require 'spec_helper'
require 'rack'
require 'rack/test'

describe AuthenticationIdentifierTransposer::RackMiddleware do
  include Rack::Test::Methods

  before :each do
    @test_app = lambda do |env|
      request = Rack::Request.new env
      session = request.session
      test_app_response_data = {
        'message' => "tested",
        'session_user' => request.session['user'],
        'remote_user' => request.env['REMOTE_USER']
      }
      [200, {"Content-Type" => "application/json"}, test_app_response_data ]
    end
    @iut = AuthenticationIdentifierTransposer::RackMiddleware.new(@test_app)
  end

  context "when initialized" do
    it 'remembers the app provided' do
      expect(@iut.instance_variable_get("@app")).to eq(@test_app)
    end
  end

  context "when called with a request environment" do
    context 'with X-GATEWAY-AUTHENTICATED-IDENTIFIER header' do
      it "pass requests to the application" do
        opts = { 'X-GATEWAY-AUTHENTICATED-IDENTIFIER' => 'test_uuid' }
        code, env, body = @iut.call Rack::MockRequest.env_for('http://service', opts)
        expect([code, env, body['message']]).to eq([200, {"Content-Type"=>"application/json"}, "tested"])
      end

      it "set the user key in the request session" do
        opts = { 'X-GATEWAY-AUTHENTICATED-IDENTIFIER' => 'test_uuid' }
        code, env, body = @iut.call Rack::MockRequest.env_for('http://service', opts)
        expect(body['session_user']).to eq 'test_uuid'
      end

      it "set the remote user in the request environment" do
        opts = { 'X-GATEWAY-AUTHENTICATED-IDENTIFIER' => 'test_uuid' }
        code, env, body = @iut.call Rack::MockRequest.env_for('http://service', opts)
        expect(body['remote_user']).to eq 'test_uuid'
      end
    end

    context 'without X-GATEWAY-AUTHENTICATED-IDENTIFIER header' do
      it "pass requests to the application" do
        opts = { }
        code, env, body = @iut.call Rack::MockRequest.env_for('http://service', opts)
        expect([code, env, body['message'], body['session_user'], body['remote_user']]).to eq([200, {"Content-Type"=>"application/json"}, "tested", nil, nil])
      end

      it "does not modify the user key in the request session" do
        opts = { }
        code, env, body = @iut.call Rack::MockRequest.env_for('http://service', opts)
        expect(body['session_user']).to eq nil
      end

      it "does not modify the remote user in the request environment" do
        opts = { }
        code, env, body = @iut.call Rack::MockRequest.env_for('http://service', opts)
        expect(body['remote_user']).to eq nil
      end
    end
  end
end