def test_bline(self):
'''
Test a simple example: letters introduce numbers in an indented block.
'''
#basicConfig(level=DEBUG)
number = Token(Digit())
letter = Token(Letter())
# the simplest whitespace grammar i can think of - lines are either
# numbers (which are single, simple statements) or letters (which
# mark the start of a new, indented block).
block = Delayed()
line = Or(BLine(number), BLine(letter) & block) > list
# and a block is simply a collection of lines, as above
block += Block(line[1:])
program = Trace(line[1:])
text = '''1
2
a
3
b
4
5
6
'''
program.config.default_line_aware(block_policy=1)
parser = program.get_parse_string()
result = parser(text)
assert result == [['1'], ['2'],
['a', ['3'], ['b', ['4'], ['5']], ['6']]], result
def test_invert_bug_4(self):
#basicConfig(level=DEBUG)
bad = BLine(Token('[^a]*'))
bad.config.line_aware(block_policy=2).left_memoize()
parser = bad.get_parse_string()
result = parser('123')
assert result == ['123'], result
def test_invert_bug_4(self):
#basicConfig(level=DEBUG)
bad = BLine(Token('[^a]*'))
bad.config.line_aware(block_policy=2).left_memoize()
parser = bad.get_parse_string()
result = parser('123')
assert result == ['123'], result
def test_line(self):
#basicConfig(level=DEBUG)
text = Token('[^\n\r]+')
quoted = Regexp("'[^']'")
line = BLine(text(quoted))
line.config.default_line_aware(block_start=0)
parser = line.get_parse_string()
assert parser("'a'") == ["'a'"]
def test_invert_bug_6(self):
#basicConfig(level=DEBUG)
bad = BLine(Token(str('[^(*SOL)(*EOL)a]*')))
bad.config.default_line_aware(block_policy=2,
parser_factory=make_str_parser)
bad.config.trace(True)
parser = bad.get_parse_string()
result = parser(str('123'))
assert result == [str('123')], result
def test_invert_bug_6(self):
#basicConfig(level=DEBUG)
bad = BLine(Token(str('[^(*SOL)(*EOL)a]*')))
bad.config.default_line_aware(block_policy=2,
parser_factory=make_str_parser)
bad.config.trace(True)
parser = bad.get_parse_string()
result = parser(str('123'))
assert result == [str('123')], result
def test_offset(self):
#basicConfig(level=DEBUG)
text = Token('[^\n\r]+')
line = BLine(text(~Literal('aa') & Regexp('.*')))
line.config.default_line_aware(block_start=0)
parser = line.get_parse_string()
assert parser('aabc') == ['bc']
# what happens with an empty match?
check = ~Literal('aa') & Regexp('.*')
check.config.no_full_first_match()
assert check.parse('aa') == ['']
assert parser('aa') == ['']
def test_bad_config(self):
#basicConfig(level=DEBUG)
text = Token('[^\n\r]+')
quoted = Regexp("'[^']'")
line = BLine(text(quoted))
line.config.default_line_aware()
parser = line.get_parse_string()
try:
parser("'a'")
assert False, 'Expected error'
except OffsideError as error:
assert str(error).startswith('No initial indentation has been set.')