
Contract Test
+----------+-------------------+
| Function | require or assert |
+----------+-------------------+
+----------+-------------------+
Contract VM
+--------------+-------------------+
| Function     | require or assert |
+--------------+-------------------+
| expectRevert |                   |
| expectRevert |                   |
+--------------+-------------------+
Contract A
+----------+-------------------+
| Function | require or assert |
+----------+-------------------+
| b        |                   |
+----------+-------------------+
