Bugfix: Always use the default language when generating emails.32748-emails-are-being-sent-with-the-wrong-language

There was a race condition issue when the application was generating an
email and was using a language that was previously being used in other
request.

2 files changed, 25 insertions, 16 deletions

diff --git a/spec/lib/gitlab/i18n_spec.rb b/spec/lib/gitlab/i18n_spec.rb
index 52f2614d5ca..a3dbeaa3753 100644
--- a/spec/lib/gitlab/i18n_spec.rb
+++ b/spec/lib/gitlab/i18n_spec.rb
@@ -1,27 +1,27 @@
 require 'spec_helper'
 
-module Gitlab
-  describe I18n, lib: true do
-    let(:user) { create(:user, preferred_language: 'es') }
+describe Gitlab::I18n, lib: true do
+  let(:user) { create(:user, preferred_language: 'es') }
 
-    describe '.set_locale' do
-      it 'sets the locale based on current user preferred language' do
-        Gitlab::I18n.set_locale(user)
+  describe '.locale=' do
+    after { described_class.use_default_locale }
 
-        expect(FastGettext.locale).to eq('es')
-        expect(::I18n.locale).to eq(:es)
-      end
+    it 'sets the locale based on current user preferred language' do
+      described_class.locale = user.preferred_language
+
+      expect(FastGettext.locale).to eq('es')
+      expect(::I18n.locale).to eq(:es)
     end
+  end
 
-    describe '.reset_locale' do
-      it 'resets the locale to the default language' do
-        Gitlab::I18n.set_locale(user)
+  describe '.use_default_locale' do
+    it 'resets the locale to the default language' do
+      described_class.locale = user.preferred_language
 
-        Gitlab::I18n.reset_locale
+      described_class.use_default_locale
 
-        expect(FastGettext.locale).to eq('en')
-        expect(::I18n.locale).to eq(:en)
-      end
+      expect(FastGettext.locale).to eq('en')
+      expect(::I18n.locale).to eq(:en)
     end
   end
 end
diff --git a/spec/mailers/notify_spec.rb b/spec/mailers/notify_spec.rb
index 1e6260270fe..ec6f6c42eac 100644
--- a/spec/mailers/notify_spec.rb
+++ b/spec/mailers/notify_spec.rb
@@ -128,6 +128,15 @@ describe Notify do
               is_expected.to have_body_text(namespace_project_issue_path(project.namespace, project, issue))
             end
           end
+
+          context 'with a preferred language' do
+            before { Gitlab::I18n.locale = :es }
+            after { Gitlab::I18n.use_default_locale }
+
+            it 'always generates the email using the default language' do
+              is_expected.to have_body_text('foo, bar, and baz')
+            end
+          end
         end
 
         describe 'status changed' do