Merge branch 'fj-avoid-incresaing-usage-ping-when-not-enabled' into 'master'

Avoid increasing redis counters when usage_ping is disabled

See merge request gitlab-org/gitlab-ce!30949

changelogs/unreleased/fj-avoid-incresaing-usage-ping-when-not-enabled.yml

+---
+title: Avoid increasing redis counters when usage_ping is disabled
+merge_request: 30949
+author:
+type: changed

lib/gitlab/usage_data_counters/redis_counter.rb

@@ -4,6 +4,8 @@ module Gitlab
   module UsageDataCounters
     module RedisCounter
       def increment(redis_counter_key)
+        return unless Gitlab::CurrentSettings.usage_ping_enabled
+
         Gitlab::Redis::SharedState.with { |redis| redis.incr(redis_counter_key) }
       end

spec/lib/gitlab/usage_data_counters/redis_counter_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::UsageDataCounters::RedisCounter, :clean_gitlab_redis_shared_state do
+  let(:redis_key) { 'foobar' }
+
+  subject { Class.new.extend(described_class) }
+
+  before do
+    stub_application_setting(usage_ping_enabled: setting_value)
+  end
+
+  context 'when usage_ping is disabled' do
+    let(:setting_value) { false }
+
+    it 'counter is not increased' do
+      expect do
+        subject.increment(redis_key)
+      end.not_to change { subject.total_count(redis_key) }
+    end
+  end
+
+  context 'when usage_ping is enabled' do
+    let(:setting_value) { true }
+
+    it 'counter is increased' do
+      expect do
+        subject.increment(redis_key)
+      end.to change { subject.total_count(redis_key) }.by(1)
+    end
+  end
+end