# frozen_string_literal: true

require "spec_helper"

require "xlsx_columns"

RSpec.describe XlsxColumns do
  describe "#column" do
    context "when position below 26" do
      it "returns the corresponding letter" do
        expect(described_class.column(3)).to eql("C")
        expect(described_class.column(26)).to eql("Z")
      end
    end

    context "when position is above 26" do
      it "returns a combination of letters" do
        expect(described_class.column(27)).to eql("AA")
        expect(described_class.column(56)).to eql("BD")
        expect(described_class.column(456)).to eql("QN")
        expect(described_class.column(676)).to eql("ZZ")
      end
    end
  end
end