Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_linecache.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 47bc3509f76b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 """ Tests for the linecache module """
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3 import linecache
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4 import unittest
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5 import os.path
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6 from test import test_support as support
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9 FILENAME = linecache.__file__
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10 INVALID_NAME = '!@$)(!@#_1'
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11 EMPTY = ''
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12 TESTS = 'inspect_fodder inspect_fodder2 mapping_tests'
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13 TESTS = TESTS.split()
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14 TEST_PATH = os.path.dirname(support.__file__)
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15 MODULES = "linecache abc".split()
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16 MODULE_PATH = os.path.dirname(FILENAME)
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18 SOURCE_1 = '''
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19 " Docstring "
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21 def function():
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22 return result
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24 '''
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26 SOURCE_2 = '''
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27 def f():
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28 return 1 + 1
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30 a = f()
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32 '''
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33
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34 SOURCE_3 = '''
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35 def f():
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36 return 3''' # No ending newline
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38
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39 class LineCacheTests(unittest.TestCase):
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41 def test_getline(self):
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42 getline = linecache.getline
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44 # Bad values for line number should return an empty string
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45 self.assertEqual(getline(FILENAME, 2**15), EMPTY)
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46 self.assertEqual(getline(FILENAME, -1), EMPTY)
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48 # Float values currently raise TypeError, should it?
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49 self.assertRaises(TypeError, getline, FILENAME, 1.1)
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51 # Bad filenames should return an empty string
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52 self.assertEqual(getline(EMPTY, 1), EMPTY)
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53 self.assertEqual(getline(INVALID_NAME, 1), EMPTY)
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55 # Check whether lines correspond to those from file iteration
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56 for entry in TESTS:
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57 filename = os.path.join(TEST_PATH, entry) + '.py'
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58 for index, line in enumerate(open(filename)):
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59 self.assertEqual(line, getline(filename, index + 1))
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61 # Check module loading
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62 for entry in MODULES:
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63 filename = os.path.join(MODULE_PATH, entry) + '.py'
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64 for index, line in enumerate(open(filename)):
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65 self.assertEqual(line, getline(filename, index + 1))
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67 # Check that bogus data isn't returned (issue #1309567)
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68 empty = linecache.getlines('a/b/c/__init__.py')
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69 self.assertEqual(empty, [])
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70
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71 def test_no_ending_newline(self):
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72 self.addCleanup(support.unlink, support.TESTFN)
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73 with open(support.TESTFN, "w") as fp:
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74 fp.write(SOURCE_3)
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75 lines = linecache.getlines(support.TESTFN)
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76 self.assertEqual(lines, ["\n", "def f():\n", " return 3\n"])
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77
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78 def test_clearcache(self):
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79 cached = []
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80 for entry in TESTS:
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81 filename = os.path.join(TEST_PATH, entry) + '.py'
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82 cached.append(filename)
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83 linecache.getline(filename, 1)
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84
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85 # Are all files cached?
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86 cached_empty = [fn for fn in cached if fn not in linecache.cache]
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87 self.assertEqual(cached_empty, [])
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88
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89 # Can we clear the cache?
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90 linecache.clearcache()
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91 cached_empty = [fn for fn in cached if fn in linecache.cache]
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92 self.assertEqual(cached_empty, [])
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93
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94 def test_checkcache(self):
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95 getline = linecache.getline
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96 # Create a source file and cache its contents
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97 source_name = support.TESTFN + '.py'
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98 self.addCleanup(support.unlink, source_name)
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99 with open(source_name, 'w') as source:
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100 source.write(SOURCE_1)
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101 getline(source_name, 1)
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102
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103 # Keep a copy of the old contents
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104 source_list = []
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105 with open(source_name) as source:
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106 for index, line in enumerate(source):
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107 self.assertEqual(line, getline(source_name, index + 1))
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108 source_list.append(line)
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109
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110 with open(source_name, 'w') as source:
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111 source.write(SOURCE_2)
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112
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113 # Try to update a bogus cache entry
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114 linecache.checkcache('dummy')
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115
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116 # Check that the cache matches the old contents
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117 for index, line in enumerate(source_list):
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118 self.assertEqual(line, getline(source_name, index + 1))
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119
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120 # Update the cache and check whether it matches the new source file
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121 linecache.checkcache(source_name)
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122 with open(source_name) as source:
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123 for index, line in enumerate(source):
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124 self.assertEqual(line, getline(source_name, index + 1))
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125 source_list.append(line)
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126
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127 def test_main():
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128 support.run_unittest(LineCacheTests)
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129
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130 if __name__ == "__main__":
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131 test_main()