1 files changed, 24 insertions, 0 deletions
diff --git a/spec/lib/gitlab/utils/username_and_email_generator_spec.rb b/spec/lib/gitlab/utils/username_and_email_generator_spec.rb
new file mode 100644
index 00000000000..45df8f08055
--- /dev/null
+++ b/spec/lib/gitlab/utils/username_and_email_generator_spec.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Utils::UsernameAndEmailGenerator, feature_category: :system_access do
+  let(:username_prefix) { 'username_prefix' }
+  let(:email_domain) { 'example.com' }
+
+  subject { described_class.new(username_prefix: username_prefix, email_domain: email_domain) }
+
+  describe 'email domain' do
+    it 'defaults to `Gitlab.config.gitlab.host`' do
+      expect(described_class.new(username_prefix: username_prefix).email).to end_with("@#{Gitlab.config.gitlab.host}")
+    end
+
+    context 'when specified' do
+      it 'uses the specified email domain' do
+        expect(subject.email).to end_with("@#{email_domain}")
+      end
+    end
+  end
+
+  include_examples 'username and email pair is generated by Gitlab::Utils::UsernameAndEmailGenerator'
+end