Source Code for Module lxml.tests.common_imports

  1  import os 
  2  import os.path 
  3  import re 
  4  import gc 
  5  import sys 
  6  import unittest 
  7   
  8  try: 
  9      import urlparse 
 10  except ImportError: 
 11      import urllib.parse as urlparse  
 12   
 13  try: 
 14      from urllib import pathname2url 
 15  except: 
 16      from urllib.request import pathname2url 
 17   
 18  from lxml import etree, html 
 19   
 20 -def make_version_tuple(version_string): 
 21      l = [] 
 22      for part in re.findall('([0-9]+|[^0-9.]+)', version_string): 
 23          try: 
 24              l.append(int(part)) 
 25          except ValueError: 
 26              l.append(part) 
 27      return tuple(l) 
 28   
 29  IS_PYPY = (getattr(sys, 'implementation', None) == 'pypy' or 
 30             getattr(sys, 'pypy_version_info', None) is not None) 
 31   
 32  IS_PYTHON3 = sys.version_info[0] >= 3 
 33   
 34  try: 
 35      from xml.etree import ElementTree # Python 2.5+ 
 36  except ImportError: 
 37      try: 
 38          from elementtree import ElementTree # standard ET 
 39      except ImportError: 
 40          ElementTree = None 
 41   
 42  if hasattr(ElementTree, 'VERSION'): 
 43      ET_VERSION = make_version_tuple(ElementTree.VERSION) 
 44  else: 
 45      ET_VERSION = (0,0,0) 
 46   
 47  try: 
 48      from xml.etree import cElementTree # Python 2.5+ 
 49  except ImportError: 
 50      try: 
 51          import cElementTree # standard ET 
 52      except ImportError: 
 53          cElementTree = None 
 54   
 55  if hasattr(cElementTree, 'VERSION'): 
 56      CET_VERSION = make_version_tuple(cElementTree.VERSION) 
 57  else: 
 58      CET_VERSION = (0,0,0) 
 59   
 60 -def filter_by_version(test_class, version_dict, current_version): 
 61      """Remove test methods that do not work with the current lib version. 
 62      """ 
 63      find_required_version = version_dict.get 
 64      def dummy_test_method(self): 
 65          pass 
 66      for name in dir(test_class): 
 67          expected_version = find_required_version(name, (0,0,0)) 
 68          if expected_version > current_version: 
 69              setattr(test_class, name, dummy_test_method) 
 70   
 71  try: 
 72      import doctest 
 73      # check if the system version has everything we need 
 74      doctest.DocFileSuite 
 75      doctest.DocTestParser 
 76      doctest.NORMALIZE_WHITESPACE 
 77      doctest.ELLIPSIS 
 78  except (ImportError, AttributeError): 
 79      # we need our own version to make it work (Python 2.3?) 
 80      import local_doctest as doctest 
 81   
 82  try: 
 83      sorted 
 84  except NameError: 
 85 -    def sorted(seq, **kwargs): 
 86          seq = list(seq) 
 87          seq.sort(**kwargs) 
 88          return seq 
 89  else: 
 90      locals()['sorted'] = sorted 
 91   
 92   
 93  try: 
 94      next 
 95  except NameError: 
 96 -    def next(it): 
 97          return it.next() 
 98  else: 
 99      locals()['next'] = next 
100   
101   
102  try: 
103      import pytest 
104  except ImportError: 
105 -    class skipif(object): 
106          "Using a class because a function would bind into a method when used in classes" 
107 -        def __init__(self, *args): pass 
108 -        def __call__(self, func, *args): return func 
109  else: 
110      skipif = pytest.mark.skipif 
111   
112 -def _get_caller_relative_path(filename, frame_depth=2): 
113      module = sys.modules[sys._getframe(frame_depth).f_globals['__name__']] 
114      return os.path.normpath(os.path.join( 
115              os.path.dirname(getattr(module, '__file__', '')), filename)) 
116   
117  from io import StringIO 
118   
119  if sys.version_info[0] >= 3: 
120      # Python 3 
121      from builtins import str as unicode 
122      _chr = chr 
123 -    def _str(s, encoding="UTF-8"): 
124          return s 
125 -    def _bytes(s, encoding="UTF-8"): 
126          return s.encode(encoding) 
127      from io import BytesIO as _BytesIO 
128 -    def BytesIO(*args): 
129          if args and isinstance(args[0], str): 
130              args = (args[0].encode("UTF-8"),) 
131          return _BytesIO(*args) 
132   
133      doctest_parser = doctest.DocTestParser() 
134      _fix_unicode = re.compile(r'(\s+)u(["\'])').sub 
135      _fix_exceptions = re.compile(r'(.*except [^(]*),\s*(.*:)').sub 
136 -    def make_doctest(filename): 
137          filename = _get_caller_relative_path(filename) 
138          doctests = read_file(filename) 
139          doctests = _fix_unicode(r'\1\2', doctests) 
140          doctests = _fix_exceptions(r'\1 as \2', doctests) 
141          return doctest.DocTestCase( 
142              doctest_parser.get_doctest( 
143                  doctests, {}, os.path.basename(filename), filename, 0)) 
144  else: 
145      # Python 2 
146      unichr_escape = re.compile(r'\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}') 
147   
148      from __builtin__ import unicode 
149      _chr = unichr 
150 -    def _str(s, encoding="UTF-8"): 
151          s = unicode(s, encoding=encoding) 
152          return unichr_escape.sub(lambda x: 
153                                       x.group(0).decode('unicode-escape'), 
154                                   s) 
155 -    def _bytes(s, encoding="UTF-8"): 
156          return s 
157      from io import BytesIO 
158   
159      doctest_parser = doctest.DocTestParser() 
160      _fix_traceback = re.compile(r'^(\s*)(?:\w+\.)+(\w*(?:Error|Exception|Invalid):)', re.M).sub 
161      _fix_exceptions = re.compile(r'(.*except [^(]*)\s+as\s+(.*:)').sub 
162      _fix_bytes = re.compile(r'(\s+)b(["\'])').sub 
163 -    def make_doctest(filename): 
164          filename = _get_caller_relative_path(filename) 
165          doctests = read_file(filename) 
166          doctests = _fix_traceback(r'\1\2', doctests) 
167          doctests = _fix_exceptions(r'\1, \2', doctests) 
168          doctests = _fix_bytes(r'\1\2', doctests) 
169          return doctest.DocTestCase( 
170              doctest_parser.get_doctest( 
171                  doctests, {}, os.path.basename(filename), filename, 0)) 
172   
173  try: 
174      skipIf = unittest.skipIf 
175  except AttributeError: 
176 -    def skipIf(condition, why, 
177                 _skip=lambda test_method: None, 
178                 _keep=lambda test_method: test_method): 
179          if condition: 
180              return _skip 
181          return _keep 
182   
183   
184 -class HelperTestCase(unittest.TestCase): 
185 -    def tearDown(self): 
186          gc.collect() 
187   
188 -    def parse(self, text, parser=None): 
189          f = BytesIO(text) if isinstance(text, bytes) else StringIO(text) 
190          return etree.parse(f, parser=parser) 
191       
192 -    def _rootstring(self, tree): 
193          return etree.tostring(tree.getroot()).replace( 
194              _bytes(' '), _bytes('')).replace(_bytes('\n'), _bytes('')) 
195   
196      # assertFalse doesn't exist in Python 2.3 
197      try: 
198          unittest.TestCase.assertFalse 
199      except AttributeError: 
200          assertFalse = unittest.TestCase.failIf 
201   
202   
203 -class SillyFileLike: 
204 -    def __init__(self, xml_data=_bytes('<foo><bar/></foo>')): 
205          self.xml_data = xml_data 
206           
207 -    def read(self, amount=None): 
208          if self.xml_data: 
209              if amount: 
210                  data = self.xml_data[:amount] 
211                  self.xml_data = self.xml_data[amount:] 
212              else: 
213                  data = self.xml_data 
214                  self.xml_data = _bytes('') 
215              return data 
216          return _bytes('') 
217   
218 -class LargeFileLike: 
219 -    def __init__(self, charlen=100, depth=4, children=5): 
220          self.data = BytesIO() 
221          self.chars  = _bytes('a') * charlen 
222          self.children = range(children) 
223          self.more = self.iterelements(depth) 
224   
225 -    def iterelements(self, depth): 
226          yield _bytes('<root>') 
227          depth -= 1 
228          if depth > 0: 
229              for child in self.children: 
230                  for element in self.iterelements(depth): 
231                      yield element 
232                  yield self.chars 
233          else: 
234              yield self.chars 
235          yield _bytes('</root>') 
236   
237 -    def read(self, amount=None): 
238          data = self.data 
239          append = data.write 
240          if amount: 
241              for element in self.more: 
242                  append(element) 
243                  if data.tell() >= amount: 
244                      break 
245          else: 
246              for element in self.more: 
247                  append(element) 
248          result = data.getvalue() 
249          data.seek(0) 
250          data.truncate() 
251          if amount: 
252              append(result[amount:]) 
253              result = result[:amount] 
254          return result 
255   
256 -class LargeFileLikeUnicode(LargeFileLike): 
257 -    def __init__(self, charlen=100, depth=4, children=5): 
258          LargeFileLike.__init__(self, charlen, depth, children) 
259          self.data = StringIO() 
260          self.chars  = _str('a') * charlen 
261          self.more = self.iterelements(depth) 
262   
263 -    def iterelements(self, depth): 
264          yield _str('<root>') 
265          depth -= 1 
266          if depth > 0: 
267              for child in self.children: 
268                  for element in self.iterelements(depth): 
269                      yield element 
270                  yield self.chars 
271          else: 
272              yield self.chars 
273          yield _str('</root>') 
274   
275 -def fileInTestDir(name): 
276      _testdir = os.path.dirname(__file__) 
277      return os.path.join(_testdir, name) 
278   
279 -def path2url(path): 
280      return urlparse.urljoin( 
281          'file:', pathname2url(path)) 
282   
283 -def fileUrlInTestDir(name): 
284      return path2url(fileInTestDir(name)) 
285   
286 -def read_file(name, mode='r'): 
287      f = open(name, mode) 
288      try: 
289          data = f.read() 
290      finally: 
291          f.close() 
292      return data 
293   
294 -def write_to_file(name, data, mode='w'): 
295      f = open(name, mode) 
296      try: 
297          data = f.write(data) 
298      finally: 
299          f.close() 
300   
301 -def readFileInTestDir(name, mode='r'): 
302      return read_file(fileInTestDir(name), mode) 
303   
304 -def canonicalize(xml): 
305      tree = etree.parse(BytesIO(xml) if isinstance(xml, bytes) else StringIO(xml)) 
306      f = BytesIO() 
307      tree.write_c14n(f) 
308      return f.getvalue() 
309   
310 -def unentitify(xml): 
311      for entity_name, value in re.findall("(&#([0-9]+);)", xml): 
312          xml = xml.replace(entity_name, unichr(int(value))) 
313      return xml 
314