Merge branch '204891-define-boolean-counters-for-diff-truncation' into 'master'

Define counter for #truncated?

Closes #204891

See merge request gitlab-org/gitlab!25390

lib/gitlab/git/blob.rb

@@ -5,6 +5,7 @@ module Gitlab
     class Blob
       include Gitlab::BlobHelper
       include Gitlab::EncodingHelper
+      include Gitlab::Metrics::Methods
       extend Gitlab::Git::WrapsGitalyErrors
 
       # This number is the maximum amount of data that we want to display to
@@ -26,6 +27,14 @@ module Gitlab
 
       attr_accessor :name, :path, :size, :data, :mode, :id, :commit_id, :loaded_size, :binary
 
+      define_counter :gitlab_blob_truncated_true do
+        docstring 'blob.truncated? == true'
+      end
+
+      define_counter :gitlab_blob_truncated_false do
+        docstring 'blob.truncated? == false'
+      end
+
       class << self
         def find(repository, sha, path, limit: MAX_DATA_DISPLAY_SIZE)
           tree_entry(repository, sha, path, limit)

spec/lib/gitlab/git/blob_spec.rb

@@ -588,4 +588,14 @@ describe Gitlab::Git::Blob, :seed_helper do
       end
     end
   end
+
+  describe 'metrics' do
+    it 'defines :gitlab_blob_truncated_true counter' do
+      expect(described_class).to respond_to(:gitlab_blob_truncated_true)
+    end
+
+    it 'defines :gitlab_blob_truncated_false counter' do
+      expect(described_class).to respond_to(:gitlab_blob_truncated_false)
+    end
+  end
 end