如何在 Truffle 测试中调用成员函数？

Question

考虑以下设置：

contract A {
    B public b = new B();
}

contract B {
    function C() public pure returns (uint c)
    {
        c = 5;
    }
}

从 Truffle 测试中，有一个 A 的实例，如何调用函数 C？

Answer 1

这里有一个关于如何在 Truffle 测试中调用 C 的例子：

const A = artifacts.require('A')
const B = artifacts.require('B')

contract('A', function(accounts) {
    it('should be possible to call C', async function() {
        let a = await A.new({from: accounts[0]})
        let addressOfB = await a.b();
        let contractB = web3.eth.contract(B.abi)
        let b = contractB.at(addressOfB)
        console.log("Output of C: " + await (b.C()).toNumber());
    })
})

Contract: A

Output of C: 5

✓ should be possible to call C (380ms)

1 passing (400ms)

如何在 Truffle 测试中调用成员函数？

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