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bpo-23706: Add newline parameter to pathlib.Path.write_text (GH-22420) (GH-22420)

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* Add _newline_ parameter to `pathlib.Path.write_text()`
* Update documentation of `pathlib.Path.write_text()`
* Add test case for `pathlib.Path.write_text()` calls with _newline_ parameter passed

Automerge-Triggered-By: GH:methane
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Максим 2020-10-21 05:08:19 +03:00 • committed by GitHub
parent 25492a5b59
commit 5f22741340
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4 changed files with 27 additions and 3 deletions
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20
Lib/test/test_pathlib.py
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@ -1510,6 +1510,26 @@ class _BasePathTest(object):
self.assertRaises(TypeError, (p / 'fileA').write_text, b'somebytes')
self.assertEqual((p / 'fileA').read_text(encoding='latin-1'), 'äbcdefg')
def test_write_text_with_newlines(self):
p = self.cls(BASE)
# Check that `\n` character change nothing
(p / 'fileA').write_text('abcde\r\nfghlk\n\rmnopq', newline='\n')
self.assertEqual((p / 'fileA').read_bytes(),
b'abcde\r\nfghlk\n\rmnopq')
# Check that `\r` character replaces `\n`
(p / 'fileA').write_text('abcde\r\nfghlk\n\rmnopq', newline='\r')
self.assertEqual((p / 'fileA').read_bytes(),
b'abcde\r\rfghlk\r\rmnopq')
# Check that `\r\n` character replaces `\n`
(p / 'fileA').write_text('abcde\r\nfghlk\n\rmnopq', newline='\r\n')
self.assertEqual((p / 'fileA').read_bytes(),
b'abcde\r\r\nfghlk\r\n\rmnopq')
# Check that no argument passed will change `\n` to `os.linesep`
os_linesep_byte = bytes(os.linesep, encoding='ascii')
(p / 'fileA').write_text('abcde\nfghlk\n\rmnopq')
self.assertEqual((p / 'fileA').read_bytes(),
b'abcde' + os_linesep_byte + b'fghlk' + os_linesep_byte + b'\rmnopq')
def test_iterdir(self):
P = self.cls
p = P(BASE)