require "./savings_required_calculator.rb"

describe SavingsRequiredCalculator do

  let(:input) {
    {
      :first_name_1 => "Robert",
      :first_name_2 => "Ana",
      :last_name => "Harwood",
      :age_1 => 50,
      :age_2 => 41,
      :retirement_age_1 => 62,
      :retirement_age_2 => 53,
      :years_to_retirement => 12,
      :target_retirement_income => 20000.00,
      :combined_social_security => 4000.00,
      :combined_pensions => 3500.00,
      :other_income => 0.00,
      :average_inflation_rate => 3.10,
      :average_rate_of_return => 5.00,
      :current_portfolio => 2400000.00
    }
  }

  it "raises error if all paramaters were not specified" do
    expect {SavingsRequiredCalculator.new({}) }.to raise_error("Invalid Input")
  end

  it "successfully initializes if all arguments supplied" do
    expect(SavingsRequiredCalculator.new(input).class).to eq(SavingsRequiredCalculator)
  end

  it "calculates the Annual Savings to Retire at expected Year" do
    expect(SavingsRequiredCalculator.new(input).annual_savings_to_retire).to eq(204736.84)
  end

  it "calculates the shortfall / excess" do
    expect(SavingsRequiredCalculator.new(input).shortfall).to eq(-3896842.11)
  end

  it "calculates the shortfall / excess" do
    expect(SavingsRequiredCalculator.new(input).summary).to eq("You are planning to retire in approximately 12 years and your current savings are approximately
$2,400,000.00\nThe monthly income we are targeting for retirement is $20,000.00 in todays dollars.  After adjusting for a 3.1% inflation rate we calculate that your will need approximately $27,440.00 per month.\n\nWe recommend a portfolio size of $6,296,842.11 to support your income needs. You will need to save an average of $204,736.84
for the next 12 years")
  end

end