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from __future__ import absolute_import
from __future__ import print_function
import doctest
import xml.etree.ElementTree as ET
import six
from six.moves import map
from six.moves import zip
try:
XMLParseError = ET.ParseError
except AttributeError: # Python < 2.7
from xml.parsers.expat import ExpatError as XMLParseError
RealOutputChecker = doctest.OutputChecker
def debug(*msg):
import sys
print(' '.join(map(str, msg)), file=sys.stderr)
class HTMLOutputChecker(RealOutputChecker):
def check_output(self, want, got, optionflags):
normal = RealOutputChecker.check_output(self, want, got, optionflags)
if normal or not got:
return normal
try:
want_xml = make_xml(want)
except XMLParseError:
pass
else:
try:
got_xml = make_xml(got)
except XMLParseError:
pass
else:
if xml_compare(want_xml, got_xml):
return True
return False
def output_difference(self, example, got, optionflags):
actual = RealOutputChecker.output_difference(
self, example, got, optionflags)
want_xml = got_xml = None
try:
want_xml = make_xml(example.want)
want_norm = make_string(want_xml)
except XMLParseError as e:
if example.want.startswith('<'):
want_norm = '(bad XML: %s)' % e
# '<xml>%s</xml>' % example.want
else:
return actual
try:
got_xml = make_xml(got)
got_norm = make_string(got_xml)
except XMLParseError as e:
if example.want.startswith('<'):
got_norm = '(bad XML: %s)' % e
else:
return actual
s = '%s\nXML Wanted: %s\nXML Got : %s\n' % (
actual, want_norm, got_norm)
if got_xml and want_xml:
result = []
xml_compare(want_xml, got_xml, result.append)
s += 'Difference report:\n%s\n' % '\n'.join(result)
return s
def xml_compare(x1, x2, reporter=None):
if x1.tag != x2.tag:
if reporter:
reporter('Tags do not match: %s and %s' % (x1.tag, x2.tag))
return False
for name, value in six.iteritems(x1.attrib):
if x2.attrib.get(name) != value:
if reporter:
reporter('Attributes do not match: %s=%r, %s=%r'
% (name, value, name, x2.attrib.get(name)))
return False
for name in x2.attrib:
if name not in x1.attrib:
if reporter:
reporter('x2 has an attribute x1 is missing: %s'
% name)
return False
if not text_compare(x1.text, x2.text):
if reporter:
reporter('text: %r != %r' % (x1.text, x2.text))
return False
if not text_compare(x1.tail, x2.tail):
if reporter:
reporter('tail: %r != %r' % (x1.tail, x2.tail))
return False
cl1 = list(x1)
cl2 = list(x2)
if len(cl1) != len(cl2):
if reporter:
reporter('children length differs, %i != %i'
% (len(cl1), len(cl2)))
return False
i = 0
for c1, c2 in zip(cl1, cl2):
i += 1
if not xml_compare(c1, c2, reporter=reporter):
if reporter:
reporter('children %i do not match: %s'
% (i, c1.tag))
return False
return True
def text_compare(t1, t2):
if not t1 and not t2:
return True
if t1 == '*' or t2 == '*':
return True
return (t1 or '').strip() == (t2 or '').strip()
def make_xml(s):
return ET.XML('<xml>%s</xml>' % s)
def make_string(xml):
if isinstance(xml, six.string_types):
xml = make_xml(xml)
s = ET.tostring(xml)
if s == '<xml />':
return ''
assert s.startswith('<xml>') and s.endswith('</xml>'), repr(s)
return s[5:-6]
def install():
doctest.OutputChecker = HTMLOutputChecker
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