我如何正确地断言这一点？

Question

假设我想为这份合同样本做一个测试：

// assume we import OpenZeppelin's Ownable

contract Metaverse extends Ownable, ... {
    ...
    // Assume this is just to experiment and learn.
    // Then I can question myself how useful is to
    // actually do this, and why.
    function renounceOwnership() public override onlyOwner {
        revert("I explicitly disabled this method");
    }
    ...
}

而且，使用块菌石，我希望对该方法何时恢复进行测试：

const Metaverse = artifacts.require("Metaverse");

contract("Metaverse", function (accounts) {
  const deployer = accounts[0];
  const newOwner = accounts[1];

  it("respects the safe-ownership appropriately", async function () {
    let metaverse = await Metaverse.deployed();

    try
    {
      metaverse.renounceOwnership({from: deployer});
      assert.fail("Ownership should not be rejected");
    }
    catch(e) { /* Ok :) - It will be an AssertionError */ }
  });
});

到目前为止，这是可行的，但我想让它变得更干净。所以我把我的问题分成两部分：

1. 当方法恢复时，是否有一个标准的、更干净的/更好的方法来断言？
2. 如果没有:我如何测试e是AssertionError类型的？从哪里导入断言错误？

Answer 1

您可以在revertedWith柴Matcher：https://ethereum-waffle.readthedocs.io/en/latest/matchers.html#revert-with-message中使用Waffle

在这里可以看到一个例子：https://github.com/gnosis/safe-contracts/blob/main/test/libraries/MultiSend.spec.ts#L51