mastodon/spec/helpers/theme_helper_spec.rb

# frozen_string_literal: true

require 'rails_helper'

RSpec.describe ThemeHelper do
  describe 'theme_style_tags' do
    let(:result) { helper.theme_style_tags(theme) }

    context 'when using system theme' do
      let(:theme) { 'system' }

      it 'returns the mastodon-light and default stylesheets with correct color schemes' do
        expect(html_links.first.attributes.symbolize_keys)
          .to include(
            href: have_attributes(value: match(/mastodon-light/)),
            media: have_attributes(value: 'not all and (prefers-color-scheme: dark)')
          )
        expect(html_links.last.attributes.symbolize_keys)
          .to include(
            href: have_attributes(value: match(/default/)),
            media: have_attributes(value: '(prefers-color-scheme: dark)')
          )
      end
    end

    context 'when using other theme' do
      let(:theme) { 'contrast' }

      it 'returns the theme stylesheet without color scheme information' do
        expect(html_links.first.attributes.symbolize_keys)
          .to include(
            href: have_attributes(value: match(/contrast/)),
            media: have_attributes(value: 'all')
          )
      end
    end
  end

  describe 'theme_color_tags' do
    let(:result) { helper.theme_color_tags(theme) }

    context 'when using system theme' do
      let(:theme) { 'system' }

      it 'returns the mastodon-light and default stylesheets with correct color schemes' do
        expect(html_theme_colors.first.attributes.symbolize_keys)
          .to include(
            content: have_attributes(value: Themes::THEME_COLORS[:dark]),
            media: have_attributes(value: '(prefers-color-scheme: dark)')
          )
        expect(html_theme_colors.last.attributes.symbolize_keys)
          .to include(
            content: have_attributes(value: Themes::THEME_COLORS[:light]),
            media: have_attributes(value: '(prefers-color-scheme: light)')
          )
      end
    end

    context 'when using mastodon-light theme' do
      let(:theme) { 'mastodon-light' }

      it 'returns the theme stylesheet without color scheme information' do
        expect(html_theme_colors.first.attributes.symbolize_keys)
          .to include(
            content: have_attributes(value: Themes::THEME_COLORS[:light])
          )
      end
    end

    context 'when using other theme' do
      let(:theme) { 'contrast' }

      it 'returns the theme stylesheet without color scheme information' do
        expect(html_theme_colors.first.attributes.symbolize_keys)
          .to include(
            content: have_attributes(value: Themes::THEME_COLORS[:dark])
          )
      end
    end
  end

  private

  def html_links
    Nokogiri::HTML5.fragment(result).css('link')
  end

  def html_theme_colors
    Nokogiri::HTML5.fragment(result).css('meta[name=theme-color]')
  end
end