问题
I have a Rails3 app that is based on someone else's work. For some reason they decided not to supply the tests with the app, which I am finding frustrating.
What I want to be able to do is scaffold the tests for all the existing controllers and models so I can get a head start on creating the tests myself in test::unit. I don't want to recreate the models or controllers, just create the tests.
I am new to Rails, and have hunted about for the rake command that might do this, but all with no luck so far. Any advice / direction most appreciated.
回答1:
I know it's a little old, but you can do this:
rails g scaffold Post -s
The -s makes it skip the files already created. Also, if you don't use the flag it just asks you if you want to override the file, so, no worries.
回答2:
To only generate the associated test files for an existing Rails 3 app, I use "generate resource" but skip everything that I don't want:
rails g resource Post --skip --no-resource-route --no-migration --no-helper --no-assets
Other options can be found using rails generate resource --help
-s, [--skip] # Skip files that already exist
--resource-route # Indicates when to generate resource route
[--helper] # Indicates when to generate helper
[--assets] # Indicates when to generate assets
[--migration] # Indicates when to generate migration
Why not use generate scaffold? Because it might generate views that I'm not using.
回答3:
There's no way to do this that I'm aware of. It would be pretty easy though to just create a temporary rails project and generate scaffolds for all of your models then copy the resulting test directory into the real project.
I.e.
rails new temporary
cd temporary
rails g scaffold Post title:string body:text
rails g scaffold Comment post:references author:string body:text
cp -r test ../real_rails_app/
etc.
This answer is now out of date. Up to date rails versions allow you to generate only the missing files with the skip option.
来源：https://stackoverflow.com/questions/4365530/generate-only-tests-from-existing-model-controllers