NoMethodError: undefined method `join' for #<String:0x007f62c3e6fb90>

gistfile1.rb

Stacktrace:

  26) UserAPI /post user with no parameters with no json 
     Failure/Error: before { post '/user' }
     NoMethodError:
       undefined method `join' for #<String:0x007f62c3e6fb90>
     # ./spec/routes/user_api_spec.rb:7:in `block (5 levels) in <top (required)>'



Gemfile:

source 'http://rubygems.org'

ruby '2.1.3'

gem 'sinatra', '1.4.5', :require => 'sinatra/base'
gem 'tilt', '1.3.4'
gem 'mongoid'
gem 'bson_ext'
gem 'temple', '0.4.1'
gem 'slim', '1.3.0'

gem 'rspec'
gem 'rack-test'

gem 'simplecov'

gem 'database_cleaner'
gem 'json_spec'

gem 'thin'

gem 'json'



The user_spec_api.rb

describe 'UserAPI' do
  include Rack::Test::Methods

  describe '/post user' do
    context 'with no parameters' do
      context 'with no json' do
        before { post '/user' }
        it { expect(last_response.status).to be 500 }
        it { expect(last_response.errors).to include('ArgumentError') }
        it { expect(last_response.errors).to include('We need an email to process your request.') }
      end
    end

    context 'with a valid email' do
      before { post '/user?email=foo@bar.com' }
      it { expect(last_response.status).to be 200 }
      it { expect(User.count).to be 1}
      it { expect(User.last.email).to eq 'foo@bar.com'}
    end
  end
end



The user_api.rb

module Sinatra
  module EasyBar
    module UserAPI

      def self.registered(app)

        app.post '/user' do
          raise(ArgumentError, 'We need an email to process your request.') if params['email'].blank?
          User.create! email: params['email']
        end

      end
    end
  end
end

The answer

sinatra/sinatra@b39d72d

A more structured discussion

sinatra/sinatra#951