add checks in test

Author: iritkatriel

Lib/test/test_opcache.py

@@ -1364,10 +1364,13 @@ def binary_op_add_extend():
 
         def binary_op_bitwise_extend():
             for _ in range(100):
-                a, b = 1, 2
+                a, b = 2, 7
                 x = a | b
+                self.assertEqual(x, 7)
                 y = a & b
+                self.assertEqual(y, 2)
                 z = a ^ b
+                self.assertEqual(z, 5)
 
         binary_op_bitwise_extend()
         self.assert_specialized(binary_op_bitwise_extend, "BINARY_OP_EXTEND")