Fix Faker byte-like object matching to allow None/empty values and exact match otherwise

Author: chenyunliang520

tests/fix_faker.py

@@ -315,6 +315,11 @@ def example(self, spec):
     def match_any(self, spec, got, want):
         if spec == dt.timedelta:
             assert abs((got - want).total_seconds()) < 86400 * 2
+        elif spec in (bytes, bytearray, memoryview):
+            if want in (b'', bytearray(b'')) or want is None:
+                assert got in (None, b'', bytearray(b''), memoryview(b''))
+            else:
+                assert got == want
         else:
             assert got == want