def test_catch_up_with(self):
test_cases = [
('consume part of current line',
['abc'],
lambda parse_source: parse_source.consume(1),
lambda parse_source: parse_source.consume(2)
),
('copy consumes current line/with existing following line',
['abc', 'def'],
lambda parse_source: None,
lambda parse_source: parse_source.consume_current_line()
),
('copy consumes current line/which is the last line',
['abc'],
lambda parse_source: None,
lambda parse_source: parse_source.consume_current_line()
),
('copy consumes num characters that stretches to the following line',
['123', '456'],
lambda parse_source: None,
lambda parse_source: parse_source.consume(5)
),
('copy consumes all remaining characters',
['123', '456'],
lambda parse_source: None,
lambda parse_source: parse_source.consume(7)
),
]
for test_name, original_source_lines, original_setup, copy_modifier in test_cases:
with self.subTest(test_name):
# ARRANGE #
original = ParseSource('\n'.join(original_source_lines))
original_setup(original)
# ACT #
copy = original.copy
copy_modifier(copy)
original.catch_up_with(copy)
# ASSERT #
self.assertEqual(copy.is_at_eof,
original.is_at_eof,
'is_at_eof')
self.assertEqual(copy.remaining_source,
original.remaining_source,
'remaining_source')
self.assertEqual(copy.has_current_line,
original.has_current_line,
'has_current_line')
if original.has_current_line:
self.assertEqual(copy.current_line_number,
original.current_line_number,
'current_line_number')
self.assertEqual(copy.remaining_part_of_current_line,
original.remaining_part_of_current_line,
'remaining_part_of_current_line')
self.assertEqual(copy.column_index,
original.column_index,
'column_index')
self.assertEqual(copy.is_at_eol,
original.is_at_eol,
'is_at_eol')
def parse(self, fs_location_info: FileSystemLocationInfo,
source: ParseSource) -> ParsedInstruction:
first_line = source.current_line
source_copy = source.copy
description = _DescriptionExtractor(source_copy).apply()
self._consume_space_and_comment_lines(source_copy, first_line)
ret_val = parse_and_compute_source(self.instruction_parser,
fs_location_info, source_copy,
description)
source.catch_up_with(source_copy)
return ret_val
def parse(self,
fs_location_info: FileSystemLocationInfo,
source: ParseSource) -> ParsedInstruction:
first_line = source.current_line
source_copy = source.copy
description = _DescriptionExtractor(source_copy).apply()
self._consume_space_and_comment_lines(source_copy, first_line)
ret_val = parse_and_compute_source(self.instruction_parser,
fs_location_info,
source_copy,
description)
source.catch_up_with(source_copy)
return ret_val