Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/lxml/doctestcompare.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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1 """
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2 lxml-based doctest output comparison.
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3
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4 Note: normally, you should just import the `lxml.usedoctest` and
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5 `lxml.html.usedoctest` modules from within a doctest, instead of this
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6 one::
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7
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8 >>> import lxml.usedoctest # for XML output
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9
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10 >>> import lxml.html.usedoctest # for HTML output
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11
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12 To use this module directly, you must call ``lxmldoctest.install()``,
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13 which will cause doctest to use this in all subsequent calls.
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14
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15 This changes the way output is checked and comparisons are made for
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16 XML or HTML-like content.
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17
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18 XML or HTML content is noticed because the example starts with ``<``
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19 (it's HTML if it starts with ``<html``). You can also use the
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20 ``PARSE_HTML`` and ``PARSE_XML`` flags to force parsing.
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21
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22 Some rough wildcard-like things are allowed. Whitespace is generally
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23 ignored (except in attributes). In text (attributes and text in the
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24 body) you can use ``...`` as a wildcard. In an example it also
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25 matches any trailing tags in the element, though it does not match
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26 leading tags. You may create a tag ``<any>`` or include an ``any``
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27 attribute in the tag. An ``any`` tag matches any tag, while the
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28 attribute matches any and all attributes.
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29
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30 When a match fails, the reformatted example and gotten text is
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31 displayed (indented), and a rough diff-like output is given. Anything
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32 marked with ``+`` is in the output but wasn't supposed to be, and
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33 similarly ``-`` means its in the example but wasn't in the output.
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34
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35 You can disable parsing on one line with ``# doctest:+NOPARSE_MARKUP``
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36 """
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37
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38 from lxml import etree
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39 import sys
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40 import re
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41 import doctest
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42 try:
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43 from html import escape as html_escape
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44 except ImportError:
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45 from cgi import escape as html_escape
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46
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47 __all__ = ['PARSE_HTML', 'PARSE_XML', 'NOPARSE_MARKUP', 'LXMLOutputChecker',
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48 'LHTMLOutputChecker', 'install', 'temp_install']
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49
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50 try:
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51 _basestring = basestring
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52 except NameError:
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53 _basestring = (str, bytes)
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54
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55 _IS_PYTHON_3 = sys.version_info[0] >= 3
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56
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57 PARSE_HTML = doctest.register_optionflag('PARSE_HTML')
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58 PARSE_XML = doctest.register_optionflag('PARSE_XML')
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59 NOPARSE_MARKUP = doctest.register_optionflag('NOPARSE_MARKUP')
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60
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61 OutputChecker = doctest.OutputChecker
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62
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63 def strip(v):
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64 if v is None:
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65 return None
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66 else:
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67 return v.strip()
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68
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69 def norm_whitespace(v):
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70 return _norm_whitespace_re.sub(' ', v)
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71
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72 _html_parser = etree.HTMLParser(recover=False, remove_blank_text=True)
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73
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74 def html_fromstring(html):
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75 return etree.fromstring(html, _html_parser)
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76
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77 # We use this to distinguish repr()s from elements:
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78 _repr_re = re.compile(r'^<[^>]+ (at|object) ')
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79 _norm_whitespace_re = re.compile(r'[ \t\n][ \t\n]+')
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80
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81 class LXMLOutputChecker(OutputChecker):
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82
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83 empty_tags = (
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84 'param', 'img', 'area', 'br', 'basefont', 'input',
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85 'base', 'meta', 'link', 'col')
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86
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87 def get_default_parser(self):
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88 return etree.XML
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89
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90 def check_output(self, want, got, optionflags):
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91 alt_self = getattr(self, '_temp_override_self', None)
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92 if alt_self is not None:
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93 super_method = self._temp_call_super_check_output
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94 self = alt_self
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95 else:
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96 super_method = OutputChecker.check_output
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97 parser = self.get_parser(want, got, optionflags)
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98 if not parser:
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99 return super_method(
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100 self, want, got, optionflags)
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101 try:
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102 want_doc = parser(want)
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103 except etree.XMLSyntaxError:
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104 return False
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105 try:
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106 got_doc = parser(got)
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107 except etree.XMLSyntaxError:
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108 return False
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109 return self.compare_docs(want_doc, got_doc)
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110
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111 def get_parser(self, want, got, optionflags):
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112 parser = None
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113 if NOPARSE_MARKUP & optionflags:
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114 return None
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115 if PARSE_HTML & optionflags:
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116 parser = html_fromstring
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117 elif PARSE_XML & optionflags:
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118 parser = etree.XML
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119 elif (want.strip().lower().startswith('<html')
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120 and got.strip().startswith('<html')):
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121 parser = html_fromstring
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122 elif (self._looks_like_markup(want)
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123 and self._looks_like_markup(got)):
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124 parser = self.get_default_parser()
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125 return parser
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126
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127 def _looks_like_markup(self, s):
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128 s = s.strip()
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129 return (s.startswith('<')
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130 and not _repr_re.search(s))
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131
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132 def compare_docs(self, want, got):
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133 if not self.tag_compare(want.tag, got.tag):
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134 return False
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135 if not self.text_compare(want.text, got.text, True):
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136 return False
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137 if not self.text_compare(want.tail, got.tail, True):
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138 return False
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139 if 'any' not in want.attrib:
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140 want_keys = sorted(want.attrib.keys())
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141 got_keys = sorted(got.attrib.keys())
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142 if want_keys != got_keys:
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143 return False
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144 for key in want_keys:
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145 if not self.text_compare(want.attrib[key], got.attrib[key], False):
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146 return False
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147 if want.text != '...' or len(want):
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148 want_children = list(want)
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149 got_children = list(got)
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150 while want_children or got_children:
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151 if not want_children or not got_children:
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152 return False
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153 want_first = want_children.pop(0)
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154 got_first = got_children.pop(0)
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155 if not self.compare_docs(want_first, got_first):
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156 return False
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157 if not got_children and want_first.tail == '...':
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158 break
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159 return True
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160
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161 def text_compare(self, want, got, strip):
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162 want = want or ''
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163 got = got or ''
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164 if strip:
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165 want = norm_whitespace(want).strip()
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166 got = norm_whitespace(got).strip()
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167 want = '^%s$' % re.escape(want)
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168 want = want.replace(r'\.\.\.', '.*')
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169 if re.search(want, got):
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170 return True
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171 else:
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172 return False
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173
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174 def tag_compare(self, want, got):
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175 if want == 'any':
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176 return True
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177 if (not isinstance(want, _basestring)
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178 or not isinstance(got, _basestring)):
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179 return want == got
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180 want = want or ''
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181 got = got or ''
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182 if want.startswith('{...}'):
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183 # Ellipsis on the namespace
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184 return want.split('}')[-1] == got.split('}')[-1]
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185 else:
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186 return want == got
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187
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188 def output_difference(self, example, got, optionflags):
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189 want = example.want
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190 parser = self.get_parser(want, got, optionflags)
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191 errors = []
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192 if parser is not None:
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193 try:
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194 want_doc = parser(want)
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195 except etree.XMLSyntaxError:
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196 e = sys.exc_info()[1]
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197 errors.append('In example: %s' % e)
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198 try:
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199 got_doc = parser(got)
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200 except etree.XMLSyntaxError:
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201 e = sys.exc_info()[1]
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202 errors.append('In actual output: %s' % e)
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203 if parser is None or errors:
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204 value = OutputChecker.output_difference(
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205 self, example, got, optionflags)
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206 if errors:
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207 errors.append(value)
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208 return '\n'.join(errors)
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209 else:
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210 return value
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211 html = parser is html_fromstring
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212 diff_parts = ['Expected:',
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213 self.format_doc(want_doc, html, 2),
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214 'Got:',
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215 self.format_doc(got_doc, html, 2),
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216 'Diff:',
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217 self.collect_diff(want_doc, got_doc, html, 2)]
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218 return '\n'.join(diff_parts)
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219
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220 def html_empty_tag(self, el, html=True):
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221 if not html:
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222 return False
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223 if el.tag not in self.empty_tags:
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224 return False
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225 if el.text or len(el):
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226 # This shouldn't happen (contents in an empty tag)
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227 return False
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228 return True
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229
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230 def format_doc(self, doc, html, indent, prefix=''):
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231 parts = []
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232 if not len(doc):
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233 # No children...
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234 parts.append(' '*indent)
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235 parts.append(prefix)
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236 parts.append(self.format_tag(doc))
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237 if not self.html_empty_tag(doc, html):
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238 if strip(doc.text):
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239 parts.append(self.format_text(doc.text))
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240 parts.append(self.format_end_tag(doc))
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241 if strip(doc.tail):
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242 parts.append(self.format_text(doc.tail))
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243 parts.append('\n')
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244 return ''.join(parts)
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245 parts.append(' '*indent)
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246 parts.append(prefix)
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247 parts.append(self.format_tag(doc))
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248 if not self.html_empty_tag(doc, html):
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249 parts.append('\n')
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250 if strip(doc.text):
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251 parts.append(' '*indent)
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252 parts.append(self.format_text(doc.text))
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253 parts.append('\n')
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254 for el in doc:
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255 parts.append(self.format_doc(el, html, indent+2))
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parents:
diff changeset
256 parts.append(' '*indent)
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parents:
diff changeset
257 parts.append(self.format_end_tag(doc))
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parents:
diff changeset
258 parts.append('\n')
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parents:
diff changeset
259 if strip(doc.tail):
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parents:
diff changeset
260 parts.append(' '*indent)
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diff changeset
261 parts.append(self.format_text(doc.tail))
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parents:
diff changeset
262 parts.append('\n')
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parents:
diff changeset
263 return ''.join(parts)
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264
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diff changeset
265 def format_text(self, text, strip=True):
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266 if text is None:
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267 return ''
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268 if strip:
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269 text = text.strip()
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270 return html_escape(text, 1)
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271
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272 def format_tag(self, el):
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273 attrs = []
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274 if isinstance(el, etree.CommentBase):
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275 # FIXME: probably PIs should be handled specially too?
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276 return '<!--'
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277 for name, value in sorted(el.attrib.items()):
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278 attrs.append('%s="%s"' % (name, self.format_text(value, False)))
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279 if not attrs:
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280 return '<%s>' % el.tag
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281 return '<%s %s>' % (el.tag, ' '.join(attrs))
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282
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283 def format_end_tag(self, el):
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284 if isinstance(el, etree.CommentBase):
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diff changeset
285 # FIXME: probably PIs should be handled specially too?
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286 return '-->'
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287 return '</%s>' % el.tag
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288
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289 def collect_diff(self, want, got, html, indent):
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290 parts = []
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291 if not len(want) and not len(got):
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292 parts.append(' '*indent)
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293 parts.append(self.collect_diff_tag(want, got))
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294 if not self.html_empty_tag(got, html):
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295 parts.append(self.collect_diff_text(want.text, got.text))
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296 parts.append(self.collect_diff_end_tag(want, got))
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297 parts.append(self.collect_diff_text(want.tail, got.tail))
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298 parts.append('\n')
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299 return ''.join(parts)
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300 parts.append(' '*indent)
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301 parts.append(self.collect_diff_tag(want, got))
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302 parts.append('\n')
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diff changeset
303 if strip(want.text) or strip(got.text):
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304 parts.append(' '*indent)
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diff changeset
305 parts.append(self.collect_diff_text(want.text, got.text))
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306 parts.append('\n')
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307 want_children = list(want)
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308 got_children = list(got)
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309 while want_children or got_children:
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310 if not want_children:
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311 parts.append(self.format_doc(got_children.pop(0), html, indent+2, '+'))
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312 continue
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313 if not got_children:
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314 parts.append(self.format_doc(want_children.pop(0), html, indent+2, '-'))
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315 continue
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316 parts.append(self.collect_diff(
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diff changeset
317 want_children.pop(0), got_children.pop(0), html, indent+2))
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318 parts.append(' '*indent)
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319 parts.append(self.collect_diff_end_tag(want, got))
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320 parts.append('\n')
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321 if strip(want.tail) or strip(got.tail):
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322 parts.append(' '*indent)
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parents:
diff changeset
323 parts.append(self.collect_diff_text(want.tail, got.tail))
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324 parts.append('\n')
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325 return ''.join(parts)
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326
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327 def collect_diff_tag(self, want, got):
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328 if not self.tag_compare(want.tag, got.tag):
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329 tag = '%s (got: %s)' % (want.tag, got.tag)
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330 else:
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331 tag = got.tag
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332 attrs = []
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333 any = want.tag == 'any' or 'any' in want.attrib
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334 for name, value in sorted(got.attrib.items()):
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335 if name not in want.attrib and not any:
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diff changeset
336 attrs.append('+%s="%s"' % (name, self.format_text(value, False)))
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diff changeset
337 else:
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338 if name in want.attrib:
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339 text = self.collect_diff_text(want.attrib[name], value, False)
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diff changeset
340 else:
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341 text = self.format_text(value, False)
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342 attrs.append('%s="%s"' % (name, text))
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343 if not any:
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344 for name, value in sorted(want.attrib.items()):
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345 if name in got.attrib:
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diff changeset
346 continue
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347 attrs.append('-%s="%s"' % (name, self.format_text(value, False)))
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348 if attrs:
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diff changeset
349 tag = '<%s %s>' % (tag, ' '.join(attrs))
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350 else:
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351 tag = '<%s>' % tag
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352 return tag
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353
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354 def collect_diff_end_tag(self, want, got):
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355 if want.tag != got.tag:
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diff changeset
356 tag = '%s (got: %s)' % (want.tag, got.tag)
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357 else:
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358 tag = got.tag
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359 return '</%s>' % tag
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diff changeset
360
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361 def collect_diff_text(self, want, got, strip=True):
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362 if self.text_compare(want, got, strip):
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diff changeset
363 if not got:
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364 return ''
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diff changeset
365 return self.format_text(got, strip)
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366 text = '%s (got: %s)' % (want, got)
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367 return self.format_text(text, strip)
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368
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369 class LHTMLOutputChecker(LXMLOutputChecker):
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370 def get_default_parser(self):
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371 return html_fromstring
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372
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373 def install(html=False):
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374 """
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375 Install doctestcompare for all future doctests.
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376
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377 If html is true, then by default the HTML parser will be used;
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378 otherwise the XML parser is used.
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379 """
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380 if html:
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381 doctest.OutputChecker = LHTMLOutputChecker
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diff changeset
382 else:
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383 doctest.OutputChecker = LXMLOutputChecker
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384
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385 def temp_install(html=False, del_module=None):
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386 """
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387 Use this *inside* a doctest to enable this checker for this
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388 doctest only.
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389
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390 If html is true, then by default the HTML parser will be used;
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391 otherwise the XML parser is used.
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392 """
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393 if html:
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394 Checker = LHTMLOutputChecker
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395 else:
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396 Checker = LXMLOutputChecker
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397 frame = _find_doctest_frame()
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398 dt_self = frame.f_locals['self']
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399 checker = Checker()
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400 old_checker = dt_self._checker
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401 dt_self._checker = checker
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402 # The unfortunate thing is that there is a local variable 'check'
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403 # in the function that runs the doctests, that is a bound method
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404 # into the output checker. We have to update that. We can't
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405 # modify the frame, so we have to modify the object in place. The
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406 # only way to do this is to actually change the func_code
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407 # attribute of the method. We change it, and then wait for
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408 # __record_outcome to be run, which signals the end of the __run
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409 # method, at which point we restore the previous check_output
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410 # implementation.
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411 if _IS_PYTHON_3:
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412 check_func = frame.f_locals['check'].__func__
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413 checker_check_func = checker.check_output.__func__
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414 else:
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415 check_func = frame.f_locals['check'].im_func
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416 checker_check_func = checker.check_output.im_func
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417 # Because we can't patch up func_globals, this is the only global
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418 # in check_output that we care about:
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419 doctest.etree = etree
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420 _RestoreChecker(dt_self, old_checker, checker,
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421 check_func, checker_check_func,
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422 del_module)
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423
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424 class _RestoreChecker(object):
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425 def __init__(self, dt_self, old_checker, new_checker, check_func, clone_func,
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426 del_module):
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427 self.dt_self = dt_self
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428 self.checker = old_checker
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429 self.checker._temp_call_super_check_output = self.call_super
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430 self.checker._temp_override_self = new_checker
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431 self.check_func = check_func
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432 self.clone_func = clone_func
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433 self.del_module = del_module
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434 self.install_clone()
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435 self.install_dt_self()
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436 def install_clone(self):
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437 if _IS_PYTHON_3:
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438 self.func_code = self.check_func.__code__
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439 self.func_globals = self.check_func.__globals__
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440 self.check_func.__code__ = self.clone_func.__code__
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441 else:
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442 self.func_code = self.check_func.func_code
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443 self.func_globals = self.check_func.func_globals
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444 self.check_func.func_code = self.clone_func.func_code
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445 def uninstall_clone(self):
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446 if _IS_PYTHON_3:
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447 self.check_func.__code__ = self.func_code
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448 else:
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449 self.check_func.func_code = self.func_code
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450 def install_dt_self(self):
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451 self.prev_func = self.dt_self._DocTestRunner__record_outcome
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452 self.dt_self._DocTestRunner__record_outcome = self
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453 def uninstall_dt_self(self):
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454 self.dt_self._DocTestRunner__record_outcome = self.prev_func
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455 def uninstall_module(self):
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456 if self.del_module:
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457 import sys
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458 del sys.modules[self.del_module]
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459 if '.' in self.del_module:
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460 package, module = self.del_module.rsplit('.', 1)
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461 package_mod = sys.modules[package]
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462 delattr(package_mod, module)
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diff changeset
463 def __call__(self, *args, **kw):
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464 self.uninstall_clone()
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465 self.uninstall_dt_self()
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466 del self.checker._temp_override_self
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467 del self.checker._temp_call_super_check_output
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468 result = self.prev_func(*args, **kw)
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469 self.uninstall_module()
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470 return result
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471 def call_super(self, *args, **kw):
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472 self.uninstall_clone()
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diff changeset
473 try:
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474 return self.check_func(*args, **kw)
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475 finally:
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476 self.install_clone()
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477
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478 def _find_doctest_frame():
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479 import sys
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480 frame = sys._getframe(1)
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diff changeset
481 while frame:
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482 l = frame.f_locals
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diff changeset
483 if 'BOOM' in l:
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484 # Sign of doctest
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485 return frame
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486 frame = frame.f_back
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487 raise LookupError(
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488 "Could not find doctest (only use this function *inside* a doctest)")
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489
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490 __test__ = {
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491 'basic': '''
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492 >>> temp_install()
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493 >>> print """<xml a="1" b="2">stuff</xml>"""
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parents:
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494 <xml b="2" a="1">...</xml>
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parents:
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495 >>> print """<xml xmlns="http://example.com"><tag attr="bar" /></xml>"""
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diff changeset
496 <xml xmlns="...">
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diff changeset
497 <tag attr="..." />
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diff changeset
498 </xml>
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parents:
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499 >>> print """<xml>blahblahblah<foo /></xml>""" # doctest: +NOPARSE_MARKUP, +ELLIPSIS
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parents:
diff changeset
500 <xml>...foo /></xml>
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diff changeset
501 '''}
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parents:
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502
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parents:
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503 if __name__ == '__main__':
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parents:
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504 import doctest
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505 doctest.testmod()
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parents:
diff changeset
506
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guerler
parents:
diff changeset
507