undefined method `normalize_params' for Rack::Utils:Module

If you have installed capybara 2.6.0 or the latest version and RSpec 3.x the configuration has changed leading to the above error.

After installing capybara and RSpec , the spec folder generates two new files "spec_helper.rb" and "rails_helper.rb".

Generators run in RSpec 3.x will require rails_helper and not spec_helper.

So , we need to configure and include the "rails_helper.rb" in the project folder rather than the "spec_helper".

The configuration for "rails_helper.rb" is the same as the "spec_helper.rb".

If you want to Upgrading from rspec-rails-2.x to rspec-rails-3 , please refer the documentation below: https://www.relishapp.com/rspec/rspec-rails/docs/upgrade#file-type-inference-disabled

Brent and Manoj, I was able to solve the issue by simply editing the Gemfile with the following:

1. Follow the Rspec upgrade instructions that Manoj linked to above.
2. Change the following in the Gemfile located in the root of your app.

Find in the Gemfile:

group :development, :test do
  gem 'rspec-rails', '~> ?.?'
end

and update the version numbers to your rspec-rails version, which is 3.5 for me, but should be at least 3 (Check in console with 'gem list' command)

Find:

group :test do
    gem 'capybara', '~> ?.?.?'
end

and do the same (2.7.1 for me).

Note: I am still getting "undefined method `stub_model'" errors when running a full rake spec but will post separately.

Thanks Manoj.

Hi, I'm having the same issue as Brent and have not successfully solved it. I've followed the instructions on this video series to the letter and consistently have the "normalize_params" error (always point to some form of click_button, click_link, etc.)

Versions: -Rails: 5.0.0 -Rake: 11.2.2, 10.4.2 -Capybara: 2.7.1, 2.1.0 -Rspec: 3.5.0, 3.1.0, 2.99.0 -Ruby: 2.2.4p230 (2015-12-16 revision 53155)

-I've tried all alternate syntax from here: https://gist.github.com/zhengjia/428105 -Read this discussion but the "solution" seems to be to simply upgrade Capybara: https://github.com/jnicklas/capybara/issues/1592. -I tried following Manoj's advice. There was no rails_helper.rb file, so I did a simple Save As of spec_helper.rb. This did not solve the problem.

As a side note, I also get deprecation warnings that I've attempted unsuccessfully to locate and address: -DEPRECATION WARNING: alias_method_chain is deprecated. Please, use Module#prepend instead -RSpec::Core::ExampleGroup#example is deprecated and will be removed in RSpec 3.

Help much appreciated!

So the issue is resolved as of now right

Thanks Manoj—you beat me to that response. This measure successfully eliminated all but one of my test failures.

I have one last failing test when running rake spec:

  Failure/Error: if @todo_list.update(todo_list_params)

       #<TodoList id: 1, title: "MyString", description: "My Description", created_at: "2016-08-08 15:55:30", updated_at: "2016-08-08 15:55:30"> received :update with unexpected arguments
         expected: ({"title"=>"MyString"})
              got: (<ActionController::Parameters {"title"=>"MyString"} permitted: true>)
       Diff:
       @@ -1,2 +1,2 @@
       -[{"title"=>"MyString"}]
       +[<ActionController::Parameters {"title"=>"MyString"} permitted: true>]

Thanks.