1 files changed, 40 insertions, 0 deletions
diff --git a/spec/lib/gitlab/usage/metrics/instrumentations/total_count_metric_spec.rb b/spec/lib/gitlab/usage/metrics/instrumentations/total_count_metric_spec.rb
new file mode 100644
index 00000000000..f3aa1ba4f88
--- /dev/null
+++ b/spec/lib/gitlab/usage/metrics/instrumentations/total_count_metric_spec.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Usage::Metrics::Instrumentations::TotalCountMetric, :clean_gitlab_redis_shared_state,
+  feature_category: :product_analytics_data_management do
+  before do
+    allow(Gitlab::InternalEvents::EventDefinitions).to receive(:known_event?).and_return(true)
+  end
+
+  context 'with multiple similar events' do
+    let(:expected_value) { 10 }
+
+    before do
+      10.times do
+        Gitlab::InternalEvents.track_event('my_event')
+      end
+    end
+
+    it_behaves_like 'a correct instrumented metric value', { time_frame: 'all', events: [{ name: 'my_event' }] }
+  end
+
+  context 'with multiple different events' do
+    let(:expected_value) { 2 }
+
+    before do
+      Gitlab::InternalEvents.track_event('my_event1')
+      Gitlab::InternalEvents.track_event('my_event2')
+    end
+
+    it_behaves_like 'a correct instrumented metric value',
+      { time_frame: 'all', events: [{ name: 'my_event1' }, { name: 'my_event2' }] }
+  end
+
+  describe '.redis_key' do
+    it 'adds the key prefix to the event name' do
+      expect(described_class.redis_key('my_event')).to eq('{event_counters}_my_event')
+    end
+  end
+end