add itr_skippable_tests.response_tests metric

Author: anmarchenko

lib/datadog/ci/test_optimisation/component.rb

@@ -5,11 +5,13 @@
 require "datadog/core/utils/forking"
 
 require_relative "../ext/test"
+require_relative "../ext/telemetry"
 require_relative "../ext/transport"
 
 require_relative "../git/local_repository"
 
 require_relative "../utils/parsing"
+require_relative "../utils/telemetry"
 
 require_relative "coverage/event"
 require_relative "skippable"
@@ -239,6 +241,8 @@ def fetch_skippable_tests(test_session:, git_tree_upload_worker:)
           Datadog.logger.debug { "Fetched skippable tests: \n #{@skippable_tests}" }
           Datadog.logger.debug { "Found #{@skippable_tests.count} skippable tests." }
           Datadog.logger.debug { "ITR correlation ID: #{@correlation_id}" }
+
+          Utils::Telemetry.inc(Ext::Telemetry::METRIC_ITR_SKIPPABLE_TESTS_RESPONSE_TESTS, @skippable_tests.count)
         end
 
         def code_coverage_mode

lib/datadog/ci/test_optimisation/skippable.rb

@@ -2,9 +2,12 @@
 
 require "json"
 
+require_relative "../ext/telemetry"
 require_relative "../ext/transport"
 require_relative "../ext/test"
+require_relative "../transport/telemetry"
 require_relative "../utils/test_run"
+require_relative "../utils/telemetry"
 
 module Datadog
   module CI

spec/datadog/ci/test_optimisation/component_spec.rb

@@ -64,7 +64,7 @@
           fetch_skippable_tests: instance_double(
             Datadog::CI::TestOptimisation::Skippable::Response,
             correlation_id: "42",
-            tests: Set.new(["suite.test."])
+            tests: Set.new(["suite.test.", "suite.test2."])
           )
         )
       end
@@ -79,10 +79,12 @@
         expect(component.skipping_tests?).to be true
 
         expect(component.correlation_id).to eq("42")
-        expect(component.skippable_tests).to eq(Set.new(["suite.test."]))
+        expect(component.skippable_tests).to eq(Set.new(["suite.test.", "suite.test2."]))
 
         expect(git_worker).to have_received(:wait_until_done)
       end
+
+      it_behaves_like "emits telemetry metric", :inc, "itr_skippable_tests.response_tests", 2
     end
 
     context "when remote configuration call returned correct response with strings instead of bools" do