....slices [('disabled', 16, 16)]
all [('double', ''), ('single', ''), ('empty', 'value'), ('missing', ''), ('empty2', '')]
slices [('double', 11, 11), ('single', 21, 21), ('empty', 30, 35), ('missing', 43, 43), ('empty2', 51, 51)]
.
tag = 'a'
1 'a'

tag = 'a'
1 'a'
2 'novalue'
5 ''

tag = 'a'
1 'a'
2 'href'
4 'double quoted'

tag = 'a'
1 'a'
2 'href'
3 'foo'
2 'class'
4 'bar'

tag = 'a'
1 'a'
2 'href'
3 'foo'
2 'class'
4 'bar'
...
----------------------------------------------------------------------
Ran 8 tests in 0.001s

OK
('empty', None, None, 'val')
None
<_sre.SRE_Match object at 0x7f1c04cd4ed0>
<_sre.SRE_Match object at 0x7f1c04cd4ed0>
Negation
<_sre.SRE_Match object at 0x7f1c04cd4ed0>
(LexError 'Extra data at end of tag' ' !></a>')