Question

我一直在编写自动化测试，用他们的测试服务（我认为使用Mocha和Chai）测试我在Truffle的众包功能。我无法理解为什么测试不确定地失败（即它们似乎在随机点失败，随机例外）。

EG / 我运行我的测试，有时他们都通过了

我运行测试，有时收到此错误消息：

✓ deadline is set when beneficiary clicks start
✓ should return a State of 'Funding' after start is clicked (101ms)
✓ should allow someone to invest and record balance
✓ should send 1 ERC20 token to participant (184ms)
✓ softcap should not return reached when amountRaised is smaller
✓ softcap should return reached when amountRaised is bigger
✓ hardcap should not return reached when amountRaised is smaller
✓ hardcap should return reached when amountRaised is bigger
1) should give 1 ETH in change as hard cap was exceeded
> No events were emitted
✓ should return a State of 'Successful' when hardcap reached
✓ beneficiary should be able to withdraw funds
✓ should return a State of 'Finished' when beneficiary has funds


22 passing (2s)
1 failing

1) Contract: Sale should give 1 ETH in change as hard cap was exceeded:
 Uncaught AssertionError: deadline was not set after start pressed by beneficiary: expected '0' to not equal 0
  at test/2Crowdsale_Test.js:119:14
  at <anonymous>
  at process._tickDomainCallback (internal/process/next_tick.js:228:7)



 1
 truffle(develop)> 
 /usr/local/lib/node_modules/truffle/build/cli.bundled.js:320098
    throw reason;
    ^

 TypeError: Cannot read property 'currentRetry' of undefined
at 

/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runner.js: 
552:28
at done 
(/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runnable.js 
:295:5)
at 
/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runnable.js: 
359:11
at <anonymous>
at process._tickDomainCallback (internal/process/next_tick.js:228:7)

这是令人困惑的，因为断言与错误消息不匹配 - 更改断言失败但是，返回的消息是先前通过的测试的一部分（在受益人点击开始时设置截止日期）。

我再次运行测试：

✓ approves contract by beneficiary
✓ should return a State of 'Not Started' before start is clicked (134ms)
✓ deadline is set when beneficiary clicks start
✓ should return a State of 'Funding' after start is clicked (98ms)
✓ should allow someone to invest and record balance
✓ should send 1 ERC20 token to participant (143ms)
✓ softcap should not return reached when amountRaised is smaller
✓ softcap should return reached when amountRaised is bigger
✓ hardcap should not return reached when amountRaised is smaller
✓ hardcap should return reached when amountRaised is bigger
1) should give 1 ETH in change as hard cap was exceeded
> No events were emitted
2) should return a State of 'Successful' when hardcap reached

Events emitted during test:
---------------------------

Transfer(_from: <indexed>, _to: <indexed>, _value: 5)
FundTransfer(backer: 0xf17f52151ebef6c7334fad080c5704d77216b732, amount: 5000000000000000000, isContribution: true)
reachedSoftCap(recipient: 0x627306090abab3a6e1400e9345bc60c78a8bef57, totalAmountRaised: 6000000000000000000)

---------------------------
✓ beneficiary should be able to withdraw funds
✓ should return a State of 'Finished' when beneficiary has funds


21 passing (2s)
2 failing

1) Contract: Sale should give 1 ETH in change as hard cap was exceeded:
 Uncaught AssertionError: deadline was not set after start pressed by beneficiary: expected '0' to not equal 0
  at test/2Crowdsale_Test.js:119:14
  at <anonymous>
  at process._tickDomainCallback (internal/process/next_tick.js:228:7)

2) Contract: Sale should return a State of 'Successful' when hardcap reached:
 Uncaught AssertionError: hardcap was not met when amountRaised was bigger: expected false to equal true
  at test/2Crowdsale_Test.js:195:14
  at <anonymous>
  at process._tickDomainCallback (internal/process/next_tick.js:228:7)



  2
  truffle(develop)> 
  /usr/local/lib/node_modules/truffle/build/cli.bundled.js:320098
    throw reason;
    ^

  TypeError: Cannot set property 'state' of undefined
  at 
  /usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runner.js: 
  576:20
  at done 
(/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runnable.js 
:295:5)
at /usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runnable.js:353:11
at <anonymous>
at process._tickDomainCallback (internal/process/next_tick.js:228:7)

我现在有了上一条错误消息，现在再次抛出另一条错误消息，错误消息与断言错误不匹配。

我第四次运行测试：

✓ should allow someone to invest and record balance
✓ should send 1 ERC20 token to participant (120ms)
✓ softcap should not return reached when amountRaised is smaller
✓ softcap should return reached when amountRaised is bigger
✓ hardcap should not return reached when amountRaised is smaller
✓ hardcap should return reached when amountRaised is bigger
✓ should give 1 ETH in change as hard cap was exceeded (275ms)
✓ should return a State of 'Successful' when hardcap reached (61ms)
✓ beneficiary should be able to withdraw funds
1) should return a State of 'Finished' when beneficiary has funds
> No events were emitted


 22 passing (2s)
 1 failing

 1) Contract: Sale should return a State of 'Finished' when beneficiary has funds:
 AssertionError: State of contract was not 'Finished': expected '4' to equal 6
  at test/2Crowdsale_Test.js:243:14
  at <anonymous>
  at process._tickDomainCallback (internal/process/next_tick.js:228:7)

这与前两个完全不同。这个也是令人困惑的，因为之前的测试（受益人应该能够提取资金）也测试州等于6并且该测试通过。

每次测试之前，我退出松露控制台，从项目中删除我的构建文件夹，重新进入松露控制台并进行测试（这样我可以假设链已被重置），但我仍然收到错误首先，没有意义，因为我在通过Dapp自己测试时没有得到这些结果，其次，每次都不显示，似乎随机时间随机错误。

有没有其他人遇到过这个问题？

Answer 1

这是令人困惑的，因为断言与错误消息不匹配 - 更改断言失败但是，返回的消息是先前通过的测试的一部分（在受益人点击开始时设置截止日期）。

这是非常典型的javaScript异步测试，您正在进行以太坊松露测试，或者仅仅是前端的普通Karma-Jasmine测试。

我非常有信心你在一些未正确设置的规范中的回调中有断言。规范传递是由于缺少调用'done'回调参数，或者因为你没有在it调用中正确返回Promise，所以测试只是作为误报传递，忽略了回调内容。 / p>

一段时间之后，回调中的代码会运行并失败，从而使运行测试失败，但是从测试中给出错误消息，并且假阴性 - 因为你在错误的测试中得到了异常从而使它失败。

这也可能是.catch语句调用done次调用造成的。

当然，也许我错了，你的问题与Truffle本身或testrpc完全相关。

如果您完全确定所有it规范都正确处理异步 - 无论是返回Promise还是调用done - ，那么您应该粘贴测试代码并等待更多反馈： - 小号

另外，您在测试期间使用testrpc作为区块链吗？

运行松露测试时的非确定性异常

1 个答案: