1 files changed, 19 insertions, 1 deletions
diff --git a/spec/lib/gitlab/graphql/query_analyzers/logger_analyzer_spec.rb b/spec/lib/gitlab/graphql/query_analyzers/logger_analyzer_spec.rb
index 66033736e01..89d2ab8bb87 100644
--- a/spec/lib/gitlab/graphql/query_analyzers/logger_analyzer_spec.rb
+++ b/spec/lib/gitlab/graphql/query_analyzers/logger_analyzer_spec.rb
@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-describe Gitlab::Graphql::QueryAnalyzers::LoggerAnalyzer do
+RSpec.describe Gitlab::Graphql::QueryAnalyzers::LoggerAnalyzer do
   subject { described_class.new }
 
   describe '#analyze?' do
@@ -17,9 +17,27 @@ describe Gitlab::Graphql::QueryAnalyzers::LoggerAnalyzer do
     end
 
     context 'feature flag enabled by default' do
+      let(:monotonic_time_before) { 42 }
+      let(:monotonic_time_after) { 500 }
+      let(:monotonic_time_duration) { monotonic_time_after - monotonic_time_before }
+
       it 'enables the analyzer' do
         expect(subject.analyze?(anything)).to be_truthy
       end
+
+      it 'returns a duration in seconds' do
+        allow(GraphQL::Analysis).to receive(:analyze_query).and_return([4, 2])
+        allow(Gitlab::Metrics::System).to receive(:monotonic_time).and_return(monotonic_time_before, monotonic_time_after)
+        allow(Gitlab::GraphqlLogger).to receive(:info)
+
+        expected_duration = monotonic_time_duration
+        memo = subject.initial_value(spy('query'))
+
+        subject.final_value(memo)
+
+        expect(memo).to have_key(:duration_s)
+        expect(memo[:duration_s]).to eq(expected_duration)
+      end
     end
   end
 end