Solidity 运行块菌测试时，Assert.equal不可用

我有一个简单的合同，我正试着用块菌为该合同编写坚固性测试。下面是代码示例-

File: dummycontract.sol

pragma solidity ^0.4.17;

contract DummyContract {

    uint[] public elements;

    function addElement(uint element) public {
        elements.push(element);
    }

    function getNumberOfElements() public view returns(uint) {
        uint numElements = uint(elements.length);
        return numElements;
    }

}

而测试文件—

pragma solidity ^0.4.17;

import "truffle/Assert.sol";
import "truffle/DeployedAddresses.sol";
import "../contracts/dummycontract.sol";

contract TestZombieFactory {

    function testInitialState() public {
        DummyContract dummyContract = DummyContract(DeployedAddresses.DummyContract());
        uint numberOfElements = dummyContract.getNumberOfElements();
        Assert.equal(numberOfElements == 0);
    }

}

在运行块菌测试时，我得到以下错误-

TypeError: Member "equal" is not available in type(library Assert) outside of storage.
        Assert.equal(numberOfElements == 0);

---

有人能给我解释一下吗

您使用的

Assert.equal（）

不正确。它需要两个值，并在函数中进行比较。函数签名是

function equal(uint A, uint B, string message) constant returns (bool result)

将测试合同更改为以下内容，它将起作用

pragma solidity ^0.4.17;

import "truffle/Assert.sol";
import "truffle/DeployedAddresses.sol";
import "../contracts/dummycontract.sol";

contract TestZombieFactory {
    function testInitialState() public {
        DummyContract dummyContract = DummyContract(DeployedAddresses.DummyContract());
        uint numberOfElements = dummyContract.getNumberOfElements();
        Assert.equal(numberOfElements, 0, "Number of elements should be 0");
    }
}

---

您使用的

Assert.equal（）

不正确。它需要两个值，并在函数中进行比较。函数签名是

function equal(uint A, uint B, string message) constant returns (bool result)

将测试合同更改为以下内容，它将起作用

pragma solidity ^0.4.17;

import "truffle/Assert.sol";
import "truffle/DeployedAddresses.sol";
import "../contracts/dummycontract.sol";

contract TestZombieFactory {
    function testInitialState() public {
        DummyContract dummyContract = DummyContract(DeployedAddresses.DummyContract());
        uint numberOfElements = dummyContract.getNumberOfElements();
        Assert.equal(numberOfElements, 0, "Number of elements should be 0");
    }
}

你应该替换

Assert.equal(numberOfElements == 0);

与

你应该替换

Assert.equal(numberOfElements == 0);

与

---

啊，好吧，我的错。谢谢啊，好吧，我的错。谢谢