pref: add more unit tests, update readme

README.md

@@ -136,7 +136,7 @@ config.BindStruct("", &myConf)
 
 > `config.MapOnExists` like `BindStruct`，but map binding only if key exists
 
-### Direct Read data
+### Direct read data
 
 - Get integer
 
@@ -231,7 +231,7 @@ config.Bool("app_debug") // true
 config.String("app_name") // "config"
 ```
 
-## New Config Instance
+## New config instance
 
 You can create custom config instance
 
@@ -246,7 +246,32 @@ myConf := config.NewEmpty("my-conf")
 myConf := config.NewWithOptions("my-conf", config.ParseEnv, config.ReadOnly)
 ```
 
-## Available Options
+## Listen config change
+
+Now, you can add a hook func for listen config data change. then, you can do something like: write data to file
+
+Add hook func on create config:
+
+```go
+	hookFn := func(event string, c *Config) {
+		fmt.Println("fire the:", event)
+	}
+
+	c := NewWithOptions("test", WithHookFunc(hookFn))
+	// for global config
+	config.WithOptions(WithHookFunc(hookFn))
+```
+
+After that, when calling `LoadXXX, Set, SetData, ClearData` etc methods, it will output:
+
+```text
+fire the: load.data
+fire the: set.value
+fire the: set.data
+fire the: clean.data
+```
+
+## Available options
 
 ```go
 // Options config options

README.zh-CN.md

@@ -228,6 +228,31 @@ myConf := config.NewEmpty("my-conf")
 myConf := config.NewWithOptions("my-conf", config.ParseEnv, config.ReadOnly)
 ```
 
+## 监听配置更改
+
+现在，您可以添加一个挂钩函数来监听配置数据更改。然后，您可以执行一些自定义操作, 例如：将数据写入文件
+
+在创建配置时添加钩子函数:
+
+```go
+	hookFn := func(event string, c *Config) {
+		fmt.Println("fire the:", event)
+	}
+
+	c := NewWithOptions("test", WithHookFunc(hookFn))
+	// for global config
+	config.WithOptions(WithHookFunc(hookFn))
+```
+
+之后, 当调用 `LoadXXX, Set, SetData, ClearData` 等方法时, 就会输出:
+
+```text
+fire the: load.data
+fire the: set.value
+fire the: set.data
+fire the: clean.data
+```
+
 ## 可用选项
 
 ```go

config_test.go

@@ -341,6 +341,17 @@ func TestDelimiter(t *testing.T) {
 	is.NoError(err)
 	// is.Equal(1, c.Int("top0"))
 	is.Equal(2, c.Int("top1:sub0"))
+
+	// load will use defaultDelimiter
+	c = NewWithOptions("test", Delimiter(0))
+	is.Equal(byte(0), c.Options().Delimiter)
+
+	err = c.LoadData(map[string]interface{}{
+		"top0": 1,
+		"top1": map[string]int{"sub0": 2},
+	})
+	is.NoError(err)
+	is.Equal(2, c.Int("top1.sub0"))
 }
 
 func TestEnableCache(t *testing.T) {

export_test.go

@@ -251,3 +251,32 @@ func TestMapOnExists(t *testing.T) {
 	assert.Equal(t, 28, user.Age)
 	assert.Equal(t, "inhere", user.Name)
 }
+
+func TestConfig_BindStruct_set_DecoderConfig(t *testing.T) {
+	cfg := NewWith("test", func(c *Config) {
+		c.opts.DecoderConfig = nil
+	})
+	err := cfg.LoadStrings(JSON, `{
+"age": 28,
+"name": "inhere",
+"sports": ["pingPong", "跑步"]
+}`)
+	assert.NoError(t, err)
+
+	user := &struct {
+		Age    int
+		Name   string
+		Sports []string
+	}{}
+	assert.NoError(t, cfg.BindStruct("", user))
+
+	assert.Equal(t, 28, user.Age)
+	assert.Equal(t, "inhere", user.Name)
+
+	// not use ptr
+	assert.Error(t, cfg.BindStruct("", *user))
+}
+
+func TestConfig_BindStruct_error(t *testing.T) {
+	// cfg := NewEmpty()
+}

hclv2/hcl_v2.go

@@ -45,7 +45,7 @@ type hclDriver struct {
 	name string
 }
 
-// Name
+// Name get
 func (d *hclDriver) Name() string {
 	return d.name
 }