def test_AddingLabel(self):
# Arrange
parser = cmb.parse_any(label='Parser: lor')
parser_default_label = cmb.parse_any()
# Assert
self.assertEqual(parser.label, 'Parser: lor')
self.assertEqual(parser_default_label.label, '.?')
def test_CorrectlyHandlesDifferentNumberOfArguments(self):
# Arrange
txt = 'lorem ipsum'
parser_l = bpr.LParser('l')
parser_o = bpr.LParser('o')
parser_r = bpr.LParser('r')
parser_e = bpr.LParser('e')
parser1 = cmb.and_then(parser_l)
parser2 = cmb.and_then(parser_l, parser_o)
parser3 = cmb.and_then(parser_l, parser_o, parser_r)
parser4 = cmb.and_then(parser_l, parser_o, parser_r, parser_e)
# Act
result1 = parser1(txt)
result2 = parser2(txt)
result3 = parser3(txt)
result4 = parser4(txt)
expected1 = res.Success(('l', 'orem ipsum'))
expected2 = res.Success(('lo', 'rem ipsum'))
expected3 = res.Success(('lor', 'em ipsum'))
expected4 = res.Success(('lore', 'm ipsum'))
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
self.assertEqual(result3, expected3)
self.assertEqual(result4, expected4)
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 parse_character(*chars, **kwargs):
"""
returns parser that match one of the strings given
"""
label = kwargs.get('label', None)
if len(chars) == 1 and len(chars[0]) > 1:
return cmb.or_else(*[bp.LParser(char) for char in chars[0]], label=label)
return cmb.or_else(*[bp.LParser(char) for char in chars], label=label)
def test_AddingLabel(self):
# Arrange
parser1 = bpr.LParser('l')
parser2 = bpr.LParser('o')
parser = cmb.rightparser(parser1, parser2, label='Parser: lor')
parser_default_label = cmb.rightparser(parser1, parser2)
# Assert
self.assertEqual(parser.label, 'Parser: lor')
self.assertEqual(parser_default_label.label, 'lo')
def test_AddingLabel(self):
# Arrange
parser1 = bpr.LParser('x')
parser2 = bpr.LParser(',')
parser = cmb.sep_by1(parser1, parser2, label='Parser: lor')
parser_default_label = cmb.sep_by1(parser1, parser2)
# Assert
self.assertEqual(parser.label, 'Parser: lor')
self.assertEqual(parser_default_label.label, 'x[,x]+')
def test_AddingLabel(self):
# Arrange
parser1 = bpr.LParser('l')
parser2 = bpr.LParser('o')
parser3 = bpr.LParser('r')
parser = cmb.and_then(parser1, parser2, parser3, label='Parser: lor')
parser_default_label = cmb.and_then(parser1, parser2, parser3)
# Assert
self.assertEqual(parser.label, 'Parser: lor')
self.assertEqual(parser_default_label.label, 'lor')
def parse_string(string, label=None):
"""
returns parser of a given string
"""
if not isinstance(string, str):
raise Exception('Expected string')
return cmb.and_then(*[bp.LParser(char) for char in string], label=label)
def test_CorrectlyHandlesDifferentNumberOfArguments(self):
# Arrange
txt1 = 'lorem ipsum dolor sit amet'
txt2 = 'ipsum dolor sit amet'
txt3 = 'dolor sit amet'
txt4 = 'sit amet'
parser_l = bpr.LParser('l')
parser_o = bpr.LParser('i')
parser_r = bpr.LParser('d')
parser_e = bpr.LParser('s')
parser = cmb.or_else(parser_l, parser_o, parser_r, parser_e)
# Act
result1 = parser(txt1)
result2 = parser(txt2)
result3 = parser(txt3)
result4 = parser(txt4)
expected1 = res.Success(('l', 'orem ipsum dolor sit amet'))
expected2 = res.Success(('i', 'psum dolor sit amet'))
expected3 = res.Success(('d', 'olor sit amet'))
expected4 = res.Success(('s', 'it amet'))
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
self.assertEqual(result3, expected3)
self.assertEqual(result4, expected4)
def test_FailureCase(self):
# Arrange
txt = ''
parser = cmb.parse_any()
# Act
result = parser(txt)
expected = res.Failure('No more input')
# Assert
self.assertEqual(result, expected)
def test_Failure(self):
# Arrange
txt = '112345'
parser = bpr.LParser('1')
# Act
parser = cmb.opt(parser)
result = parser(txt)
expected = res.Failure('error')
# Assert
self.assertEqual(result, expected)
def test_SuccessCase(self):
# Arrange
txt = 'abc123 lorem ipsum'
parser_l = stp.parse_lowercases()
parser_r = stp.parse_digits()
parser = cmb.rightparser(parser_l, parser_r)
# Act
result = parser(txt)
expected = res.Success(('123', ' lorem ipsum'))
# Assert
self.assertEqual(result, expected)
def parse_unsignedinteger(label='UINTEGER'):
"""
returns parser for unsigned integer
"""
digits_09 = parse_digit('0123456789')
digits_19 = parse_character('123456789')
nonzero = cmb.and_then(digits_19, cmb.many(digits_09))
zero = bp.LParser('0')
def internal(txt):
fst_digit = zero(txt)
if fst_digit.isSuccess:
snd = digits_09(fst_digit.value[1])
if snd.isSuccess:
return res.Failure('error')
else:
return fst_digit
return nonzero(txt)
return bp.LParser(internal, label)
def test_FailureCase(self):
# Arrange
txt = 'Lorem'
parser_1 = bpr.LParser('1')
# Act
parser = cmb.until(parser_1)
result = parser(txt)
expected = res.Failure('No more input')
# Assert
self.assertEqual(result, expected)
def test_NoMatch(self):
# Arrange
txt = 'aabbaccca1234'
parser1 = bpr.LParser('x')
parser2 = bpr.LParser('y')
# Act
parser = cmb.many(parser1, parser2)
result = parser(txt)
expected = res.Success(('', 'aabbaccca1234'))
# Assert
self.assertEqual(result, expected)
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_FailureCase(self):
# Arrange
txt = '123abc lorem ipsum'
parser_l = stp.parse_lowercases()
parser_r = stp.parse_digits()
parser = cmb.rightparser(parser_l, parser_r)
# Act
result = parser(txt)
expected = res.Failure('error')
# Assert
self.assertEqual(result, expected)
def test_FailureCase(self):
# Arrange
txt1 = 'ABC'
sep = bpr.LParser(",")
item = stp.parse_lowercases()
parser = cmb.sep_by(item, sep)
# Act
result1 = parser(txt1)
expected1 = res.Failure('error')
# Assert
self.assertEqual(result1, expected1)
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_WhenFirstLettersAreIncorrect_ReturnFailure(self):
# Arrange
txt = 'lorem ipsum'
parser1 = bpr.LParser('l')
parser2 = bpr.LParser('x')
parser3 = bpr.LParser('r')
parser = cmb.and_then(parser1, parser2, parser3)
# Act
result = parser(txt)
expected = res.Failure('error')
# Assert
self.assertEqual(result, expected)
def test_SuccessCase(self):
# Arrange
txt = 'ABCabc123 lorem ipsum'
parser_l = stp.parse_uppercases()
parser_m = stp.parse_lowercases()
parser_r = stp.parse_digits()
parser = cmb.betweenparsers(parser_l, parser_m, parser_r)
# Act
result = parser(txt)
expected = res.Success(('abc', ' lorem ipsum'))
# Assert
self.assertEqual(result, expected)
def test_WhenFirstLettersAreCorrect_ReturnSuccess(self):
# Arrange
txt = 'lorem ipsum'
parser1 = bpr.LParser('l')
parser2 = bpr.LParser('o')
parser3 = bpr.LParser('r')
parser = cmb.and_then(parser1, parser2, parser3)
# Act
result = parser(txt)
expected = res.Success(('lor', 'em ipsum'))
# Assert
self.assertEqual(result, expected)
def test_CorrectlyHandlesDifferentNumberOfArguments_Failure(self):
# Arrange
txt = 'Lorem'
parser_1 = bpr.LParser('1')
parser_2 = bpr.LParser('2')
parser_3 = bpr.LParser('3')
parser = cmb.until(parser_1, parser_2, parser_3)
# Act
result = parser(txt)
expected = res.Failure.unit('No more input')
# Arrange
self.assertEqual(result, expected)
def test_FailureCase(self):
# Arrange
txt = 'Lorem'
parser1 = bpr.LParser('l')
parser2 = bpr.LParser('x')
parser3 = bpr.LParser('i')
# Act
parser = cmb.or_else(parser1, parser2, parser3)
result = parser(txt)
expected = res.Failure('error')
# Assert
self.assertEqual(result, expected)
def test_FailureCase(self):
# Arrange
txt = 'ABCabc123 lorem ipsum'
parser_l = stp.parse_uppercases()
parser_m = stp.parse_digits()
parser_r = stp.parse_lowercases()
parser = cmb.betweenparsers(parser_l, parser_m, parser_r)
# Act
result = parser(txt)
expected = res.Failure('error')
# 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 lstrip(parser, ignored_lst=None):
"""
Strips ignored characters from left side
"""
if ignored_lst is None:
ignored_lst = [' ', '\t', '\n']
ignored_parser = cmb.many(parse_one_of_strings(*ignored_lst))
def internal(txt):
stripping = ignored_parser(txt)
return parser(stripping.value[1])
return bp.LParser(internal, parser.label)
def test_SuccessCase(self):
# Arrange
txt1 = '2345'
txt2 = '12345'
parser = bpr.LParser('1')
# Act
parser = cmb.opt(parser)
result1 = parser(txt1)
result2 = parser(txt2)
expected1 = res.Success(('', '2345'))
expected2 = res.Success(('1', '2345'))
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
def parse_float(label='FLOAT'):
"""
returns parser for floating point number
"""
sign = cmb.opt(bp.LParser('-'))
coma = bp.LParser('.')
e = cmb.or_else(bp.LParser('e'), bp.LParser('E'))
exponent = cmb.opt(cmb.and_then(e, parse_integer()))
integer = parse_integer()
return cmb.and_then(sign, cmb.opt(integer), coma, parse_digits(), exponent, label=label)
def test_SuccessCase(self):
# Arrange
txt1 = 'Lorem'
txt2 = 'ipsum'
parser1 = bpr.LParser('L')
parser2 = bpr.LParser('x')
parser3 = bpr.LParser('i')
# Act
parser = cmb.or_else(parser1, parser2, parser3)
result1 = parser(txt1)
result2 = parser(txt2)
expected1 = res.Success(('L', 'orem'))
expected2 = res.Success(('i', 'psum'))
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
