require "rails_helper"

describe ArticlesHelper do
  describe ".get_host_without_www" do
    it "drops the www off of a valid url" do
      host = helper.get_host_without_www("https://www.example.com")
      expect(host).to eq "example.com"
    end

    it "lowercases the host name in general" do
      host = helper.get_host_without_www("https://www.EXAMPLE.COM")
      expect(host).to eq "example.com"
    end

    it "titlecases the host for medium.com and drops .com" do
      host = helper.get_host_without_www("https://www.medium.com")
      expect(host).to eq "Medium"
    end

    it "can handle urls without schemes" do
      host = helper.get_host_without_www("www.example.com")
      expect(host).to eq "example.com"
    end
  end

  describe "#image_tag_or_inline_svg_tag" do
    helper do
      def internal_navigation?
        true
      end
    end
    subject { helper.image_tag_or_inline_svg_tag("twitter") }

    it { is_expected.to start_with("<img") }

    context "with a width and height" do
      subject { helper.image_tag_or_inline_svg_tag("twitter", width: 18, height: 18) }

      it { is_expected.to include('width="18" height="18"') }
    end

    context "with #internal_navigation? set to false" do
      before { allow(helper).to receive(:internal_navigation?).and_return(false) }

      it { is_expected.to start_with('<svg xmlns="http://www.w3.org/2000/svg"') }
    end

    context "with width and height arguments, and with #internal_navigation? set to false" do
      subject { helper.image_tag_or_inline_svg_tag("twitter", width: 18, height: 18) }

      before { allow(helper).to receive(:internal_navigation?).and_return(false) }

      it { is_expected.to include('height="18" width="18"') }
    end
  end

  describe "#utc_iso_timestamp" do
    it "correctly formats the date when present" do
      expect(helper.utc_iso_timestamp(Time.current)).
        to match(/\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z/)
    end

    it "returns nil if there is no timestamp" do
      expect(helper.utc_iso_timestamp(nil)).to be nil
    end
  end
end
