Format scope seems to have changed in 0.10.0

[dblock]

See dblock/grape-on-rails@7b6ebee, I had to move format :json to the top level API to get the formatter in something that was mounted.

[dblock]

require 'spec_helper'

describe Grape::API do
  subject do
    api = Class.new(Grape::API) do
      format :json
      resource :table do
        get do
          { ping: 'pong' }
        end
      end
    end

    Class.new(Grape::API) do
      mount api
    end
  end

  def app
    subject
  end

  it 'applies format in the mounted class' do
    get '/table'
    expect(last_response.body).to eq({ ping: 'pong' }.to_json)
  end
end

[dblock]

Fixed in 0c0e85f.