def test_CorrectlyHandlesDifferentNumberOfArguments(self):
# Arrange
txt = 'aabbacccadd1234'
parser_a = bpr.LParser('a')
parser_b = bpr.LParser('b')
parser_c = bpr.LParser('c')
parser_d = bpr.LParser('d')
# Act
parser1 = cmb.many1(parser_a)
parser2 = cmb.many1(parser_a, parser_b)
parser3 = cmb.many1(parser_a, parser_b, parser_c)
parser4 = cmb.many1(parser_a, parser_b, parser_c, parser_d)
result1 = parser1(txt)
result2 = parser2(txt)
result3 = parser3(txt)
result4 = parser4(txt)
expected1 = res.Success(('aa', 'bbacccadd1234'))
expected2 = res.Success(('aabba', 'cccadd1234'))
expected3 = res.Success(('aabbaccca', 'dd1234'))
expected4 = res.Success(('aabbacccadd', '1234'))
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
self.assertEqual(result3, expected3)
self.assertEqual(result4, expected4)
def test_AddingLabel(self):
# Arrange
parser1 = bpr.LParser('l')
parser2 = bpr.LParser('o')
parser3 = bpr.LParser('r')
parser = cmb.many1(parser1, parser2, parser3, label='Parser: lor')
parser_default_label = cmb.many1(parser1, parser2, parser3)
# Assert
self.assertEqual(parser.label, 'Parser: lor')
self.assertEqual(parser_default_label.label, '(lor)+')
def test_Failure(self):
# Arrange
txt = 'aabbaccca1234'
parser1 = bpr.LParser('x')
parser2 = bpr.LParser('y')
# Act
parser = cmb.many1(parser1, parser2)
result = parser(txt)
expected = res.Failure('error')
# Assert
self.assertEqual(result, expected)
def test_SuccessCase(self):
# Arrange
txt = 'aabbaccca1234'
parser1 = bpr.LParser('a')
parser2 = bpr.LParser('b')
parser3 = bpr.LParser('c')
# Act
parser = cmb.many1(parser1, parser2, parser3)
result = parser(txt)
expected = res.Success(('aabbaccca', '1234'))
# Assert
self.assertEqual(result, expected)
def test_ParserParseEverything_ReturnsSuccess(self):
# Arrange
txt = 'aabbaccca'
parser_a = bpr.LParser('a')
parser_b = bpr.LParser('b')
parser_c = bpr.LParser('c')
parser_d = bpr.LParser('d')
# Act
parser = cmb.many1(parser_a, parser_b, parser_c, parser_d)
result = parser(txt)
expected = res.Success(('aabbaccca', ''))
# Assert
self.assertEqual(result, expected)
def parse_alphanumerics(label='[A-Za-z0-9]+'):
"""
returns parser parsing at least one letter or digit: [A-Za-z0-9]+
"""
return cmb.many1(*[bp.LParser(char) for char in (string.ascii_letters + string.digits)], label=label)
def parse_letters(label='[A-Za-z]+'):
"""
returns parser parsing at least one latter: [A-Za-z]+
"""
return cmb.many1(*[bp.LParser(char) for char in string.ascii_letters], label=label)
def parse_lowercases(label='[a-z]+'):
"""
returns parser parsing at least one small latter: [a-z]+
"""
return cmb.many1(*[bp.LParser(char) for char in string.ascii_lowercase], label=label)
def parse_uppercases(label='[A-Z]+'):
"""
returns parser parsing at least one capital letter: [A-Z]+
"""
return cmb.many1(*[bp.LParser(char) for char in string.ascii_uppercase], label=label)
def parse_digits(label='[0-9]+'):
"""
returns parser parsing at least one digit: [0-9]+
"""
return cmb.many1(*[bp.LParser(char) for char in string.digits], label=label)
def parse_word(label='[A-Za-z0-9_]+'):
"""
returns parser parsing at least one letter or digit or underscore: [A-Za-z0-9_]+
"""
return cmb.many1(*[bp.LParser(char) for char in (string.ascii_letters + string.digits + '_')], label=label)
def test_WhenNoParserGivenRaisesException(self):
with self.assertRaises(Exception) as context:
cmb.many1()
# Assert
self.assertEqual('Expected parser', str(context.exception))
