rspec users - Jun 2012 - Mock UploadedFile object in controller params

Hi,

I''m trying to mock an UploadedFile object and pass it to a controller
action. Unfortunately, the mocked object gets stringified in the params hash, so
I''m not able to use the mock object in a test.

Is there any way to avoid this stringification for UploadedFile objects?

This has been discussed already on github:
https://github.com/rails/rails/pull/1203

As described, the params are stringified, but it should exclude
Rack::Test::UploadedFile:
https://github.com/rails/rails/pull/1203#issuecomment-1217081

Here is a small example:

let(:file) { mock(''UploadedFile'') }

it "tests something" do
  file.stub(:content_type).and_return ''text/plain''   # this
won''t work
  post :upload, { file: file }                                          # params
in controller will be "file" => "#[RSpec::Mock ... ]"
end

I get a NoMethodError: undefined method `content_type'' for
"#[RSpec::Mocks::Mock:0x3fe4723a81bc @name=\"file\"]":String

So, how can I test this?

Thanks,
David

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On Jun 20, 2012, at 4:18 AM, David Piegza wrote:
> Hi,
> 
> I''m trying to mock an UploadedFile object and pass it to a
controller action. Unfortunately, the mocked object gets stringified in the
params hash, so I''m not able to use the mock object in a test.
> 
> Is there any way to avoid this stringification for UploadedFile objects?
> 
> This has been discussed already on github:
https://github.com/rails/rails/pull/1203
> 
> As described, the params are stringified, but it should exclude
Rack::Test::UploadedFile:
https://github.com/rails/rails/pull/1203#issuecomment-1217081
> 
> Here is a small example:
> 
> let(:file) { mock(''UploadedFile'') }
> 
> it "tests something" do
>   file.stub(:content_type).and_return ''text/plain''   #
this won''t work
>   post :upload, { file: file }                                          #
params in controller will be "file" => "#[RSpec::Mock ...
]"
> end
> 
> I get a NoMethodError: undefined method `content_type'' for
"#[RSpec::Mocks::Mock:0x3fe4723a81bc @name=\"file\"]":String
> 
> So, how can I test this?
> 
> Thanks,
> David
> 
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
Rails has a built-in helper method for this:
http://api.rubyonrails.org/classes/ActionDispatch/TestProcess.html#method-i-fixture_file_upload

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Thanks for the hint. But I would like to mock the UploadedFile object (I
don''t want to load a file..).

My current workaround is to stub the params hash:
controller.stub(:params).and_return { file: file }

Would be nice if I could just pass in the mocked UploadedFile object...


On 21.06.2012, at 13:14, Justin Ko wrote:
> 
> On Jun 20, 2012, at 4:18 AM, David Piegza wrote:
> 
>> Hi,
>> 
>> I''m trying to mock an UploadedFile object and pass it to a
controller action. Unfortunately, the mocked object gets stringified in the
params hash, so I''m not able to use the mock object in a test.
>> 
>> Is there any way to avoid this stringification for UploadedFile
objects?
>> 
>> This has been discussed already on github:
https://github.com/rails/rails/pull/1203
>> 
>> As described, the params are stringified, but it should exclude
Rack::Test::UploadedFile:
https://github.com/rails/rails/pull/1203#issuecomment-1217081
>> 
>> Here is a small example:
>> 
>> let(:file) { mock(''UploadedFile'') }
>> 
>> it "tests something" do
>>   file.stub(:content_type).and_return ''text/plain''  
# this won''t work
>>   post :upload, { file: file }                                         
# params in controller will be "file" => "#[RSpec::Mock ...
]"
>> end
>> 
>> I get a NoMethodError: undefined method `content_type'' for
"#[RSpec::Mocks::Mock:0x3fe4723a81bc @name=\"file\"]":String
>> 
>> So, how can I test this?
>> 
>> Thanks,
>> David
>> 
>> _______________________________________________
>> rspec-users mailing list
>> rspec-users at rubyforge.org
>> http://rubyforge.org/mailman/listinfo/rspec-users
> 
> Rails has a built-in helper method for this:
>
http://api.rubyonrails.org/classes/ActionDispatch/TestProcess.html#method-i-fixture_file_upload
> 
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
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