diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 22c09d4..6fe7d54 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -48,7 +48,7 @@ jobs:
         reporter: github-pr-check
         # Report all results. [added,diff_context,file,nofilter].
         filter_mode: added
-        # Exit with 1 when it find at least one finding.
+        # Exit with 1 when it finds at least one finding.
         fail_on_error: true
 
     - name: Run unit tests
diff --git a/README.md b/README.md
index f63f6fb..e613279 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 [![GitHub tag (latest SemVer)](https://img.shields.io/github/tag/gookit/properties)](https://github.com/gookit/properties)
 [![Go Report Card](https://goreportcard.com/badge/github.com/gookit/properties)](https://goreportcard.com/report/github.com/gookit/properties)
 [![Go Reference](https://pkg.go.dev/badge/github.com/gookit/properties.svg)](https://pkg.go.dev/github.com/gookit/properties)
+[![Coverage Status](https://coveralls.io/repos/github/gookit/properties/badge.svg?branch=master)](https://coveralls.io/github/gookit/properties?branch=master)
 
 `properties` - Java Properties format contents parse, marshal and unmarshal library.
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 265679b..c85c5e3 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -5,6 +5,7 @@
 [![GitHub tag (latest SemVer)](https://img.shields.io/github/tag/gookit/properties)](https://github.com/gookit/properties)
 [![Go Report Card](https://goreportcard.com/badge/github.com/gookit/properties)](https://goreportcard.com/report/github.com/gookit/properties)
 [![Go Reference](https://pkg.go.dev/badge/github.com/gookit/properties.svg)](https://pkg.go.dev/github.com/gookit/properties)
+[![Coverage Status](https://coveralls.io/repos/github/gookit/properties/badge.svg?branch=master)](https://coveralls.io/github/gookit/properties?branch=master)
 
 `properties` - Java `Properties` 格式内容的解析器，编码解码库
 
diff --git a/encoder.go b/encoder.go
index 6583aa0..01fa143 100644
--- a/encoder.go
+++ b/encoder.go
@@ -15,6 +15,9 @@ type Encoder struct {
 	buf bytes.Buffer
 	// TagName for encode a struct. default: properties
 	TagName string
+	// comments map data. TODO
+	// key is path name, value is comments
+	// comments map[string]string
 }
 
 // NewEncoder instance.
@@ -53,11 +56,7 @@ func (e *Encoder) encode(v any) error {
 			Result:  &mp,
 		}
 
-		decoder, err := mapstructure.NewDecoder(cfg)
-		if err != nil {
-			return err
-		}
-
+		decoder, _ := mapstructure.NewDecoder(cfg)
 		if err := decoder.Decode(v); err != nil {
 			return err
 		}
diff --git a/encoder_test.go b/encoder_test.go
index 1b941b8..edbdbe7 100644
--- a/encoder_test.go
+++ b/encoder_test.go
@@ -3,6 +3,7 @@ package properties_test
 import (
 	"fmt"
 	"testing"
+	"time"
 
 	"github.com/gookit/goutil/testutil/assert"
 	"github.com/gookit/properties"
@@ -33,3 +34,30 @@ func TestEncode(t *testing.T) {
 	assert.NoErr(t, err)
 	assert.Nil(t, bs)
 }
+
+func TestEncode_struct(t *testing.T) {
+	type MyConf struct {
+		Name   string        `properties:"name"`
+		Age    int           `properties:"age"`
+		Expire time.Duration `properties:"expire"`
+	}
+
+	myc := &MyConf{
+		Name:   "inhere",
+		Age:    234,
+		Expire: time.Second * 3,
+	}
+
+	bs, err := properties.Encode(myc)
+	assert.NoErr(t, err)
+	str := string(bs)
+	assert.StrContains(t, str, "name=inhere")
+	assert.StrContains(t, str, "age=234")
+	assert.StrContains(t, str, "expire=3000000000")
+}
+
+func TestEncode_error(t *testing.T) {
+	bs, err := properties.Encode([]int{12, 34})
+	assert.Nil(t, bs)
+	assert.ErrMsg(t, err, "only allow encode map and struct data")
+}
diff --git a/options_test.go b/options_test.go
index 95617ae..454271c 100644
--- a/options_test.go
+++ b/options_test.go
@@ -9,6 +9,15 @@ import (
 	"github.com/gookit/properties"
 )
 
+func TestOptions_basic(t *testing.T) {
+	opt := &properties.Options{}
+
+	fn := properties.WithTagName("config")
+	fn(opt)
+
+	assert.Eq(t, "config", opt.TagName)
+}
+
 func TestOptions_InlineComment(t *testing.T) {
 	text := `
 key = value # inline comments