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 'should set 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 'should cut (only) the version out of the params', :focus => true do
    env = Rack::MockRequest.env_for("/awesome", {:params => {"apiver" => "v1", "other_param" => "5"}})
    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 'should provide 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 'should set the API version based on the custom parameter name' do
      env = Rack::MockRequest.env_for("/awesome", {:params => {"v" => "v1"}})
      s = subject.call(env)[1]["api.version"] == "v1"
    end
    it 'should not set the API version based on the default param' do
      env = Rack::MockRequest.env_for("/awesome", {:params => {"apiver" => "v1"}})
      s = subject.call(env)[1]["api.version"] == nil
    end
  end

  context 'with specified versions' do
    before{ @options = {:versions => ['v1', 'v2']}}
    it 'should throw 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 'should allow 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 'should return 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