1 files changed, 47 insertions, 0 deletions
diff --git a/spec/support/shared_examples/requests/api/graphql/read_only_instance_shared_examples.rb b/spec/support/shared_examples/requests/api/graphql/read_only_instance_shared_examples.rb
new file mode 100644
index 00000000000..be163d6aa0e
--- /dev/null
+++ b/spec/support/shared_examples/requests/api/graphql/read_only_instance_shared_examples.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+RSpec.shared_examples 'graphql on a read-only GitLab instance' do
+  include GraphqlHelpers
+
+  context 'mutations' do
+    let(:current_user) { note.author }
+    let!(:note) { create(:note) }
+
+    let(:mutation) do
+      variables = {
+        id: GitlabSchema.id_from_object(note).to_s
+      }
+
+      graphql_mutation(:destroy_note, variables)
+    end
+
+    it 'disallows the query' do
+      post_graphql_mutation(mutation, current_user: current_user)
+
+      expect(json_response['errors'].first['message']).to eq(Mutations::BaseMutation::ERROR_MESSAGE)
+    end
+
+    it 'does not destroy the Note' do
+      expect do
+        post_graphql_mutation(mutation, current_user: current_user)
+      end.not_to change { Note.count }
+    end
+  end
+
+  context 'read-only queries' do
+    let(:current_user) { create(:user) }
+    let(:project) { create(:project, :repository) }
+
+    before do
+      project.add_developer(current_user)
+    end
+
+    it 'allows the query' do
+      query = graphql_query_for('project', 'fullPath' => project.full_path)
+
+      post_graphql(query, current_user: current_user)
+
+      expect(graphql_data['project']).not_to be_nil
+    end
+  end
+end