Add metrics test

Author: kprokopenko

tests/integration/ydb_conn_metrics_test.go

@@ -0,0 +1,44 @@
+package integration
+
+import (
+	"context"
+	"testing"
+
+	"github.com/ydb-platform/ydb-go-sdk/v3"
+	"github.com/ydb-platform/ydb-go-sdk/v3/metrics"
+	"github.com/ydb-platform/ydb-go-sdk/v3/query"
+	"github.com/ydb-platform/ydb-go-sdk/v3/trace"
+)
+
+func TestYDBConnMetrics(t *testing.T) {
+	var (
+		scope    = newScope(t)
+		registry = &registryConfig{
+			details:    trace.DriverConnEvents,
+			gauges:     newVec[gaugeVec](),
+			counters:   newVec[counterVec](),
+			timers:     newVec[timerVec](),
+			histograms: newVec[histogramVec](),
+		}
+	)
+
+	db, err := ydb.Open(scope.Ctx, "grpc://localhost:2136/local", metrics.WithTraces(registry))
+	scope.Require.NoError(err)
+	defer db.Close(scope.Ctx) // cleanup resources
+
+	db.Query().Do(scope.Ctx, func(ctx context.Context, s query.Session) error {
+		return s.Exec(ctx, "SELECT 42")
+	})
+
+	metric := "ydb.driver.conns"
+	labelsNames := []string{"endpoint", "node_id"}
+	labels := map[string]string{"endpoint": "localhost:2136", "node_id": "1"}
+
+	gauges := registry.gauges.data[nameLabelNamesToString(metric, labelsNames)]
+	scope.Require.NotNil(gauges)
+
+	labeledGauges := gauges.gauges[nameLabelValuesToString(metric, labels)]
+	scope.Require.NotNil(labeledGauges)
+
+	scope.Require.EqualValues(1, labeledGauges.value)
+}