Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_struct.py @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 32f6b0d3a66f
children aedd2d0dcb31
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1 from test_support import TestFailed, verbose
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2 import struct
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3 ## import pdb
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4
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5 def simple_err(func, *args):
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6 try:
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7 apply(func, args)
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8 except struct.error:
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9 pass
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10 else:
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11 raise TestFailed, "%s%s did not raise struct.error" % (
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12 func.__name__, args)
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13 ## pdb.set_trace()
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14
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15 simple_err(struct.calcsize, 'Q')
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16
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17 sz = struct.calcsize('i')
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18 if sz * 3 <> struct.calcsize('iii'):
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19 raise TestFailed, 'inconsistent sizes'
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20
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21 fmt = 'cbxxxxxxhhhhiillffd'
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22 fmt3 = '3c3b18x12h6i6l6f3d'
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23 sz = struct.calcsize(fmt)
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24 sz3 = struct.calcsize(fmt3)
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25 if sz * 3 <> sz3:
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26 raise TestFailed, 'inconsistent sizes (3*%s -> 3*%d = %d, %s -> %d)' % (
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27 `fmt`, sz, 3*sz, `fmt3`, sz3)
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28
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29 simple_err(struct.pack, 'iii', 3)
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30 simple_err(struct.pack, 'i', 3, 3, 3)
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31 simple_err(struct.pack, 'i', 'foo')
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32 simple_err(struct.unpack, 'd', 'flap')
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33 s = struct.pack('ii', 1, 2)
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34 simple_err(struct.unpack, 'iii', s)
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35 simple_err(struct.unpack, 'i', s)
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36
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37 c = 'a'
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38 b = 1
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39 h = 255
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40 i = 65535
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41 l = 65536
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42 f = 3.1415
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43 d = 3.1415
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44
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45 for prefix in ('', '@', '<', '>', '=', '!'):
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46 for format in ('xcbhilfd', 'xcBHILfd'):
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47 format = prefix + format
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48 if verbose:
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49 print "trying:", format
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50 s = struct.pack(format, c, b, h, i, l, f, d)
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51 cp, bp, hp, ip, lp, fp, dp = struct.unpack(format, s)
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52 if (cp <> c or bp <> b or hp <> h or ip <> i or lp <> l or
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53 int(100 * fp) <> int(100 * f) or int(100 * dp) <> int(100 * d)):
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54 # ^^^ calculate only to two decimal places
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55 raise TestFailed, "unpack/pack not transitive (%s, %s)" % (
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56 str(format), str((cp, bp, hp, ip, lp, fp, dp)))
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57
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58 # Test some of the new features in detail
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59
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60 # (format, argument, big-endian result, little-endian result, asymmetric)
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61 tests = [
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62 ('c', 'a', 'a', 'a', 0),
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63 ('xc', 'a', '\0a', '\0a', 0),
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64 ('cx', 'a', 'a\0', 'a\0', 0),
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65 ('s', 'a', 'a', 'a', 0),
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66 ('0s', 'helloworld', '', '', 1),
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67 ('1s', 'helloworld', 'h', 'h', 1),
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68 ('9s', 'helloworld', 'helloworl', 'helloworl', 1),
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69 ('10s', 'helloworld', 'helloworld', 'helloworld', 0),
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70 ('11s', 'helloworld', 'helloworld\0', 'helloworld\0', 1),
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71 ('20s', 'helloworld', 'helloworld'+10*'\0', 'helloworld'+10*'\0', 1),
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72 ('b', 7, '\7', '\7', 0),
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73 ('b', -7, '\371', '\371', 0),
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74 ('B', 7, '\7', '\7', 0),
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75 ('B', 249, '\371', '\371', 0),
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76 ('h', 700, '\002\274', '\274\002', 0),
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77 ('h', -700, '\375D', 'D\375', 0),
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78 ('H', 700, '\002\274', '\274\002', 0),
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79 ('H', 0x10000-700, '\375D', 'D\375', 0),
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80 ('i', 70000000, '\004,\035\200', '\200\035,\004', 0),
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81 ('i', -70000000, '\373\323\342\200', '\200\342\323\373', 0),
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82 ('I', 70000000L, '\004,\035\200', '\200\035,\004', 0),
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83 ('I', 0x100000000L-70000000, '\373\323\342\200', '\200\342\323\373', 0),
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84 ('l', 70000000, '\004,\035\200', '\200\035,\004', 0),
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85 ('l', -70000000, '\373\323\342\200', '\200\342\323\373', 0),
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86 ('L', 70000000L, '\004,\035\200', '\200\035,\004', 0),
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87 ('L', 0x100000000L-70000000, '\373\323\342\200', '\200\342\323\373', 0),
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88 ('f', 2.0, '@\000\000\000', '\000\000\000@', 0),
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89 ('d', 2.0, '@\000\000\000\000\000\000\000',
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90 '\000\000\000\000\000\000\000@', 0),
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91 ('f', -2.0, '\300\000\000\000', '\000\000\000\300', 0),
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92 ('d', -2.0, '\300\000\000\000\000\000\000\000',
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93 '\000\000\000\000\000\000\000\300', 0),
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94 ]
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95
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96 def badpack(fmt, arg, got, exp):
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97 return
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98
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99 def badunpack(fmt, arg, got, exp):
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100 return "unpack(%s, %s) -> (%s,) # expected (%s,)" % (
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101 `fmt`, `arg`, `got`, `exp`)
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102
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103 isbigendian = struct.pack('=h', 1) == '\0\1'
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104
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105 for fmt, arg, big, lil, asy in tests:
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106 if verbose:
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107 print `fmt`, `arg`, `big`, `lil`
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108 for (xfmt, exp) in [('>'+fmt, big), ('!'+fmt, big), ('<'+fmt, lil),
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109 ('='+fmt, isbigendian and big or lil)]:
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110 res = struct.pack(xfmt, arg)
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111 if res != exp:
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112 raise TestFailed, "pack(%s, %s) -> %s # expected %s" % (
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113 `fmt`, `arg`, `res`, `exp`)
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114 n = struct.calcsize(xfmt)
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115 if n != len(res):
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116 raise TestFailed, "calcsize(%s) -> %d # expected %d" % (
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117 `xfmt`, n, len(res))
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118 rev = struct.unpack(xfmt, res)[0]
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119 if rev != arg and not asy:
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120 raise TestFailed, "unpack(%s, %s) -> (%s,) # expected (%s,)" % (
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121 `fmt`, `res`, `rev`, `arg`)