@@ -22,6 +22,7 @@ def test_check(self):
2222# Test PyBytes_Check()
2323check = _testlimitedcapi .bytes_check
2424self .assertTrue (check (b'abc' ))
25+ self .assertTrue (check (b'' ))
2526self .assertFalse (check ('abc' ))
2627self .assertFalse (check (bytearray (b'abc' )))
2728self .assertTrue (check (BytesSubclass (b'abc' )))
@@ -36,6 +37,7 @@ def test_checkexact(self):
3637# Test PyBytes_CheckExact()
3738check = _testlimitedcapi .bytes_checkexact
3839self .assertTrue (check (b'abc' ))
40+ self .assertTrue (check (b'' ))
3941self .assertFalse (check ('abc' ))
4042self .assertFalse (check (bytearray (b'abc' )))
4143self .assertFalse (check (BytesSubclass (b'abc' )))
@@ -108,6 +110,7 @@ def test_asstring(self):
108110
109111self .assertEqual (asstring (b'abc' ,4 ),b'abc\0 ' )
110112self .assertEqual (asstring (b'abc\0 def' ,8 ),b'abc\0 def\0 ' )
113+ self .assertEqual (asstring (b'' ,1 ),b'\0 ' )
111114self .assertRaises (TypeError ,asstring ,'abc' ,0 )
112115self .assertRaises (TypeError ,asstring ,object (),0 )
113116
@@ -120,6 +123,7 @@ def test_asstringandsize(self):
120123
121124self .assertEqual (asstringandsize (b'abc' ,4 ), (b'abc\0 ' ,3 ))
122125self .assertEqual (asstringandsize (b'abc\0 def' ,8 ), (b'abc\0 def\0 ' ,7 ))
126+ self .assertEqual (asstringandsize (b'' ,1 ), (b'\0 ' ,0 ))
123127self .assertEqual (asstringandsize_null (b'abc' ,4 ),b'abc\0 ' )
124128self .assertRaises (ValueError ,asstringandsize_null ,b'abc\0 def' ,8 )
125129self .assertRaises (TypeError ,asstringandsize ,'abc' ,0 )
@@ -163,6 +167,7 @@ def test_concat(self, concat=None):
163167self .assertEqual (concat (b'' ,bytearray (b'def' )),b'def' )
164168self .assertEqual (concat (memoryview (b'xabcy' )[1 :4 ],b'def' ),b'abcdef' )
165169self .assertEqual (concat (b'abc' ,memoryview (b'xdefy' )[1 :4 ]),b'abcdef' )
170+ self .assertEqual (concat (b'' ,b'' ),b'' )
166171
167172self .assertEqual (concat (b'abc' ,b'def' ,True ),b'abcdef' )
168173self .assertEqual (concat (b'abc' ,bytearray (b'def' ),True ),b'abcdef' )