```ruby
# encoding: UTF-8
require_relative 'spec_helper'

describe "Grokily" do

  it "redirects to Github on root" do
    get '/'
    last_response.should be_redirect
    follow_redirect!
    last_request.url.should == "https://github.com/benjaminasmith/grokily"
  end

  it "exposes a list of languages on request" do
    get '/languages'
    last_response.should be_ok
    last_response.header['Content-Type'].should include 'application/json'
    JSON.parse(last_response.body).has_key "languages"
  end

  it "exposes a list of Norwegian verbs on request" do
    get '/norsk/verbs'
    last_response.should be_ok
    last_response.header['Content-Type'].should include 'application/json'
    JSON.parse(last_response.body).has_key "regular_verbs"
    JSON.parse(last_response.body).has_key "irregular_verbs"
  end

end
```

Add tests for verb and languages lists in both plaintext and json format (on request, defaulting to plaintext).
user
```ruby
# encoding: UTF-8
require_relative 'spec_helper'

describe "Grokily" do

  it "redirects to Github on root" do
    get '/'
    last_response.should be_redirect
    follow_redirect!
    last_request.url.should == "https://github.com/benjaminasmith/grokily"
  end

  context "exposes a list of languages on request" do
    it "in plaintext" do
      get '/languages'
      last_response.should be_ok
      last_response.body.include? "languages:"
    end
    it "in json" do
      get '/languages.json'
      last_response.should be_ok
      last_response.header['Content-Type'].should include 'application/json'
      JSON.parse(last_response.body).has_key? "languages"
    end
  end

  context "exposes a list of Norwegian verbs on request" do
    it "in plaintext" do
      get '/norsk/verbs'
      last_response.should be_ok
      last_response.body.include? "regular verbs:"
    end
    it "in json" do
      get '/norsk/verbs.json'
      last_response.should be_ok
      last_response.header['Content-Type'].should include 'application/json'
      JSON.parse(last_response.body).has_key? "regular_verbs"
      JSON.parse(last_response.body).has_key?"irregular_verbs"
    end
  end

end
```
assistant