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_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
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 internal(txt):
fst_result = parser(txt)
if fst_result.isFailure:
return res.Success(("", txt))
if fst_result.isSuccess:
parsed, remaining = fst_result.value
snd_result = parser(remaining)
if snd_result.isFailure:
return fst_result
return res.Failure('error')
def test_lift_WhenLiftedFunctionCalledOnFailure_FailureIsReturn(self):
# Arrange
def triple(x):
return 3 * x
lifted_f = res.Result.lift(triple)
arg = res.Failure("error")
expected = res.Failure("error")
# Act
result = lifted_f(arg)
# Assert
self.assertEqual(result, expected)
def test_lift_WhenLiftedFunctionRaisesException_FailureIsReturn(self):
# Arrange
def triple(x):
return 3 / x
lifted_f = res.Result.lift(triple)
arg = res.Success(0)
expected = res.Failure("division by zero")
# Act
result = lifted_f(arg)
# Assert
self.assertEqual(result, expected)
def test_lift_WhenLiftedFunctionCalledOnSuccess_SuccessIsReturn(self):
# Arrange
def triple(x):
return 3 * x
lifted_f = res.Result.lift(triple)
arg = res.Success(5)
expected = res.Success(15)
# Act
result = lifted_f(arg)
# 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_liftn_WhenLiftedFunctionCalledOnFailure_FailureIsReturn(self):
# Arrange
def sumThree(x, y, z):
return x + y + z
lifted_f = res.Result.liftn(sumThree)
arg1 = res.Success(1)
arg2 = res.Failure(4)
arg3 = res.Success(3)
# Act
result = lifted_f(arg1, arg2, arg3)
expected = tuple([arg1, arg2, arg3])
# Assert
self.assertEqual(result, expected)
def test_liftn_WhenInproperNumberOfArgumentsGiven_FailureIsReturn(self):
# Arrange
def sumThree(x, y, z):
return x + y + z
lifted_f = res.Result.liftn(sumThree)
arg1 = res.Success(1)
arg2 = res.Success(2)
# Act
result = lifted_f(arg1, arg2)
expected = res.Failure(
r"sumThree() missing 1 required positional argument: 'z'")
# Assert
self.assertEqual(result, expected)
def test_liftn_WhenLiftedFunctionRaisesException_FailureIsReturn(self):
# Arrange
def sumThree(x, y, z):
return x + y / z
lifted_f = res.Result.liftn(sumThree)
arg1 = res.Success(1)
arg2 = res.Success(2)
arg3 = res.Success(0)
# Act
result = lifted_f(arg1, arg2, arg3)
expected = res.Failure("division by zero")
# Assert
self.assertEqual(result, expected)
def test_FailureCase(self):
# Arrange
txt1 = 'ABC'
txt2 = ''
sep = bpr.LParser(",")
item = stp.parse_lowercases()
parser = cmb.sep_by1(item, sep)
# Act
result1 = parser(txt1)
expected1 = res.Failure('error')
result2 = parser(txt2)
expected2 = res.Failure('error')
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
def test_parse_string(self):
# Arrange
txt = 'lorem ipsum'
parser_succ = stp.parse_string('lorem')
parser_fail = stp.parse_string('ipsum', label='FAIL')
# Act
result_succ = parser_succ(txt)
result_fail = parser_fail(txt)
expected_succ = res.Success(('lorem', ' ipsum'))
expected_fail = res.Failure('error')
# Assert
self.assertEqual(result_succ, expected_succ)
self.assertEqual(result_fail, expected_fail)
self.assertEqual(parser_succ.label, 'lorem')
self.assertEqual(parser_fail.label, 'FAIL')
def test_unit(self):
# Arrange
expected = res.Failure("error")
# Act
result = res.Failure.unit("error")
# Assert
self.assertEqual(result, expected)
def test_unit(self):
# Arrange
expected = res.Success(123)
# Act
result = res.Success.unit(123)
# Assert
self.assertEqual(result, expected)
def internal(txt):
result = parser(txt)
if result.isFailure:
return result
_, remaining = ignored_parser(result.value[1]).value
return res.Success((result.value[0], remaining))
def test_SuccessCase(self):
# Arrange
txt1 = 'Lorem1'
txt2 = 'Lorem#ipsum'
parser_1 = bpr.LParser('1')
parser_sharp = bpr.LParser('#')
# Act
parser = cmb.until(parser_1, parser_sharp)
result1 = parser(txt1)
result2 = parser(txt2)
expected1 = res.Success(('Lorem', '1'))
expected2 = res.Success(('Lorem', '#ipsum'))
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
def internal(txt):
if txt == "":
return res.Failure.unit('error')
fst_res = item(txt)
if fst_res.isFailure:
return res.Failure('error')
parsed, remaining = fst_res.value
snd_res = sep(remaining)
if snd_res.isFailure:
return res.Success((parsed, remaining))
result = parser(txt)
if result.isSuccess:
parsed, remaining = result.value
return res.Success.unit((parsed, remaining))
return res.Failure('error')
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)
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_SuccessCase(self):
# Arrange
txt1 = '1'
txt2 = 'a'
txt3 = '$'
parser = cmb.parse_any()
# Act
result1 = parser(txt1)
result2 = parser(txt2)
result3 = parser(txt3)
expected1 = res.Success((txt1, ''))
expected2 = res.Success((txt2, ''))
expected3 = res.Success((txt3, ''))
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
self.assertEqual(result3, expected3)
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 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)
def test_WhenFirstLetterIsIncorrect_ReturnsFailure(self):
# Arrange
txt = 'Lorem Ipsum'
parser = bp.LParser('X')
# Act
result = parser(txt)
expected = res.Failure('error')
# Assert
self.assertEqual(result, expected)
def test_WhenFirstLetterIsCorrect_ReturnsSuccess(self):
# Arrange
txt = 'Lorem ipsum'
parser = bp.LParser('L')
# Act
result = parser(txt)
expected = res.Success(('L', 'orem ipsum'))
# Assert
self.assertEqual(result, expected)
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 internal(txt):
res1 = parsers[0](txt)
if res1.isSuccess:
return res1
res2 = parsers[1](txt)
if res2.isSuccess:
return res2
return res.Failure('error')
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 = 'abc,def,ghi'
txt2 = 'abc'
txt3 = 'abc,def,ghi2132'
sep = bpr.LParser(",")
item = stp.parse_lowercases()
parser = cmb.sep_by1(item, sep)
# Act
result1 = parser(txt1)
expected1 = res.Success(('abc,def,ghi', ''))
result2 = parser(txt2)
expected2 = res.Success(('abc', ''))
result3 = parser(txt3)
expected3 = res.Success(('abc,def,ghi', '2132'))
# Assert
self.assertEqual(result1, expected1)
self.assertEqual(result2, expected2)
self.assertEqual(result3, expected3)
def test_parse_character(self):
# Arrange
txt1 = 'aaa'
txt2 = 'bbb'
txt3 = 'ccc'
parser = stp.parse_character('a', 'b')
parser_label = stp.parse_character('ab', label='spam')
# Act
result_succ1 = parser(txt1)
result_succ2 = parser_label(txt2)
result_fail = parser(txt3)
expected_succ1 = res.Success(('a', 'aa'))
expected_succ2 = res.Success(('b', 'bb'))
expected_fail = res.Failure('error')
# Assert
self.assertEqual(result_succ1, expected_succ1)
self.assertEqual(result_succ2, expected_succ2)
self.assertEqual(result_fail, expected_fail)
self.assertEqual(parser.label, '[ab]')
self.assertEqual(parser_label.label, 'spam')