I've deployed an app to Heroku, and it all works fine. The problem is I can't get my unit tests running remotely. I've tried:
我已经向Heroku部署了一个应用程序，一切正常。问题是我无法远程运行我的单元测试。我试过了：
heroku rake test:units
and
和
heroku rake db:test:prepare
but for both I get a massive stack trace, ending with:
但对于我来说，我得到了一个巨大的堆栈跟踪，结束于：
rake aborted!
undefined method `[]' for nil:NilClass
/app/[id]/home/.bundle/gems/ruby/1.9.1/gems/activerecord-3.0.3/lib/active_record/railties/databases.rake:429:in `block (3 levels) in <top (required)>'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:634:in `call'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:634:in `block in execute'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:629:in `each'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:629:in `execute'
I'm running the bamboo-mri-1.9.2 stack.
我正在运行bamboo-mri-1.9.2堆栈。
The closest I've got to an answer so far is this blog post from 2009.
到目前为止，我最接近答案的是2009年的博客文章。
4 个解决方案
#1
7
Heroku doesn't provide a testing database, so there's no straightforward way to do that. You could theoretically create a new heroku instance and hack up the rake tasks to just use the 'production' database possibly, but I doubt the effort required would be worth it.
Heroku不提供测试数据库，因此没有直接的方法可以做到这一点。理论上你可以创建一个新的heroku实例并且可以将rake任务破解为仅仅使用'production'数据库，但是我怀疑所需的努力是值得的。
#2
6
Heroku devcenter provides an explanation about how managing a staging environment here : http://devcenter.heroku.com/articles/multiple-environments
Heroku devcenter提供了有关如何管理暂存环境的说明：http：//devcenter.heroku.com/articles/multiple-environments
I don't know if it possible to run unit tests but I perfectly understand why you want to do this.
我不知道是否可以运行单元测试，但我完全理解你为什么要这样做。
Your Heroku application:
你的Heroku申请：
- may have different gems from you local system (as far as I know, if you develop under Windows, your Gemfile.lock is ignored)
- 你本地系统可能有不同的宝石（据我所知，如果你在Windows下开发，你的Gemfile.lock会被忽略）
- may have a different OS (some Ruby libraries as IO does not behave exactely the same way on Windows and Linux)
- 可能有一个不同的操作系统（一些Ruby库，因为IO在Windows和Linux上的行为方式不同）
- may have a different ruby version
- 可能有不同的红宝石版本
- may have a different database system (it seems not so easy to use a local database with the exact same configuration as the one you use on Heroku)
- 可能有一个不同的数据库系统（使用与您在Heroku上使用的配置完全相同的配置似乎不那么容易）
- more generally speaking, will run on a different system (Linux version, ImageMagick, etc.)
- 更一般地说，将在不同的系统上运行（Linux版本，ImageMagick等）
You can test all that with a staging environment but we could say that for every unit test, so I think it would be great if we could run unit test on Heroku.
您可以使用暂存环境测试所有这些，但我们可以说对于每个单元测试，所以我认为如果我们可以在Heroku上运行单元测试会很棒。
#3
5
The normal way is to do the testing locally, then deploy to a hidden Heroku instance ("staging"). Then you can test that hidden staging app with your beta testers, run stress tests on it and so on. If you are satisfied with it, deploy your app to your "production" Heroku instance.
通常的方法是在本地进行测试，然后部署到隐藏的Heroku实例（“staging”）。然后，您可以使用Beta测试人员测试该隐藏的临时应用程序，对其运行压力测试等等。如果您对此感到满意，请将您的应用程序部署到“生产”Heroku实例。
So testing on Heroku is possible and usual, but not with unit tests.
因此，在Heroku上进行测试是可能的，也可以是常规，但不能进行单元测试
#4
2
Heroku does not have the test suite, you really should be testing on development side before deployment to heroku.
Heroku没有测试套件，在部署到heroku之前，你真的应该在开发方面进行测试。
#1
7
Heroku doesn't provide a testing database, so there's no straightforward way to do that. You could theoretically create a new heroku instance and hack up the rake tasks to just use the 'production' database possibly, but I doubt the effort required would be worth it.
Heroku不提供测试数据库，因此没有直接的方法可以做到这一点。理论上你可以创建一个新的heroku实例并且可以将rake任务破解为仅仅使用'production'数据库，但是我怀疑所需的努力是值得的。
#2
6
Heroku devcenter provides an explanation about how managing a staging environment here : http://devcenter.heroku.com/articles/multiple-environments
Heroku devcenter提供了有关如何管理暂存环境的说明：http：//devcenter.heroku.com/articles/multiple-environments
I don't know if it possible to run unit tests but I perfectly understand why you want to do this.
我不知道是否可以运行单元测试，但我完全理解你为什么要这样做。
Your Heroku application:
你的Heroku申请：
- may have different gems from you local system (as far as I know, if you develop under Windows, your Gemfile.lock is ignored)
- 你本地系统可能有不同的宝石（据我所知，如果你在Windows下开发，你的Gemfile.lock会被忽略）
- may have a different OS (some Ruby libraries as IO does not behave exactely the same way on Windows and Linux)
- 可能有一个不同的操作系统（一些Ruby库，因为IO在Windows和Linux上的行为方式不同）
- may have a different ruby version
- 可能有不同的红宝石版本
- may have a different database system (it seems not so easy to use a local database with the exact same configuration as the one you use on Heroku)
- 可能有一个不同的数据库系统（使用与您在Heroku上使用的配置完全相同的配置似乎不那么容易）
- more generally speaking, will run on a different system (Linux version, ImageMagick, etc.)
- 更一般地说，将在不同的系统上运行（Linux版本，ImageMagick等）
You can test all that with a staging environment but we could say that for every unit test, so I think it would be great if we could run unit test on Heroku.
您可以使用暂存环境测试所有这些，但我们可以说对于每个单元测试，所以我认为如果我们可以在Heroku上运行单元测试会很棒。
#3
5
The normal way is to do the testing locally, then deploy to a hidden Heroku instance ("staging"). Then you can test that hidden staging app with your beta testers, run stress tests on it and so on. If you are satisfied with it, deploy your app to your "production" Heroku instance.
通常的方法是在本地进行测试，然后部署到隐藏的Heroku实例（“staging”）。然后，您可以使用Beta测试人员测试该隐藏的临时应用程序，对其运行压力测试等等。如果您对此感到满意，请将您的应用程序部署到“生产”Heroku实例。
So testing on Heroku is possible and usual, but not with unit tests.
因此，在Heroku上进行测试是可能的，也可以是常规，但不能进行单元测试
#4
2
Heroku does not have the test suite, you really should be testing on development side before deployment to heroku.
Heroku没有测试套件，在部署到heroku之前，你真的应该在开发方面进行测试。