[#493] cmd/node: Add policer section to config

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

cmd/neofs-node/config/policer/config.go

@@ -0,0 +1,27 @@
+package policerconfig
+
+import (
+	"time"
+
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-node/config"
+)
+
+const (
+	subsection = "policer"
+
+	// HeadTimeoutDefault is a default object.Head request timeout in policer.
+	HeadTimeoutDefault = 5 * time.Second
+)
+
+// HeadTimeout returns value of "head_timeout" config parameter
+// from "policer" section.
+//
+// Returns HeadTimeoutDefault if value is not positive duration.
+func HeadTimeout(c *config.Config) time.Duration {
+	v := config.DurationSafe(c.Sub(subsection), "head_timeout")
+	if v > 0 {
+		return v
+	}
+
+	return HeadTimeoutDefault
+}

cmd/neofs-node/config/policer/config_test.go

@@ -0,0 +1,31 @@
+package policerconfig_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-node/config"
+	policerconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/policer"
+	configtest "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestPolicerSection(t *testing.T) {
+	t.Run("defaults", func(t *testing.T) {
+		empty := configtest.EmptyConfig()
+
+		require.Equal(t, policerconfig.HeadTimeoutDefault, policerconfig.HeadTimeout(empty))
+	})
+
+	const path = "../../../../config/example/node"
+
+	var fileConfigTest = func(c *config.Config) {
+		require.Equal(t, 15*time.Second, policerconfig.HeadTimeout(c))
+	}
+
+	configtest.ForEachFileType(path, fileConfigTest)
+
+	t.Run("ENV", func(t *testing.T) {
+		configtest.ForEnvFileType(path, fileConfigTest)
+	})
+}