1 files changed, 15 insertions, 0 deletions
diff --git a/spec/lib/gitlab/metrics/dashboard/validator/custom_formats_spec.rb b/spec/lib/gitlab/metrics/dashboard/validator/custom_formats_spec.rb
new file mode 100644
index 00000000000..129fb631f3e
--- /dev/null
+++ b/spec/lib/gitlab/metrics/dashboard/validator/custom_formats_spec.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Metrics::Dashboard::Validator::CustomFormats do
+  describe '#format_handlers' do
+    describe 'add_to_metric_id_cache' do
+      it 'adds data to metric id cache' do
+        subject.format_handlers['add_to_metric_id_cache'].call('metric_id', '_schema')
+
+        expect(subject.metric_ids_cache).to eq(["metric_id"])
+      end
+    end
+  end
+end