Allow users to select a child benefit stop date in years up to 2013

README.md

@@ -4,6 +4,15 @@ Calculators
 This is an application to contain custom-built calculators.  These will initially replace some smart-answers that have
 outgrown the framework.
 
+## Child benefit tax calculator
+Currently the only calculator in this application is the Child benefit tax calculator.
+
+This calculator reports how much child benefit tax you are entitled during a tax year.
+
+There is a cut-off date of 7 January 2013. This is the date [High Income Child Benefit Tax Charge](https://www.gov.uk/child-benefit-tax-charge/overview) came in effect.  
+This means that if the 2012 tax year is selected the calculator will only calculate the child benefit you are entitled to from 7 Jan 2013 to 5 Apr 2013, not for the entire tax year.
+
+
 ## Running the app
 
 ```

app/views/child_benefit_tax/_starting_child.html.erb

@@ -15,5 +15,5 @@
   <% end %>
   <%= select_date (child ? child.end_date : nil), :prefix => "starting_children[#{index}][stop]",
     :prompt => {:day => "Day", :month => "Month", :year => "Year" }, :order => [:day, :month, :year],
-    :start_year => 2.years.ago(Date.today).year, :end_year => 10.years.since(Date.today).year %>
+    :start_year => 3.years.ago(Date.today).year, :end_year => 10.years.since(Date.today).year %>
 </div>

spec/features/child_benefit_tax_calculator_spec.rb

@@ -85,6 +85,15 @@
     )
   end
 
+  it "should allow stop date to be three years in the past" do
+    Timecop.freeze('2014-04-04')
+    visit "/child-benefit-tax-calculator"
+    click_on "Start now"
+
+    expected_year_list = ("2011".."2024").to_a
+    expect(page).to have_select("starting_children_0_stop_year", options: expected_year_list.unshift("Year"))
+  end
+
   it "should show error if no children are present in the selected tax year" do
     Timecop.travel "2014-09-01"
     visit "/child-benefit-tax-calculator"