withdrawals_controller.rb

  def new
    @transaction_fee = current_company.transaction_fee
    @transaction_cost = current_company.transaction_cost

    @withdrawal = current_company.withdrawals.new
    @available_amount = Withdrawal.available_amount(current_company.id)
    @transactions = current_company.transactions.where("payment_status = 'ready_to_pay'")
  end

withdrawals_controller_spec.rb

  describe 'GET #new' do

    let!(:transaction) { FactoryGirl.create(:authorized_transaction_ready_to_pay, company: @user.company) }
    let(:withdrawal) { FactoryGirl.create(:withdrawal, company: @user.company, created_by: @user.id) }

    before { get :show, {id: withdrawal.id} }

    subject(:assigns) { assigns }

    # Have to use string keys because of legacy issues, I believe

    its("transaction_fee")  { should eq 3.59 }
    its("transaction_cost") { should eq 0.29 }
    its("withdrawal")       { should eq withdrawal }
    its("available_amount") { should eq 96.12 }
    its("transactions")     { should match_array([transaction]) }
  end