Spec the I18n helper on its own

spec/helpers/i18n_helper_spec.rb

@@ -0,0 +1,135 @@
+require 'spec_helper'
+
+describe I18nHelper do
+  let(:user) { create(:user) }
+
+  context "as guest" do
+    before do
+      allow(helper).to receive(:spree_current_user) { nil }
+    end
+
+    it "sets the default locale" do
+      helper.set_locale
+      expect(I18n.locale).to eq :en
+    end
+
+    it "sets the chosen locale" do
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+      expect(I18n.locale).to eq :es
+    end
+
+    it "remembers the chosen locale" do
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+
+      allow(helper).to receive(:params) { {} }
+      helper.set_locale
+      expect(I18n.locale).to eq :es
+    end
+
+    it "ignores unavailable locales" do
+      allow(helper).to receive(:params) { {locale: "xx"} }
+      helper.set_locale
+      expect(I18n.locale).to eq :en
+    end
+
+    it "remembers the last chosen locale" do
+      allow(helper).to receive(:params) { {locale: "en"} }
+      helper.set_locale
+
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+
+      allow(helper).to receive(:params) { {} }
+      helper.set_locale
+      expect(I18n.locale).to eq :es
+    end
+
+    it "remembers the chosen locale after logging in" do
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+
+      # log in
+      allow(helper).to receive(:spree_current_user) { user }
+      allow(helper).to receive(:params) { {} }
+      helper.set_locale
+      expect(I18n.locale).to eq :es
+    end
+
+    it "forgets the chosen locale without cookies" do
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+
+      # clean up cookies
+      cookies.delete :locale
+
+      allow(helper).to receive(:params) { {} }
+      helper.set_locale
+      expect(I18n.locale).to eq :en
+    end
+  end
+
+  context "logged in" do
+    before do
+      allow(helper).to receive(:spree_current_user) { user }
+    end
+
+    it "sets the default locale" do
+      helper.set_locale
+      expect(I18n.locale).to eq :en
+    end
+
+    it "sets the chosen locale" do
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+      expect(I18n.locale).to eq :es
+      expect(user.locale).to eq "es"
+    end
+
+    it "remembers the chosen locale" do
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+
+      allow(helper).to receive(:params) { {} }
+      helper.set_locale
+      expect(I18n.locale).to eq :es
+    end
+
+    it "remembers the last chosen locale" do
+      allow(helper).to receive(:params) { {locale: "en"} }
+      helper.set_locale
+
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+
+      allow(helper).to receive(:params) { {} }
+      helper.set_locale
+      expect(I18n.locale).to eq :es
+    end
+
+    it "remembers the chosen locale after logging out" do
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+
+      # log out
+      allow(helper).to receive(:spree_current_user) { nil }
+      allow(helper).to receive(:params) { {} }
+      helper.set_locale
+      expect(I18n.locale).to eq :es
+    end
+
+    it "remembers the chosen locale on another computer" do
+      allow(helper).to receive(:params) { {locale: "es"} }
+      helper.set_locale
+      expect(cookies[:locale]).to eq "es"
+
+      # switch computer / browser or loose cookies
+      cookies.delete :locale
+
+      allow(helper).to receive(:params) { {} }
+      helper.set_locale
+      expect(I18n.locale).to eq :es
+    end
+  end
+end