def test_star_group_trailing():
_check(
r'a(bb)*a(c|d|e|fg)hij',
'aafghij trailing',
'aafghij',
)
_check(
r'a(bb)*a(c|d|e|fg)hij',
'abbbbafghij trailing',
'abbbbafghij',
)
def test_nested_groups():
match = _check('a((b)(c))', 'abc', 'abc')
assert match.text == {
0: 'abc',
1: 'bc',
2: 'b',
3: 'c',
}
assert match.extents == {
0: (0, 3),
1: (1, 3),
2: (1, 2),
3: (2, 3),
}
_check('a((b)(c))', 'acb', None)
def test_star_simple():
_check(
r'ab*a',
'aba',
'aba',
)
_check(
r'ab*a',
'aa',
'aa',
)
_check(
r'ab*a',
'abba',
'abba',
)
_check(
r'ab*a',
'ada',
None,
)
def test_plus_group_trailing():
_check(
r'a(bb)+a(c|d|e|fg)hij',
'abbbbafghij trailing',
'abbbbafghij',
)
def test_only_prefix_matches_with_group():
_check('a(a|b|c)', 'aab', 'aa')
def test_alternative_in_group():
_check('a(a|b|c)', 'aa', 'aa')
_check('a(a|b|c)', 'ab', 'ab')
_check('a(a|b|c)', 'ac', 'ac')
_check('a(a|b|c)', 'ad', None)
_check('a(a|b|c)', 'a', None)
def test_alternatives():
_check('a|b|c', 'a', 'a')
_check('a|b|c', 'b', 'b')
_check('a|b|c', 'c', 'c')
_check('a|b|c', 'd', None)
def test_simple():
_check(
r'aba',
'aba',
'aba',
)
def test_plus():
_check('a+a', 'aaa', 'aaa')
_check('a+a', 'aaaa', 'aaaa')
_check('a+a', 'aa', 'aa')
_check('a+a', 'a', None)
def test_trailing():
_check(
r'ab',
'aba',
'ab',
)
def test_not_first_substring():
match = _check('a', 'baab', 'a')
assert match.extents == {
0: (1, 2),
}
def test_complex_with_trailing():
_check(
r'ab?c+.(first(second|third)+)',
r'abc.firstsecondthird trailing',
r'abc.firstsecondthird',
)
def test_groups_common_prefix():
_check('a((bc)|(bd))+', 'abc', 'abc')
_check('a((bc)|(bd))+', 'abcbd', 'abcbd')
_check('a((bc)|(bd))+', 'abd', 'abd')
_check('a((bc)|(bd))+', 'abdbc', 'abdbc')
_check('a((bc)|(bd))+', 'acd', None)