Package lxml :: Package tests :: Module selftest2 |
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# Source Code for Module lxml.tests.selftest2

      1  # $Id: selftest.py 2213 2005-01-11 18:49:47Z fredrik $
      2  # elementtree selftest program
      3
      4  # this test script uses Python's "doctest" module to check that the
      5  # *test script* works as expected.
      6
      7  import sys
      8
      9  try:
     10      from StringIO import StringIO
     11      BytesIO = StringIO
     12  except ImportError:
     13      from io import BytesIO, StringIO
     14
     15  from lxml import etree as ElementTree
     16
     17 -def stdout():
     18      if sys.version_info[0] < 3:
     19          return sys.stdout
     20      class bytes_stdout(object):
     21          def write(self, data):
     22              if isinstance(data, bytes):
     23                  data = data.decode('ISO8859-1')
     24              sys.stdout.write(data)
     25      return bytes_stdout()
     26
     27 -def unserialize(text):
     28      file = StringIO(text)
     29      tree = ElementTree.parse(file)
     30      return tree.getroot()
     31
     32 -def serialize(elem, encoding=None):
     33      file = BytesIO()
     34      tree = ElementTree.ElementTree(elem)
     35      if encoding:
     36          tree.write(file, encoding=encoding)
     37      else:
     38          tree.write(file)
     39      result = file.getvalue()
     40      if sys.version_info[0] >= 3:
     41          result = result.decode('ISO8859-1')
     42      result = result.replace(' />', '/>')
     43      if result[-1:] == '\n':
     44          result = result[:-1]
     45      return result
     46
     47 -def summarize(elem):
     48      return elem.tag
     49
     50 -def summarize_list(seq):
     51      return list(map(summarize, seq))
     52
     53  SAMPLE_XML = unserialize("""
     54  <body>
     55    <tag>text</tag>
     56    <tag />
     57    <section>
     58      <tag>subtext</tag>
     59    </section>
     60  </body>
     61  """)
     62
     63  SAMPLE_XML_NS = unserialize("""
     64  <body xmlns="http://effbot.org/ns">
     65    <tag>text</tag>
     66    <tag />
     67    <section>
     68      <tag>subtext</tag>
     69    </section>
     70  </body>
     71  """)
     72
     73  # interface tests
     74
     75 -def check_string(string):
     76      len(string)
     77      for char in string:
     78          if len(char) != 1:
     79              print("expected one-character string, got %r" % char)
     80      new_string = string + ""
     81      new_string = string + " "
     82      string[:0]
     83
     84 -def check_mapping(mapping):
     85      len(mapping)
     86      keys = mapping.keys()
     87      items = mapping.items()
     88      for key in keys:
     89          item = mapping[key]
     90      mapping["key"] = "value"
     91      if mapping["key"] != "value":
     92          print("expected value string, got %r" % mapping["key"])
     93
     94 -def check_element(element):
     95      if not hasattr(element, "tag"):
     96          print("no tag member")
     97      if not hasattr(element, "attrib"):
     98          print("no attrib member")
     99      if not hasattr(element, "text"):
    100          print("no text member")
    101      if not hasattr(element, "tail"):
    102          print("no tail member")
    103      check_string(element.tag)
    104      check_mapping(element.attrib)
    105      if element.text != None:
    106          check_string(element.text)
    107      if element.tail != None:
    108          check_string(element.tail)
    109
    110 -def check_element_tree(tree):
    111      check_element(tree.getroot())
    112
    113 -def element():
    114      """
    115      Test element tree interface.
    116
    117      >>> element = ElementTree.Element("tag")
    118      >>> check_element(element)
    119      >>> tree = ElementTree.ElementTree(element)
    120      >>> check_element_tree(tree)
    121      """
    122
    123 -def parsefile():
    124      """
    125      Test parsing from file.  Note that we're opening the files in
    126      here; by default, the 'parse' function opens the file in binary
    127      mode, and doctest doesn't filter out carriage returns.
    128
    129      >>> file = open("samples/simple.xml", "rb")
    130      >>> tree = ElementTree.parse(file)
    131      >>> file.close()
    132      >>> tree.write(stdout())
    133      <root>
    134         <element key="value">text</element>
    135         <element>text</element>tail
    136         <empty-element/>
    137      </root>
    138      >>> file = open("samples/simple-ns.xml", "rb")
    139      >>> tree = ElementTree.parse(file)
    140      >>> file.close()
    141      >>> tree.write(stdout())
    142      <root xmlns="http://namespace/">
    143         <element key="value">text</element>
    144         <element>text</element>tail
    145         <empty-element/>
    146      </root>
    147      """
    148
    149 -def writefile():
    150      """
    151      >>> elem = ElementTree.Element("tag")
    152      >>> elem.text = "text"
    153      >>> serialize(elem)
    154      '<tag>text</tag>'
    155      >>> ElementTree.SubElement(elem, "subtag").text = "subtext"
    156      >>> serialize(elem)
    157      '<tag>text<subtag>subtext</subtag></tag>'
    158      """
    159
    160 -def encoding():
    161      r"""
    162      Test encoding issues.
    163
    164      >>> elem = ElementTree.Element("tag")
    165      >>> elem.text = u'abc'
    166      >>> serialize(elem)
    167      '<tag>abc</tag>'
    168      >>> serialize(elem, "utf-8")
    169      '<tag>abc</tag>'
    170      >>> serialize(elem, "us-ascii")
    171      '<tag>abc</tag>'
    172      >>> serialize(elem, "iso-8859-1").lower()
    173      "<?xml version='1.0' encoding='iso-8859-1'?>\n<tag>abc</tag>"
    174
    175      >>> elem.text = "<&\"\'>"
    176      >>> serialize(elem)
    177      '<tag>&lt;&amp;"\'&gt;</tag>'
    178      >>> serialize(elem, "utf-8")
    179      '<tag>&lt;&amp;"\'&gt;</tag>'
    180      >>> serialize(elem, "us-ascii") # cdata characters
    181      '<tag>&lt;&amp;"\'&gt;</tag>'
    182      >>> serialize(elem, "iso-8859-1").lower()
    183      '<?xml version=\'1.0\' encoding=\'iso-8859-1\'?>\n<tag>&lt;&amp;"\'&gt;</tag>'
    184
    185      >>> elem.attrib["key"] = "<&\"\'>"
    186      >>> elem.text = None
    187      >>> serialize(elem)
    188      '<tag key="&lt;&amp;&quot;\'&gt;"/>'
    189      >>> serialize(elem, "utf-8")
    190      '<tag key="&lt;&amp;&quot;\'&gt;"/>'
    191      >>> serialize(elem, "us-ascii")
    192      '<tag key="&lt;&amp;&quot;\'&gt;"/>'
    193      >>> serialize(elem, "iso-8859-1").lower()
    194      '<?xml version=\'1.0\' encoding=\'iso-8859-1\'?>\n<tag key="&lt;&amp;&quot;\'&gt;"/>'
    195
    196      >>> elem.text = u'\xe5\xf6\xf6<>'
    197      >>> elem.attrib.clear()
    198      >>> serialize(elem)
    199      '<tag>&#229;&#246;&#246;&lt;&gt;</tag>'
    200      >>> serialize(elem, "utf-8")
    201      '<tag>\xc3\xa5\xc3\xb6\xc3\xb6&lt;&gt;</tag>'
    202      >>> serialize(elem, "us-ascii")
    203      '<tag>&#229;&#246;&#246;&lt;&gt;</tag>'
    204      >>> serialize(elem, "iso-8859-1").lower()
    205      "<?xml version='1.0' encoding='iso-8859-1'?>\n<tag>\xe5\xf6\xf6&lt;&gt;</tag>"
    206
    207      >>> elem.attrib["key"] = u'\xe5\xf6\xf6<>'
    208      >>> elem.text = None
    209      >>> serialize(elem)
    210      '<tag key="&#229;&#246;&#246;&lt;&gt;"/>'
    211      >>> serialize(elem, "utf-8")
    212      '<tag key="\xc3\xa5\xc3\xb6\xc3\xb6&lt;&gt;"/>'
    213      >>> serialize(elem, "us-ascii")
    214      '<tag key="&#229;&#246;&#246;&lt;&gt;"/>'
    215      >>> serialize(elem, "iso-8859-1").lower()
    216      '<?xml version=\'1.0\' encoding=\'iso-8859-1\'?>\n<tag key="\xe5\xf6\xf6&lt;&gt;"/>'
    217
    218      """
    219
    220  if sys.version_info[0] >= 3:
    221      encoding.__doc__ = encoding.__doc__.replace("u'", "'")
    222
    223 -def qname():
    224      """
    225      Test QName handling.
    226
    227      1) decorated tags
    228
    229      >>> elem = ElementTree.Element("{uri}tag")
    230      >>> serialize(elem) # 1.1
    231      '<ns0:tag xmlns:ns0="uri"/>'
    232
    233  ##     2) decorated attributes
    234
    235  ##     >>> elem.attrib["{uri}key"] = "value"
    236  ##     >>> serialize(elem) # 2.1
    237  ##     '<ns0:tag ns0:key="value" xmlns:ns0="uri"/>'
    238
    239      """
    240
    241 -def cdata():
    242      """
    243      Test CDATA handling (etc).
    244
    245      >>> serialize(unserialize("<tag>hello</tag>"))
    246      '<tag>hello</tag>'
    247      >>> serialize(unserialize("<tag>&#104;&#101;&#108;&#108;&#111;</tag>"))
    248      '<tag>hello</tag>'
    249      >>> serialize(unserialize("<tag><![CDATA[hello]]></tag>"))
    250      '<tag>hello</tag>'
    251
    252      """
    253
    254 -def find():
    255      """
    256      Test find methods (including xpath syntax).
    257
    258      >>> elem = SAMPLE_XML
    259      >>> elem.find("tag").tag
    260      'tag'
    261      >>> ElementTree.ElementTree(elem).find("tag").tag
    262      'tag'
    263      >>> elem.find("section/tag").tag
    264      'tag'
    265      >>> ElementTree.ElementTree(elem).find("section/tag").tag
    266      'tag'
    267      >>> elem.findtext("tag")
    268      'text'
    269      >>> elem.findtext("tog", "default")
    270      'default'
    271      >>> ElementTree.ElementTree(elem).findtext("tag")
    272      'text'
    273      >>> elem.findtext("section/tag")
    274      'subtext'
    275      >>> ElementTree.ElementTree(elem).findtext("section/tag")
    276      'subtext'
    277      >>> summarize_list(elem.findall("tag"))
    278      ['tag', 'tag']
    279      >>> summarize_list(elem.findall("*"))
    280      ['tag', 'tag', 'section']
    281      >>> summarize_list(elem.findall(".//tag"))
    282      ['tag', 'tag', 'tag']
    283      >>> summarize_list(elem.findall("section/tag"))
    284      ['tag']
    285      >>> summarize_list(elem.findall("section//tag"))
    286      ['tag']
    287      >>> summarize_list(elem.findall("section/*"))
    288      ['tag']
    289      >>> summarize_list(elem.findall("section//*"))
    290      ['tag']
    291      >>> summarize_list(elem.findall("section/.//*"))
    292      ['tag']
    293      >>> summarize_list(elem.findall("*/*"))
    294      ['tag']
    295      >>> summarize_list(elem.findall("*//*"))
    296      ['tag']
    297      >>> summarize_list(elem.findall("*/tag"))
    298      ['tag']
    299      >>> summarize_list(elem.findall("*/./tag"))
    300      ['tag']
    301      >>> summarize_list(elem.findall("./tag"))
    302      ['tag', 'tag']
    303      >>> summarize_list(elem.findall(".//tag"))
    304      ['tag', 'tag', 'tag']
    305      >>> summarize_list(elem.findall("././tag"))
    306      ['tag', 'tag']
    307      >>> summarize_list(ElementTree.ElementTree(elem).findall("/tag"))
    308      ['tag', 'tag']
    309      >>> summarize_list(ElementTree.ElementTree(elem).findall("./tag"))
    310      ['tag', 'tag']
    311      >>> elem = SAMPLE_XML_NS
    312      >>> summarize_list(elem.findall("tag"))
    313      []
    314      >>> summarize_list(elem.findall("{http://effbot.org/ns}tag"))
    315      ['{http://effbot.org/ns}tag', '{http://effbot.org/ns}tag']
    316      >>> summarize_list(elem.findall(".//{http://effbot.org/ns}tag"))
    317      ['{http://effbot.org/ns}tag', '{http://effbot.org/ns}tag', '{http://effbot.org/ns}tag']
    318      """
    319
    320  # XXX only deep copying is supported
    321
    322 -def copy():
    323      """
    324      Test copy handling (etc).
    325
    326      >>> import copy
    327      >>> e1 = unserialize("<tag>hello<foo/></tag>")
    328      >>> # e2 = copy.copy(e1)
    329      >>> e3 = copy.deepcopy(e1)
    330      >>> e1.find("foo").tag = "bar"
    331
    332      >>> serialize(e1).replace(' ', '')
    333      '<tag>hello<bar/></tag>'
    334
    335  ##     >>> serialize(e2).replace(' ', '')
    336  ##     '<tag>hello<bar/></tag>'
    337
    338      >>> serialize(e3).replace(' ', '')
    339      '<tag>hello<foo/></tag>'
    340
    341      """
    342
    343 -def attrib():
    344      """
    345      Test attribute handling.
    346
    347      >>> elem = ElementTree.Element("tag")
    348      >>> elem.get("key") # 1.1
    349      >>> elem.get("key", "default") # 1.2
    350      'default'
    351      >>> elem.set("key", "value")
    352      >>> elem.get("key") # 1.3
    353      'value'
    354
    355      >>> elem = ElementTree.Element("tag", key="value")
    356      >>> elem.get("key") # 2.1
    357      'value'
    358      >>> elem.attrib # 2.2
    359      {'key': 'value'}
    360
    361      >>> elem = ElementTree.Element("tag", {"key": "value"})
    362      >>> elem.get("key") # 3.1
    363      'value'
    364      >>> elem.attrib # 3.2
    365      {'key': 'value'}
    366
    367      >>> elem = ElementTree.Element("tag", {"key": "other"}, key="value")
    368      >>> elem.get("key") # 4.1
    369      'value'
    370      >>> elem.attrib # 4.2
    371      {'key': 'value'}
    372
    373      """
    374
    375 -def makeelement():
    376      """
    377      Test makeelement handling.
    378
    379      >>> elem = ElementTree.Element("tag")
    380      >>> subelem = elem.makeelement("subtag", {"key": "value"})
    381      >>> elem.append(subelem)
    382      >>> serialize(elem)
    383      '<tag><subtag key="value"/></tag>'
    384
    385      >>> elem.clear()
    386      >>> serialize(elem)
    387      '<tag/>'
    388      >>> elem.append(subelem)
    389      >>> serialize(elem)
    390      '<tag><subtag key="value"/></tag>'
    391
    392      """
    393
    394  ## def observer():
    395  ##     """
    396  ##     Test observers.
    397
    398  ##     >>> def observer(action, elem):
    399  ##     ...     print("%s %s" % (action, elem.tag))
    400  ##     >>> builder = ElementTree.TreeBuilder()
    401  ##     >>> builder.addobserver(observer)
    402  ##     >>> parser = ElementTree.XMLParser(builder)
    403  ##     >>> file = open("samples/simple.xml", "rb")
    404  ##     >>> parser.feed(file.read())
    405  ##     start root
    406  ##     start element
    407  ##     end element
    408  ##     start element
    409  ##     end element
    410  ##     start empty-element
    411  ##     end empty-element
    412  ##     end root
    413  ##     >>> file.close()
    414
    415  ##     """
    416
    417  ENTITY_XML = """\
    418  <!DOCTYPE points [
    419  <!ENTITY % user-entities SYSTEM 'user-entities.xml'>
    420  %user-entities;
    421  ]>
    422  <document>&entity;</document>
    423  """
    424
    425  ## def entity():
    426  ##     """
    427  ##     Test entity handling.
    428
    429  ##     1) bad entities
    430
    431  ##     >>> ElementTree.XML("<document>&entity;</document>")
    432  ##     Traceback (most recent call last):
    433  ##     SyntaxError: undefined entity: line 1, column 10
    434
    435  ##     2) custom entity
    436
    437  ##     >>> parser = ElementTree.XMLParser()
    438  ##     >>> parser.entity["entity"] = "text"
    439  ##     >>> parser.feed(ENTITY_XML)
    440  ##     >>> root = parser.close()
    441  ##     >>> serialize(root)
    442  ##     '<document>text</document>'
    443
    444  ##     """
    445
    446  if __name__ == "__main__":
    447      import doctest, selftest2
    448      failed, tested = doctest.testmod(selftest2)
    449      print("%d tests ok." % (tested - failed))
    450      if failed > 0:
    451          print("%d tests failed. Exiting with non-zero return code." % failed)
    452          sys.exit(1)
    453