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import html.parser
class Parser(html.parser.HTMLParser):
def __init__(self):
super().__init__()
self._stream = []
def handle_starttag(self, tag, attrs):
attrs = sorted(attrs, key=lambda x: x[0])
attrs = '|'.join([k[0] + ':' + k[1] for k in attrs])
self._stream.append(('<', tag, attrs))
def handle_endtag(self, tag):
self._stream.append(('>', tag, ''))
def handle_data(self, data):
self._stream.append(('_', data, ''))
@property
def stream(self):
return self._stream
def _serialize(t):
parser = Parser()
parser.feed(t)
return parser.stream
def structural_diff(a, b):
"""Check if there is a structural difference between two HTML files."""
a_s = _serialize(a)
b_s = _serialize(b)
for e, f in zip(a_s, b_s):
assert e == f, f'Expected: {e}, found: {f}'
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