Adds User Cap instrumentation

ee/config/metrics/settings/20211005184521_user_cap_feature_enabled.yml

+---
+key_path: user_cap_feature_enabled
+description: Whether User Cap feature is enabled
+product_section: fulfillment
+product_stage: fulfillment
+product_group: group::utilization
+product_category: utilization
+value_type: number
+status: active
+milestone: "14.4"
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/71786
+instrumentation_class: UserCapSettingEnabledMetric
+time_frame: none
+data_source: database
+data_category: optional
+distribution:
+- ee
+tier:
+- premium
+- ultimate

ee/lib/ee/gitlab/usage_data.rb

@@ -73,7 +73,8 @@ module EE
           {
             elasticsearch_enabled: alt_usage_data(fallback: nil) { ::Gitlab::CurrentSettings.elasticsearch_search? },
             license_trial_ends_on: alt_usage_data(fallback: nil) { License.trial_ends_on },
-            geo_enabled: alt_usage_data(fallback: nil) { ::Gitlab::Geo.enabled? }
+            geo_enabled: alt_usage_data(fallback: nil) { ::Gitlab::Geo.enabled? },
+            user_cap_feature_enabled: add_metric('UserCapSettingEnabledMetric', time_frame: 'none')
           }
         end
 

ee/lib/gitlab/usage/metrics/instrumentations/user_cap_setting_enabled_metric.rb

+# frozen_string_literal: true
+
+module Gitlab
+  module Usage
+    module Metrics
+      module Instrumentations
+        class UserCapSettingEnabledMetric < ::Gitlab::Usage::Metrics::Instrumentations::GenericMetric
+          value do
+            ::Gitlab::CurrentSettings.new_user_signups_cap
+          end
+        end
+      end
+    end
+  end
+end

ee/spec/lib/ee/gitlab/usage/metrics/instrumentations/user_cap_setting_enabled_metric_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ::Gitlab::Usage::Metrics::Instrumentations::UserCapSettingEnabledMetric do
+  using RSpec::Parameterized::TableSyntax
+
+  where(:user_cap_feature_enabled, :expected_value) do
+    42 | 42
+    -1 | -1
+  end
+
+  with_them do
+    before do
+      stub_env('IN_MEMORY_APPLICATION_SETTINGS', 'false')
+      stub_application_setting(new_user_signups_cap: user_cap_feature_enabled)
+    end
+
+    it_behaves_like 'a correct instrumented metric value', {}
+  end
+end

spec/lib/gitlab/usage_data_spec.rb

@@ -1074,6 +1074,10 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
       it 'gathers service_ping_features_enabled' do
         expect(subject[:settings][:service_ping_features_enabled]).to eq(Gitlab::CurrentSettings.usage_ping_features_enabled)
       end
+
+      it 'gathers user_cap_feature_enabled' do
+        expect(subject[:settings][:user_cap_feature_enabled]).to eq(Gitlab::CurrentSettings.new_user_signups_cap)
+      end
     end
   end