def test_get_by_tag_nonexistent(self):
header_matches = IHeaderMatchList(self._mlist)
header_matches.append('header-1', 'pattern-1', tag='tag1')
header_matches.append('header-2', 'pattern-')
header_matches.append('header-3', 'pattern-2', tag='tag1')
match_tag2 = header_matches.get_by_tag('tag2')
self.assertEqual(len(list(match_tag2)), 0)
def test_get_by_tag(self):
# Test that we can get a list of header_matches with a specifc tag.
header_matches = IHeaderMatchList(self._mlist)
header_matches.append('header-1', 'pattern-1', tag='tag1')
header_matches.append('header-2', 'pattern-')
header_matches.append('header-3', 'pattern-2', tag='tag1')
self.assertEqual([(match.header, match.position)
for match in header_matches.get_by_tag('tag1')],
[('header-1', 0), ('header-3', 2)])
