[rspec-users] Testing a rails controller *outside* of spec/controllers

Nicolás Sanguinetti godfoca at gmail.com
Thu Mar 11 05:09:47 EST 2010


Interesting:

describe SomeModule do
  describe "Bar", :type => :controller do
    controller_name "blah"
  end
end

Doesn't work, while

describe SomeModule do
end

describe "Bar", :type => :controller do
  controller_name "blah"
end

does.

2010/3/11 Nicolás Sanguinetti <godfoca at gmail.com>:
> On Thu, Mar 11, 2010 at 5:10 AM, Scott Taylor <scott at railsnewbie.com> wrote:
>>
>> On Mar 11, 2010, at 1:26 AM, Nicolás Sanguinetti wrote:
>>
>>> We have an app that has "extensions" that are built as rails engines.
>>> Each engine needs some code in the controllers, which we solved as
>>> "include this module, call a method". In order to test it, though, we
>>> don't want to "copy" the test for how that works into each engine, so
>>> the idea is to write the tests once, in 'spec/lib/extensions_spec.rb',
>>> where we are testing the other stuff that's common for all the
>>> extensions (which are defined on lib/extensions.rb, thus the spec's
>>> location)
>>>
>>> In order to do it, I'm declaring a 'sample' controller in the specs
>>> (just include the module, call the method), and then writing a couple
>>> specs for what we are doing. Problem is, I can't get rspec to
>>> understand that that example group is a controller example groups.
>>>
>>> I have
>>>
>>>    class MyExampleController < ApplicationController
>>>      include Extensions::ControllerHelpers
>>>      call_awesome_method # this, among other things, defines an
>>> instance method on the controller that I want to test
>>>    end
>>>
>>> inside my spec, and after that I tried:
>>>
>>> 1) describe("controller helpers", :type => :controller) {
>>> controller_name "my_example"; ... }
>>>
>>> It complains about controller_name not being a method of this dynamic
>>> subclass of ActiveSupport::TestCase.
>>
>> That seems like a really strange error.  What is the actual stack trace?
>
> ./spec/lib/extensions_spec.rb:20: undefined method `controller_name'
> for ActiveSupport::TestCase::Subclass_1:Class (NoMethodError)
>        from $gem_path/rspec-1.3.0/lib/spec/example/example_group_methods.rb:183:in
> `module_eval'
>        from $gem_path/rspec-1.3.0/lib/spec/example/example_group_methods.rb:183:in
> `subclass'
>        from $gem_path/rspec-1.3.0/lib/spec/example/example_group_methods.rb:55:in
> `describe'
>        from $gem_path/rspec-1.3.0/lib/spec/example/example_group_factory.rb:31:in
> `create_example_group'
>        from $gem_path/rspec-1.3.0/lib/spec/dsl/main.rb:28:in `describe'
>        from ./spec/lib/extensions_spec.rb:19
>        from $gem_path/activesupport-2.3.5/lib/active_support/dependencies.rb:147:in
> `load_without_new_constant_marking'
>        from $gem_path/activesupport-2.3.5/lib/active_support/dependencies.rb:147:in
> `load'
>        from $gem_path/rspec-1.3.0/lib/spec/runner/example_group_runner.rb:15:in
> `load_files'
>        from $gem_path/rspec-1.3.0/lib/spec/runner/example_group_runner.rb:14:in `each'
>        from $gem_path/rspec-1.3.0/lib/spec/runner/example_group_runner.rb:14:in
> `load_files'
>        from $gem_path/rspec-1.3.0/lib/spec/runner/options.rb:133:in `run_examples'
>        from $gem_path/rspec-1.3.0/lib/spec/runner/command_line.rb:9:in `run'
>        from script/spec:10
>
> (sanitized it a bit)
>
>> What versions of the test-unit gem do you have installed?  What version of rails?  rspec?  If you uninstall the test-unit gem, will it work with the :type => :controller hash given to describe?
>
> This is using rails 2.3.5, rspec 1.3.0, and rspec-rails 1.3.2. I do
> not have test-unit on this system, I have mocha 0.9.8 (though it
> shouldn't be required in the environment by anyone here)
>
>> (I've noticed *very* strange things with the test-unit gem installed in the past - such as a test suite which was 100% green, using a hybrid of mocha + rspec mocks/stubs.  When the gem was uninstalled, half the test suite failed!)
>>
>>> After some time reading the source I figured that :type => :controller
>>> pretty much just works for config.include/config.extend. So on to the
>>> next thing:
>>
>> Have you taken a look at Spec::Example::ExampleGroupFactory?
>
> Ah, darn, I hadn't gotten that far into rspec's rabbit hole, and
> missed the reference in rspec-rails. That's what you get for trying to
> debug stuff at 4am :) So, :type => :controller should be enough, then.
>
> Still, doing:
>
> describe MyExampleController, :type => :controller do
>  it "should do stuff" do
>    controller.should_receive(:foo)
>    controller.extension.bar
>  end
> end
>
> Fails with 'undefined local variable or method `controller' for
> #<ActiveSupport::TestCase::Subclass_1::Subclass_4:0x1075ca230>'
>
> And replacing controller with @controller gives me 'undefined method
> `bar' for nil:NilClass'. Which is pretty much the same results I got a
> few hours ago before going to sleep :(
>
> …So :type => :controller is apparently not enough for rspec to pick up on this.
>
>> Not sure if this will help, but here's a patch that brynary and I banged out way back in rspec 1.1.9 to support spec/unit & spec/integration: (the usual disclaimer applies - all the good parts are his, all the bad parts are mine)
>>
>> http://gist.github.com/328919
>
> Thanks :)
>
>> That piece of the code might at least take you to a place where you can debug what's going on.
>>
>> Best,
>>
>> Scott
>>
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>


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