertEquals(actual.charAt(0), expected);
+ i++;
+ }
+ assertEquals(i, 257); // 256 + EOS
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.4.1
+ //
+ @Test
+ public void read_1() {
+ read("f1e3 c2e5 f23a 6ba0 ab90 f4ff", "www.example.com");
+ }
+
+ @Test
+ public void write_1() {
+ write("www.example.com", "f1e3 c2e5 f23a 6ba0 ab90 f4ff");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.4.2
+ //
+ @Test
+ public void read_2() {
+ read("a8eb 1064 9cbf", "no-cache");
+ }
+
+ @Test
+ public void write_2() {
+ write("no-cache", "a8eb 1064 9cbf");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.4.3
+ //
+ @Test
+ public void read_3() {
+ read("25a8 49e9 5ba9 7d7f", "custom-key");
+ }
+
+ @Test
+ public void write_3() {
+ write("custom-key", "25a8 49e9 5ba9 7d7f");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.4.3
+ //
+ @Test
+ public void read_4() {
+ read("25a8 49e9 5bb8 e8b4 bf", "custom-value");
+ }
+
+ @Test
+ public void write_4() {
+ write("custom-value", "25a8 49e9 5bb8 e8b4 bf");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.6.1
+ //
+ @Test
+ public void read_5() {
+ read("6402", "302");
+ }
+
+ @Test
+ public void write_5() {
+ write("302", "6402");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.6.1
+ //
+ @Test
+ public void read_6() {
+ read("aec3 771a 4b", "private");
+ }
+
+ @Test
+ public void write_6() {
+ write("private", "aec3 771a 4b");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.6.1
+ //
+ @Test
+ public void read_7() {
+ read("d07a be94 1054 d444 a820 0595 040b 8166 e082 a62d 1bff",
+ "Mon, 21 Oct 2013 20:13:21 GMT");
+ }
+
+ @Test
+ public void write_7() {
+ write("Mon, 21 Oct 2013 20:13:21 GMT",
+ "d07a be94 1054 d444 a820 0595 040b 8166 e082 a62d 1bff");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.6.1
+ //
+ @Test
+ public void read_8() {
+ read("9d29 ad17 1863 c78f 0b97 c8e9 ae82 ae43 d3",
+ "https://www.example.com");
+ }
+
+ @Test
+ public void write_8() {
+ write("https://www.example.com",
+ "9d29 ad17 1863 c78f 0b97 c8e9 ae82 ae43 d3");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.6.2
+ //
+ @Test
+ public void read_9() {
+ read("640e ff", "307");
+ }
+
+ @Test
+ public void write_9() {
+ write("307", "640e ff");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.6.3
+ //
+ @Test
+ public void read_10() {
+ read("d07a be94 1054 d444 a820 0595 040b 8166 e084 a62d 1bff",
+ "Mon, 21 Oct 2013 20:13:22 GMT");
+ }
+
+ @Test
+ public void write_10() {
+ write("Mon, 21 Oct 2013 20:13:22 GMT",
+ "d07a be94 1054 d444 a820 0595 040b 8166 e084 a62d 1bff");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.6.3
+ //
+ @Test
+ public void read_11() {
+ read("9bd9 ab", "gzip");
+ }
+
+ @Test
+ public void write_11() {
+ write("gzip", "9bd9 ab");
+ }
+
+ //
+ // https://tools.ietf.org/html/rfc7541#appendix-C.6.3
+ //
+ @Test
+ public void read_12() {
+ read("94e7 821d d7f2 e6c7 b335 dfdf cd5b 3960 " +
+ "d5af 2708 7f36 72c1 ab27 0fb5 291f 9587 " +
+ "3160 65c0 03ed 4ee5 b106 3d50 07",
+ "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1");
+ }
+
+ @Test
+ public void test_trie_has_no_empty_nodes() {
+ Huffman.Node root = Huffman.INSTANCE.getRoot();
+ Stack<Huffman.Node> backlog = new Stack<>();
+ backlog.push(root);
+ while (!backlog.isEmpty()) {
+ Huffman.Node n = backlog.pop();
+ // The only type of nodes we couldn't possibly catch during
+ // construction is an empty node: no children and no char
+ if (n.left != null) {
+ backlog.push(n.left);
+ }
+ if (n.right != null) {
+ backlog.push(n.right);
+ }
+ assertFalse(!n.charIsSet && n.left == null && n.right == null,
+ "Empty node in the trie");
+ }
+ }
+
+ @Test
+ public void test_trie_has_257_nodes() {
+ int count = 0;
+ Huffman.Node root = Huffman.INSTANCE.getRoot();
+ Stack<Huffman.Node> backlog = new Stack<>();
+ backlog.push(root);
+ while (!backlog.isEmpty()) {
+ Huffman.Node n = backlog.pop();
+ if (n.left != null) {
+ backlog.push(n.left);
+ }
+ if (n.right != null) {
+ backlog.push(n.right);
+ }
+ if (n.isLeaf()) {
+ count++;
+ }
+ }
+ assertEquals(count, 257);
+ }
+
+ @Test
+ public void cant_encode_outside_byte() {
+ TestHelper.Block<Object> coding =
+ () -> new Huffman.Writer()
+ .from(((char) 256) + "", 0, 1)
+ .write(ByteBuffer.allocate(1));
+ RuntimeException e =
+ TestHelper.assertVoidThrows(RuntimeException.class, coding);
+ TestHelper.assertExceptionMessageContains(e, "char");
+ }
+
+ private static void read(String hexdump, String decoded) {
+ ByteBuffer source = SpecHelper.toBytes(hexdump);
+ Appendable actual = new StringBuilder();
+ try {
+ new Huffman.Reader().read(source, actual, true);
+ } catch (IOException e) {
+ throw new UncheckedIOException(e);
+ }
+ assertEquals(actual.toString(), decoded);
+ }
+
+ private static void write(String decoded, String hexdump) {
+ int n = Huffman.INSTANCE.lengthOf(decoded);
+ ByteBuffer destination = ByteBuffer.allocate(n); // Extra margin (1) to test having more bytes in the destination than needed is ok
+ Huffman.Writer writer = new Huffman.Writer();
+ BuffersTestingKit.forEachSplit(destination, byteBuffers -> {
+ writer.from(decoded, 0, decoded.length());
+ boolean written = false;
+ for (ByteBuffer b : byteBuffers) {
+ int pos = b.position();
+ written = writer.write(b);
+ b.position(pos);
+ }
+ assertTrue(written);
+ ByteBuffer concated = BuffersTestingKit.concat(byteBuffers);
+ String actual = SpecHelper.toHexdump(concated);
+ assertEquals(actual, hexdump);
+ writer.reset();
+ });
+ }
+
+ //
+ // It's not very pretty, yes I know that
+ //
+ // hex:
+ //
+ // |31|30|...|N-1|...|01|00|
+ // \ /
+ // codeLength
+ //
+ // hex <<= 32 - codeLength; (align to MSB):
+ //
+ // |31|30|...|32-N|...|01|00|
+ // \ /
+ // codeLength
+ //
+ // EOS:
+ //
+ // |31|30|...|M-1|...|01|00|
+ // \ /
+ // eosLength
+ //
+ // eos <<= 32 - eosLength; (align to MSB):
+ //
+ // pad with MSBs of EOS:
+ //
+ // |31|30|...|32-N|32-N-1|...|01|00|
+ // | 32|...|
+ //
+ // Finally, split into byte[]
+ //
+ private byte[] intToBytes(int eos, int eosLength, int hex, int codeLength) {
+ hex <<= 32 - codeLength;
+ eos >>= codeLength - (32 - eosLength);
+ hex |= eos;
+ int n = (int) Math.ceil(codeLength / 8.0);
+ byte[] result = new byte[n];
+ for (int i = 0; i < n; i++) {
+ result[i] = (byte) (hex >> (32 - 8 * (i + 1)));
+ }
+ return result;
+ }
+}