tax_calc_example_spec.rb

describe TaxCalculator do

  context "low income bracket" do

    it "should be zero cents in the dollar for income less than 6000" do
      [-200, 0, 3000, 5999.99].each do |income_level|
        subject.income = income_level
        subject.should == 0
      end
    end

    it "should not be zero cents in the dollar for a 6000 income" do
      subject.income = 6000
      subject.should > 0
    end

  end

  context "15c income tax bracket" do

    it "should bill 15c in the dollar for income between 6000 and 37000" do
      [6000, 10000, 36999.99].each do |income_level|
        subject.income = income_level
        subject.should == (income_level * 0.15)
      end
    end

  end

  context "30c income tax bracket" do

    it "should bill 30c in the dollar for income between 37000 and 80000" do
      [37000, 50000, 79999.99].each do |income_level|
        subject.income = income_level
        subject.should == (income_level * 0.15)
      end
    end

  end

end