Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_fileinput.py @ 78069:a8aa77458e12 3.2

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Add c_size_t and c_ssize_t to the ctypes summary table.
author Antoine Pitrou <solipsis@pitrou.net>
date Thu, 12 Jul 2012 20:31:50 +0200
parents ab89d0f52a7f
children f2e04ce75f0b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 '''
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2 Tests for fileinput module.
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3 Nick Mathewson
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4 '''
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5
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6 import unittest
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7 from test.support import verbose, TESTFN, run_unittest
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8 from test.support import unlink as safe_unlink
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9 import sys, re
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10 from io import StringIO
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11 from fileinput import FileInput, hook_encoded
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12
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13 # The fileinput module has 2 interfaces: the FileInput class which does
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14 # all the work, and a few functions (input, etc.) that use a global _state
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15 # variable. We only test the FileInput class, since the other functions
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16 # only provide a thin facade over FileInput.
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17
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18 # Write lines (a list of lines) to temp file number i, and return the
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19 # temp file's name.
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20 def writeTmp(i, lines, mode='w'): # opening in text mode is the default
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21 name = TESTFN + str(i)
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22 f = open(name, mode)
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23 for line in lines:
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24 f.write(line)
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25 f.close()
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26 return name
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27
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28 def remove_tempfiles(*names):
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29 for name in names:
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30 if name:
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31 safe_unlink(name)
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32
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33 class BufferSizesTests(unittest.TestCase):
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34 def test_buffer_sizes(self):
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35 # First, run the tests with default and teeny buffer size.
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36 for round, bs in (0, 0), (1, 30):
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37 t1 = t2 = t3 = t4 = None
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38 try:
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39 t1 = writeTmp(1, ["Line %s of file 1\n" % (i+1) for i in range(15)])
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40 t2 = writeTmp(2, ["Line %s of file 2\n" % (i+1) for i in range(10)])
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41 t3 = writeTmp(3, ["Line %s of file 3\n" % (i+1) for i in range(5)])
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42 t4 = writeTmp(4, ["Line %s of file 4\n" % (i+1) for i in range(1)])
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43 self.buffer_size_test(t1, t2, t3, t4, bs, round)
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44 finally:
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45 remove_tempfiles(t1, t2, t3, t4)
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46
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47 def buffer_size_test(self, t1, t2, t3, t4, bs=0, round=0):
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48 pat = re.compile(r'LINE (\d+) OF FILE (\d+)')
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49
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50 start = 1 + round*6
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51 if verbose:
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52 print('%s. Simple iteration (bs=%s)' % (start+0, bs))
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53 fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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54 lines = list(fi)
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55 fi.close()
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56 self.assertEqual(len(lines), 31)
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57 self.assertEqual(lines[4], 'Line 5 of file 1\n')
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58 self.assertEqual(lines[30], 'Line 1 of file 4\n')
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59 self.assertEqual(fi.lineno(), 31)
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60 self.assertEqual(fi.filename(), t4)
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61
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62 if verbose:
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63 print('%s. Status variables (bs=%s)' % (start+1, bs))
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64 fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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65 s = "x"
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66 while s and s != 'Line 6 of file 2\n':
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67 s = fi.readline()
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68 self.assertEqual(fi.filename(), t2)
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69 self.assertEqual(fi.lineno(), 21)
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70 self.assertEqual(fi.filelineno(), 6)
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71 self.assertFalse(fi.isfirstline())
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72 self.assertFalse(fi.isstdin())
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73
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74 if verbose:
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75 print('%s. Nextfile (bs=%s)' % (start+2, bs))
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76 fi.nextfile()
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77 self.assertEqual(fi.readline(), 'Line 1 of file 3\n')
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78 self.assertEqual(fi.lineno(), 22)
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79 fi.close()
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80
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81 if verbose:
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82 print('%s. Stdin (bs=%s)' % (start+3, bs))
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83 fi = FileInput(files=(t1, t2, t3, t4, '-'), bufsize=bs)
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84 savestdin = sys.stdin
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85 try:
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86 sys.stdin = StringIO("Line 1 of stdin\nLine 2 of stdin\n")
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87 lines = list(fi)
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88 self.assertEqual(len(lines), 33)
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89 self.assertEqual(lines[32], 'Line 2 of stdin\n')
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90 self.assertEqual(fi.filename(), '<stdin>')
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91 fi.nextfile()
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92 finally:
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93 sys.stdin = savestdin
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94
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95 if verbose:
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96 print('%s. Boundary conditions (bs=%s)' % (start+4, bs))
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97 fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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98 self.assertEqual(fi.lineno(), 0)
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99 self.assertEqual(fi.filename(), None)
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100 fi.nextfile()
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101 self.assertEqual(fi.lineno(), 0)
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102 self.assertEqual(fi.filename(), None)
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103
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104 if verbose:
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105 print('%s. Inplace (bs=%s)' % (start+5, bs))
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106 savestdout = sys.stdout
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107 try:
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108 fi = FileInput(files=(t1, t2, t3, t4), inplace=1, bufsize=bs)
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109 for line in fi:
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110 line = line[:-1].upper()
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111 print(line)
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112 fi.close()
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113 finally:
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114 sys.stdout = savestdout
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115
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116 fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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117 for line in fi:
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118 self.assertEqual(line[-1], '\n')
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119 m = pat.match(line[:-1])
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120 self.assertNotEqual(m, None)
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121 self.assertEqual(int(m.group(1)), fi.filelineno())
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122 fi.close()
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123
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124 class FileInputTests(unittest.TestCase):
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125 def test_zero_byte_files(self):
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126 t1 = t2 = t3 = t4 = None
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127 try:
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128 t1 = writeTmp(1, [""])
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129 t2 = writeTmp(2, [""])
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130 t3 = writeTmp(3, ["The only line there is.\n"])
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131 t4 = writeTmp(4, [""])
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132 fi = FileInput(files=(t1, t2, t3, t4))
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133
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134 line = fi.readline()
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135 self.assertEqual(line, 'The only line there is.\n')
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136 self.assertEqual(fi.lineno(), 1)
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137 self.assertEqual(fi.filelineno(), 1)
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138 self.assertEqual(fi.filename(), t3)
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139
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140 line = fi.readline()
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141 self.assertFalse(line)
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142 self.assertEqual(fi.lineno(), 1)
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143 self.assertEqual(fi.filelineno(), 0)
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144 self.assertEqual(fi.filename(), t4)
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145 fi.close()
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146 finally:
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147 remove_tempfiles(t1, t2, t3, t4)
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148
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149 def test_files_that_dont_end_with_newline(self):
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150 t1 = t2 = None
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151 try:
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152 t1 = writeTmp(1, ["A\nB\nC"])
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153 t2 = writeTmp(2, ["D\nE\nF"])
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154 fi = FileInput(files=(t1, t2))
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155 lines = list(fi)
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156 self.assertEqual(lines, ["A\n", "B\n", "C", "D\n", "E\n", "F"])
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157 self.assertEqual(fi.filelineno(), 3)
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158 self.assertEqual(fi.lineno(), 6)
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159 finally:
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160 remove_tempfiles(t1, t2)
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161
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162 ## def test_unicode_filenames(self):
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163 ## # XXX A unicode string is always returned by writeTmp.
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164 ## # So is this needed?
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165 ## try:
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166 ## t1 = writeTmp(1, ["A\nB"])
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167 ## encoding = sys.getfilesystemencoding()
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168 ## if encoding is None:
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169 ## encoding = 'ascii'
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170 ## fi = FileInput(files=str(t1, encoding))
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171 ## lines = list(fi)
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172 ## self.assertEqual(lines, ["A\n", "B"])
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173 ## finally:
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174 ## remove_tempfiles(t1)
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175
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176 def test_fileno(self):
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177 t1 = t2 = None
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178 try:
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179 t1 = writeTmp(1, ["A\nB"])
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180 t2 = writeTmp(2, ["C\nD"])
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181 fi = FileInput(files=(t1, t2))
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182 self.assertEqual(fi.fileno(), -1)
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183 line =next( fi)
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184 self.assertNotEqual(fi.fileno(), -1)
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185 fi.nextfile()
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186 self.assertEqual(fi.fileno(), -1)
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187 line = list(fi)
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188 self.assertEqual(fi.fileno(), -1)
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189 finally:
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190 remove_tempfiles(t1, t2)
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191
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192 def test_opening_mode(self):
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193 try:
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194 # invalid mode, should raise ValueError
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195 fi = FileInput(mode="w")
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196 self.fail("FileInput should reject invalid mode argument")
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197 except ValueError:
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198 pass
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199 t1 = None
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200 try:
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201 # try opening in universal newline mode
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202 t1 = writeTmp(1, [b"A\nB\r\nC\rD"], mode="wb")
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203 fi = FileInput(files=t1, mode="U")
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204 lines = list(fi)
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205 self.assertEqual(lines, ["A\n", "B\n", "C\n", "D"])
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206 finally:
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207 remove_tempfiles(t1)
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208
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209 def test_file_opening_hook(self):
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210 try:
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211 # cannot use openhook and inplace mode
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212 fi = FileInput(inplace=1, openhook=lambda f, m: None)
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213 self.fail("FileInput should raise if both inplace "
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214 "and openhook arguments are given")
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215 except ValueError:
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216 pass
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217 try:
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218 fi = FileInput(openhook=1)
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219 self.fail("FileInput should check openhook for being callable")
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220 except ValueError:
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221 pass
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222 # XXX The rot13 codec was removed.
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223 # So this test needs to be changed to use something else.
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224 # (Or perhaps the API needs to change so we can just pass
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225 # an encoding rather than using a hook?)
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226 ## try:
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227 ## t1 = writeTmp(1, ["A\nB"], mode="wb")
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228 ## fi = FileInput(files=t1, openhook=hook_encoded("rot13"))
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229 ## lines = list(fi)
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230 ## self.assertEqual(lines, ["N\n", "O"])
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231 ## finally:
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232 ## remove_tempfiles(t1)
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233
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234 def test_context_manager(self):
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235 try:
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236 t1 = writeTmp(1, ["A\nB\nC"])
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237 t2 = writeTmp(2, ["D\nE\nF"])
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238 with FileInput(files=(t1, t2)) as fi:
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239 lines = list(fi)
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240 self.assertEqual(lines, ["A\n", "B\n", "C", "D\n", "E\n", "F"])
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241 self.assertEqual(fi.filelineno(), 3)
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242 self.assertEqual(fi.lineno(), 6)
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243 self.assertEqual(fi._files, ())
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244 finally:
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245 remove_tempfiles(t1, t2)
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246
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247 def test_close_on_exception(self):
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248 try:
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249 t1 = writeTmp(1, [""])
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250 with FileInput(files=t1) as fi:
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251 raise IOError
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252 except IOError:
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253 self.assertEqual(fi._files, ())
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254 finally:
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255 remove_tempfiles(t1)
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256
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257
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258 def test_main():
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259 run_unittest(BufferSizesTests, FileInputTests)
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260
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261 if __name__ == "__main__":
06145fbc7ab9 Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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262 test_main()