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[3.13] gh-131357: Add some extra tests for empty bytes and bytearray (GH-134458)#134490

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Merged
vstinner merged 1 commit intopython:3.13frommiss-islington:backport-7309eb6-3.13
May 22, 2025
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6 changes: 6 additions & 0 deletionsLib/test/test_capi/test_bytearray.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -66,6 +66,7 @@ def test_fromobject(self):
# Test PyByteArray_FromObject()
fromobject = _testlimitedcapi.bytearray_fromobject

self.assertEqual(fromobject(b''), bytearray(b''))
self.assertEqual(fromobject(b'abc'), bytearray(b'abc'))
self.assertEqual(fromobject(bytearray(b'abc')), bytearray(b'abc'))
self.assertEqual(fromobject(ByteArraySubclass(b'abc')), bytearray(b'abc'))
Expand DownExpand Up@@ -115,6 +116,7 @@ def test_concat(self):
self.assertEqual(concat(b'abc', bytearray(b'def')), bytearray(b'abcdef'))
self.assertEqual(concat(bytearray(b'abc'), b''), bytearray(b'abc'))
self.assertEqual(concat(b'', bytearray(b'def')), bytearray(b'def'))
self.assertEqual(concat(bytearray(b''), bytearray(b'')), bytearray(b''))
self.assertEqual(concat(memoryview(b'xabcy')[1:4], b'def'),
bytearray(b'abcdef'))
self.assertEqual(concat(b'abc', memoryview(b'xdefy')[1:4]),
Expand DownExpand Up@@ -150,6 +152,10 @@ def test_resize(self):
self.assertEqual(resize(ba, 0), 0)
self.assertEqual(ba, bytearray())

ba = bytearray(b'')
self.assertEqual(resize(ba, 0), 0)
self.assertEqual(ba, bytearray())

ba = ByteArraySubclass(b'abcdef')
self.assertEqual(resize(ba, 3), 0)
self.assertEqual(ba, bytearray(b'abc'))
Expand Down
3 changes: 3 additions & 0 deletionsLib/test/test_capi/test_bytes.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,6 +81,7 @@ def test_fromobject(self):
# Test PyBytes_FromObject()
fromobject = _testlimitedcapi.bytes_fromobject

self.assertEqual(fromobject(b''), b'')
self.assertEqual(fromobject(b'abc'), b'abc')
self.assertEqual(fromobject(bytearray(b'abc')), b'abc')
self.assertEqual(fromobject(BytesSubclass(b'abc')), b'abc')
Expand DownExpand Up@@ -138,6 +139,7 @@ def test_repr(self):
# Test PyBytes_Repr()
bytes_repr = _testlimitedcapi.bytes_repr

self.assertEqual(bytes_repr(b'', 0), r"""b''""")
self.assertEqual(bytes_repr(b'''abc''', 0), r"""b'abc'""")
self.assertEqual(bytes_repr(b'''abc''', 1), r"""b'abc'""")
self.assertEqual(bytes_repr(b'''a'b"c"d''', 0), r"""b'a\'b"c"d'""")
Expand DownExpand Up@@ -197,6 +199,7 @@ def test_decodeescape(self):
"""Test PyBytes_DecodeEscape()"""
decodeescape = _testlimitedcapi.bytes_decodeescape

self.assertEqual(decodeescape(b''), b'')
self.assertEqual(decodeescape(b'abc'), b'abc')
self.assertEqual(decodeescape(br'\t\n\r\x0b\x0c\x00\\\'\"'),
b'''\t\n\r\v\f\0\\'"''')
Expand Down
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