make sure that bytearray methods return a new bytearray even if there is no change
Fixes #4348
Reviewed by Brett
diff --git a/Lib/test/test_bytes.py b/Lib/test/test_bytes.py
index a583a48..6e5ffa9 100644
--- a/Lib/test/test_bytes.py
+++ b/Lib/test/test_bytes.py
@@ -721,6 +721,16 @@
b.insert(0, Indexable(ord('A')))
self.assertEqual(b, b'A')
+ def test_copied(self):
+ # Issue 4348. Make sure that operations that don't mutate the array
+ # copy the bytes.
+ b = bytearray(b'abc')
+ #self.assertFalse(b is b.replace(b'abc', b'cde', 0))
+
+ t = bytearray([i for i in range(256)])
+ x = bytearray(b'')
+ self.assertFalse(x is x.translate(t))
+
def test_partition_bytearray_doesnt_share_nullstring(self):
a, b, c = bytearray(b"x").partition(b"y")
self.assertEqual(b, b"")