add duration type

internal/config/types/duration.go

@@ -0,0 +1,15 @@
+package types
+
+import (
+	"time"
+)
+
+type Duration struct {
+	time.Duration
+}
+
+func (d *Duration) UnmarshalText(data []byte) error {
+	var err error
+	d.Duration, err = time.ParseDuration(string(data))
+	return err
+}

internal/config/types/duration_test.go

@@ -0,0 +1,46 @@
+package types
+
+import (
+	"testing"
+	"time"
+)
+
+func TestDuration_UnmarshalText(t *testing.T) {
+	type args struct {
+		data []byte
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+		want    time.Duration
+	}{
+		{
+			"ok",
+			args{
+				data: []byte("10s"),
+			},
+			false,
+			time.Duration(10 * time.Second),
+		},
+		{
+			"error",
+			args{
+				data: []byte("10"),
+			},
+			true,
+			time.Duration(0),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			d := &Duration{}
+			if err := d.UnmarshalText(tt.args.data); (err != nil) != tt.wantErr {
+				t.Errorf("UnmarshalText() error = %v, wantErr %v", err, tt.wantErr)
+			}
+			if d.Duration != tt.want {
+				t.Errorf("UnmarshalText() got = %v, want %v", d.Duration, tt.want)
+			}
+		})
+	}
+}