transaction_fee_calculation_spec.rb

require 'rspec'
require './transaction_fee_calculation'

describe 'calculation' do
  it "tax should be 0.1 for 5 Bitcoins" do
    expect(FeeCalculator.for(5)).to eq(0.1)
  end

  it "tax should be 0.2 for 10 Bitcoins" do
    expect(FeeCalculator.for(10)).to eq(0.2)
  end

  it "tax should be 0.3 for 20 Bitcoins" do
    expect(FeeCalculator.for(20)).to eq(0.3)
  end

  it "tax should be 0.65 for 60 Bitcoins" do
    expect(FeeCalculator.for(60)).to eq(0.65)
  end
end