运行 truffle 测试时的非确定性异常
Non-deterministic exceptions when running truffle tests
我一直在编写自动化测试，以使用他们的测试服务（我相信使用 Mocha 和 Chai）来测试我在 Truffle 中的众筹功能。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，有随机例外）。
例如/
我 运行 我的测试，有时它们都通过了
我 运行 我的测试有时会收到此错误消息：
✓ 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)
这令人困惑，因为断言与错误消息不匹配 - 更改断言失败但是，返回的消息是通过的早期测试的一部分（截止日期在受益人点击开始时设置）。
运行 再次测试我得到了：
✓ 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)
我现在有以前的错误信息，现在又抛出一个when，错误信息与断言错误不匹配。
运行第四次考试我得到了：
✓ 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)
这是一个与前两个完全不同的错误。这又一次令人困惑，因为之前的测试（受益人应该能够提取资金）也测试状态等于 6 并且该测试通过。
每次测试前，我退出 truffle 控制台，从项目中删除我的构建文件夹，重新进入 truffle 控制台并测试（这样我就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，不要每次都出现，它似乎是随机的时间和随机错误。
还有其他人遇到过这个问题吗？
This is confusing as the Assertion does not match the error message - the change assert fails however, the message that is returned is part of an earlier test which passed (deadline is set when beneficiary clicks start).
这是非常典型的 javaScript 异步测试，无论您是在进行以太坊松露测试还是只是从前端进行普通的 Karma-Jasmine 测试。
我相信您在某些未正确设置的规范中的回调中有断言。由于没有调用 'done' 回调参数，或者因为您没有在 it 调用中正确返回一个 Promise，所以规范通过，所以测试只是作为误报通过，忽略回调内容.
一段时间后，回调中的代码得到 运行 并失败，从而使 运行ning 测试失败，但给出了来自其测试的错误消息和漏报 -因为您在错误的测试中遇到了异常，从而使其失败。
这也可能是由 .catch 语句吞噬 done 调用引起的。
当然，也许我只是错了，你的问题确实与 Truffle 本身有关，或者与 testrpc.
有关
如果您绝对确定您的所有 it 规范都正确处理了异步 - 无论是返回 Promise 还是调用 done-，那么您应该粘贴您的测试代码并等待更多反馈:-S
此外，您在测试期间是否使用 testrpc 作为您的区块链？
我一直在编写自动化测试，以使用他们的测试服务（我相信使用 Mocha 和 Chai）来测试我在 Truffle 中的众筹功能。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，有随机例外）。
例如/ 我 运行 我的测试，有时它们都通过了
我 运行 我的测试有时会收到此错误消息：
✓ 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)
这令人困惑，因为断言与错误消息不匹配 - 更改断言失败但是，返回的消息是通过的早期测试的一部分（截止日期在受益人点击开始时设置）。
运行 再次测试我得到了：
✓ 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)
我现在有以前的错误信息，现在又抛出一个when，错误信息与断言错误不匹配。
运行第四次考试我得到了：
✓ 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)
这是一个与前两个完全不同的错误。这又一次令人困惑，因为之前的测试（受益人应该能够提取资金）也测试状态等于 6 并且该测试通过。
每次测试前，我退出 truffle 控制台，从项目中删除我的构建文件夹，重新进入 truffle 控制台并测试（这样我就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，不要每次都出现，它似乎是随机的时间和随机错误。
还有其他人遇到过这个问题吗？
This is confusing as the Assertion does not match the error message - the change assert fails however, the message that is returned is part of an earlier test which passed (deadline is set when beneficiary clicks start).
这是非常典型的 javaScript 异步测试，无论您是在进行以太坊松露测试还是只是从前端进行普通的 Karma-Jasmine 测试。
我相信您在某些未正确设置的规范中的回调中有断言。由于没有调用 'done' 回调参数，或者因为您没有在 it 调用中正确返回一个 Promise，所以规范通过，所以测试只是作为误报通过，忽略回调内容.
一段时间后，回调中的代码得到 运行 并失败，从而使 运行ning 测试失败，但给出了来自其测试的错误消息和漏报 -因为您在错误的测试中遇到了异常，从而使其失败。
这也可能是由 .catch 语句吞噬 done 调用引起的。
当然，也许我只是错了，你的问题确实与 Truffle 本身有关，或者与 testrpc.
如果您绝对确定您的所有 it 规范都正确处理了异步 - 无论是返回 Promise 还是调用 done-，那么您应该粘贴您的测试代码并等待更多反馈:-S
此外，您在测试期间是否使用 testrpc 作为您的区块链？