require 'rails_helper'
require 'numeric'

describe Numeric do

	describe '#floor_for_delta' do
		it 'rejects non integers' do
			expect { 2.floor_for_delta("test")}.to raise_error(ArgumentError)
			expect { 2.floor_for_delta(2.3)}.to raise_error(ArgumentError)
		end

		it 'rejects negative integers' do
			expect { 2.floor_for_delta(-1)}.to raise_error(ArgumentError)
		end

		it 'handles on -25' do
			expect(-25.floor_for_delta(25)).to eq -25
    end

		it 'handles on -24.5' do
			expect(-24.5.floor_for_delta(25)).to eq -25
		end

    it 'handles on -1' do
			expect(-1.floor_for_delta(25)).to eq -25
    end



    it 'handles on 0' do
			expect(0.floor_for_delta(25)).to eq 0
    end

		it 'handles on .5' do
			expect(0.5.floor_for_delta(25)).to eq 0
		end

    it 'handles on 1' do
			expect(1.floor_for_delta(25)).to eq 0
    end

    it 'handles on 25' do
			expect(25.floor_for_delta(25)).to eq 25
    end

		it 'handles on 25.5' do
			expect(25.5.floor_for_delta(25)).to eq 25
		end
  end

  describe '#ceil_for_delta' do
    it 'rejects non integers' do
      expect { 2.ceil_for_delta("test")}.to raise_error(ArgumentError)
			expect { 2.ceil_for_delta(2.3)}.to raise_error(ArgumentError)
    end

		it 'rejects negative integers' do
			expect { 2.ceil_for_delta(-1)}.to raise_error(ArgumentError)
    end

		it 'handles on -25.5' do
			expect(-25.5.ceil_for_delta(25)).to eq -25
		end

		it 'handles on -25' do
			expect(-25.ceil_for_delta(25)).to eq -25
		end


		it 'handles on -24.5' do
			expect(-24.5.ceil_for_delta(25)).to eq 0
		end

		it 'handles on -1' do
			expect(-1.ceil_for_delta(25)).to eq 0
		end

		it 'handles on 0' do
			expect(0.ceil_for_delta(25)).to eq 0
    end

		it 'handles on .5' do
			expect(0.5.ceil_for_delta(25)).to eq 25
		end

		it 'handles on 1' do
			expect(1.ceil_for_delta(25)).to eq 25
		end

		it 'handles on 25' do
			expect(25.ceil_for_delta(25)).to eq 25
    end

    it 'handles on 25.5' do
			expect(25.ceil_for_delta(25)).to eq 25
		end
  end

end