require 'rails_helper'
require 'i18n/tasks'

describe 'I18n' do
  let(:i18n) { I18n::Tasks::BaseTask.new }
  let(:missing_keys) { i18n.missing_keys }
  let(:unused_keys) { i18n.unused_keys }

  it 'does not have missing keys' do
    expect(missing_keys).to be_empty,
      "Missing #{missing_keys.leaves.count} i18n keys, run `i18n-tasks missing' to show them"
  end

  it 'does not have unused keys' do
    expect(unused_keys).to be_empty,
      "#{unused_keys.leaves.count} unused i18n keys, run `i18n-tasks unused' to show them"
  end

  context "Plurals" do

    after do
      I18n.backend.reload!
    end

    it "returns plural rule if translation present" do
      keys = { zero:  "No comments",
               one:   "1 comment",
               other: "%{count} comments" }

      I18n.backend.store_translations(:en, { test_plural: keys })

      expect(I18n.t("test_plural", count: 0)).to eq("No comments")
      expect(I18n.t("test_plural", count: 1)).to eq("1 comment")
      expect(I18n.t("test_plural", count: 2)).to eq("2 comments")
    end

    it "returns default locale's plural rule if whole translation not present" do
      keys = { zero:  "No comments",
               one:   "1 comment",
               other: "%{count} comments" }

      I18n.backend.store_translations(I18n.default_locale, { test_plural: keys })
      I18n.backend.store_translations(:zz, {} )

      I18n.enforce_available_locales = false
      I18n.locale = :zz
      I18n.fallbacks[:zz] << I18n.default_locale

      expect(I18n.t("test_plural", count: 0)).to eq("No comments")
      expect(I18n.t("test_plural", count: 1)).to eq("1 comment")
      expect(I18n.t("test_plural", count: 2)).to eq("2 comments")
    end

    it "returns count if specific plural rule not present" do
      keys = { zero:  "No comments" }
      I18n.backend.store_translations(:en, { test_plural: keys })

      expect(I18n.t("test_plural", count: 0)).to eq("No comments")
      expect(I18n.t("test_plural", count: 1)).to eq(1)
      expect(I18n.t("test_plural", count: 2)).to eq(2)
    end

  end
end