Issue #26837: assertSequenceEqual() now correctly outputs non-stringified

differing items (like bytes in the -b mode).  This affects assertListEqual()
and assertTupleEqual().

1 files changed, 76 insertions, 0 deletions

diff --git a/Lib/unittest/test/test_case.py b/Lib/unittest/test/test_case.py
index ada733b..1fb95dc 100644
--- a/Lib/unittest/test/test_case.py
+++ b/Lib/unittest/test/test_case.py
@@ -1121,6 +1121,82 @@ test case
             error = str(e).split('\n', 1)[1]
             self.assertEqual(sample_text_error, error)
 
+    def testEqualityBytesWarning(self):
+        if sys.flags.bytes_warning:
+            def bytes_warning():
+                return self.assertWarnsRegex(BytesWarning,
+                            'Comparison between bytes and string')
+        else:
+            def bytes_warning():
+                return contextlib.ExitStack()
+
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertEqual('a', b'a')
+        with bytes_warning():
+            self.assertNotEqual('a', b'a')
+
+        a = [0, 'a']
+        b = [0, b'a']
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertListEqual(a, b)
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertTupleEqual(tuple(a), tuple(b))
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertSequenceEqual(a, tuple(b))
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertSequenceEqual(tuple(a), b)
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertSequenceEqual('a', b'a')
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertSetEqual(set(a), set(b))
+
+        with self.assertRaises(self.failureException):
+            self.assertListEqual(a, tuple(b))
+        with self.assertRaises(self.failureException):
+            self.assertTupleEqual(tuple(a), b)
+
+        a = [0, b'a']
+        b = [0]
+        with self.assertRaises(self.failureException):
+            self.assertListEqual(a, b)
+        with self.assertRaises(self.failureException):
+            self.assertTupleEqual(tuple(a), tuple(b))
+        with self.assertRaises(self.failureException):
+            self.assertSequenceEqual(a, tuple(b))
+        with self.assertRaises(self.failureException):
+            self.assertSequenceEqual(tuple(a), b)
+        with self.assertRaises(self.failureException):
+            self.assertSetEqual(set(a), set(b))
+
+        a = [0]
+        b = [0, b'a']
+        with self.assertRaises(self.failureException):
+            self.assertListEqual(a, b)
+        with self.assertRaises(self.failureException):
+            self.assertTupleEqual(tuple(a), tuple(b))
+        with self.assertRaises(self.failureException):
+            self.assertSequenceEqual(a, tuple(b))
+        with self.assertRaises(self.failureException):
+            self.assertSequenceEqual(tuple(a), b)
+        with self.assertRaises(self.failureException):
+            self.assertSetEqual(set(a), set(b))
+
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertDictEqual({'a': 0}, {b'a': 0})
+        with self.assertRaises(self.failureException):
+            self.assertDictEqual({}, {b'a': 0})
+        with self.assertRaises(self.failureException):
+            self.assertDictEqual({b'a': 0}, {})
+
+        with self.assertRaises(self.failureException):
+            self.assertCountEqual([b'a', b'a'], [b'a', b'a', b'a'])
+        with bytes_warning():
+            self.assertCountEqual(['a', b'a'], ['a', b'a'])
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertCountEqual(['a', 'a'], [b'a', b'a'])
+        with bytes_warning(), self.assertRaises(self.failureException):
+            self.assertCountEqual(['a', 'a', []], [b'a', b'a', []])
+
     def testAssertIsNone(self):
         self.assertIsNone(None)
         self.assertRaises(self.failureException, self.assertIsNone, False)