1 files changed, 35 insertions, 0 deletions
diff --git a/spec/lib/gitlab/graphql/tracing_spec.rb b/spec/lib/gitlab/graphql/tracing_spec.rb
new file mode 100644
index 00000000000..6bae737d0f6
--- /dev/null
+++ b/spec/lib/gitlab/graphql/tracing_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Graphql::Tracing do
+  let!(:graphql_duration_seconds) { double('Gitlab::Metrics::NullMetric') }
+
+  before do
+    allow(Gitlab::Metrics)
+      .to receive(:histogram)
+      .with(:graphql_duration_seconds, 'GraphQL execution time')
+      .and_return(graphql_duration_seconds)
+  end
+
+  it 'updates graphql histogram with expected labels' do
+    query = 'query { users { id } }'
+
+    expect_metric('graphql.lex', 'lex')
+    expect_metric('graphql.parse', 'parse')
+    expect_metric('graphql.validate', 'validate')
+    expect_metric('graphql.analyze', 'analyze_multiplex')
+    expect_metric('graphql.execute', 'execute_query_lazy')
+    expect_metric('graphql.execute', 'execute_multiplex')
+
+    GitlabSchema.execute(query)
+  end
+
+  private
+
+  def expect_metric(platform_key, key)
+    expect(graphql_duration_seconds)
+      .to receive(:observe)
+      .with({ platform_key: platform_key, key: key }, be > 0.0)
+  end
+end