Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_fileinput.py @ 80661:94de77bd0b4b 2.7

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Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.
author Andrew Svetlov <andrew.svetlov@gmail.com>
date Thu, 29 Nov 2012 19:51:28 +0200
parents 6768b2350c57
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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.test_support import verbose, TESTFN, run_unittest
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8 from test.test_support import unlink as safe_unlink
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9 import sys, re
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10 from StringIO 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 f.writelines(lines)
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24 f.close()
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25 return name
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26
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27 def remove_tempfiles(*names):
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28 for name in names:
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29 safe_unlink(name)
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30
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31 class BufferSizesTests(unittest.TestCase):
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32 def test_buffer_sizes(self):
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33 # First, run the tests with default and teeny buffer size.
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34 for round, bs in (0, 0), (1, 30):
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35 try:
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36 t1 = writeTmp(1, ["Line %s of file 1\n" % (i+1) for i in range(15)])
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37 t2 = writeTmp(2, ["Line %s of file 2\n" % (i+1) for i in range(10)])
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38 t3 = writeTmp(3, ["Line %s of file 3\n" % (i+1) for i in range(5)])
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39 t4 = writeTmp(4, ["Line %s of file 4\n" % (i+1) for i in range(1)])
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40 self.buffer_size_test(t1, t2, t3, t4, bs, round)
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41 finally:
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42 remove_tempfiles(t1, t2, t3, t4)
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43
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44 def buffer_size_test(self, t1, t2, t3, t4, bs=0, round=0):
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45 pat = re.compile(r'LINE (\d+) OF FILE (\d+)')
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46
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47 start = 1 + round*6
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48 if verbose:
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49 print '%s. Simple iteration (bs=%s)' % (start+0, bs)
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50 fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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51 lines = list(fi)
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52 fi.close()
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53 self.assertEqual(len(lines), 31)
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54 self.assertEqual(lines[4], 'Line 5 of file 1\n')
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55 self.assertEqual(lines[30], 'Line 1 of file 4\n')
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56 self.assertEqual(fi.lineno(), 31)
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57 self.assertEqual(fi.filename(), t4)
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58
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59 if verbose:
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60 print '%s. Status variables (bs=%s)' % (start+1, bs)
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61 fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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62 s = "x"
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63 while s and s != 'Line 6 of file 2\n':
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64 s = fi.readline()
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65 self.assertEqual(fi.filename(), t2)
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66 self.assertEqual(fi.lineno(), 21)
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67 self.assertEqual(fi.filelineno(), 6)
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68 self.assertFalse(fi.isfirstline())
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69 self.assertFalse(fi.isstdin())
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70
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71 if verbose:
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72 print '%s. Nextfile (bs=%s)' % (start+2, bs)
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73 fi.nextfile()
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74 self.assertEqual(fi.readline(), 'Line 1 of file 3\n')
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75 self.assertEqual(fi.lineno(), 22)
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76 fi.close()
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77
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78 if verbose:
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79 print '%s. Stdin (bs=%s)' % (start+3, bs)
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80 fi = FileInput(files=(t1, t2, t3, t4, '-'), bufsize=bs)
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81 savestdin = sys.stdin
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82 try:
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83 sys.stdin = StringIO("Line 1 of stdin\nLine 2 of stdin\n")
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84 lines = list(fi)
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85 self.assertEqual(len(lines), 33)
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86 self.assertEqual(lines[32], 'Line 2 of stdin\n')
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87 self.assertEqual(fi.filename(), '<stdin>')
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88 fi.nextfile()
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89 finally:
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90 sys.stdin = savestdin
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91
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92 if verbose:
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93 print '%s. Boundary conditions (bs=%s)' % (start+4, bs)
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94 fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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95 self.assertEqual(fi.lineno(), 0)
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96 self.assertEqual(fi.filename(), None)
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97 fi.nextfile()
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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
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101 if verbose:
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102 print '%s. Inplace (bs=%s)' % (start+5, bs)
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103 savestdout = sys.stdout
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104 try:
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105 fi = FileInput(files=(t1, t2, t3, t4), inplace=1, bufsize=bs)
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106 for line in fi:
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107 line = line[:-1].upper()
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108 print line
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109 fi.close()
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110 finally:
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111 sys.stdout = savestdout
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112
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113 fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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114 for line in fi:
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115 self.assertEqual(line[-1], '\n')
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116 m = pat.match(line[:-1])
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117 self.assertNotEqual(m, None)
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118 self.assertEqual(int(m.group(1)), fi.filelineno())
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119 fi.close()
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120
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121 class FileInputTests(unittest.TestCase):
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122 def test_zero_byte_files(self):
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123 try:
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124 t1 = writeTmp(1, [""])
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125 t2 = writeTmp(2, [""])
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126 t3 = writeTmp(3, ["The only line there is.\n"])
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127 t4 = writeTmp(4, [""])
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128 fi = FileInput(files=(t1, t2, t3, t4))
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129
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130 line = fi.readline()
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131 self.assertEqual(line, 'The only line there is.\n')
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132 self.assertEqual(fi.lineno(), 1)
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133 self.assertEqual(fi.filelineno(), 1)
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134 self.assertEqual(fi.filename(), t3)
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135
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136 line = fi.readline()
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6768b2350c57 convert usage of fail* to assert*
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137 self.assertFalse(line)
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138 self.assertEqual(fi.lineno(), 1)
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139 self.assertEqual(fi.filelineno(), 0)
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140 self.assertEqual(fi.filename(), t4)
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141 fi.close()
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142 finally:
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143 remove_tempfiles(t1, t2, t3, t4)
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e061155f99e8 SF patch #440170: Tests for fileinput module.
Tim Peters <tim.peters@gmail.com>
parents:
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144
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145 def test_files_that_dont_end_with_newline(self):
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146 try:
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147 t1 = writeTmp(1, ["A\nB\nC"])
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148 t2 = writeTmp(2, ["D\nE\nF"])
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149 fi = FileInput(files=(t1, t2))
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150 lines = list(fi)
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151 self.assertEqual(lines, ["A\n", "B\n", "C", "D\n", "E\n", "F"])
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152 self.assertEqual(fi.filelineno(), 3)
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153 self.assertEqual(fi.lineno(), 6)
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154 finally:
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155 remove_tempfiles(t1, t2)
36590
0d5f8077bd24 Patch #1337756: fileinput now accepts Unicode filenames.
Georg Brandl <georg@python.org>
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156
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157 def test_unicode_filenames(self):
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158 try:
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159 t1 = writeTmp(1, ["A\nB"])
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160 encoding = sys.getfilesystemencoding()
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161 if encoding is None:
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162 encoding = 'ascii'
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163 fi = FileInput(files=unicode(t1, encoding))
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164 lines = list(fi)
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165 self.assertEqual(lines, ["A\n", "B"])
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166 finally:
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167 remove_tempfiles(t1)
36594
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
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168
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169 def test_fileno(self):
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170 try:
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171 t1 = writeTmp(1, ["A\nB"])
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172 t2 = writeTmp(2, ["C\nD"])
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173 fi = FileInput(files=(t1, t2))
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174 self.assertEqual(fi.fileno(), -1)
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175 line = fi.next()
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176 self.assertNotEqual(fi.fileno(), -1)
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177 fi.nextfile()
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178 self.assertEqual(fi.fileno(), -1)
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179 line = list(fi)
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180 self.assertEqual(fi.fileno(), -1)
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181 finally:
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182 remove_tempfiles(t1, t2)
36595
c6fba456227b Patch #1212287: fileinput.input() now has a mode parameter for
Georg Brandl <georg@python.org>
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183
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184 def test_opening_mode(self):
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185 try:
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186 # invalid mode, should raise ValueError
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187 fi = FileInput(mode="w")
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188 self.fail("FileInput should reject invalid mode argument")
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189 except ValueError:
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190 pass
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191 try:
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192 # try opening in universal newline mode
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193 t1 = writeTmp(1, ["A\nB\r\nC\rD"], mode="wb")
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194 fi = FileInput(files=t1, mode="U")
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195 lines = list(fi)
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196 self.assertEqual(lines, ["A\n", "B\n", "C\n", "D"])
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197 finally:
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198 remove_tempfiles(t1)
36596
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
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199
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200 def test_file_opening_hook(self):
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201 try:
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202 # cannot use openhook and inplace mode
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203 fi = FileInput(inplace=1, openhook=lambda f,m: None)
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204 self.fail("FileInput should raise if both inplace "
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205 "and openhook arguments are given")
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206 except ValueError:
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207 pass
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208 try:
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209 fi = FileInput(openhook=1)
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210 self.fail("FileInput should check openhook for being callable")
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211 except ValueError:
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212 pass
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213 try:
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214 t1 = writeTmp(1, ["A\nB"], mode="wb")
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215 fi = FileInput(files=t1, openhook=hook_encoded("rot13"))
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216 lines = list(fi)
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217 self.assertEqual(lines, ["N\n", "O"])
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218 finally:
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219 remove_tempfiles(t1)
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220
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221 def test_main():
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222 run_unittest(BufferSizesTests, FileInputTests)
41532
4b9fa8092e82 Whitespace normalization. Ugh, we really need to do this more often.
Neal Norwitz <nnorwitz@gmail.com>
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223
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224 if __name__ == "__main__":
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225 test_main()