Mercurial > cpython-lru_cache-weakref

annotate Lib/lib2to3/tests/test_refactor.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 119e4323400d
children 732f72cbaf7d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """
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2 Unit tests for refactor.py.
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3 """
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4
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5 import sys
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6 import os
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7 import operator
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8 import StringIO
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9 import tempfile
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10 import unittest
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11
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12 from lib2to3 import refactor, pygram, fixer_base
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13
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14 from . import support
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15
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16
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17 TEST_DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
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18 FIXER_DIR = os.path.join(TEST_DATA_DIR, "fixers")
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19
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20 sys.path.append(FIXER_DIR)
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21 try:
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22 _DEFAULT_FIXERS = refactor.get_fixers_from_package("myfixes")
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23 finally:
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24 sys.path.pop()
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25
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26 _2TO3_FIXERS = refactor.get_fixers_from_package("lib2to3.fixes")
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27
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28 class TestRefactoringTool(unittest.TestCase):
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29
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30 def setUp(self):
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31 sys.path.append(FIXER_DIR)
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32
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33 def tearDown(self):
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34 sys.path.pop()
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35
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36 def check_instances(self, instances, classes):
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37 for inst, cls in zip(instances, classes):
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38 if not isinstance(inst, cls):
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39 self.fail("%s are not instances of %s" % instances, classes)
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40
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41 def rt(self, options=None, fixers=_DEFAULT_FIXERS, explicit=None):
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42 return refactor.RefactoringTool(fixers, options, explicit)
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43
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44 def test_print_function_option(self):
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45 gram = pygram.python_grammar
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46 save = gram.keywords["print"]
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47 try:
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48 rt = self.rt({"print_function" : True})
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49 self.assertRaises(KeyError, operator.itemgetter("print"),
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50 gram.keywords)
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51 finally:
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52 gram.keywords["print"] = save
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53
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54 def test_fixer_loading_helpers(self):
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55 contents = ["explicit", "first", "last", "parrot", "preorder"]
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56 non_prefixed = refactor.get_all_fix_names("myfixes")
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57 prefixed = refactor.get_all_fix_names("myfixes", False)
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58 full_names = refactor.get_fixers_from_package("myfixes")
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59 self.assertEqual(prefixed, ["fix_" + name for name in contents])
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60 self.assertEqual(non_prefixed, contents)
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61 self.assertEqual(full_names,
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62 ["myfixes.fix_" + name for name in contents])
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63
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64 def test_get_headnode_dict(self):
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65 class NoneFix(fixer_base.BaseFix):
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66 PATTERN = None
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67
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68 class FileInputFix(fixer_base.BaseFix):
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69 PATTERN = "file_input< any * >"
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70
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71 no_head = NoneFix({}, [])
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72 with_head = FileInputFix({}, [])
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73 d = refactor.get_headnode_dict([no_head, with_head])
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74 expected = {None: [no_head],
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75 pygram.python_symbols.file_input : [with_head]}
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76 self.assertEqual(d, expected)
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77
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78 def test_fixer_loading(self):
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79 from myfixes.fix_first import FixFirst
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80 from myfixes.fix_last import FixLast
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81 from myfixes.fix_parrot import FixParrot
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82 from myfixes.fix_preorder import FixPreorder
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83
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84 rt = self.rt()
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85 pre, post = rt.get_fixers()
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86
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87 self.check_instances(pre, [FixPreorder])
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88 self.check_instances(post, [FixFirst, FixParrot, FixLast])
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89
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90 def test_naughty_fixers(self):
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91 self.assertRaises(ImportError, self.rt, fixers=["not_here"])
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92 self.assertRaises(refactor.FixerError, self.rt, fixers=["no_fixer_cls"])
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93 self.assertRaises(refactor.FixerError, self.rt, fixers=["bad_order"])
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94
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95 def test_refactor_string(self):
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96 rt = self.rt()
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97 input = "def parrot(): pass\n\n"
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98 tree = rt.refactor_string(input, "<test>")
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99 self.assertNotEqual(str(tree), input)
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100
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101 input = "def f(): pass\n\n"
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102 tree = rt.refactor_string(input, "<test>")
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103 self.assertEqual(str(tree), input)
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104
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105 def test_refactor_stdin(self):
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106
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107 class MyRT(refactor.RefactoringTool):
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108
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109 def print_output(self, lines):
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110 diff_lines.extend(lines)
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111
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112 diff_lines = []
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113 rt = MyRT(_DEFAULT_FIXERS)
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114 save = sys.stdin
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115 sys.stdin = StringIO.StringIO("def parrot(): pass\n\n")
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116 try:
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117 rt.refactor_stdin()
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118 finally:
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119 sys.stdin = save
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120 expected = """--- <stdin> (original)
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121 +++ <stdin> (refactored)
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122 @@ -1,2 +1,2 @@
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123 -def parrot(): pass
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124 +def cheese(): pass""".splitlines()
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125 self.assertEqual(diff_lines[:-1], expected)
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126
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127 def check_file_refactoring(self, test_file, fixers=_2TO3_FIXERS):
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128 def read_file():
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129 with open(test_file, "rb") as fp:
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130 return fp.read()
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131 old_contents = read_file()
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132 rt = self.rt(fixers=fixers)
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133
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134 rt.refactor_file(test_file)
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135 self.assertEqual(old_contents, read_file())
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136
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137 try:
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138 rt.refactor_file(test_file, True)
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139 self.assertNotEqual(old_contents, read_file())
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140 finally:
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141 with open(test_file, "wb") as fp:
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142 fp.write(old_contents)
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143
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144 def test_refactor_file(self):
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145 test_file = os.path.join(FIXER_DIR, "parrot_example.py")
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146 self.check_file_refactoring(test_file, _DEFAULT_FIXERS)
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147
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148 def test_file_encoding(self):
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149 fn = os.path.join(TEST_DATA_DIR, "different_encoding.py")
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150 self.check_file_refactoring(fn)
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151
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152 def test_crlf_newlines(self):
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153 old_sep = os.linesep
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154 os.linesep = "\r\n"
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155 try:
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156 fn = os.path.join(TEST_DATA_DIR, "crlf.py")
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157 fixes = refactor.get_fixers_from_package("lib2to3.fixes")
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158 self.check_file_refactoring(fn, fixes)
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159 finally:
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160 os.linesep = old_sep
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161
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162 def test_refactor_docstring(self):
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163 rt = self.rt()
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164
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165 def example():
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166 """
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167 >>> example()
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168 42
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169 """
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170 out = rt.refactor_docstring(example.__doc__, "<test>")
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171 self.assertEqual(out, example.__doc__)
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172
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173 def parrot():
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174 """
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175 >>> def parrot():
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176 ... return 43
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177 """
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178 out = rt.refactor_docstring(parrot.__doc__, "<test>")
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179 self.assertNotEqual(out, parrot.__doc__)
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180
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181 def test_explicit(self):
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182 from myfixes.fix_explicit import FixExplicit
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183
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184 rt = self.rt(fixers=["myfixes.fix_explicit"])
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185 self.assertEqual(len(rt.post_order), 0)
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186
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187 rt = self.rt(explicit=["myfixes.fix_explicit"])
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188 for fix in rt.post_order:
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189 if isinstance(fix, FixExplicit):
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190 break
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191 else:
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192 self.fail("explicit fixer not loaded")