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[3.13] gh-71679: Improve tests for repr() of bytes and bytearray (GH-138180) (GH-138183)

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* Merge existing tests test_repr_str and test_to_str.
* Add more tests for non-printable and non-ASCII bytes.
* Add tests for special escape sequences ('\t\n\r').
* Add tests for slashes.
* Add more tests for quotes.
* Add tests for subclasses.
* Add test for non-ASCII class name.
* Only apply @check_bytes_warnings for str() tests.
(cherry picked from commit 0dbbf61cc2)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Miss Islington (bot) 2025-08-27 12:46:33 +02:00 • committed by GitHub
parent d6f7c615c0
commit cdafa05fd5
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1 changed files with 40 additions and 19 deletions
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59
Lib/test/test_bytes.py
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@ -1885,16 +1885,43 @@ class AssortedBytesTest(unittest.TestCase):
# Test various combinations of bytes and bytearray
#
def test_bytes_repr(self, f=repr):
self.assertEqual(f(b''), "b''")
self.assertEqual(f(b"abc"), "b'abc'")
self.assertEqual(f(bytes([92])), r"b'\\'")
self.assertEqual(f(bytes([0, 1, 254, 255])), r"b'\x00\x01\xfe\xff'")
self.assertEqual(f(b'\a\b\t\n\v\f\r'), r"b'\x07\x08\t\n\x0b\x0c\r'")
self.assertEqual(f(b'"'), """b'"'""") # '"'
self.assertEqual(f(b"'"), '''b"'"''') # "'"
self.assertEqual(f(b"'\""), r"""b'\'"'""") # '\'"'
self.assertEqual(f(b"\"'\""), r"""b'"\'"'""") # '"\'"'
self.assertEqual(f(b"'\"'"), r"""b'\'"\''""") # '\'"\''
self.assertEqual(f(BytesSubclass(b"abc")), "b'abc'")
def test_bytearray_repr(self, f=repr):
self.assertEqual(f(bytearray()), "bytearray(b'')")
self.assertEqual(f(bytearray(b'abc')), "bytearray(b'abc')")
self.assertEqual(f(bytearray([92])), r"bytearray(b'\\')")
self.assertEqual(f(bytearray([0, 1, 254, 255])),
r"bytearray(b'\x00\x01\xfe\xff')")
self.assertEqual(f(bytearray([7, 8, 9, 10, 11, 12, 13])),
r"bytearray(b'\x07\x08\t\n\x0b\x0c\r')")
self.assertEqual(f(bytearray(b'"')), """bytearray(b'"')""") # '"'
self.assertEqual(f(bytearray(b"'")), r'''bytearray(b"\'")''') # "\'"
self.assertEqual(f(bytearray(b"'\"")), r"""bytearray(b'\'"')""") # '\'"'
self.assertEqual(f(bytearray(b"\"'\"")), r"""bytearray(b'"\'"')""") # '"\'"'
self.assertEqual(f(bytearray(b'\'"\'')), r"""bytearray(b'\'"\'')""") # '\'"\''
self.assertEqual(f(ByteArraySubclass(b"abc")), "ByteArraySubclass(b'abc')")
self.assertEqual(f(ByteArraySubclass.Nested(b"abc")), "Nested(b'abc')")
self.assertEqual(f(ByteArraySubclass.Ŭñıçöđë(b"abc")), "Ŭñıçöđë(b'abc')")
@check_bytes_warnings
def test_repr_str(self):
for f in str, repr:
self.assertEqual(f(bytearray()), "bytearray(b'')")
self.assertEqual(f(bytearray([0])), "bytearray(b'\\x00')")
self.assertEqual(f(bytearray([0, 1, 254, 255])),
"bytearray(b'\\x00\\x01\\xfe\\xff')")
self.assertEqual(f(b"abc"), "b'abc'")
self.assertEqual(f(b"'"), '''b"'"''') # '''
self.assertEqual(f(b"'\""), r"""b'\'"'""") # '
def test_bytes_str(self):
self.test_bytes_repr(str)
@check_bytes_warnings
def test_bytearray_str(self):
self.test_bytearray_repr(str)
@check_bytes_warnings
def test_format(self):
@ -1947,15 +1974,6 @@ def test_from_bytearray(self):
b = bytearray(buf)
self.assertEqual(b, bytearray(sample))
@check_bytes_warnings
def test_to_str(self):
self.assertEqual(str(b''), "b''")
self.assertEqual(str(b'x'), "b'x'")
self.assertEqual(str(b'\x80'), "b'\\x80'")
self.assertEqual(str(bytearray(b'')), "bytearray(b'')")
self.assertEqual(str(bytearray(b'x')), "bytearray(b'x')")
self.assertEqual(str(bytearray(b'\x80')), "bytearray(b'\\x80')")
def test_literal(self):
tests = [
(b"Wonderful spam", "Wonderful spam"),
@ -2163,7 +2181,10 @@ def __init__(me, *args, **kwargs):
class ByteArraySubclass(bytearray):
pass
class Nested(bytearray):
pass
class Ŭñıçöđë(bytearray):
pass
class ByteArraySubclassWithSlots(bytearray):
__slots__ = ('x', 'y', '__dict__')