def test_parse_braces_fail():
for expression in [
'{', '}', '{}', '{5', '{1}', 'A{-7}', 'A{', 'A{1', 'N{7', 'AN{7',
'A{4{}', 'A{4}{3}', 'A{b}', 'A{6X}', 'A{X6}'
]:
with raises(ValueError):
parse_braces(expression)
def test_parse_braces():
assert parse_braces('') == ''
assert parse_braces('A') == 'A'
assert parse_braces('A{0}') == ''
assert parse_braces('A{1}') == 'A'
assert parse_braces('A{2}') == 'AA'
assert parse_braces('A{2}C') == 'AAC'
assert parse_braces('ACGTN{3}TGACCC') == 'ACGTNNNTGACCC'
assert parse_braces('ACGTN{10}TGACCC') == 'ACGTNNNNNNNNNNTGACCC'
assert parse_braces('ACGTN{3}TGA{4}CCC') == 'ACGTNNNTGAAAACCC'
assert parse_braces('ACGTN{0}TGA{4}CCC') == 'ACGTTGAAAACCC'
def test_parse_braces_fail():
for expression in ['{', '}', '{}', '{5', '{1}', 'A{-7}', 'A{', 'A{1', 'N{7', 'AN{7', 'A{4{}',
'A{4}{3}', 'A{b}', 'A{6X}', 'A{X6}']:
with raises(ValueError):
parse_braces(expression)
