def test_line_separators_preserved(source_with_newline, newline):
options = OPTIONS[0]
options = attr.evolve(options, write_back=core.WriteBackMode.INPLACE)
source = source_with_newline(newline)
core.reformat_single_file(source, options=options)
with open(source, "rb") as buf:
_newline = core.decode_bytes(buf.read())[2]
assert _newline == newline
def test_change_line_separators(source_with_newline, old_newline_mode,
new_newline_mode):
options = OPTIONS[0]
options = attr.evolve(options,
write_back=core.WriteBackMode.INPLACE,
newline=old_newline_mode)
source = source_with_newline(core.NEWLINE_FROM_OPTION[old_newline_mode])
core.reformat_single_file(source, options=options)
options = attr.evolve(options,
write_back=core.WriteBackMode.INPLACE,
newline=new_newline_mode)
core.reformat_single_file(source, options=options)
with open(source, "rb") as buf:
_newline = core.decode_bytes(buf.read())[2]
assert _newline == core.NEWLINE_FROM_OPTION[new_newline_mode]