def test_AddingLabel(self):
# Arrange
parser1 = bpr.LParser('l')
parser2 = bpr.LParser('o')
parser3 = bpr.LParser('r')
parser = cmb.opt(parser1, parser2, parser3, label='Parser: lor')
parser_default_label = cmb.opt(parser1, parser2, parser3)
# Assert
self.assertEqual(parser.label, 'Parser: lor')
self.assertEqual(parser_default_label.label, '(lor)?')
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_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
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 test_CorrectlyHandlesDifferentNumberOfArguments_Failure(self):
# Arrange
txt1 = '11789'
txt2 = '123789'
parser_1 = bpr.LParser('1')
parser_2 = bpr.LParser('2')
parser_3 = bpr.LParser('3')
parser_4 = bpr.LParser('4')
# Act
parser = cmb.opt(parser_1, parser_2, parser_3, parser_4)
result1 = parser(txt1)
result2 = parser(txt2)
expected1 = res.Failure('error')
expected2 = res.Failure('error')
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
def test_CorrectlyHandlesDifferentNumberOfArguments_Success(self):
# Arrange
txt1 = '1789'
txt2 = '789'
parser_1 = bpr.LParser('1')
parser_2 = bpr.LParser('2')
parser_3 = bpr.LParser('3')
parser_4 = bpr.LParser('4')
# Act
parser = cmb.opt(parser_1, parser_2, parser_3, parser_4)
result1 = parser(txt1)
result2 = parser(txt2)
expected1 = res.Success(('1', '789'))
expected2 = res.Success(('', '789'))
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
def parse_integer(label='INTEGER'):
"""
returns parser for integer
"""
sign = cmb.opt(bp.LParser('-'))
return cmb.and_then(sign, parse_unsignedinteger(), label=label)
