discourse/spec/services/email_style_updater_spec.rb

# frozen_string_literal: true

RSpec.describe EmailStyleUpdater do
  fab!(:admin) { Fabricate(:admin) }
  let(:default_html) { File.read("#{Rails.root}/app/views/email/default_template.html") }
  let(:updater) { EmailStyleUpdater.new(admin) }

  def expect_settings_to_be_unset
    expect(SiteSetting.email_custom_template).to_not be_present
    expect(SiteSetting.email_custom_css).to_not be_present
    expect(SiteSetting.email_custom_css_compiled).to_not be_present
  end

  describe "update" do
    it "can change the settings" do
      expect(updater.update(html: "For you: %{email_content}", css: "h1 { color: blue; }")).to eq(
        true,
      )
      expect(SiteSetting.email_custom_template).to eq("For you: %{email_content}")
      expect(SiteSetting.email_custom_css).to eq("h1 { color: blue; }")
      expect(SiteSetting.email_custom_css_compiled.strip).to eq("h1{color:blue}")
    end

    it "will not store defaults" do
      updater.update(html: default_html, css: "")
      expect_settings_to_be_unset
    end

    it "can clear settings if defaults given" do
      SiteSetting.email_custom_template = "For you: %{email_content}"
      SiteSetting.email_custom_css = "h1 { color: blue; }"
      SiteSetting.email_custom_css_compiled = "h1{color:blue}"
      updater.update(html: default_html, css: "")
      expect_settings_to_be_unset
    end

    it "fails if html is missing email_content" do
      expect(updater.update(html: "No email content", css: "")).to eq(false)
      expect(updater.errors).to include(
        I18n.t("email_style.html_missing_placeholder", placeholder: "%{email_content}"),
      )
      expect_settings_to_be_unset
    end

    it "fails if css is not valid scss" do
      expect(updater.update(html: "For you: %{email_content}", css: "h1 { color: blue;")).to eq(
        false,
      )
      expect(updater.errors).to_not be_empty
      expect(updater.errors.first).to include("Invalid CSS after")
      expect_settings_to_be_unset
    end
  end
end