diff --git a/Lib/test/test_capi/test_bytearray.py b/Lib/test/test_capi/test_bytearray.py
index 39099f6b82240f..699fc9d0589e1d 100644
--- a/Lib/test/test_capi/test_bytearray.py
+++ b/Lib/test/test_capi/test_bytearray.py
@@ -20,6 +20,7 @@ class CAPITest(unittest.TestCase):
def test_check(self):
# Test PyByteArray_Check()
check = _testlimitedcapi.bytearray_check
+ self.assertTrue(check(bytearray(b'')))
self.assertTrue(check(bytearray(b'abc')))
self.assertFalse(check(b'abc'))
self.assertTrue(check(ByteArraySubclass(b'abc')))
@@ -33,6 +34,7 @@ def test_check(self):
def test_checkexact(self):
# Test PyByteArray_CheckExact()
check = _testlimitedcapi.bytearray_checkexact
+ self.assertTrue(check(bytearray(b'')))
self.assertTrue(check(bytearray(b'abc')))
self.assertFalse(check(b'abc'))
self.assertFalse(check(ByteArraySubclass(b'abc')))
@@ -78,7 +80,7 @@ def test_fromobject(self):
def test_size(self):
# Test PyByteArray_Size()
size = _testlimitedcapi.bytearray_size
-
+ self.assertEqual(size(bytearray(b'')), 0)
self.assertEqual(size(bytearray(b'abc')), 3)
self.assertEqual(size(ByteArraySubclass(b'abc')), 3)
@@ -89,7 +91,7 @@ def test_size(self):
def test_asstring(self):
"""Test PyByteArray_AsString()"""
asstring = _testlimitedcapi.bytearray_asstring
-
+ self.assertEqual(asstring(bytearray(b''), 1), b'\0')
self.assertEqual(asstring(bytearray(b'abc'), 4), b'abc\0')
self.assertEqual(asstring(ByteArraySubclass(b'abc'), 4), b'abc\0')
self.assertEqual(asstring(bytearray(b'abc\0def'), 8), b'abc\0def\0')
@@ -105,6 +107,7 @@ def test_concat(self):
ba = bytearray(b'abc')
self.assertEqual(concat(ba, b'def'), bytearray(b'abcdef'))
self.assertEqual(ba, b'abc')
+ self.assertEqual(concat(ba, ba), bytearray(b'abcabc'))
self.assertEqual(concat(b'abc', b'def'), bytearray(b'abcdef'))
self.assertEqual(concat(b'a\0b', b'c\0d'), bytearray(b'a\0bc\0d'))
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