require 'spec_helper'

describe Grape::Middleware::Versioner::Param do

  let(:app) { lambda { |env| [200, env, env['api.version']] } }
  subject { Grape::Middleware::Versioner::Param.new(app, @options || {}) }

  it 'sets the API version based on the default param (apiver)' do
    env = Rack::MockRequest.env_for("/awesome", params: { "apiver" => "v1" })
    subject.call(env)[1]["api.version"].should == 'v1'
  end

  it 'cuts (only) the version out of the params', focus: true do
    env = Rack::MockRequest.env_for("/awesome", params: { "apiver" => "v1", "other_param" => "5" })
    env['rack.request.query_hash'] = Rack::Utils.parse_nested_query(env['QUERY_STRING'])
    subject.call(env)[1]['rack.request.query_hash']["apiver"].should be_nil
    subject.call(env)[1]['rack.request.query_hash']["other_param"].should == "5"
  end

  it 'provides a nil version if no version is given' do
    env = Rack::MockRequest.env_for("/")
    subject.call(env).last.should be_nil
  end

  context 'with specified parameter name' do
    before { @options = { parameter: 'v' } }
    it 'sets the API version based on the custom parameter name' do
      env = Rack::MockRequest.env_for("/awesome", params: { "v" => "v1" })
      subject.call(env)[1]["api.version"].should == "v1"
    end
    it 'does not set the API version based on the default param' do
      env = Rack::MockRequest.env_for("/awesome", params: { "apiver" => "v1" })
      subject.call(env)[1]["api.version"].should be_nil
    end
  end

  context 'with specified versions' do
    before { @options = { versions: ['v1', 'v2'] } }
    it 'throws an error if a non-allowed version is specified' do
      env = Rack::MockRequest.env_for("/awesome", params: { "apiver" => "v3" })
      catch(:error) { subject.call(env) }[:status].should == 404
    end
    it 'allows versions that have been specified' do
      env = Rack::MockRequest.env_for("/awesome", params: { "apiver" => "v1" })
      subject.call(env)[1]["api.version"].should == 'v1'
    end
  end

  it 'returns a 200 when no version is set (matches the first version found)' do
    @options = {
      versions: ['v1'],
      version_options: { using: :header }
    }
    env = Rack::MockRequest.env_for("/awesome", params: {})
    subject.call(env).first.should == 200
  end

end