Specs for date range splitter

date_range_splitter_spec.rb

require "rails_helper"

RSpec.describe DateRangeSplitter, type: :service do
  describe "#generate_split_dates" do
    it "#splits dates properly exclusive in ranges" do
      from = DateTime.now
      to = from + 53.days
      splitter = DateRangeSplitter.new(from, to, 10, end_inclusive: false)
      splitter.each do |from_d, to_d|
        check_against = to_d == to ? 3 : 10
        expect((to_d - from_d).to_i).to eql(check_against)
      end
    end

    it "#splits dates properly inclusive in ranges" do
      from = DateTime.now
      to = from + 53.days
      splitter = DateRangeSplitter.new(from, to, 10, end_inclusive: true)
      splitter.each do |from_d, to_d|
        check_against = to_d == to ? 3 : 9
        expect((to_d - from_d).to_i).to eql(check_against)
      end
    end
  end
end