2 ##########################################################################
4 # Copyright 2011 Jose Fonseca
7 # Permission is hereby granted, free of charge, to any person obtaining a copy
8 # of this software and associated documentation files (the "Software"), to deal
9 # in the Software without restriction, including without limitation the rights
10 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 # copies of the Software, and to permit persons to whom the Software is
12 # furnished to do so, subject to the following conditions:
14 # The above copyright notice and this permission notice shall be included in
15 # all copies or substantial portions of the Software.
17 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 ##########################################################################/
34 def strip_object_hook(obj):
35 if '__class__' in obj:
37 for name in obj.keys():
38 if name.startswith('__') and name.endswith('__'):
45 def visit(self, node, *args, **kwargs):
46 if isinstance(node, dict):
47 return self.visitObject(node, *args, **kwargs)
48 elif isinstance(node, list):
49 return self.visitArray(node, *args, **kwargs)
51 return self.visitValue(node, *args, **kwargs)
53 def visitObject(self, node, *args, **kwargs):
56 def visitArray(self, node, *args, **kwargs):
59 def visitValue(self, node, *args, **kwargs):
63 class Dumper(Visitor):
65 def __init__(self, stream = sys.stdout):
73 self._write(' '*self.level)
78 def visitObject(self, node):
83 for i in range(len(members)):
86 self.enter_member(name)
88 self.leave_member(i == len(members) - 1)
91 def enter_object(self):
96 def enter_member(self, name):
98 self._write('%s: ' % name)
100 def leave_member(self, last):
105 def leave_object(self):
112 def visitArray(self, node):
114 for i in range(len(node)):
118 if i != len(node) - 1:
123 def enter_array(self):
128 def leave_array(self):
133 def visitValue(self, node):
134 self._write(json.dumps(node))
138 class Comparer(Visitor):
140 def __init__(self, ignore_added = False, tolerance = 2.0 ** -24):
141 self.ignore_added = ignore_added
142 self.tolerance = tolerance
144 def visitObject(self, a, b):
145 if not isinstance(b, dict):
147 if len(a) != len(b) and not self.ignore_added:
153 if ak != bk and not self.ignore_added:
161 if not self.visit(ae, be):
165 def visitArray(self, a, b):
166 if not isinstance(b, list):
170 for ae, be in zip(a, b):
171 if not self.visit(ae, be):
175 def visitValue(self, a, b):
176 if isinstance(a, float) or isinstance(b, float):
178 return abs(b) < self.tolerance
180 return abs((b - a)/a) < self.tolerance
185 class Differ(Visitor):
187 def __init__(self, stream = sys.stdout, ignore_added = False):
188 self.dumper = Dumper(stream)
189 self.comparer = Comparer(ignore_added = ignore_added)
191 def visit(self, a, b):
192 if self.comparer.visit(a, b):
194 Visitor.visit(self, a, b)
196 def visitObject(self, a, b):
197 if not isinstance(b, dict):
200 self.dumper.enter_object()
201 names = set(a.keys())
202 if not self.comparer.ignore_added:
203 names.update(b.keys())
207 for i in range(len(names)):
209 ae = a.get(name, None)
210 be = b.get(name, None)
211 if not self.comparer.visit(ae, be):
212 self.dumper.enter_member(name)
214 self.dumper.leave_member(i == len(names) - 1)
216 self.dumper.leave_object()
218 def visitArray(self, a, b):
219 if not isinstance(b, list):
222 self.dumper.enter_array()
223 max_len = max(len(a), len(b))
224 for i in range(max_len):
233 self.dumper._indent()
234 if self.comparer.visit(ae, be):
235 self.dumper.visit(ae)
239 self.dumper._write(',')
240 self.dumper._newline()
242 self.dumper.leave_array()
244 def visitValue(self, a, b):
248 def replace(self, a, b):
250 self.dumper._write(' -> ')
255 # Unfortunately JSON standard does not include comments, but this is a quite
256 # useful feature to have on regressions tests
260 r'//[^\r\n]*', # comment
261 r'"[^"\\]*(\\.[^"\\]*)*"', # string
264 _tokens_re = re.compile(r'|'.join(['(' + token_re + ')' for token_re in _token_res]), re.DOTALL)
267 def _strip_comment(mo):
274 def _strip_comments(data):
275 '''Strip (non-standard) JSON comments.'''
276 return _tokens_re.sub(_strip_comment, data)
279 assert _strip_comments('''// a comment
280 "// a comment in a string
282 "// a comment in a string
286 def load(stream, strip_images = True, strip_comments = True):
288 object_hook = strip_object_hook
293 data = _strip_comments(data)
294 return json.loads(data, strict=False, object_hook = object_hook)
296 return json.load(stream, strict=False, object_hook = object_hook)
300 optparser = optparse.OptionParser(
301 usage="\n\t%prog [options] <ref_json> <src_json>")
302 optparser.add_option(
304 action="store_false", dest="strip_images", default=True,
305 help="compare images")
307 (options, args) = optparser.parse_args(sys.argv[1:])
310 optparser.error('incorrect number of arguments')
312 a = load(open(sys.argv[1], 'rt'), options.strip_images)
313 b = load(open(sys.argv[2], 'rt'), options.strip_images)
323 if __name__ == '__main__':