Count comments on notes and merge requests

This extends our existing `Gitlab::UsageDataCounters::NoteCounter` to
also count notes on commits and merge requests

changelogs/unreleased/bvl-mr-commit-note-counter.yml

+---
+title: Count comments on commits and merge requests
+merge_request: 31912
+author:
+type: other

lib/gitlab/usage_data_counters/note_counter.rb

@@ -4,7 +4,7 @@ module Gitlab::UsageDataCounters
   class NoteCounter < BaseCounter
     KNOWN_EVENTS = %w[create].freeze
     PREFIX = 'note'
-    COUNTABLE_TYPES = %w[Snippet].freeze
+    COUNTABLE_TYPES = %w[Snippet Commit MergeRequest].freeze
 
     class << self
       def redis_key(event, noteable_type)
@@ -24,9 +24,9 @@ module Gitlab::UsageDataCounters
       end
 
       def totals
-        {
-          snippet_comment: read(:create, 'Snippet')
-        }
+        COUNTABLE_TYPES.map do |countable_type|
+          [:"#{countable_type.underscore}_comment", read(:create, countable_type)]
+        end.to_h
       end
 
       private

spec/lib/gitlab/usage_data_counters/note_counter_spec.rb

@@ -26,16 +26,22 @@ describe Gitlab::UsageDataCounters::NoteCounter, :clean_gitlab_redis_shared_stat
   end
 
   it_behaves_like 'a note usage counter', :create, 'Snippet'
+  it_behaves_like 'a note usage counter', :create, 'MergeRequest'
+  it_behaves_like 'a note usage counter', :create, 'Commit'
 
   describe '.totals' do
     let(:combinations) do
       [
-        [:create, 'Snippet', 3]
+        [:create, 'Snippet', 3],
+        [:create, 'MergeRequest', 4],
+        [:create, 'Commit', 5]
       ]
     end
 
     let(:expected_totals) do
-      { snippet_comment: 3 }
+      { snippet_comment: 3,
+        merge_request_comment: 4,
+        commit_comment:  5 }
     end
 
     before do
@@ -57,14 +63,18 @@ describe Gitlab::UsageDataCounters::NoteCounter, :clean_gitlab_redis_shared_stat
     let(:unknown_event_error) { Gitlab::UsageDataCounters::BaseCounter::UnknownEvent }
 
     where(:event, :noteable_type, :expected_count, :should_raise) do
-      :create | 'Snippet' | 1 | false
-      :wibble | 'Snippet' | 0 | true
-      :create | 'Issue'   | 0 | false
-      :wibble | 'Issue'   | 0 | false
+      :create | 'Snippet'      | 1 | false
+      :wibble | 'Snippet'      | 0 | true
+      :create | 'MergeRequest' | 1 | false
+      :wibble | 'MergeRequest' | 0 | true
+      :create | 'Commit'       | 1 | false
+      :wibble | 'Commit'       | 0 | true
+      :create | 'Issue'        | 0 | false
+      :wibble | 'Issue'        | 0 | false
     end
 
     with_them do
-      it "handles event" do
+      it 'handles event' do
         if should_raise
           expect { described_class.count(event, noteable_type) }.to raise_error(unknown_event_error)
         else

spec/lib/gitlab/usage_data_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Gitlab::UsageData do
@@ -34,7 +36,7 @@ describe Gitlab::UsageData do
 
     subject { described_class.data }
 
-    it "gathers usage data" do
+    it 'gathers usage data' do
       expect(subject.keys).to include(*%i(
         active_user_count
         counts
@@ -66,6 +68,8 @@ describe Gitlab::UsageData do
         snippet_create: a_kind_of(Integer),
         snippet_update: a_kind_of(Integer),
         snippet_comment: a_kind_of(Integer),
+        merge_request_comment: a_kind_of(Integer),
+        commit_comment: a_kind_of(Integer),
         wiki_pages_create: a_kind_of(Integer),
         wiki_pages_update: a_kind_of(Integer),
         wiki_pages_delete: a_kind_of(Integer),
@@ -78,7 +82,7 @@ describe Gitlab::UsageData do
       )
     end
 
-    it "gathers usage counts" do
+    it 'gathers usage counts' do
       expected_keys = %i(
         assignee_lists
         boards
@@ -253,7 +257,7 @@ describe Gitlab::UsageData do
   describe '#license_usage_data' do
     subject { described_class.license_usage_data }
 
-    it "gathers license data" do
+    it 'gathers license data' do
       expect(subject[:uuid]).to eq(Gitlab::CurrentSettings.uuid)
       expect(subject[:version]).to eq(Gitlab::VERSION)
       expect(subject[:installation_type]).to eq('gitlab-development-kit')