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  1. # coding: ascii-8bit
  2.  
  3. require 'test/unit'
  4.  
  5. class TestPackUnpack < Test::Unit::TestCase
  6.   def test_pack_unpack
  7.  
  8.     # hex数値 to hex文字列
  9.     assert_equal(0x12345678.to_s(16),"12345678")
  10.     assert_equal(0x1234_5678.to_s(16),"12345678")
  11.     assert_equal(0x12_34_56_78.to_s(16),"12345678")
  12.  
  13.     # hex文字列 to hex数値
  14.     assert_equal("12345678".to_i(16), 0x1234_5678)
  15.     assert_equal("ab cd".split, ["ab","cd"])
  16.     assert_equal("12 34".split.collect{|c| c.to_i(16)}, [0x12,0x34])
  17.  
  18.     # hex文字列 to バイナリーデータ
  19.     # Array#pack('C*')は、配列に入っているものを8ビット符号なし整数と見てpackする
  20.     assert_equal("61 62 63 64".split.collect{|c| c.to_i(16)}.pack('C*'), "abcd")
  21.     assert_equal("61 62 63 64".split.collect{|c| c.to_i(16)}.pack('C*'), "\x61\x62\x63\x64")
  22.     assert_equal("90 a0 e0 f0".split.collect{|c| c.to_i(16)}.pack('C*'), "\x90\xa0\xe0\xf0")
  23.     # バイナリーデータ to hex文字列
  24.     # String#unpack('C*')は、文字列を8ビット符号なし整数の配列にunpackする
  25.     assert_equal("\x90\xa0\xe0\xf0".unpack('C*').collect{|d| sprintf("%02x",d)}.join(' '), "90 a0 e0 f0")
  26.  
  27.     hex_line = "00 10 20 30 40 50 60 70 80 90 a0 b0 c0 d0 e0 f0"
  28.     num_array = [0, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, 240]
  29.     bin_data = "\x00\x10\x20\x30\x40\x50\x60\x70\x80\x90\xa0\xb0\xc0\xd0\xe0\xf0"
  30.     assert_equal(hex_line.split.collect{|c| c.to_i(16)}.pack('C*'),bin_data)
  31.     # hex文字列 to バイナリーデータ
  32.     assert_equal(hex_line.split.collect{|c| c.to_i(16)}, num_array)
  33.     assert_equal(hex_line.split.collect{|c| c.to_i(16)}.pack('C*'), bin_data)
  34.     # バイナリーデータ to hex文字列
  35.     assert_equal(bin_data.unpack('C*'), num_array)
  36.     assert_equal(bin_data.unpack('C*').collect{|d| sprintf("%02x",d)}.join(' '), hex_line)
  37.  
  38.     # endian reverse unsigned 16bit
  39.     assert_equal("\001\002".unpack("n"), [0x0102])
  40.     assert_equal("\001\002".unpack("n").pack("v"),"\002\001")
  41.     assert_equal("\001\002".unpack("v"), [0x0201])
  42.     assert_equal("\001\002".unpack("v").pack("n"),"\002\001")
  43.  
  44.     # endian reverse unsigned 32bit
  45.     assert_equal("\001\002\003\004".unpack("N"), [0x01020304])
  46.     assert_equal("\001\002\003\004".unpack("N").pack("V"),"\004\003\002\001")
  47.     assert_equal("\001\002\003\004".unpack("n2"), [0x0102, 0x0304])
  48.     assert_equal("\001\002\003\004".unpack("n2").reverse, [0x0304, 0x0102])
  49.     assert_equal("\001\002\003\004".unpack("n2").reverse.pack("v2"),"\004\003\002\001")
  50.  
  51.     # endian reverse unsigned 64bit
  52.     assert_equal("\001\002\003\004\005\006\a\b".unpack("N2").reverse.pack("V2"),"\b\a\006\005\004\003\002\001")
  53.     assert_equal("\001\002\003\004","\x01\x02\x03\x04")
  54.  
  55.     # big endian unsigned 16bit to integer
  56.     assert_equal("\001\002".unpack("n"),[258])
  57.     assert_equal("\001\002".unpack("n")[0],258)
  58.     assert_equal("\001\002".unpack("n1")[0], 0x0102)
  59.  
  60.     # big endian unsigned 32bit to integer
  61.     assert_equal("\001\002\003\004".unpack("N1")[0], 0x01020304)
  62.  
  63.     # big endian unsigned 64bit to integer
  64.     b = "\001\002\003\004\005\006\a\b"
  65.     assert_equal(0x1_0000_0000 * (b.unpack("N2")[0]) + b.unpack("N2")[1], 0x0102030405060708)
  66.  
  67.     # big endian unsigned 32bit to 4 unsigned 8bit
  68.     adrs = 0x11223344
  69.     assert_equal([adrs].pack("N*"), "\x11\x22\x33\x44")
  70.     assert_equal([adrs].pack("N*").unpack("C*"), [0x11,0x22,0x33,0x44])
  71.     adrs = 0xFFEEDDCC
  72.     assert_equal([adrs].pack("N*").unpack("C*"), [0xFF,0xEE,0xDD,0xCC])
  73.  
  74.     # 0x01020304を"1.2.3.4"にする
  75.     adrs = 0x01020304
  76.     assert_equal([adrs].pack("N*"), "\x01\x02\x03\x04")
  77.     assert_equal([adrs].pack("N*").unpack("C*"), [1, 2, 3, 4])
  78.     assert_equal([adrs].pack("N*").unpack("C*").join("."), "1.2.3.4")
  79.  
  80.     # big endian unsigned 32bit to IP Address
  81.     # "\x01\x02\x03\x04"を"1.2.3.4"にする
  82.     assert_equal("\x01\x02\x03\x04".unpack("C4"), [1, 2, 3, 4])
  83.     assert_equal("\x01\x02\x03\x04".unpack("C4").map{|d| d.to_s}, ["1", "2", "3", "4"])
  84.     assert_equal("\x01\x02\x03\x04".unpack("C4").map{|d| d.to_s}.join("."), "1.2.3.4")
  85.     assert_equal("\x01\x02\x03\x04".unpack("C4").join("."), "1.2.3.4")
  86.     assert_equal("\xC0\xC1\xC2\xC3".unpack("C4").join("."), "192.193.194.195")
  87.  
  88.     # "1.2.3.4"を"\x01\x02\x03\x04" にする
  89.     assert_equal("1.2.3.4".split("."), ["1", "2", "3", "4"])
  90.     assert_equal("1.2.3.4".split(".").map{|s| s.to_i}, [1, 2, 3, 4])
  91.     assert_equal("1.2.3.4".split(".").map{|s| s.to_i}.pack("C4"), "\x01\x02\x03\x04")
  92.     assert_equal("192.193.194.195".split(".").map{|s| s.to_i}.pack("C4"), "\xC0\xC1\xC2\xC3")
  93.   end
  94. end
Success #stdin #stdout 0.03s 5672KB
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Standard input is empty
stdout
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Loaded suite prog
Started
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Finished in 0.010528 seconds.

1 tests, 46 assertions, 0 failures, 0 errors, 0 skips

Test run options: --seed 18911
https://ideone.com/CRZW9
language:
Ruby (ruby 2.5.5)
created:
11 years ago
visibility:
secret

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