问题:在尝试在我的合同中实现ERC20令牌时，面临以下Truffle测试用例的问题。
contract("Token Test", async(accounts) => {
const[deployerAccount, recipient, anotherAccount] = accounts;
it("All tokens should be in deployer's account", async() => {
let instance = await Token.deployed();
let totalSupply = await instance.totalSupply();
// let balance = await instance.balanceOf(accounts[0]);
// assert.equal(balance.valueOf(), totalSupply.valueOf(), "The Balance Was not same");
expect(instance.balanceOf(deployerAccount)).to.eventually.be.a.bignumber.equal(totalSupply);
});
it("Is possible to send tokens between accounts", async() => {
const sendToken = 1;
let instance = await Token.deployed();
let totalSupply = await instance.totalSupply();
expect(instance.balanceOf(deployerAccount)).to.eventually.be.a.bignumber.equal(totalSupply);
expect(instance.transfer(recipient, sendToken)).to.eventually.be.fulfilled;
expect(instance.balanceOf(deployerAccount)).to.eventually.be.a.bignumber.equal(totalSupply.sub(new BN(sendToken)));
expect(instance.balanceOf(recipient)).to.eventually.be.a.bignumber.equal(new BN(sendToken));
});
it("Should not be able to send more token than available with owner", async() => {
let instance = await Token.deployed();
let balanceOfDeployer = await instance.balanceOf(deployerAccount);
console.log(balanceOfDeployer+ " : " + await instance.balanceOf(deployerAccount));
// expect(instance.transfer(recipient, new BN(balanceOfDeployer+3))).to.eventually.be.rejected;
expect(instance.balanceOf(deployerAccount)).to.eventually.be.a.bignumber.equal(balanceOfDeployer);
});
});
描述:当我试图同时执行测试用例2和3时，它失败了，出现以下错误:
"before all" hook: prepare suite for "Should not be able to send more token than available with owner":
Uncaught AssertionError: expected '1000000000' to equal '999999999'
+ expected - actual
-1000000000
+999999999
at /project_dir/node_modules/chai-as-promised/lib/chai-as-promised.js:302:22
at processTicksAndRejections (internal/process/task_queues.js:95:5)
UnhandledRejections detected
Promise {
<rejected> AssertionError: expected '1000000000' to equal '999999999'
at /project_dir/node_modules/chai-as-promised/lib/chai-as-promised.js:302:22
at processTicksAndRejections (internal/process/task_queues.js:95:5) {
showDiff: true,
actual: '1000000000',
expected: '999999999',
operator: 'strictEqual',
uncaught: true
}
然而，当我尝试独立执行两个测试用例时(注释测试用例2保留测试用例3，反之亦然)。它们工作得很好，没有任何错误。
需要帮助了解我在这里错过了什么以及如何修复它。
我尝试过的事情:最初，我认为这可能是由于测试用例2中变量的状态变化而发生的。因此，我将测试用例3移动到一个新的契约()中。但我仍然面临着同样的问题。然而，这应该不会发生，因为contract()在执行每个合同测试之前提供了一个干净的环境。
注::我在合同的构造函数中初始化totalSupply的值为1000000000。
在我试图与合同沟通的每个expect()之前添加等待。这有助于解决问题。