Show "Sign in" instead of "Sign in / Register" when sign up is disabled

app/views/layouts/header/_default.html.haml

@@ -61,7 +61,9 @@
           - if header_link?(:sign_in)
             %li.nav-item
               %div
-                = link_to "Sign in / Register", new_session_path(:user, redirect_to_referer: 'yes'), class: 'btn btn-sign-in'
+                - sign_in_text = allow_signup? ? 'Sign in / Register' : 'Sign in'
+                = link_to sign_in_text, new_session_path(:user, redirect_to_referer: 'yes'), class: 'btn btn-sign-in'
+
 
       %button.navbar-toggler.d-block.d-sm-none{ type: 'button' }
         %span.sr-only Toggle navigation

spec/features/users/show_spec.rb

@@ -14,4 +14,28 @@ describe 'User page' do
       expect(page).to have_link('Snippets')
     end
   end
+
+  context 'signup disabled' do
+    it 'shows the sign in link' do
+      stub_application_setting(signup_enabled: false)
+
+      visit(user_path(user))
+
+      page.within '.navbar-nav' do
+        expect(page).to have_link('Sign in')
+      end
+    end
+  end
+
+  context 'signup enabled' do
+    it 'shows the sign in and register link' do
+      stub_application_setting(signup_enabled: true)
+
+      visit(user_path(user))
+
+      page.within '.navbar-nav' do
+        expect(page).to have_link('Sign in / Register')
+      end
+    end
+  end
 end