1 files changed, 35 insertions, 0 deletions
diff --git a/spec/support/shared_examples/views/themed_layout_examples.rb b/spec/support/shared_examples/views/themed_layout_examples.rb
new file mode 100644
index 00000000000..b6c53dce4cb
--- /dev/null
+++ b/spec/support/shared_examples/views/themed_layout_examples.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+RSpec.shared_examples "a layout which reflects the application theme setting", :themed_layout do
+  context 'as a themed layout' do
+    let(:default_theme_class) { ::Gitlab::Themes.default.css_class }
+
+    context 'when no theme is explicitly selected' do
+      it 'renders with the default theme' do
+        render
+
+        expect(rendered).to have_selector("body.#{default_theme_class}")
+      end
+    end
+
+    context 'when user is authenticated & has selected a specific theme' do
+      before do
+        allow(view).to receive(:user_application_theme).and_return(chosen_theme.css_class)
+      end
+
+      where(chosen_theme: ::Gitlab::Themes.available_themes)
+
+      with_them do
+        it "renders with the #{params[:chosen_theme].name} theme" do
+          render
+
+          if chosen_theme.css_class != default_theme_class
+            expect(rendered).not_to have_selector("body.#{default_theme_class}")
+          end
+
+          expect(rendered).to have_selector("body.#{chosen_theme.css_class}")
+        end
+      end
+    end
+  end
+end