move test into its own test function

Author: picnixz

Lib/test/test_memoryview.py

@@ -620,21 +620,9 @@ def check_equal(view, is_equal):
             m = memoryview(a.tobytes()).cast('n')
             check_equal(m, True)
 
-        # Test '?' format (keep all the checks below for UBSan)
+        # Test '?' format
         m = memoryview(b'\0\1\2').cast('?')
         check_equal(m, True)
-        # m1a and m1b are equivalent to [False, True, False]
-        m1a = memoryview(b'\0\2\0').cast('?')
-        self.assertEqual(m1a.tolist(), [False, True, False])
-        m1b = memoryview(b'\0\4\0').cast('?')
-        self.assertEqual(m1b.tolist(), [False, True, False])
-        self.assertEqual(m1a, m1b)
-        # m1a and m1b are equivalent to [True, True, True]
-        m2a = memoryview(b'\1\3\5').cast('?')
-        self.assertEqual(m2a.tolist(), [True, True, True])
-        m2b = memoryview(b'\2\4\6').cast('?')
-        self.assertEqual(m2b.tolist(), [True, True, True])
-        self.assertEqual(m2a, m2b)
 
         # Test float formats
         for float_format in 'fd':
@@ -660,6 +648,24 @@ def check_equal(view, is_equal):
                 m = memoryview(data).cast(complex_format)
                 check_equal(m, True)
 
+    def test_boolean_format(self):
+        # Test '?' format (keep all the checks below for UBSan)
+        # See github.com/python/cpython/issues/148390.
+
+        # m1a and m1b are equivalent to [False, True, False]
+        m1a = memoryview(b'\0\2\0').cast('?')
+        self.assertEqual(m1a.tolist(), [False, True, False])
+        m1b = memoryview(b'\0\4\0').cast('?')
+        self.assertEqual(m1b.tolist(), [False, True, False])
+        self.assertEqual(m1a, m1b)
+
+        # m2a and m2b are equivalent to [True, True, True]
+        m2a = memoryview(b'\1\3\5').cast('?')
+        self.assertEqual(m2a.tolist(), [True, True, True])
+        m2b = memoryview(b'\2\4\6').cast('?')
+        self.assertEqual(m2b.tolist(), [True, True, True])
+        self.assertEqual(m2a, m2b)
+
 
 class BytesMemorySliceTest(unittest.TestCase,
     BaseMemorySliceTests, BaseBytesMemoryTests):