add generate-metrics event

lib/datadog/core/telemetry/event.rb

@@ -286,6 +286,26 @@ def type
             'app-closing'
           end
         end
+
+        # Telemetry class for the 'generate-metrics' event
+        class GenerateMetrics < Base
+          def type
+            'generate-metrics'
+          end
+
+          def initialize(namespace, metric_series)
+            super()
+            @namespace = namespace
+            @metric_series = metric_series
+          end
+
+          def payload(_)
+            {
+              namespace: @namespace,
+              series: @metric_series.map(&:to_h)
+            }
+          end
+        end
       end
     end
   end

sig/datadog/core/telemetry/event.rbs

@@ -55,6 +55,13 @@ module Datadog
 
         class AppClosing < Base
         end
+
+        class GenerateMetrics < Base
+          @namespace: String
+          @metric_series: Enumerable[Hash[Symbol, untyped]]
+
+          def initialize: (String namespace, Enumerable[Hash[Symbol, untyped]] metric_series) -> void
+        end
       end
     end
   end

spec/datadog/core/telemetry/event_spec.rb

@@ -207,4 +207,22 @@ def contain_configuration(*array)
       is_expected.to eq({})
     end
   end
+
+  context 'GenerateMetrics' do
+    let(:event) { described_class::GenerateMetrics.new(namespace, metric_series) }
+
+    let(:namespace) { 'general' }
+    let(:metric_name) { 'request_count' }
+    let(:points) { [[123123123, 33]] }
+    let(:metric_series) { [{ metric: metric_name, points: points }] }
+
+    it do
+      is_expected.to eq(
+        {
+          namespace: namespace,
+          series: metric_series
+        }
+      )
+    end
+  end
 end