1 files changed, 23 insertions, 0 deletions
diff --git a/spec/lib/gitlab/graphql/calls_gitaly/instrumentation_spec.rb b/spec/lib/gitlab/graphql/calls_gitaly/instrumentation_spec.rb
new file mode 100644
index 00000000000..d93ce464a92
--- /dev/null
+++ b/spec/lib/gitlab/graphql/calls_gitaly/instrumentation_spec.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+describe Gitlab::Graphql::CallsGitaly::Instrumentation do
+  subject { described_class.new }
+
+  describe '#calls_gitaly_check' do
+    let(:gitaly_field) { Types::BaseField.new(name: 'test', type: GraphQL::STRING_TYPE, null: true, calls_gitaly: true) }
+    let(:no_gitaly_field) { Types::BaseField.new(name: 'test', type: GraphQL::STRING_TYPE, null: true, calls_gitaly: false) }
+
+    context 'if there are no Gitaly calls' do
+      it 'does not raise an error if calls_gitaly is false' do
+        expect { subject.send(:calls_gitaly_check, no_gitaly_field, 0) }.not_to raise_error
+      end
+    end
+
+    context 'if there is at least 1 Gitaly call' do
+      it 'raises an error if calls_gitaly: is false or not defined' do
+        expect { subject.send(:calls_gitaly_check, no_gitaly_field, 1) }.to raise_error(/specify a constant complexity or add `calls_gitaly: true`/)
+      end
+    end
+  end
+end