Replace date string with Date object

Author: jyeharry

spec/system/mileage_rates/mileage_rates_spec.rb

@@ -13,7 +13,7 @@
   it "add new mileage rate" do
     click_on "New Mileage Rate"
     expect(page).to have_text("New Mileage Rate")
-    fill_in "Effective date", with: "01/02/2020"
+    fill_in "Effective date", with: Date.new(2020, 1, 2)
     fill_in "Amount", with: 1.35
     uncheck "Currently active?"
     click_on "Save Mileage Rate"